4 Layer FR4 PCB Production Record #FR4-20260703-002

This production record covered five standard 4-layer FR4 PCBs, each 35 × 72 mm with 1.6 mm thickness and 1 oz copper weight. The design used 6/6 mil trace and spacing with 0.3 mm minimum holes, conventional parameters that allow stable multilayer construction without tight-geometry adjustments. A custom stackup was followed exactly, paired with green solder mask, white silkscreen, and HASL Lead Free finish.

Manufacturing began with engineering review of the layer files, followed by material preparation, inner layer imaging, and circuit imaging & etching. Layer stack alignment and high pressure lamination bonded the cores reliably. Solder mask application, molten solder coating, and hot air leveling produced an even, lead-free surface. The small quantity and straightforward specifications permitted efficient sequencing from lamination through final testing within 2.6 days.

Electrical testing verified continuity on all five boards, confirming consistent results that match the supplied data. The completed order left the line ready for immediate assembly, reflecting steady process control for standard 4-layer FR4 PCB work with HASL Lead Free.

This order also received positive feedback from the customer regarding the consistent quality and reliable delivery. View the full customer review→