Electronics Forum | Thu Mar 20 14:11:45 EST 2003 | MA/NY DDave
Hi Guys, There are techniques to do rework that involve molecular surgery even when selective, ablation and piles of localized techniques exist yet the cost is far too high and scrapping is mostly a best cost manufacturing alternative. At the cost o
Electronics Forum | Wed Feb 12 17:41:18 EST 2003 | MA/NY DDave
Hi, Gee David F is as bad or as good as me on a bad day. Boy can I get mad... "new information" Many of these defects have been around so dang long and seem to get recycled as the latest rage and the newest of new information in technical articles
Electronics Forum | Thu Mar 27 14:09:41 EST 2003 | Enrique Chairez
Hi All, I have observed this problem with one PCB supplier, the portion of the PCB area affected was cut and observed in SEM (Scanning Electron Microscope) and submitted to an EDX (Energy Disperse X ray analysis), finding Phosphorus levels higher
Electronics Forum | Thu Mar 27 14:49:20 EST 2003 | MA/NY DDave
Hi Enrique, I don't remember all the energy levels that make the techniques you or your associates are using, effective. Each energy level yields information that must be understood is the best that I should give. HEY Based on my comment, does this
Electronics Forum | Tue Feb 11 22:28:25 EST 2003 | davef
What do you mean by "new information"? On final module testing: * If you have hypercorroded nickel and you detect it during final testing, you'll notice it. * If you have hypercorroded nickel and you don't detect it during final testing, you'll ship
Electronics Forum | Fri Nov 08 08:52:54 EST 2002 | dphilbrick
Juan There are many things that cause this and the first thing I would do is request quality records from your board fab facility on that particular lot. If they are unwilling to give them to you this is a good sign they had a processing problem. Th
Electronics Forum | Thu Mar 27 22:00:27 EST 2003 | davef
Enrique It's true that higher energy guns do a better job measuring "light" materials. [Actually, if that was true by itself, you'd expect the fabricator's readings to be higher than yours. But, HEY!!!] Regardless, there's alot more to getting an
Electronics Forum | Thu Aug 23 09:52:38 EDT 2007 | d0min0
Hi, in past we had an issue with ENIG surface, black was Ni that get pass the Au - but it was discovered after reflow (SnPb) and the IC was losing contact with Cu tracks...at customers application :| Reason was as I remember too thin Au sufrace... w
Electronics Forum | Mon Oct 16 17:46:49 EDT 2006 | Dan
Recently I was given a bad Bios Link from Toshiba which fried my Bios and now my laptop boots to a black screen. I recently unsoldered and removed the existing Bios chip and have ordered anotherfor replacement. Unfortunately while removing, i damag
Electronics Forum | Thu May 05 16:18:47 EDT 2005 | jimmiem
The black pads that we see are on the BGA component. We removed the component from its site and on 2-3 pads 100% of the ball stuck to the pad on the PCB and the corresponding BGA pad was black.
