4 Layer FR4 PCB Production Record #FR4-20260306-083
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| PCB Type | FR4 PCB | Quantity | 100 pcs |
| Layers | 4 Layers | Board Type | Panel PCB |
| Dimensions | 233 x 179 mm | Copper Weight | 1oz |
| Thickness | 1.6 mm | Min Track / Spacing | 6/6mil↑ |
| Surface Finish | ENIG (Immersion Gold) | Min Hole Size | 0.2mm |
| Solder Mask | Green | Silkscreen | White |
| Stack-up | Custom | Impedance Control | No |
This 4-layer FR-4 board measured 233 × 179 mm with 1.6 mm thickness, TG130 material, and asymmetric copper weights of 0.5 oz inner / 1 oz outer. Produced as 400 pieces in 2×2 panels for 100 sets, the order used ENIG surface finish (1 µin gold), green solder mask, and white silkscreen. Minimum holes were 0.2 mm with standard 6 mil line/space, high hole density of approximately 86 800 holes/m², and 8 mm process edges on all sides supporting V-cut separation. The 4-day schedule included 100% flying probe testing.
DFM review resolved multiple data-source conflicts. The supplied package contained numerous files; production was confirmed to follow the specific PCB file indicated by the arrow. Board outline was locked to the GM3 layer. A slot feature showed inconsistency between the drill layer and GM1 layer, requiring explicit selection of the governing data set. As a return order, the complete production process package from the prior job was adopted and the original files disregarded for fabrication purposes.
Confirmed file prioritization, outline reference, and slot definition were implemented prior to release. The boards achieved consistent ENIG plating and registration across the 4-layer stack within the accelerated timeline. Full electrical test reports and quality certificates accompanied the shipment, confirming the panels met the specified mechanical and electrical requirements.
Discover how AIVON manufactures 4 Layer FR4 PCBs, including multilayer stackup design, layer alignment control, fabrication processes, manufacturing challenges, and real production experience from customer orders.
Real multilayer FR4 PCB CAM review cases covering stack-up confirmation, impedance control, copper balance, via tenting, and edge clearance EQs. Discover practical DFM best practices for 4-layer and higher boards to reduce engineering queries, prevent warpage, and improve first-pass yield.
| Order ID | PCB Type | Layers | Dimensions | Solder Mask | Surface Finish | Quantity | Action |
|---|---|---|---|---|---|---|---|
| FR4-20260717-013 | FR4 PCB | 4 | 43.81 x 86.99 | Black | HASL Lead Free | 10 | View detail |
| FR4-20260708-062 | FR4 PCB | 4 | 462.57 x 205 | Matte Black | ENIG (Immersion Gold) | 5 | View detail |
| FR4-20260630-014 | FR4 PCB | 2 | 126 x 145 | Green | ENIG (Immersion Gold) | 10 | View detail |
