ENIG FR4 PCB Production Record #FR4-20260430-040
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| PCB Type | FR4 PCB | Quantity | 20 pcs |
| Layers | 12 Layers | Board Type | Single PCB |
| Dimensions | 138.43 x 147.57 mm | Copper Weight | 0.5oz |
| Thickness | 1.6 mm | Min Track / Spacing | 5/5mil |
| Surface Finish | ENIG (Immersion Gold) | Min Hole Size | 0.2mm |
| Solder Mask | Green | Silkscreen | White |
| Stack-up | Custom | Impedance Control | Yes |
This multilayer FR-4 board featured impedance control requirements with varying copper thicknesses noted in the stackup. Production proceeded with the supplied gerber files, ignoring supplementary tgz and PDF documents after confirmation. The order included customer-requested production serial numbering on the top layer silkscreen and adjustments for via mask openings on the bottom layer to align with actual data.
DFM review highlighted inconsistencies between the order specifications and provided files, particularly regarding via treatments and stackup details. Proposed production stackup was shared to accommodate real manufacturing capability, requiring trace width adjustments on impedance lines to meet target values while maintaining signal integrity. Copper thickness variations across layers were reconciled through calculation and customer approval before proceeding to lamination.
All file confirmations and modifications were completed prior to release, ensuring smooth execution through etching, plating, and testing phases. The boards were delivered with verified impedance performance. Details on the impedance line width compensation are covered in the engineering case study.
FR4 material with ENIG finish provides balanced electrical performance, shelf life, and assembly compatibility for industrial and high-reliability electronics.
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| Order ID | PCB Type | Layers | Dimensions | Solder Mask | Surface Finish | Quantity | Action |
|---|---|---|---|---|---|---|---|
| FR4-20260630-014 | FR4 PCB | 2 | 126 x 145 | Green | ENIG (Immersion Gold) | 10 | View detail |
| FR4-20260529-059 | FR4 PCB | 2 | 147.3 x 53.8 | Green | ENIG (Immersion Gold) | 5 | View detail |
| FR4-20260520-046 | FR4 PCB | 2 | 94.21 x 275 | Green | ENIG (Immersion Gold) | 75 | View detail |
