Electronics Forum | Thu Nov 09 23:27:53 EST 2000 | Craig
We are considering using gold plating on our fine pitch pcbs (as oppossed to HASL). We have heard of long term solder reliability problems with joint imbrittlment how bad is this and does it apply for all of the different plating processes the same?
Electronics Forum | Tue Oct 09 14:41:13 EDT 2001 | mparker
I just realized my last posting has some incorrect references. Blame it on last nights sour mash! (St. Pauli girl didn't respond!) The article I referenced was found at the AlphaMetals website, a study done for AlledSignal, in conjunction with Churc
Electronics Forum | Mon Jun 14 11:44:23 EDT 2004 | Dreamsniper
I have boards with bad HASL application. First they're not even. Second some pad edges have no HASL and still remains bare copper. What's the maximum and minimum HASL thickness required for a good solderability. My boards are about 6 weeks old, I kno
Electronics Forum | Fri Apr 15 16:02:26 EDT 2005 | jdengler
ING, If my memory is correct: -This is from the large air cylinder below the X/Y table moving slow or not getting down all of the way. -The air cylinder has a sensor for when it's down all of the way. - This sensor could be bad but most of the t
Electronics Forum | Fri Nov 14 17:37:58 EST 2008 | snsmt
WHat about bad mounting? i have 2 fixtures and sometimes it would mount with no misalignment and sometimes it would. WHat could be the problem in this case/ I know the fixtures are good because they work on a different program that we have. I don't u
Electronics Forum | Sun Dec 17 22:23:46 EST 2017 | jmelson
Well, I fixed it. I had resisted taking the motor off because of the recalibrations that would be required. But, it got bad enough I had to. Under the microscope, I could see copper dust packed between the commutator segments. I removed that, and
Electronics Forum | Tue Feb 11 14:37:26 EST 2020 | spoiltforchoice
If you're asking me, I'm using BLT LFS-UFP-T4 (they have an even better paste to treat badly now if you add zq). Those in the test of the world might find Loctite GC10 is similar, however the stencil and tack times on the BLT are pretty awesome and
Electronics Forum | Tue Jun 26 16:43:19 EDT 2001 | CPI
Yes a 6 mil solder deposite will reduce to approx 50% of it's original size. Does this happen on only 1 BGA? Is the BGA that its happening on have smaller balls than the others, what I'm getting to is, are you sure you are depositing the proper amo
Electronics Forum | Tue Jun 07 16:19:58 EDT 2005 | davef
Q1) How to identify on good or bad ICs lead that could contribute to dewetting? A1) Distinguish between good or bad IC that could contribute to dewetting by testing for solderability, according to J-STD-002. Q2) What actions that must be taken in fa
Electronics Forum | Wed Aug 22 21:11:25 EDT 2001 | davef
When it works right, it's a beautious thing. => When goes wrong, you have one board with some of the other board's material, not too coo. Scribed and broken ceramic has bad-butt sharp edges. You'll feel this sticky stuff on your hands, look down,
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