BGA返修台焊接芯片的方法步骤

随着芯片在各行业中应用越来越广,芯片的返修变得尤其重要,下面由190bp踢球者即时指数智能为大家介绍一下BGA返修台焊接芯片的方法步骤。


首先把主板放在焊架上,然后把需要焊接的芯片放在BGA返修台的中间部位。用隔热材料将不需要加热的BGA芯片隔离开来,一直把芯片加热到附近的电容能够来回移动,那么可以说明这个BGA芯片可以取下了。


微信图片_20220630155800.jpg


把BGA芯片取下之后务必要把主板上多余的锡清除干净,操作方法如下:一、首先先涂一层焊膏,然后用烙铁把主板上大部分的锡都刮掉,此时还是会有部分锡渣残留在主板上。然后用烙铁带着吸锡线在主板上轻轻的移动(由于有些小厂或杂牌主板的焊点做的较松,移动吸锡线时一定得缓慢移动,以免把焊点拖下)吸完之后,把剩余焊膏擦洗干净,如果不擦干净的话,芯片在焊完之后会出现虚焊或结触不良的情况。


如果我们手上有新的芯片(植完锡球)就直接把芯片按照正确的位置放在主板上加热,如果没有新的芯片可以从别的主板上取一个同种型号的芯片替换,可以把一个芯片取下后,用以上的方法(主板上的余锡处理法)把芯片的锡处理清,用棉签棒在芯片的反面均匀涂上一层焊膏(无杂质),再把对应的钢网放在芯片上,要求钢网一定清洗干净,钢网表面和孔内一定不能有焊膏或杂物,用酒精反复清洗、冲刷,晾干后把钢网放在芯片上,用纸片或小铁勺把锡球撒在钢网上,由于芯片上涂上一层焊膏且焊膏带有一定的粘性,每一个钢网孔的下面都有一小部分焊膏,所以每个孔内都会均匀的粘上一个锡球,这样我们就把锡球给放在芯片上了。



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