4 Layer Flexible PCB Production Record #FPC-20260509-056
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| PCB Type | Flexible PCB | Quantity | 50 pcs |
| Layers | 4 Layers | Board Type | Single PCB |
| Dimensions | 86 x 46 mm | Copper Weight | 1/2OZ |
| Thickness | 0.2 mm | Min Track / Spacing | 6/6mil↑ |
| Surface Finish | ENIG (Immersion Gold) | Min Hole Size | 0.3mm↑ |
| Solder Mask | Yellow | Silkscreen | White |
| Material | Rolled Copper | Stiffener | PI Stiffener |
This order consisted of 50 pieces of 4-layer flexible PCBs built on polyimide with rolled copper foil. Measuring 86 × 46 mm and only 0.2 mm thick, the boards featured 0.5 oz copper layers, yellow soldermask, white silkscreen, PI stiffeners, and an immersion gold ENIG surface finish. With a minimum track spacing of 6/6 mil and hole size of 0.3 mm, the design called for precise material preparation and layer alignment during high-pressure lamination to achieve reliable multilayer registration on this thin flexible substrate.
Production followed a sequence of polyimide material handling, inner layer imaging, circuit etching, and coverlay lamination before solder mask application. Electroless nickel and immersion gold deposition provided a flat, solderable surface while PI stiffeners were selectively bonded to reinforce connector areas without restricting flex performance.
Dynamic flex testing and full electrical testing confirmed endurance and netlist integrity across the full batch. The run was completed in 17.8 days, delivering consistent boards that met the mechanical and electrical requirements of this flexible circuit application.
Four layer flex circuits enable higher routing density and signal performance in compact, dynamic applications across medical, aerospace, and industrial sectors.
Learn about flexible PCB manufacturing equipment designed for handling thin, bendable substrates. Gain insights into laser cutting, adhesive bonding, and testing methods to ensure precision and reliability in production.
| Order ID | PCB Type | Layers | Dimensions | Solder Mask | Surface Finish | Quantity | Action |
|---|---|---|---|---|---|---|---|
| FPC-20260707-032 | Flexible PCB | 4 | 157.2 x 38.6 | Yellow | ENIG (Immersion Gold) | 125 | View detail |
| FPC-20260526-023 | Flexible PCB | 4 | 50 x 75 | Black | ENIG (Immersion Gold) | 5 | View detail |
| FPC-20260516-007 | Flexible PCB | 3 | 76.2 x 457.2 | Yellow | ENIG (Immersion Gold) | 5 | View detail |
