LFBGA封装的芯片的PCB设计规则 最大过孔直径焊盘有阻焊〔Solder MaskDefined Land Pad〕焊盘无阻焊〔Non-solder MaskDefined Land Pad〕线宽/间距0.107mm(4.2mil)0.150mm(5.9mil)过孔钻孔直径0.23 – 0.25 mm(9 – 10 mil)0.35 – 0.38 mm(14 – 15 mil)孔化前直径0