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wjs8848:图片看不太清楚地说,方便的话上传未插件的PCB顶底面特写和连接器底部图...纯粹的非金属化孔多半是透气孔(利于排汽,通孔透锡)和定位孔(连接器本体销柱匹配,加固用)。如是金属化通孔VIA,多为内层电路连接散热用... (2014-10-27 20:30)
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panda-liu:孔是卸压的、单边孔引起焊点两侧压力不平衡——就会有侧向作用力产生、有侧向力两焊点之间的锡珠就容易被赶出、顺带防桥接...,卸压孔有多种玩法、讲究个流体压力不对称...,呵呵。 (2014-10-27 22:58)