Electronics Forum | Mon Jun 27 06:52:07 EDT 2011 | rpatel28364
Hi All We are facing problem with solderability of BGA connector. After Xray we have found open under BGA connector. After removing from PCB it seems some copper pads are still gold. We are not sure why this is happening. We have 5 thou stencil and
Electronics Forum | Wed May 29 19:17:17 EDT 2002 | russ
We are starting to see a large increase in the use of through board gold plated connectors that require hand soldering with the limitation of .o6" encroachment up the pin. What is the best way to accomplish this? we currently scrap about 5-10% of t
Electronics Forum | Thu May 30 08:04:25 EDT 2002 | zanolli
Hello Russ, I'm not quite sure I understand your question. Are you saying that you must hand solder these connectors because the gold plating doesn't allow other though hole processing methods to wet the solder the length of the pin in the PTH? Reg
Electronics Forum | Fri May 31 09:13:12 EDT 2002 | russ
Jim, you are right in this. these connectors have long pins 1/2" or so that protrude through the board and are used for mating into a female connector on some other assembly. due to both length and "no solder allowed in contact area" criterias thes
Electronics Forum | Fri May 31 14:02:23 EDT 2002 | dougt
Russ We decided to use a PC-104 brd for a piece of equipment and had to make a "PC-104 Adaptor Brd" as it is affectionately known. The actual PC104 connectors came with what they called a solder system, a flat piece of solder with holes in it that w
Electronics Forum | Thu May 30 14:35:00 EDT 2002 | davef
Hey Jim, What can you tell us about the causes, results, and prevention of 'fretting corrosion' in connectors? Jim, I'm not adding this to insult you, but as a source of more information for those that are not familiar with the topic. Background o
Electronics Forum | Fri May 31 09:09:21 EDT 2002 | russ
Dave, you would be correct in this application. I wish I could prevent these products from coming into our shop, but... I do like the idea of press fit and I will have to research on the availability and persuade the customers to change. I was wond
Electronics Forum | Thu May 30 08:51:45 EDT 2002 | davef
I assume the connector is like one used in PC104 that allows mating of boards together by inserting the pins extending from the connector on one board into the female portion of the connector on a second board. Who ever accepted this job is dopey.
Electronics Forum | Fri May 31 08:51:09 EDT 2002 | zanolli
Hello Dave, As related to connector mating interface, fretting corrosion is the oxidation of the contact points, causing high resistance across the interface. Fretting corrosion is caused my micromotions in the interface exposing the metalized conta
Electronics Forum | Fri May 31 17:04:02 EDT 2002 | davef
We use boots / shunts er wutt ever you call them to protect solderable component surfaces from wave soldering. Not sure how it would work in your case try: * Kinnarney Rubber 450 Main St. P.O.Box 37 Mantua, N.J. 08051 609-468-1320 fax 7438 http://ww
