Electronics Forum | Wed Oct 20 19:36:45 EDT 1999 | Dennis O'Donnell
Hi Mark: Running a wire under a BGA is possible, however if you plan to mount the BGA over the wire you would want to make sure that the wire insulation will withstand the heat of the reflow temperature. A more reliable way would be to lay a trace
Electronics Forum | Mon Oct 18 09:41:56 EDT 1999 | Wolfgang Busko
That should not happen. There are some threads concerning BGA and wavesoldering you could look for. It�s said that you should protect the vias in the BGA-area by soldermask or at least with tented vias to prevent rereflow of BGAs solderjoints what co
Electronics Forum | Tue Oct 19 22:27:29 EDT 1999 | Stu Leech
We have just completed some studies of with ABPAC, who is a large subcontract assembler of plastic ball grid arrays. BT laminates can pick-up appreciable moisture in just two hours. They are using TVP demoisturizing, our product (I apologize for the
Electronics Forum | Fri Oct 15 11:05:50 EDT 1999 | Mark Phinney
Earliar we had problems with board warpage, Much of our problem was due to imbalances in the copper on oppisite layers in brief on a 8 layer board the copper on layer 1 should = the copper on layer 8, 2=7, 3=6, 4 = 5. We added copper to some layers t
Electronics Forum | Wed Oct 13 13:47:02 EDT 1999 | John Thorup
Jeff In my experiance the main problem is the flux content of the paste (up to 50%). throwing it in the wave pot results in a big stickey ring around the pot, a lot of smoke and, as Brian says, a lot of dross. A fire is not that unlikely! I tried
Electronics Forum | Wed Oct 13 15:48:30 EDT 1999 | Jeff Sanchez
John, I'm sure your right! Cause my partner is laughing at me over the idea. "How often do we want HazMat at our door" "Do we really want to be friends with them on a first name bases" " Do we want to make friends with their friends,OSHA" I still thi
Electronics Forum | Thu Oct 07 15:55:00 EDT 1999 | RICK_EEI
Hi everyone, I am having a problem with cleaning PCB's with different finishes. I run one type of board through a drag solder and it comes out perfect using a water slouble flux then putting it in an aqueous cleaner. Then I run another board with a d
Electronics Forum | Thu Oct 07 06:16:18 EDT 1999 | Ken Fong
Hi, We are using mixed technology in our PCBA. Would like to know whether there is any criteria governing/guiding the use of mixed technology in such aspects as: 1. Some SMDs cannot be used in some kind of PCB materials such as FR1? 2. Some SMDs are
Electronics Forum | Thu Oct 07 04:29:40 EDT 1999 | Dylan T. Kenny
Hi all. I have some experiance in regular electronics, but the hardest part for me was always the soldering, so I am very intrested in SMT. So what would be the best way to get started in SMT? I would prefer not to have to spend alot of money, but
Electronics Forum | Wed Oct 06 10:31:05 EDT 1999 | Chris May
Hopefully, everybody suffers from solderability of SOT-23 devices and I would like to know how everybody else resolves this problem. Historically, here, we have always gone for 6 thou stencils. I found that going to an 8 thou stencil improved the sit
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