On 2/28/06, Timothy Miller <[EMAIL PROTECTED]> wrote: > I've watched an experienced professional solder QFP's, and that was > magic too. The guy would tack down corner pins to hold the chip in > place and then swipe the iron and solder down each side, relying on > surface tension to avoid shorts. I tried it and made a mess of shorts > and opens. There's some trick to how hot the iron is, how fast you > sweep down the side of pins, etc.
Its not that hard.. Just a little practice and the right ammount of flux. Having a knife tip vs a round tip helps considerably. Now these new "leadless" parts that are BGAs waanabees, those are a bitch. Even our techs say they are hard. For BGA rework though you have to use a rework station. BGA's actually solder up really nice. The surface tension self centers the part. The cricital part is a nice clean screen of the solder paste. -- Richard A. Smith
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