鉆孔都有哪些花樣玩法?【萬贏體育】

有PCB的地方就有Via的不存在:有所不同層上的走線要靠via來相連、SIP/DIPPCB的元器件要靠via來相同、電源風扇必不可少via……via的種類,非常簡單地分,就三種:通孔(Throughvia)、盲孔(Blindvia)、挖出孔(Buriedvia)via當然不是天生就有的,是在制板時用鐵環大角加工出來的,研究三種孔怎么加工鐵環,是件十分有意思的事。

繼續閱讀 …

萬贏體育|蓋茨投資20億美元 致力清潔能源開發

Bill Gates is no stranger to progressive thinking. The philanthropic foundation he runs with his wife, Melinda, has backed everything from longer-lasting pill-based contraception to a process whereby human waste can be converted into safe, drinkable water. Most of their efforts are focused on improving conditions for the world’s poor in markets often neglected by private sector corporations and government aid。

繼續閱讀 …