1. Dada ti PCB: OSP, HASL, HASL-free Lead, Immersion Tin, ENIG, Immersion Silver, Lile gold plating, Plating gold for whole board, gold finger, ENEPIG… OSP: kekere iye owo, ti o dara solderability, simi ipamọ awọn ipo, igba kukuru, imọ-ẹrọ ayika, alurinmorin to dara, dan… HASL: nigbagbogbo o jẹ m…
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