Electronics Forum | Sat Dec 12 17:46:35 EST 1998 | Tom B
SMTneters, I'm famialiar with lambda, omega, and gemini waves but not with "A" wave. Can somebody give me an explanation? thanks Tom B.
Electronics Forum | Tue Dec 15 15:21:24 EST 1998 | Chrys
| SMTneters, | I'm famialiar with lambda, omega, and gemini waves but not with "A" wave. Can somebody give me an explanation? | | thanks | | Tom B. | Tom, The term "A" wave refers to an asymetrical wave. It's an Electrovert term that describes
Electronics Forum | Mon Feb 27 06:42:37 EST 2006 | Slaine
What are the long term issues with high tin content solders on parts plated with silver over copper? Is it possible that the silver will be absorbed by the solder then over a long period of time the tin will react with the copper causing it to part
Electronics Forum | Mon Feb 27 09:31:10 EST 2006 | Slaine
on sections ive looked at with 7 microns of silver and 4microns of copper, the silver had been totally absorbed into the solder in most places and a large amount in some places all the copper as well, so i think the answer is that to provide long ter
Electronics Forum | Tue Jul 03 16:59:18 EDT 2012 | dontfeedphils
Reflowing a BGA can be a reliable and long term fix, but it has to be done correclty, and using a heat gun and going in circles around the part is definitly not the right way to do it. To do it correctly you would flux under the bga, use a rework st
Electronics Forum | Tue Jul 03 16:15:08 EDT 2012 | kq702
Hi, when they did the reflow with the south bridge chipset they took a heat gun and went arround the chip in circles. This is what I did with the broken apple motherboard. I covered the board in tinfoil and cut out the squares arround the gpu, cpu an
Electronics Forum | Tue Jul 03 11:30:18 EDT 2012 | davef
Just so that we both on the same page: * When you "reflow the chips on the broken board," what do you actually do? How do you do it? What kind of controls do you use? * When someone "did a reflow on the south bridge chipset," what do they do?
Electronics Forum | Wed Jul 04 12:18:14 EDT 2012 | davef
Phil is correct in his description of proper rework technique. Possible explanations of the reason for popping of your BGA are: * Thermal cycling of components cause them to flex on a different point in the cycle that the board possibly resulting in
Electronics Forum | Mon Feb 27 09:09:36 EST 2006 | davef
Silver on your copper or brass part is a solderability protection. The silver diffuses into the solder and you solder to the base metal, either the copper or brass in your case. Soldering to copper is well known. The issues are soldering to brass
Electronics Forum | Tue Jul 03 02:42:37 EDT 2012 | kq702
Hi I did a reflow on an HP laptop a while back- it was a DV6000 series. The original problem was the internet stopped working- turns out the south bridge chipset was causing the issue (its a very common issue I found out after searching online). Some
