| Parameter | Value | Parameter | Value |
|---|---|---|---|
| PCB Type | FR4 PCB | Quantity | 20 pcs |
| Layers | 2 Layers | Board Type | Panel PCB |
| Dimensions | 105.2 x 135.2 mm | Copper Weight | 1oz |
| Thickness | 1 mm | Min Track / Spacing | 6/6mil↑ |
| Surface Finish | HASL Lead Free | Min Hole Size | 0.3mm↑ |
| Solder Mask | Green | Silkscreen | None |
| Stack-up | Default | Impedance Control | No |
This 2-layer FR-4 board (105.2 × 135.2 mm, 1.0 mm thick, TG150) was produced as 3×4 panels for 240 pieces total. Lead-free HASL surface finish was applied over 6 mil line/space geometry with green solder mask and no silkscreen. The thinner board construction and customer self-panelization required close attention to tab strength and via treatment during a 1-day turnaround.
DFM coordination resolved several specification conflicts. Dimensional tolerance was adjusted from customer ±0.1 mm to standard ±0.15 mm capability. Gerber files showed mixed via tenting and opening instructions that were clarified against the noted cover oil requirement. Bottom layer solder mask period marking and inconsistencies between single-piece and panel files were aligned, while small connection tabs were enlarged with added stamp holes to prevent premature breakage during depanelization.
All adjustments were implemented before production release, allowing reliable HASL application and clean panel separation. The urgent order completed with 100% flying probe testing and full quality documentation including electrical reports and outgoing inspection records. Boards met dimensional and functional requirements for customer assembly.
2 layer FR4 PCBs deliver cost-effective solutions for most electronic designs. Their simple structure enables consistent quality and efficient production cycles.
Real Engineering Queries (EQ) and DFM issues for 2 Layer FR4 PCB (double-sided boards) from actual production reviews. Learn how to avoid common problems with via treatment, silkscreen on pads, solder mask openings, hole attributes, board edge clearance, and other frequent design pitfalls.
| 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 |
| FR4-20260628-010 | FR4 PCB | 2 | 60 x 120 | Green | HASL Lead Free | 5 | View detail |
| FR4-20260619-010 | FR4 PCB | 2 | 121 x 121 | Green | HASL Lead Free | 50 | View detail |