Manufacturing Reports Test Coupon v1
The Manufacturing Reports Test Coupon v1 was designed specifically for the evaluation of printed circuit boards. There are many features designed into the board exclusively to allow measurements that normally wouldn’t be possible on a conventional PCB. At the most basic level, the MRTCv1 is 75mm x 50mm two layer design, with solder mask and silk screen on both sides, and board orders submitted with the MRTC are specified with a stackup of 1oz copper with a HASL surface finish.
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- MRTC v1 PCB Front Render
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- MRTC v1 PCB Back Render
Mechanical Features
| Feature | Purpose | Dimension | Image |
|---|---|---|---|
| Board X Dimension | Measurement of outer board dimension. | 75mm | |
| Board Y Dimension | Measurement of outer board dimension. | 50mm | |
| M5 Clearance Holes | Measurement of internal milled feature. | 5.3mm |  |
| Internal Slots | Determine if the fab will mill them. Measurement of non-circular feature. | 1mm across |  |
Copper Features
| Feature | Purpose | Dimension | Image |
|---|---|---|---|
| Exposed Copper Via Stitching In Heatsink | Allows large scale inspection of surface finish. Examined for solder wicking through vias. | N/A |  |
| Exposed Copper Fingers | Measurement of Copper Thickness | Pads separated to allow measurement with calipers. Expected 1.4 thou |  |
| Exposed copper traces | Measurement of trace width | 20 / 15 / 10 / 9 / 8 / 7 / 6 mil |  |
| Micro USB Footprint | Inspection of plated slots | N/A |  |
| QFN Footprint | Inspection of 0.5mm pin pitch footprint | N/A |  |
| QFP Footprint | Inspection of quad flat pack for offset issues | N/A |  |
| 0201 Footprint | Inspection of sub-millimeter passive footprint | N/A |  |
Solder Mask Features
| Feature | Purpose | Dimension | Image |
|---|---|---|---|
| Large Mask Relief | Evaluation of feature reproduction and allows trace width measurement | 20mm x 12mm |  |
| Solder Mask over Via Stitching | Evaluation of uniformity of solder mask over via grid. | N/A |  |
| Front and Back Mask Relief over Copper Fingers | Measurement of copper thickness | 15mm x 12mm | |
Silkscreen Features
| Feature | Purpose | Dimension w x h x line (mm) | Image |
|---|---|---|---|
| Various Font Sizes | Evaluation of small font reproduction. | C1 = 3 x 3 x 0.025 R1 = 2 x 2 x 0.0125 R2 = 1 x 1 x 0.025 R3 = 1 x 1 x 0.0125 C2 = 1 x 1 x 0.015 * R4 = 1 x 1 x 0.0625 * default |  |
| Board Name | Evaluation of large font reproduction | 2 x 2 x 0.5 |  |
| QR Code | Evaluation of artwork reproduction | 10 x 10 x 0.3 |  |
| Silk Over Traces | Evaluation of silk printing over varying Z height | 1 x 1 x 0.15 |  |
