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PCB是開窗還是蓋油?想搞懂過孔工藝，看這篇就夠了

3.過孔塞油過孔塞油，即在PCB生產時先用鋁片將阻焊油墨塞進過孔裏面，再整板印阻焊油，所有過孔都不會透光。目的是將過孔堵住，以防孔裏藏錫珠，因為錫珠遇到高溫溶解會流到焊盤上導致短路，尤其是BGA上。如...

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