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 | Tue Jun 28 14:06:08 EDT 2011 | dmiller
If you have room, and the aperture size will allow for it, try a 5 mil overall stencil thickness with a 1 mil step-up in the area of the BGA connector.
Electronics Forum | Mon Jun 27 21:28:15 EDT 2011 | samsim
It seems to be no solder paste release at certain stencil opening, you may need to enlarge the stencil opening. By the way what is the area ratio for the opening and how is the shape (round/square/diamond)?
Electronics Forum | Thu Sep 04 03:27:52 EDT 2008 | akareti
All, Does anyone have experience with underfill 300balls BGA connector? We have a component with 300balls BGA connector that connectorize with Flex. Customer wants to have an underfill Questions - Possibility for underfill 300balls BGA connector -
Electronics Forum | Fri Sep 05 12:15:34 EDT 2008 | evtimov
All, Does anyone have experience with underfill > 300balls BGA connector? We have a component with > 300balls BGA connector that connectorize with > Flex. Customer wants to have an > underfill > > Questions - Possibility for > underfill 300ba
Electronics Forum | Sun Sep 07 09:57:23 EDT 2008 | davef
We have BGA connectors on rigid laminate. Points are: * We love BGA connectors for mating mother/daughter boards because they eliminate the wave solder step required for PTH connectors. * BGA connectors are very tricky to assemble, much trickier than
Electronics Forum | Mon Sep 08 02:39:37 EDT 2008 | akareti
By connector, you mean socket? Connector use for board to board connection from FCI, MFG P/N: 84500-202 What is the material of the connector(socket)? Is it very frigale? Housing: liquid crystal polymer Solder ball: SnPb 63/37 how big are the bal
Electronics Forum | Thu Jul 28 05:41:22 EDT 2005 | K
Hi guys, Have any of you encountered harwin connector M80-647 in the past? Have you noticed any problems with the reliability of the component, solderability and 'reworkability' (thats a new word for sure)? Heres a PDF of the component; http://www.
Electronics Forum | Thu Sep 09 04:45:02 EDT 2004 | Rob
Hi, Depends on where in the world you're based, but in the UK you can pick up a decent Universal GSM1 for around �12K-�15K ($20K-$27K). We place BGA's, huge fine pitch IC's, 72mm connectors etc with no problem. I believe they do up to 100mm feeder
Electronics Forum | Sat Nov 23 10:19:39 EST 2002 | davef
This sounds alot like the warping that we all see periodically in BGA. CTE of material is temperature dependent and not temperature changing rate dependent, so you are pretty much hosed by the physics. Regardless, I do like trying like crazy to g
