4 Layer Rigid-Flex PCB Production Record #RFP-20260401-039
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| PCB Type | Rigid-Flex PCB | Quantity | 5 pcs |
| Layers | 4 Layers | Board Type | Single PCB |
| Dimensions | 138 x 128 mm | Copper Weight | 1OZ |
| Thickness | 1.6 mm | Min Track / Spacing | 6/6mil↑ |
| Surface Finish | ENIG (Immersion Gold) | Min Hole Size | 0.3mm↑ |
| Solder Mask | Green | Silkscreen | White |
This 4-layer rigid-flex order measured 138 × 128 mm with a finished thickness of 1.6 mm and required five pieces. The design specified ENIG surface finish at 1.0 µm, 0.3 mm drilled holes, and via cover oil. Line and space were held at 6 mil. Inner-layer base copper was set at 0.5 oz and outer-layer finished copper at 1 oz, with hole wall copper at 22 µm. Shengyi material was used for both rigid and flex sections after confirming the stack-up and soft-hard boundary location.
During CAM review, the supplied gerber showed open windows on vias, board-outline size mismatch, right-angle corners on the flex outline, and several pads positioned too close to the final edge. The character frame line placed on the flex region was also removed. All open windows were closed to achieve via cover oil, the outline corners were filleted to R0.5 mm, external objects were deleted, and trace anomalies were corrected on the working files. These changes eliminated the risk of exposed copper after routing and prevented potential flex cracking at sharp corners. The same via cover oil and outline fillet adjustments applied here had been validated on prior rigid-flex builds.
After customer confirmation of the revised working files, the boards were released to production under IPC Class 2 criteria. Flying-probe testing confirmed electrical integrity on all five pieces, and the lot was shipped complete within the 24-day window with the required test reports and certificates.
| Order ID | PCB Type | Layers | Dimensions | Solder Mask | Surface Finish | Quantity | Action |
|---|---|---|---|---|---|---|---|
| RFP-20260427-074 | Rigid-Flex PCB | 4 | 131.97 x 115.05 | Green | ENIG (Immersion Gold) | 260 | View detail |
| RFP-20260312-007 | Rigid-Flex PCB | 4 | 46 x 16 | Green | ENIG (Immersion Gold) | 20 | View detail |
| RFP-20251223-007 | Rigid-Flex PCB | 4 | 133.69 x 160.84 | Matte Black | ENIG (Immersion Gold) | 10 | View detail |
