updated image location

README.md

@@ -0,0 +1,50 @@
+# openscad IDT creation scripts
+
+these are a collection of scripts and layout for creating IDTs within openscad as well as some fun
+layout on wafers. Currently these scripts only support bidirectional IDT but i will be adding more
+in the future. but you could create cool IDT on wafers like this:
+
+![alt text](res/image.png)
+
+
+## to start
+
+- download openscad
+```bash
+$ sudo apt install openscad
+```
+- clone this repo
+```bash
+$ git clone https://git.sirlilpanda.studio/sirlilpanda/openscad_parameteric_IDT_creation_scripts.git
+```
+- create a new openscad file within wafer layouts for this example it will be called `your_new_idt_layout.scad`
+```
+...
+|
+├ wafer_layouts
+|    ├ cross_pattern_idt.scad
+|    ├ hex_layout_idt.scad
+|    ├ pair_idt.scad
+|    ├ quadrant_array.scad
+|    ├ your_new_idt_layout.scad
+|    └ single_idt.scad
+├ common_params.scad
+└ README.md
+```
+- add the required files to get started in your `your_new_idt_layout.scad`
+``` scad
+// > your_new_idt_layout.scad
+// the idt module itself 
+include <../modules/bidirectional_idt.scad>
+
+// a module for nicely displaying the parameters used for your idt
+include <../modules/parameter_text.scad>
+
+// a simple wafer model that wont get added in to your final design
+include <../modules/wafer.scad>
+
+```
+- and lastly copy in the `common_params.scad` in to your `your_new_idt_layout.scad`, these are just common parameters that each design need such as frequency and speed of sound in your substrate.
+- now you can add as many idts to the wafer as you want.
+
+check out `single_idt.scad` and `quadrant_array.scad` to see what is possible with these scripts.

common_paramas.scad

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+// ================= openscad prams =================
+$fa = 1;
+$fs = 0.01;
+// ================= openscad prams =================
+
+// ================= meta =================
+SCRIPT_VERSION="0.0.1";
+// this really just need to be any mon font
+FONT="Ubuntu Sans Mono:style=Regular";
+test_number = 1;
+// scale in m
+scale_unit = 1e3;
+// ================= meta =================
+
+
+// ================= IDT =================
+substrate = "SI";
+// linbo
+c = 3992.0;
+// si
+// c = 3159.0;
+freq = 50.0e6;
+
+// $fs = (c/freq);
+
+// inout distance
+distance = 50;
+
+// number of finger
+n_fingers = 50;
+
+// should be 50-70
+finger_length = 60; 
+
+// for tweaking the design
+gap = 0;
+
+// for tweaking the design
+thickness = 0;
+
+has_id_number = false;
+// ================= IDT =================
+
+// ================= bond pad =================
+leg_length = 0.003;
+leg_width = 0.00001875;
+leg_angle = 10;
+size = 0.002;
+bond_pad_shape = "square";
+// ================= bond pad =================
+
+// ================= text =================
+info_block_offset_x=7;
+info_block_offset_y=30;
+info_block_scale=0.3;
+title_text_size = 4;
+prop_text_size = 2.5;
+id_text_size = 1;
+// ================= text =================
+
+// ================= array spacings =================
+number_of_idts_per_quadrent=4;
+idt_x_spacing = 10;
+idt_y_spacing = 12.5;
+// ================= array spacings =================
+
+
+// ================= wafers =================
+wafer_size_inch = 4;
+// ================= wafers =================

delay_line.scad

@@ -1,481 +0,0 @@
-// inputs, delay line config
-// will have to scale approperly
-$fa = 1;
-$fs = 0.01;
-
-SCRIPT_VERSION="0.0.1";
-FONT="Ubuntu Sans Mono:style=Regular";
-// lambda = 7.5;
-
-substrate = "SI";
-test_number = 1;
-// linbo
-c = 3992.0;
-// si
-// c = 3159.0;
-freq = 50.0e6;
-
-// $fs = (c/freq);
-
-// inout distance
-distance = 50;
-
-// number of finger
-n_fingers = 50;
-
-// should be 50-70
-finger_length = 60; 
-
-// for tweaking the design
-gap = 0;
-
-// for tweaking the design
-thickness = 0;
-
-// scale in m
-scale_unit = 1e3;
-
-leg_length = 0.003;
-leg_width = 0.00001875;
-leg_angle = 10;
-size = 0.002;
-bond_pad_shape = "square";
-
-
-info_block_offset_x=7;
-info_block_offset_y=30;
-info_block_scale=0.3;
-title_text_size = 4;
-prop_text_size = 2.5;
-id_text_size = 2;
-
-number_of_idts_per_quadrent=4;
-idt_x_spacing = 10;
-idt_y_spacing = 7;
-
-wafer_size_inch = 4;
-
-function length(point_1, point_2) = sqrt(
-    (point_1-point_2).x^2 +
-    (point_1-point_2).y^2 +
-    (point_1-point_2).z^2
-);
-
-
-// creates 1 side of the idt
-module delay_line(lambda = 1, n_fingers = 1, finger_length = 50, gap = 0, thickness = 0) {
-    // code
-    l45 =lambda*5/4;
-    l2 = lambda/2;
-    l4 = lambda/4;
-    l8 = lambda/8;
-    b = l4 + thickness;
-    f = l4 + finger_length*lambda;
-
-    points_cap = [
-        [0, 0],
-        [0, l2],
-        [-b-f, l2],
-        [-b-f, l4],
-        [-b, l4],
-        [-b, 0]
-    ];
-
-    points = [
-        [0, 0],
-        [b, 0],
-        [b, l2],
-        [b+f, l2],
-        [b+f, l2+l4],
-        [b, l2+l4],
-        [b, l4*5-l4],
-        [0, l4*5-l4]
-    ];
-    // union () {
-
-    translate([0, l2, 0]){
-            for(i = [0:n_fingers]){
-                translate([0, i*(l45-l4), 0]) {
-                polygon(points);
-                }
-            }
-
-        color("red") {
-            rotate([0, 0, 180])
-            translate([0, 0, 0]) {
-                polygon(points_cap);
-            }
-
-            translate([f+l2+gap+thickness, -l2, 0]) {
-                square(size=[l4+thickness, l4]);
-            }
-        }
-
-        
-            union() {
-                for(i = [0:n_fingers]){
-                    translate([2*b+f+gap+l4, i*(l45-l4)+l2+l4 , 0]) 
-                    rotate([0, 0, 180])
-                    polygon(points);
-                }
-            }
-        
-        color("red") {
-            translate([2*b+f+gap+l4, n_fingers*lambda+lambda-l4, 0]) {
-                polygon(points_cap);
-            }
-            translate([0, n_fingers*lambda+lambda, 0]) {
-                square(size=[l4+thickness, l4]);
-            }
-        }
-
-    }
-}
-
-
-// todo fix this
-// units in m, the size is the min bond pad size
-module bond_pad(
-    leg_length = 0.000075, 
-    leg_width = 0.00001875,
-    leg_length_tweak = 0,
-    leg_angle = 45, 
-    size = 0.000075, 
-    bond_pad_shape = "square", 
-    post_scale = false
-) {
-    if (post_scale) {
-        circle(r=leg_width*post_scale);
-
-        rotate([0, 0, leg_angle+180]) {
-            translate([-leg_length*post_scale-leg_length_tweak, -leg_width*post_scale/2, 0]) {
-                // color([0, 255/255, 255/255]) {
-                    // arm
-                    square(size=[(leg_length)*post_scale+leg_length_tweak, leg_width*post_scale]);                
-                // }
-            }
-        }
-        // pad
-        translate([post_scale*leg_length*cos(leg_angle), post_scale*leg_length*sin(leg_angle), 0]) {
-            square(size=[size*post_scale, size*post_scale], center=true);
-        }
-
-        // echo(str("x = ", post_scale*leg_length*cos(leg_angle+180)));
-        // echo(str("y = ", post_scale*leg_length*sin(leg_angle+180)));
-
-    
-    } else {
-        rotate([0, 0, leg_angle+180]) {
-            translate([-leg_length/2, -leg_width, 0]) {
-                // color([0, 255/255, 255/255]) {
-                    square(size=[leg_length, leg_width]);                
-                // }
-            }
-        }
-        square(size=[size, size], center=true);
-    }
-}
-
-// creates the input and output ids
-module delay_line_idt(
-    c, 
-    f, 
-    n_fingers, 
-    distance = 100, 
-    finger_length = 50, 
-    gap = 0, 
-    thickness = 0, 
-    impedance = 50, 
-    has_bond_pads = false,
-    bond_pad_leg_length = 0.00005, 
-    bond_pad_leg_width = 0.00001875, 
-    bond_pad_size = 0.000075,
-    bond_pad_angle = 45,
-    bond_pad_bond_pad_shape = "square",
-    post_scale = false,
-    id_number = 0,
-    has_id = true
-) {
-
-    local_scale = 0;
-    // echo("===== DELAY LINE IDT INFO ===== ");
-
-    if (post_scale) {
-        lambda = c/f * post_scale;
-        // dont worry about these magic fractions
-        length_of_input = n_fingers*lambda+1.74*lambda;
-        // n_fingers*lambda+lambda/2;
-        
-        
-        echo(str("lambda = ", lambda));
-        // echo(str("lambda/4 = ", lambda/4));
-        // echo(str("lambda_scale = ", post_scale));
-        delay_line(lambda, n_fingers, finger_length, gap, thickness);
-
-
-
-        if (has_id) {
-            color([255/255, 0/255, 255/255]) 
-            translate([finger_length*lambda/2, has_bond_pads ? -(bond_pad_leg_length * post_scale * cos(bond_pad_angle)) : -lambda*finger_length/2, 0])
-            text(str(id_number), size=id_text_size, halign="center");
-        }
-
-        color([0/255, 255/255, 128/255]) {
-            translate([0, distance*lambda+length_of_input, 0]) {
-                delay_line(lambda, n_fingers, finger_length, gap, thickness);
-            }
-        }
-
-        // near ori
-        rotate([0, 0, -90]) {
-            if (has_bond_pads) {
-                color([255/255, 255/255, 255/255]) {
-                    bond_pad(
-                        leg_length_tweak = lambda/4,
-                        leg_width=c/f/4, 
-                        leg_length=length(
-                            [0,0,0], 
-                            [bond_pad_leg_length, bond_pad_leg_length, 0]
-                        ), 
-                        leg_angle = -bond_pad_angle,
-                        size = bond_pad_size, 
-                        post_scale=scale_unit
-                    );
-                }
-            }
-        }
-        // near side
-        
-        translate([lambda*finger_length+gap+thickness*2+lambda, 0, 0]) {
-            rotate([0, 0, -90]) {
-                    if (has_bond_pads) {
-                        bond_pad(
-                            leg_length_tweak = lambda/5,
-                            leg_width=c/f/4, 
-                            leg_length=length(
-                                [0,0,0], 
-                                [bond_pad_leg_length, bond_pad_leg_length, 0]
-                            ), 
-                            leg_angle = bond_pad_angle,
-                            size = bond_pad_size, 
-                            post_scale=scale_unit
-                        );
-                }
-            }
-        }
-
-        // far side
-        translate([0, length_of_input+distance*lambda+length_of_input, 0]) {   
-                rotate([0, 0, 90]) {                    
-                    if (has_bond_pads) {
-                        bond_pad(
-                            leg_length_tweak = lambda/5,
-                            leg_width=c/f/4, 
-                            leg_length=length(
-                                [0,0,0], 
-                                [bond_pad_leg_length, bond_pad_leg_length, 0]
-                            ), 
-                            leg_angle = bond_pad_angle,
-                            size = bond_pad_size, 
-                            post_scale=scale_unit
-                        );
-                    }
-                }
-                // furthest side
-                translate([lambda*finger_length+gap+thickness*2+lambda, 0, 0]) {
-                    rotate([0, 0, 90]) {                    
-                            if (has_bond_pads) {
-                                bond_pad(
-                                    leg_length_tweak = lambda/4,
-                                    leg_width=c/f/4, 
-                                    leg_length=length(
-                                        [0,0,0], 
-                                        [bond_pad_leg_length, bond_pad_leg_length, 0]
-                                    ), 
-                                    leg_angle = -bond_pad_angle,
-                                    size = bond_pad_size, 
-                                    post_scale=scale_unit
-                                );
-                        }
-                    }
-                }
-        } 
-    } else {
-        lambda = 1;
-        length_of_input = n_fingers*lambda*15/8;
-        echo(str("lambda = ", lambda));
-        echo(str("lambda_scale = ", 1));
-        delay_line(lambda, n_fingers, finger_length, gap, thickness);
-        translate([0, length_of_input+distance*lambda, 0])
-        delay_line(lambda, n_fingers, finger_length, gap, thickness);
-    }
-
-    // echo(str("impedance = ", impedance));
-
-    // echo(str("total capacitance = ", 1/(2*PI*f*impedance)));
-
-    // echo("===== DELAY LINE IDT INFO ===== ");
-}
-
-module wafer(d) {
-    color([128/255, 128/255, 128/255]) {
-        translate([0, 0, -1]) {
-            circle(r=d/2);
-        }
-    }
-}
-
-module prameter_text() {
-text(str("IDT ", substrate, "#", test_number), size=4, font=FONT);
-translate([0, -title_text_size, 0])    
-text(str("c              : ", c), size=prop_text_size, font=FONT);
-translate([0, -title_text_size*2, 0])    
-text(str("freq           : ", freq), size=prop_text_size, font=FONT);
-translate([0, -title_text_size*3, 0])    
-text(str("distance       : ", distance), size=prop_text_size, font=FONT);
-translate([0, -title_text_size*4, 0])    
-text(str("n_fingers      : ", n_fingers), size=prop_text_size, font=FONT);
-translate([0, -title_text_size*5, 0])    
-text(str("finger_length  : ", finger_length), size=prop_text_size, font=FONT);
-translate([0, -title_text_size*6, 0])    
-text(str("gap            : ", gap), size=prop_text_size, font=FONT);
-translate([0, -title_text_size*7, 0])    
-text(str("thickness      : ", thickness), size=prop_text_size, font=FONT);
-translate([0, -title_text_size*8, 0])    
-text(str("leg_length     : ", leg_length), size=prop_text_size, font=FONT);
-translate([0, -title_text_size*9, 0])    
-text(str("leg_angle      : ", leg_angle), size=prop_text_size, font=FONT);
-translate([0, -title_text_size*10, 0])    
-text(str("size           : ", size), size=prop_text_size, font=FONT);
-translate([0, -title_text_size*11, 0])    
-text(str("feat. size (mm): ", (c/freq)*1e3), size=prop_text_size, font=FONT);
-translate([0, -title_text_size*12, 0])    
-text(str("version        : ", SCRIPT_VERSION), size=prop_text_size, font=FONT);
-
-}
-
-
-
-translate([info_block_offset_x, -info_block_offset_y, 0]) {
-rotate([0, 0, -90]) 
-scale([info_block_scale, info_block_scale, info_block_scale]) {
-    prameter_text();
-}
-}
-
-rotate([0, 0, 180])
-translate([info_block_offset_x, -info_block_offset_y, 0]) {
-rotate([0, 0, -90]) 
-scale([info_block_scale, info_block_scale, info_block_scale]) {
-    prameter_text();
-}
-}
-
-// delay_line_idt(
-//     c, 
-//     freq, 
-//     n_fingers, 
-//     distance, 
-//     finger_length, 
-//     gap, 
-//     thickness, 
-//     post_scale=scale_unit,
-//     has_bond_pads = true,
-//     bond_pad_angle = leg_angle,
-//     bond_pad_leg_width = leg_width,
-//     bond_pad_leg_length = leg_length,
-//     bond_pad_size = size 
-// );
-
-
-// wafer(wafer_size_inch*25.4);
-for (i=[0:number_of_idts_per_quadrent-1]) {
-    translate([idt_x_spacing/4, 0, 0]) {
-    translate([i * idt_x_spacing, idt_y_spacing, 0]) {
-            delay_line_idt(
-                c, 
-                freq, 
-                n_fingers, 
-                distance, 
-                finger_length, 
-                gap, 
-                thickness, 
-                post_scale=scale_unit,
-                has_bond_pads = true,
-                bond_pad_angle = leg_angle,
-                bond_pad_leg_width = leg_width,
-                bond_pad_leg_length = leg_length,
-                bond_pad_size = size 
-            );
-    }
-    translate([i * idt_x_spacing, -idt_y_spacing, 0]) {
-        scale([1, -1, 1]) {
-            delay_line_idt(
-                c, 
-                freq, 
-                n_fingers, 
-                distance, 
-                finger_length, 
-                gap, 
-                thickness, 
-                post_scale=scale_unit,
-                has_bond_pads = true,
-                bond_pad_angle = leg_angle,
-                bond_pad_leg_width = leg_width,
-                bond_pad_leg_length = leg_length,
-                bond_pad_size = size 
-            );
-        }
-    }
-    }
-
-    scale([-1, 1, 1])
-    translate([idt_x_spacing/4, 0, 0]) {
-        
-    translate([i * idt_x_spacing, idt_y_spacing, 0]) {
-            delay_line_idt(
-                c, 
-                freq, 
-                n_fingers, 
-                distance, 
-                finger_length, 
-                gap, 
-                thickness, 
-                post_scale=scale_unit,
-                has_bond_pads = true,
-                bond_pad_angle = leg_angle,
-                bond_pad_leg_width = leg_width,
-                bond_pad_leg_length = leg_length,
-                bond_pad_size = size 
-            );
-    }
-    translate([i * idt_x_spacing, -idt_y_spacing, 0]) {
-        scale([1, -1, 1]) {
-            delay_line_idt(
-                c, 
-                freq, 
-                n_fingers, 
-                distance, 
-                finger_length, 
-                gap, 
-                thickness, 
-                post_scale=scale_unit,
-                has_bond_pads = true,
-                bond_pad_angle = leg_angle,
-                bond_pad_leg_width = leg_width,
-                bond_pad_leg_length = leg_length,
-                bond_pad_size = size 
-            );
-        }
-    }
-    }
-}
-
-// bond_pad(
-//     leg_length = 0.0075, 
-//     leg_width = 0.00001875,
-//     leg_angle = 20, 
-//     size = 0.0075, 
-//     bond_pad_shape = "square", 
-//     post_scale = scale_unit
-// );

modules/bidirectional_idt.scad

@@ -0,0 +1,150 @@
+include <idt.scad>
+include <bond_pad.scad>
+
+// creates the input and output idts
+// [TODO] clean this
+module bi_directional_idt(
+    c, 
+    f, 
+    n_fingers, 
+    distance = 100, 
+    finger_length = 50, 
+    gap = 0, 
+    thickness = 0, 
+    impedance = 50,
+
+    // bond pad prams
+    has_bond_pads = false,
+    bond_pad_leg_length = 0.00005, 
+    bond_pad_leg_width = 0.00001875, 
+    bond_pad_size = 0.000075,
+    bond_pad_angle = 45,
+    bond_pad_bond_pad_shape = "square",
+
+    // id number prams
+    id_number = 0,
+    has_id = false,
+    id_flip_dir = [1, 1, 1],
+    // extra
+    post_scale = 1,
+    echo_stats = false,
+    center = false
+) {
+        
+
+    lambda = c/f * post_scale;
+    // dont worry about these magic fractions
+    length_of_input = n_fingers*lambda+1.74*lambda;
+
+
+    should_be_centered = center ? 1 : 0;
+    center_offset_y = length_of_input + distance * lambda/2;
+    center_offset_x = finger_length*lambda/2 + gap/2 + thickness;
+
+    translate([-center_offset_x * should_be_centered, -center_offset_y * should_be_centered, 0]) {
+
+    if (has_id) {
+        color([255/255, 0/255, 255/255])
+        translate([finger_length*lambda/2, has_bond_pads ? -(bond_pad_leg_length * post_scale * cos(bond_pad_angle)) : -lambda*finger_length/2, 0])
+        scale(id_flip_dir)
+        text(str(id_number), size=id_text_size, halign="center");
+    }
+    
+    
+
+    // echo(str("lambda_scale = ", post_scale));
+    delay_line(lambda, n_fingers, finger_length, gap, thickness);
+
+
+    color([0/255, 255/255, 128/255]) {
+        translate([0, distance*lambda+length_of_input, 0]) {
+            delay_line(lambda, n_fingers, finger_length, gap, thickness);
+        }
+    }
+
+    // near ori
+    rotate([0, 0, -90]) {
+        if (has_bond_pads) {
+            color([255/255, 255/255, 255/255]) {
+                bond_pad(
+                    leg_length_tweak = lambda/4,
+                    leg_width=c/f/4, 
+                    leg_length=length(
+                        [0,0,0], 
+                        [bond_pad_leg_length, bond_pad_leg_length, 0]
+                    ), 
+                    leg_angle = -bond_pad_angle,
+                    size = bond_pad_size, 
+                    post_scale=scale_unit
+                );
+            }
+        }
+    }
+    // near side
+    
+    translate([lambda*finger_length+gap+thickness*2+lambda, 0, 0]) {
+        rotate([0, 0, -90]) {
+                if (has_bond_pads) {
+                    bond_pad(
+                        leg_length_tweak = lambda/5,
+                        leg_width=c/f/4, 
+                        leg_length=length(
+                            [0,0,0], 
+                            [bond_pad_leg_length, bond_pad_leg_length, 0]
+                        ), 
+                        leg_angle = bond_pad_angle,
+                        size = bond_pad_size, 
+                        post_scale=scale_unit
+                    );
+            }
+        }
+    }
+
+    // far side
+    translate([0, length_of_input+distance*lambda+length_of_input, 0]) {   
+            rotate([0, 0, 90]) {                    
+                if (has_bond_pads) {
+                    bond_pad(
+                        leg_length_tweak = lambda/5,
+                        leg_width=c/f/4, 
+                        leg_length=length(
+                            [0,0,0], 
+                            [bond_pad_leg_length, bond_pad_leg_length, 0]
+                        ), 
+                        leg_angle = bond_pad_angle,
+                        size = bond_pad_size, 
+                        post_scale=scale_unit
+                    );
+                }
+            }
+            // furthest side
+            translate([lambda*finger_length+gap+thickness*2+lambda, 0, 0]) {
+                rotate([0, 0, 90]) {                    
+                        if (has_bond_pads) {
+                            bond_pad(
+                                leg_length_tweak = lambda/4,
+                                leg_width=c/f/4, 
+                                leg_length=length(
+                                    [0,0,0], 
+                                    [bond_pad_leg_length, bond_pad_leg_length, 0]
+                                ), 
+                                leg_angle = -bond_pad_angle,
+                                size = bond_pad_size, 
+                                post_scale=scale_unit
+                            );
+                    }
+                }
+            }
+    } 
+    }
+
+
+    if (echo_stats) {
+        echo("===== DELAY LINE IDT INFO ===== ");
+        echo(str("lambda = ", lambda));
+        echo(str("min feature size lambda/4 = ", lambda/4));
+        echo(str("impedance = ", impedance));
+        echo(str("total capacitance = ", 1/(2*PI*f*impedance)));
+        echo("===== DELAY LINE IDT INFO ===== ");
+    }
+}

modules/bond_pad.scad

@@ -0,0 +1,48 @@
+function length(point_1, point_2) = sqrt(
+    (point_1-point_2).x^2 +
+    (point_1-point_2).y^2 +
+    (point_1-point_2).z^2
+);
+
+// todo fix this
+// units in m, the size is the min bond pad size
+module bond_pad(
+    leg_length = 0.000075, 
+    leg_width = 0.00001875,
+    leg_length_tweak = 0,
+    leg_angle = 45, 
+    size = 0.000075, 
+    bond_pad_shape = "square", 
+    post_scale = false
+) {
+    if (post_scale) {
+        circle(r=leg_width*post_scale);
+
+        rotate([0, 0, leg_angle+180]) {
+            translate([-leg_length*post_scale-leg_length_tweak, -leg_width*post_scale/2, 0]) {
+                // color([0, 255/255, 255/255]) {
+                    // arm
+                    square(size=[(leg_length)*post_scale+leg_length_tweak, leg_width*post_scale]);                
+                // }
+            }
+        }
+        // pad
+        translate([post_scale*leg_length*cos(leg_angle), post_scale*leg_length*sin(leg_angle), 0]) {
+            square(size=[size*post_scale, size*post_scale], center=true);
+        }
+
+        // echo(str("x = ", post_scale*leg_length*cos(leg_angle+180)));
+        // echo(str("y = ", post_scale*leg_length*sin(leg_angle+180)));
+
+    
+    } else {
+        rotate([0, 0, leg_angle+180]) {
+            translate([-leg_length/2, -leg_width, 0]) {
+                // color([0, 255/255, 255/255]) {
+                    square(size=[leg_length, leg_width]);                
+                // }
+            }
+        }
+        square(size=[size, size], center=true);
+    }
+}

modules/idt.scad

@@ -0,0 +1,69 @@
+// creates 1 side of the idt
+module delay_line(lambda = 1, n_fingers = 1, finger_length = 50, gap = 0, thickness = 0) {
+    // code
+    l45 =lambda*5/4;
+    l2 = lambda/2;
+    l4 = lambda/4;
+    l8 = lambda/8;
+    b = l4 + thickness;
+    f = l4 + finger_length*lambda;
+
+    points_cap = [
+        [0, 0],
+        [0, l2],
+        [-b-f, l2],
+        [-b-f, l4],
+        [-b, l4],
+        [-b, 0]
+    ];
+
+    points = [
+        [0, 0],
+        [b, 0],
+        [b, l2],
+        [b+f, l2],
+        [b+f, l2+l4],
+        [b, l2+l4],
+        [b, l4*5-l4],
+        [0, l4*5-l4]
+    ];
+    // union () {
+
+    translate([0, l2, 0]){
+            for(i = [0:n_fingers]){
+                translate([0, i*(l45-l4), 0]) {
+                polygon(points);
+                }
+            }
+
+        color("red") {
+            rotate([0, 0, 180])
+            translate([0, 0, 0]) {
+                polygon(points_cap);
+            }
+
+            translate([f+l2+gap+thickness, -l2, 0]) {
+                square(size=[l4+thickness, l4]);
+            }
+        }
+
+        
+            union() {
+                for(i = [0:n_fingers]){
+                    translate([2*b+f+gap+l4, i*(l45-l4)+l2+l4 , 0]) 
+                    rotate([0, 0, 180])
+                    polygon(points);
+                }
+            }
+        
+        color("red") {
+            translate([2*b+f+gap+l4, n_fingers*lambda+lambda-l4, 0]) {
+                polygon(points_cap);
+            }
+            translate([0, n_fingers*lambda+lambda, 0]) {
+                square(size=[l4+thickness, l4]);
+            }
+        }
+
+    }
+}

modules/parameter_text.scad

@@ -0,0 +1,15 @@
+module parameter_text(
+    heading,
+    params,
+    heading_size = 4,
+    param_size = 2.5,
+    font = "Ubuntu Sans Mono:style=Regular",
+    center = false
+) {
+    text(heading, size=heading_size, font=FONT, halign = center ? "center" : "left");
+    for (i=[0:len(params)]) {
+        translate([0, -heading_size*(i+1), 0])    
+        text(params[i], size=param_size, font=FONT, halign = center ? "center" : "left");
+    }
+}
+

modules/wafer.scad

@@ -0,0 +1,11 @@
+
+
+
+// [TODO] try add the flat edge on to the wafer
+module wafer(d) {
+    if ($preview) {
+        color([128/255, 128/255, 128/255])
+        translate([0, 0, -1])
+        circle(r=d/2);
+    }
+}

params/quadrant_array_16_50MHz.json

@@ -0,0 +1,37 @@
+{
+    "parameterSets": {
+        "design default values": {
+            "$fa": "1",
+            "$fs": "0.01",
+            "FONT": "Ubuntu Sans Mono:style=Regular",
+            "SCRIPT_VERSION": "0.0.1",
+            "bond_pad_shape": "square",
+            "c": "3992",
+            "distance": "50",
+            "finger_length": "60",
+            "freq": "5e+7",
+            "gap": "0",
+            "has_id_number": "true",
+            "id_text_size": "1",
+            "idt_x_spacing": "10",
+            "idt_y_spacing": "12.5",
+            "info_block_offset_x": "7",
+            "info_block_offset_y": "30",
+            "info_block_scale": "0.3",
+            "leg_angle": "10",
+            "leg_length": "0.003",
+            "leg_width": "0.00001875",
+            "n_fingers": "50",
+            "number_of_idts_per_quadrent": "4",
+            "prop_text_size": "2.5",
+            "scale_unit": "1000",
+            "size": "0.002",
+            "substrate": "SI",
+            "test_number": "1",
+            "thickness": "0",
+            "title_text_size": "4",
+            "wafer_size_inch": "4"
+        }
+    },
+    "fileFormatVersion": "1"
+}

wafer_layouts/cross_pattern_idt.scad

@@ -0,0 +1,151 @@
+include <../modules/bidirectional_idt.scad>
+include <../modules/parameter_text.scad>
+include <../modules/wafer.scad>
+
+// ================= README =================
+// these are the normal parameters used by
+// each one of the layout scripts
+// however they do dont directly use them
+// and instead have thier own copy
+//
+// this was done in order to have more control
+// over each of the scripts themsevels 
+// allowing each to have even more parameters
+// and having them show up in the open scad
+// parameters window
+// ================= README =================
+
+// ================= openscad prams =================
+$fa = 1;
+$fs = 0.01;
+// ================= openscad prams =================
+
+// ================= meta =================
+SCRIPT_VERSION="0.0.1";
+// this really just need to be any mon font
+FONT="Ubuntu Sans Mono:style=Regular";
+test_number = 1;
+// scale in m
+scale_unit = 1e3;
+// ================= meta =================
+
+
+// ================= IDT =================
+substrate = "LINBO";
+// linbo
+c = 3992.0;
+// si
+// c = 3159.0;
+freq = 50.0e6;
+
+// $fs = (c/freq);
+
+// inout distance
+distance = 150;
+
+// number of finger
+n_fingers = 50;
+
+// should be 50-70
+finger_length = 60; 
+
+// for tweaking the design
+gap = 0;
+
+// for tweaking the design
+thickness = 0;
+
+has_id_number = false;
+// ================= IDT =================
+
+// ================= bond pad =================
+leg_length = 0.003;
+leg_width = 0.00001875;
+leg_angle = 10;
+size = 0.002;
+bond_pad_shape = "square";
+// ================= bond pad =================
+
+// ================= text =================
+info_block_offset_x=20;
+info_block_offset_y=-30;
+info_block_scale=0.3;
+title_text_size = 4;
+prop_text_size = 2.5;
+id_text_size = 1;
+// ================= text =================
+
+// ================= IDT Pos =================
+idt_1_x_offset = 0;
+idt_1_y_offset = 0;
+idt_2_x_offset = 0;
+idt_2_y_offset = 0;
+// ================= IDT Pos =================
+
+
+// ================= wafers =================
+wafer_size_inch = 4;
+// ================= wafers =================
+
+module params() {
+    parameter_text(
+        str("IDT ", substrate, "#", test_number),
+        [
+            str("c          (ms): ", c),
+            str("freq       (Hz): ", freq),
+            str("distance       : ", distance),
+            str("n_fingers      : ", n_fingers),
+            str("finger_length  : ", finger_length),
+            str("gap            : ", gap),
+            str("thickness      : ", thickness),
+            str("leg_length     : ", leg_length),
+            str("leg_angle      : ", leg_angle),
+            str("size           : ", size),
+            str("feat. size (mm): ", (c/freq)*1e3),
+            str("version        : ", SCRIPT_VERSION)
+        ]
+    );
+}
+
+translate([info_block_offset_x, -info_block_offset_y, 0])
+scale([info_block_scale, info_block_scale, info_block_scale])
+params();
+
+wafer(wafer_size_inch*25.4);
+
+translate([idt_1_x_offset, idt_1_y_offset, 0])    
+rotate([0, 0, 90]) 
+bi_directional_idt(
+    c, 
+    freq, 
+    n_fingers, 
+    distance, 
+    finger_length, 
+    gap, 
+    thickness, 
+    post_scale=scale_unit,
+    has_bond_pads = true,
+    bond_pad_angle = leg_angle,
+    bond_pad_leg_width = leg_width,
+    bond_pad_leg_length = leg_length,
+    bond_pad_size = size,
+    center = true
+);
+
+translate([idt_2_x_offset, idt_2_y_offset, 0])    
+bi_directional_idt(
+    c, 
+    freq, 
+    n_fingers, 
+    distance, 
+    finger_length, 
+    gap, 
+    thickness, 
+    post_scale=scale_unit,
+    has_bond_pads = true,
+    bond_pad_angle = leg_angle,
+    bond_pad_leg_width = leg_width,
+    bond_pad_leg_length = leg_length,
+    bond_pad_size = size,
+    center = true
+);

wafer_layouts/hex_layout_idt.scad

@@ -0,0 +1,174 @@
+include <../modules/bidirectional_idt.scad>
+include <../modules/parameter_text.scad>
+include <../modules/wafer.scad>
+
+// ================= README =================
+// these are the normal parameters used by
+// each one of the layout scripts
+// however they do dont directly use them
+// and instead have thier own copy
+//
+// this was done in order to have more control
+// over each of the scripts themsevels 
+// allowing each to have even more parameters
+// and having them show up in the open scad
+// parameters window
+// ================= README =================
+
+// ================= openscad prams =================
+$fa = 1;
+$fs = 0.01;
+// ================= openscad prams =================
+
+// ================= meta =================
+SCRIPT_VERSION="0.0.1";
+// this really just need to be any mon font
+FONT="Ubuntu Sans Mono:style=Regular";
+test_number = 1;
+// scale in m
+scale_unit = 1e3;
+// ================= meta =================
+
+
+// ================= IDT =================
+substrate = "LINBO";
+// linbo
+c = 3992.0;
+// si
+// c = 3159.0;
+freq = 50.0e6;
+
+// $fs = (c/freq);
+
+// inout distance
+distance = 150;
+
+// number of finger
+n_fingers = 50;
+
+// should be 50-70
+finger_length = 60; 
+
+// for tweaking the design
+gap = 0;
+
+// for tweaking the design
+thickness = 0;
+
+has_id_number = false;
+// ================= IDT =================
+
+// ================= bond pad =================
+
+leg_length = 0.003;
+leg_width = 0.00001875;
+leg_angle = 10;
+size = 0.002;
+bond_pad_shape = "square";
+
+// ================= bond pad =================
+
+// ================= text =================
+
+info_block_offset_x=20;
+info_block_offset_y=-30;
+info_block_scale=0.3;
+title_text_size = 4;
+prop_text_size = 2.5;
+id_text_size = 1;
+
+// ================= text =================
+
+// ================= IDT Pos =================
+idt_1_x_offset = 0;
+idt_1_y_offset = 0;
+idt_2_x_offset = 0;
+idt_2_y_offset = 0;
+// ================= IDT Pos =================
+
+
+// ================= wafers =================
+wafer_size_inch = 4;
+// ================= wafers =================
+
+module params() {
+    parameter_text(
+        str("IDT ", substrate, "#", test_number),
+        [
+            str("c          (ms): ", c),
+            str("freq       (Hz): ", freq),
+            str("distance       : ", distance),
+            str("n_fingers      : ", n_fingers),
+            str("finger_length  : ", finger_length),
+            str("gap            : ", gap),
+            str("thickness      : ", thickness),
+            str("leg_length     : ", leg_length),
+            str("leg_angle      : ", leg_angle),
+            str("size           : ", size),
+            str("feat. size (mm): ", (c/freq)*1e3),
+            str("version        : ", SCRIPT_VERSION)
+        ]
+    );
+}
+
+translate([info_block_offset_x, -info_block_offset_y, 0])
+scale([info_block_scale, info_block_scale, info_block_scale])
+params();
+
+wafer(wafer_size_inch*25.4);
+
+translate([idt_1_x_offset, idt_1_y_offset, 0])    
+rotate([0, 0, 60]) 
+bi_directional_idt(
+    c, 
+    freq, 
+    n_fingers, 
+    distance, 
+    finger_length, 
+    gap, 
+    thickness, 
+    post_scale=scale_unit,
+    has_bond_pads = true,
+    bond_pad_angle = leg_angle,
+    bond_pad_leg_width = leg_width,
+    bond_pad_leg_length = leg_length,
+    bond_pad_size = size,
+    center = true
+);
+
+translate([idt_2_x_offset, idt_2_y_offset, 0])    
+rotate([0, 0, 120]) 
+bi_directional_idt(
+    c, 
+    freq, 
+    n_fingers, 
+    distance, 
+    finger_length, 
+    gap, 
+    thickness, 
+    post_scale=scale_unit,
+    has_bond_pads = true,
+    bond_pad_angle = leg_angle,
+    bond_pad_leg_width = leg_width,
+    bond_pad_leg_length = leg_length,
+    bond_pad_size = size,
+    center = true
+);
+
+translate([idt_2_x_offset, idt_2_y_offset, 0])    
+bi_directional_idt(
+    c, 
+    freq, 
+    n_fingers, 
+    distance, 
+    finger_length, 
+    gap, 
+    thickness, 
+    post_scale=scale_unit,
+    has_bond_pads = true,
+    bond_pad_angle = leg_angle,
+    bond_pad_leg_width = leg_width,
+    bond_pad_leg_length = leg_length,
+    bond_pad_size = size,
+    center = true
+);

wafer_layouts/pair_idt.scad

@@ -0,0 +1,150 @@
+include <../modules/bidirectional_idt.scad>
+include <../modules/parameter_text.scad>
+include <../modules/wafer.scad>
+
+// ================= README =================
+// these are the normal parameters used by
+// each one of the layout scripts
+// however they do dont directly use them
+// and instead have thier own copy
+//
+// this was done in order to have more control
+// over each of the scripts themsevels 
+// allowing each to have even more parameters
+// and having them show up in the open scad
+// parameters window
+// ================= README =================
+
+// ================= openscad prams =================
+$fa = 1;
+$fs = 0.01;
+// ================= openscad prams =================
+
+// ================= meta =================
+SCRIPT_VERSION="0.0.1";
+// this really just need to be any mon font
+FONT="Ubuntu Sans Mono:style=Regular";
+test_number = 1;
+// scale in m
+scale_unit = 1e3;
+// ================= meta =================
+
+
+// ================= IDT =================
+substrate = "LINBO";
+// linbo
+c = 3992.0;
+// si
+// c = 3159.0;
+freq = 50.0e6;
+
+// $fs = (c/freq);
+
+// inout distance
+distance = 50;
+
+// number of finger
+n_fingers = 50;
+
+// should be 50-70
+finger_length = 60; 
+
+// for tweaking the design
+gap = 0;
+
+// for tweaking the design
+thickness = 0;
+
+has_id_number = false;
+// ================= IDT =================
+
+// ================= bond pad =================
+leg_length = 0.003;
+leg_width = 0.00001875;
+leg_angle = 10;
+size = 0.002;
+bond_pad_shape = "square";
+// ================= bond pad =================
+
+// ================= text =================
+info_block_offset_x=20;
+info_block_offset_y=-15;
+info_block_scale=0.3;
+title_text_size = 4;
+prop_text_size = 2.5;
+id_text_size = 1;
+// ================= text =================
+
+// ================= IDT Pos =================
+idt_1_x_offset = -5;
+idt_1_y_offset = 0;
+idt_2_x_offset = 5;
+idt_2_y_offset = 0;
+// ================= IDT Pos =================
+
+
+// ================= wafers =================
+wafer_size_inch = 4;
+// ================= wafers =================
+
+module params() {
+    parameter_text(
+        str("IDT ", substrate, "#", test_number),
+        [
+            str("c          (ms): ", c),
+            str("freq       (Hz): ", freq),
+            str("distance       : ", distance),
+            str("n_fingers      : ", n_fingers),
+            str("finger_length  : ", finger_length),
+            str("gap            : ", gap),
+            str("thickness      : ", thickness),
+            str("leg_length     : ", leg_length),
+            str("leg_angle      : ", leg_angle),
+            str("size           : ", size),
+            str("feat. size (mm): ", (c/freq)*1e3),
+            str("version        : ", SCRIPT_VERSION)
+        ]
+    );
+}
+
+translate([info_block_offset_x, -info_block_offset_y, 0])
+scale([info_block_scale, info_block_scale, info_block_scale])
+params();
+
+wafer(wafer_size_inch*25.4);
+
+translate([idt_1_x_offset, idt_1_y_offset, 0])    
+bi_directional_idt(
+    c, 
+    freq, 
+    n_fingers, 
+    distance, 
+    finger_length, 
+    gap, 
+    thickness, 
+    post_scale=scale_unit,
+    has_bond_pads = true,
+    bond_pad_angle = leg_angle,
+    bond_pad_leg_width = leg_width,
+    bond_pad_leg_length = leg_length,
+    bond_pad_size = size,
+    center = true
+);
+
+translate([idt_2_x_offset, idt_2_y_offset, 0])    
+bi_directional_idt(
+    c, 
+    freq, 
+    n_fingers, 
+    distance, 
+    finger_length, 
+    gap, 
+    thickness, 
+    post_scale=scale_unit,
+    has_bond_pads = true,
+    bond_pad_angle = leg_angle,
+    bond_pad_leg_width = leg_width,
+    bond_pad_leg_length = leg_length,
+    bond_pad_size = size,
+    center = true
+);

wafer_layouts/quadrant_array.scad

@@ -0,0 +1,220 @@
+include <../modules/bidirectional_idt.scad>
+include <../modules/wafer.scad>
+include <../modules/parameter_text.scad>
+// include <../pramas.scad>
+
+
+// ================= openscad prams =================
+$fa = 1;
+$fs = 0.01;
+// ================= openscad prams =================
+
+// ================= meta =================
+SCRIPT_VERSION="0.0.1";
+// this really just need to be any mon font
+FONT="Ubuntu Sans Mono:style=Regular";
+test_number = 1;
+// scale in m
+scale_unit = 1e3;
+// ================= meta =================
+
+
+// ================= IDT =================
+substrate = "LINBO";
+// linbo
+c = 3992.0;
+// si
+// c = 3159.0;
+freq = 50.0e6;
+
+// $fs = (c/freq);
+
+// inout distance
+distance = 50;
+
+// number of finger
+n_fingers = 50;
+
+// should be 50-70
+finger_length = 60; 
+
+// for tweaking the design
+gap = 0;
+
+// for tweaking the design
+thickness = 0;
+
+has_id_number = true;
+// ================= IDT =================
+
+// ================= bond pad =================
+leg_length = 0.003;
+leg_width = 0.00001875;
+leg_angle = 10;
+size = 0.002;
+bond_pad_shape = "square";
+// ================= bond pad =================
+
+// ================= text =================
+info_block_offset_x=7;
+info_block_offset_y=30;
+info_block_scale=0.3;
+title_text_size = 4;
+prop_text_size = 2.5;
+id_text_size = 1;
+// ================= text =================
+
+// ================= array spacings =================
+number_of_idts_per_quadrent=4;
+idt_x_spacing = 10;
+idt_y_spacing = 12.5;
+// ================= array spacings =================
+
+
+// ================= wafers =================
+wafer_size_inch = 4;
+// ================= wafers =================
+
+module params() {
+    parameter_text(
+        str("IDT ", substrate, "#", test_number),
+        [
+            str("c          (ms): ", c),
+            str("freq       (Hz): ", freq),
+            str("distance       : ", distance),
+            str("n_fingers      : ", n_fingers),
+            str("finger_length  : ", finger_length),
+            str("gap            : ", gap),
+            str("thickness      : ", thickness),
+            str("leg_length     : ", leg_length),
+            str("leg_angle      : ", leg_angle),
+            str("size           : ", size),
+            str("feat. size (mm): ", (c/freq)*1e3),
+            str("version        : ", SCRIPT_VERSION)
+        ]
+    );
+}
+
+
+
+translate([info_block_offset_x, -info_block_offset_y, 0]) {
+rotate([0, 0, -90]) 
+scale([info_block_scale, info_block_scale, info_block_scale]) {
+    params();
+}
+}
+
+rotate([0, 0, 180])
+translate([info_block_offset_x, -info_block_offset_y, 0]) {
+rotate([0, 0, -90]) 
+scale([info_block_scale, info_block_scale, info_block_scale]) {
+    params();
+}
+}
+
+
+
+if ($preview)
+wafer(wafer_size_inch*0.0254*scale_unit);
+// echo(str("number_of_idts_per_quadrent : ", number_of_idts_per_quadrent));
+for (i=[0:number_of_idts_per_quadrent-1]) {
+    translate([idt_x_spacing/4, 0, 0]) {
+    translate([i * idt_x_spacing, idt_y_spacing/2, 0]) {
+            bi_directional_idt(
+                c, 
+                freq, 
+                n_fingers, 
+                distance, 
+                finger_length, 
+                gap, 
+                thickness, 
+                post_scale=scale_unit,
+                has_bond_pads = true,
+                bond_pad_angle = leg_angle,
+                bond_pad_leg_width = leg_width,
+                bond_pad_leg_length = leg_length,
+                bond_pad_size = size,
+                has_id = has_id_number,
+                id_number = i
+            );
+    }
+    translate([i * idt_x_spacing, -idt_y_spacing/2, 0]) {
+        scale([1, -1, 1]) {
+            bi_directional_idt(
+                c, 
+                freq, 
+                n_fingers, 
+                distance, 
+                finger_length, 
+                gap, 
+                thickness, 
+                post_scale=scale_unit,
+                has_bond_pads = true,
+                bond_pad_angle = leg_angle,
+                bond_pad_leg_width = leg_width,
+                bond_pad_leg_length = leg_length,
+                bond_pad_size = size,
+                has_id = has_id_number,
+                id_number = i + number_of_idts_per_quadrent,
+                id_flip_dir = [1, -1, -1]
+            );
+       }
+    }
+    }
+
+    scale([-1, 1, 1])
+    translate([idt_x_spacing/4, 0, 0]) {
+        
+    translate([i * idt_x_spacing, idt_y_spacing/2, 0]) {
+            bi_directional_idt(
+                c, 
+                freq, 
+                n_fingers, 
+                distance, 
+                finger_length, 
+                gap, 
+                thickness, 
+                post_scale=scale_unit,
+                has_bond_pads = true,
+                bond_pad_angle = leg_angle,
+                bond_pad_leg_width = leg_width,
+                bond_pad_leg_length = leg_length,
+                bond_pad_size = size, 
+                has_id = has_id_number,
+                id_number = i + number_of_idts_per_quadrent*2,
+                id_flip_dir = [-1, 1, 1]
+            );
+    }
+    translate([i * idt_x_spacing, -idt_y_spacing/2, 0]) {
+        scale([1, -1, 1]) {
+            bi_directional_idt(
+                c, 
+                freq, 
+                n_fingers, 
+                distance, 
+                finger_length, 
+                gap, 
+                thickness, 
+                post_scale=scale_unit,
+                has_bond_pads = true,
+                bond_pad_angle = leg_angle,
+                bond_pad_leg_width = leg_width,
+                bond_pad_leg_length = leg_length,
+                bond_pad_size = size, 
+                has_id = has_id_number,
+                id_number = i + number_of_idts_per_quadrent*3,
+                id_flip_dir = [-1, -1, 1]
+            );
+        }
+    }
+    }
+}
+
+// bond_pad(
+//     leg_length = 0.0075, 
+//     leg_width = 0.00001875,
+//     leg_angle = 20, 
+//     size = 0.0075, 
+//     bond_pad_shape = "square", 
+//     post_scale = scale_unit
+// );

wafer_layouts/single_idt.scad

@@ -0,0 +1,130 @@
+include <../modules/bidirectional_idt.scad>
+include <../modules/parameter_text.scad>
+include <../modules/wafer.scad>
+
+// ================= README =================
+// these are the normal parameters used by
+// each one of the layout scripts
+// however they do dont directly use them
+// and instead have thier own copy
+//
+// this was done in order to have more control
+// over each of the scripts themsevels 
+// allowing each to have even more parameters
+// and having them show up in the open scad
+// parameters window
+// ================= README =================
+
+// ================= openscad prams =================
+$fa = 1;
+$fs = 0.01;
+// ================= openscad prams =================
+
+// ================= meta =================
+SCRIPT_VERSION="0.0.1";
+// this really just need to be any mon font
+FONT="Ubuntu Sans Mono:style=Regular";
+test_number = 1;
+// scale in m
+scale_unit = 1e3;
+// ================= meta =================
+
+
+// ================= IDT =================
+substrate = "LINBO";
+// linbo
+c = 3992.0;
+// si
+// c = 3159.0;
+freq = 50.0e6;
+
+// $fs = (c/freq);
+
+// inout distance
+distance = 50;
+
+// number of finger
+n_fingers = 50;
+
+// should be 50-70
+finger_length = 60; 
+
+// for tweaking the design
+gap = 0;
+
+// for tweaking the design
+thickness = 0;
+
+has_id_number = false;
+// ================= IDT =================
+
+// ================= bond pad =================
+leg_length = 0.003;
+leg_width = 0.00001875;
+leg_angle = 10;
+size = 0.002;
+bond_pad_shape = "square";
+// ================= bond pad =================
+
+// ================= text =================
+info_block_offset_x=20;
+info_block_offset_y=-15;
+info_block_scale=0.3;
+title_text_size = 4;
+prop_text_size = 2.5;
+id_text_size = 1;
+// ================= text =================
+
+// ================= IDT Pos =================
+idt_x_offset = 0;
+idt_y_offset = 0;
+// ================= IDT Pos =================
+
+// ================= wafers =================
+wafer_size_inch = 4;
+// ================= wafers =================
+
+module params() {
+    parameter_text(
+        str("IDT ", substrate, "#", test_number),
+        [
+            str("c          (ms): ", c),
+            str("freq       (Hz): ", freq),
+            str("distance       : ", distance),
+            str("n_fingers      : ", n_fingers),
+            str("finger_length  : ", finger_length),
+            str("gap            : ", gap),
+            str("thickness      : ", thickness),
+            str("leg_length     : ", leg_length),
+            str("leg_angle      : ", leg_angle),
+            str("size           : ", size),
+            str("feat. size (mm): ", (c/freq)*1e3),
+            str("version        : ", SCRIPT_VERSION)
+        ]
+    );
+}
+
+translate([info_block_offset_x, -info_block_offset_y, 0])
+scale([info_block_scale, info_block_scale, info_block_scale])
+params();
+
+wafer(wafer_size_inch*25.4);
+
+translate([0, 0, 0])
+bi_directional_idt(
+    c, 
+    freq, 
+    n_fingers, 
+    distance, 
+    finger_length, 
+    gap, 
+    thickness, 
+    post_scale=scale_unit,
+    has_bond_pads = true,
+    bond_pad_angle = leg_angle,
+    bond_pad_leg_width = leg_width,
+    bond_pad_leg_length = leg_length,
+    bond_pad_size = size,
+    center = true,
+    echo_stats = true
+);