new wafer layout and update the comments on some others

wafer_layouts/gird_array_idt.scad

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+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 =================
+
+// min angle
+$fa = 0.1;
+
+// min size
+$fs = 0.01;
+// ================= openscad prams =================
+
+// ================= meta =================
+// version number of the current script
+SCRIPT_VERSION="0.0.1";
+
+// font for layout
+FONT="Ubuntu Sans Mono:style=Regular";
+
+// the test number ref number for this set of IDTs
+test_number = 1;
+
+// this is needed due to the min size value
+// a pre scaler for the given values
+scale_unit = 1e3;
+
+// ================= meta =================
+
+
+// ================= IDT =================
+
+// the underlying substrate
+substrate = "SI";
+
+// linbo
+// the aoucstice wave speed in the substrate
+c = 3992.0;
+// si
+// c = 3159.0;
+
+// the target frequency of the IDT
+freq = 345.0e6;
+
+// the distance between the input and output IDT
+// should be between 100-200
+distance = 50;
+
+// the number of fingers the IDT has
+n_fingers = 50;
+
+// the length of the figure or aperture should be 50-70
+finger_length = 60; 
+
+// the gap between both sides of the IDT (should be used for tweaking)
+gap = 0;
+
+// the thickness of the wire the connects all the fingers
+thickness = 0;
+
+// adds an ID number to an IDT, useful if you have multiple on a wafer
+has_id_number = true;
+// ================= IDT =================
+
+// ================= bond pad =================
+
+// the length of the bond pad leg from the edge of the IDT to the center of the bond pad
+leg_length = 0.001;
+
+// the width of the leg
+leg_width = 0.00001875;
+
+// the angle the leg comes off from the IDT,
+// positive angle means the leg is angled away
+// negitive angle means the leg is angled inwards
+leg_angle = 10;
+
+// the size of the bond pad
+size = 0.00075;
+
+// the shape of the bond pad (not implemented)
+bond_pad_shape = "square";
+
+// ================= bond pad =================
+
+// ================= text =================
+
+info_block_offset_x=28;
+info_block_offset_y=-5;
+// total scale of infoblock
+info_block_scale=0.3;
+
+// the text size of the heading in the info block
+title_text_size = 4;
+
+// the size of all the sub items in the info block
+prop_text_size = 2.5;
+
+// the size of the ID numbers in on the IDTS
+id_text_size = 0.5;
+
+// ================= text =================
+
+// ================= wafers =================
+// the size of the wafer in inchs (why inch and not metric like everything else because its standard)
+wafer_size_inch = 4;
+// ================= wafers =================
+
+// ================= # IDTS =================
+
+rows = 10;
+cols = 10;
+spacing_x = 4;
+spacing_y = 7;
+
+// ================= # IDTS =================
+
+
+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(4*0.0254*scale_unit);
+
+translate([-spacing_x*rows/2, -spacing_y*cols/2, 0])
+for (x=[0:rows]) {
+    for (y=[0:cols]) {
+        translate([spacing_x*x, spacing_y*y, 0])
+        bi_directional_idt(
+            c, 
+            freq, 
+            n_fingers, 
+            distance, 
+            finger_length, 
+            gap, 
+            thickness, 
+            post_scale=scale_unit,
+            center = true,
+            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_translate = [1.7, -0.5, 0],
+            id_rot = [0, 0, 90],
+            id_number = x*rows + y
+        );
+    
+    }
+}
+
+