Wholesale FR4 Single-Sided PCB With HASL Surface Finish

this custom pcb service is built around one thing: getting your boards to assemble cleanly and run reliably in real products. fr-4 is the go-to choice for strength and heat tolerance, while fr-1 and cem1 offer cost-efficient options for high-volume consumer and appliance designs. the image highlights common surface treatment choices—hasl for robust, economical solderability; immersion gold for fine-pitch pads and consistent joint quality; and osp for a clean copper-protection layer when you want smooth assembly and controlled cost.

for b2b programs, we handle the full path from engineering review to mass production: stack-up and dfx checks, controlled thickness/copper weight, impedance control when required, and process options like panelization, fiducials, and test points to improve yield. each lot can include aoI, flying probe/e-test, and tailored packaging so your boards arrive ready for your smt line and your customers’ expectations.