4 Layer FR4 PCB Production Record #FR4-20260828-051

We produced a set of five 4-layer FR4 circuit boards for this order, each measuring 100 x 150 mm with a standard 1.6 mm thickness and 1 oz copper layers. Specified with 10/10 mil track and spacing as well as 0.3 mm minimum hole size, the boards represented conventional geometry that permitted straightforward yet careful processing at every stage. Our engineering team reviewed the files thoroughly prior to material preparation, inner layer imaging, and etching to maintain exact feature dimensions.

Subsequent steps included precise layer stack alignment and high-pressure lamination to create a solid multilayer structure. Green soldermask and white silkscreen were applied, followed by the molten solder coating and hot air leveling process that delivered a consistent HASL Lead Free finish across all surfaces. This surface treatment ensures excellent wettability during customer assembly while remaining environmentally compliant.

All five boards then passed comprehensive electrical testing, verifying netlist accuracy and isolation. The complete manufacturing sequence took 3.2 days, yielding uniform results that reflect the reliability achievable with standard 4-layer FR4 PCB production using established methods. The small quantity allowed focused attention to detail without compromising on process controls.

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