3.2. PCB characteristics¶
| Layers | 2 |
| PCB Material | FR-4 |
| Color | Green |
| Silk Screen | White |
| Board Thickness | 1.6 mm |
| Thickness Tolerance | ± 10% |
| PCB track width | 16 mil (40 mil for VCC and GND lines) |
| Minimum silkscreen text size | 32 mil |
| Layer Copper Thickness | 1 oz (35 µm) |
| Outline Tolerance (Mechanical) | ±0.20 mm |
| Solder Mask Type | Photosensitive ink |
| Solder Mask Thickness | 15 µm |
| Surface Finish | HASL |