Electronics Forum: how to solve lifted pad (Page 1 of 1)

Water Residue Stains - how to remove?

Electronics Forum | Wed Dec 19 02:24:40 EST 2001 | ianchan

Did I mention, we tried to use the same WS flux formulae to brush-cover the affected flex-PCB pads, and subject it to another round of water-wash, followed by oven-baking, and it still doesn't help abit? Oven bake : 100 deg-C, approx 15~30mins (manu

Re: how to overcome tolerance in automatic alignment

Electronics Forum | Fri Sep 10 09:03:52 EDT 1999 | ScottM

hi, i m college student. i m currently doing my Final year project in PCB drilling. the main task is to design auto feeder which allign the PCB properly in position before drilling take place. the close tolerance becomes a big problem to the prec

Re: how to overcome tolerance in automatic alignment

Electronics Forum | Fri Sep 10 12:09:02 EDT 1999 | Earl Moon

hi, i m college student. i m currently doing my Final year project in PCB drilling. the main task is to design auto feeder which allign the PCB properly in position before drilling take place. the close tolerance becomes a big problem to the pr

Re: how to overcome tolerance in automatic alignment

Electronics Forum | Sun Sep 12 08:20:04 EDT 1999 | se

hi, i m college student. i m currently doing my Final year project in PCB drilling. the main task is to design auto feeder which allign the PCB properly in position before drilling take place. the close tolerance becomes a big problem to the

Re: How to do with tombstoning for component '0402'

Electronics Forum | Mon Nov 06 10:29:28 EST 2000 | Dean Stadem

All of the replies have merit. Here is another one. Because the cause of the tombstoning is wetting forces that are imbalanced, and one end wets faster or more readily than the other, the 0402 lifts up on that end easily because of its low mass. Incr

It IS possible to rework this BGA socket!!

Electronics Forum | Thu Jan 07 16:46:05 EST 1999 | Steve Gregory

Hey ya'll!! SUCCESS! I was able to get that monster off!...(Now I just gotta' be able to get it back on right...hehehe) If you remember, the whole reason I had to rework it was because somehow they got the hole positions wrong in the board for

Re: Is it possible to rework this BGA socket?

Electronics Forum | Wed Jan 06 21:56:37 EST 1999 | Steve Gregory

Youse: This is SMTnet Steve. Sacrifice the socket. By the time you finish putzing-around removing the balls to get the socket off the board, replacing the lifted pads on the board, and reballing the socket; you've burnt the $100 that the socket

Re: Is it possible to rework this BGA socket?

Electronics Forum | Wed Jan 06 23:01:48 EST 1999 | Dave F

Youse: This is SMTnet Steve. Sacrifice the socket. By the time you finish putzing-around removing the balls to get the socket off the board, replacing the lifted pads on the board, and reballing the socket; you've burnt the $100 that the socke

Re: Is it possible to rework this BGA socket?

Electronics Forum | Wed Jan 06 21:17:31 EST 1999 | Dave F

Hey All you Einsteins out there!! I gotta' problem...('course you do Steve, or you wouldn't be bugging the TechNet now would you?) I had a phone call from a acquaintance of mine wanting to bring two prototype boards over to rework a BGA socket

baking boards, revisited

Electronics Forum | Fri Oct 04 11:34:42 EDT 2002 | Bob Willis

Some additional comments from a paper may be of interest. Baking Printed Circuit Boards - Why and How Baking printed boards prior to conventional and surface mount assembly should not be necessary. Often boards are baked for historical reasons; in

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