new wafer layout and update the comments on some others

wafer_layouts/single_idt.scad

@@ -15,75 +15,121 @@ include <../modules/wafer.scad>
 // parameters window
 // ================= README =================
 
+
 // ================= openscad prams =================
-$fa = 1;
+
+// min angle
+$fa = 0.1;
+
+// min size
 $fs = 0.01;
 // ================= openscad prams =================
 
 // ================= meta =================
+// version number of the current script
 SCRIPT_VERSION="0.0.1";
-// this really just need to be any mon font
+
+// font for layout
 FONT="Ubuntu Sans Mono:style=Regular";
+
+// the test number ref number for this set of IDTs
 test_number = 1;
-// scale in m
+
+// this is needed due to the min size value
+// a pre scaler for the given values
 scale_unit = 1e3;
+
 // ================= meta =================
 
-
 // ================= IDT =================
-substrate = "LINBO";
+
+// the underlying substrate
+substrate = "SI";
+
 // linbo
+// the aoucstice wave speed in the substrate
 c = 3992.0;
 // si
 // c = 3159.0;
-freq = 50.0e6;
 
-// $fs = (c/freq);
+// the target frequency of the IDT
+freq = 10.0e6;
 
-// inout distance
+// the distance between the input and output IDT
+// should be between 100-200
 distance = 50;
 
-// number of finger
+// the number of fingers the IDT has
 n_fingers = 50;
 
-// should be 50-70
-finger_length = 60; 
+// the length of the figure or aperture should be 50-70
+finger_length = 50; 
 
-// for tweaking the design
+// the gap between both sides of the IDT (should be used for tweaking)
 gap = 0;
 
-// for tweaking the design
+// 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 = false;
 // ================= 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 = 0.003;
+
+// 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 = 0.002;
+
+// the shape of the bond pad (not implemented)
 bond_pad_shape = "square";
+
 // ================= bond pad =================
 
 // ================= text =================
-info_block_offset_x=20;
-info_block_offset_y=-15;
+
+info_block_offset_x=25;
+info_block_offset_y=10;
+// 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 = 1;
+
 // ================= text =================
 
-// ================= IDT Pos =================
-idt_x_offset = 0;
-idt_y_offset = 0;
-// ================= IDT Pos =================
-
 // ================= wafers =================
+// the size of the wafer in inchs (why inch and not metric like everything else because its standard)
 wafer_size_inch = 4;
 // ================= wafers =================
 
+
+
+// ================= IDT Pos =================
+
+// the x offset of the IDT from the center
+idt_x_offset = 0;
+// the y offset of the IDT from the center
+idt_y_offset = 0;
+
+// ================= IDT Pos =================
+
 module params() {
     parameter_text(
         str("IDT ", substrate, "#", test_number),
@@ -98,7 +144,7 @@ module params() {
             str("leg_length     : ", leg_length),
             str("leg_angle      : ", leg_angle),
             str("size           : ", size),
-            str("feat. size (mm): ", (c/freq)*1e3),
+            str("feat. size (mm): ", (c/freq)*scale_unit),
             str("version        : ", SCRIPT_VERSION)
         ]
     );