什么是pcb钻孔铝片垫板?

2024-12-02 14:05:02
推荐回答(3个)
回答1:

PCB钻孔时为了提高钻孔精度,减少钻孔毛刺会在待钻孔的覆铜板上放置铝片,起散热和导向的作用。
钻孔时覆铜板下会放置纸质的垫板,起到导向,以及保护钻针,避免钻针钻到钻机的台面。

回答2:

不太理解你的意思,

一般钻孔的铝片都是用来散热的,通常情况下铝是导电的,

为了避免散热片带点,所以都会在功率器件和铝制散热片之间放入云母垫片,用作绝缘隔离。不知道你说的是不是这个

当然也有直接把散热片用PCB制作在印刷线路板上的,比如PCB双面都大面积辅铜,然后中间在放大量的过孔,同时用来固定功率器件,这也是常规做法,不过这个的散热介质是铜不是铝

回答3:

给PCB钻孔时,板子的下面要垫木桨板,作用:1.缓冲作用力2.保护钻孔机台的台面.
板子的上面要有盖铝片板,就是你说的那个,作用有3:
1.散热,因为钻针高速运转,摩擦生热
2.固定钻针,减少运转时的震动,防止钻针偏移而造成的孔径过大和孔位偏差.
3.防止钻针刮伤PCB的表面

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