Electronics Forum | Tue May 19 08:20:10 EDT 2009 | Mity C
Good Morning, We are underfilling some of our BGA's. This is a specified customer requirement. The material we are using is Emerson & Cuming E-1216 (also specified by the customer) The material was selected because of a close CTE match with the PCB.
Electronics Forum | Tue Nov 14 13:34:28 EST 2000 | Leon
Jack Yes I have one. But I am not in Scotland. can I help you? Leon
Electronics Forum | Thu Nov 16 05:05:59 EST 2000 | andy
Jack , I am in Scotland and can help you with this . Please leave a mail address where we can talk offline . Andy .
Electronics Forum | Wed Sep 25 11:11:14 EDT 2002 | xrayhipp
Try .005 or even .004 thick laser cut electopolish stencil and reduce grain size of paste. Go with 400 or 25 in the case of AIM. We had a similar prob.
Electronics Forum | Tue Mar 09 22:06:24 EST 2004 | Ken
Two words that will send shivers down any self-respecting rework professionals spine: HEAT GUN Not affiliated with black and decker or vidal sasoon hair dryers.
Electronics Forum | Tue May 19 06:57:33 EDT 2009 | cunningham
whats the reason for the underfill? we dont underfill any of our BGAs rework could be a issue if they need to be replaced? tried DP190?
Electronics Forum | Tue May 19 08:07:56 EDT 2009 | davef
Search the fine SMTnet Archives to find threads like: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=58257
Electronics Forum | Wed Jul 01 18:49:27 EDT 2009 | stevenlimth
1smtdude, I interested in your explaination of re-work an underfill part. You mention the material can be heated to a plastic state to become vicious... do you know usually what range is the temperate? (guess it can depend on the type/manufacturer o
Electronics Forum | Thu Sep 12 09:12:22 EDT 2002 | mhoughton
I have printed and placed similar devices in high volume with exactly this spec for a couple of years with no problems, are you using laser cut stencils and what type of solder paste are you using? and what is the end use of the product as it may nee
Electronics Forum | Thu Sep 12 10:45:29 EDT 2002 | pbarton
We have used a laser cut stencil 0.15mm (0.006") thick with 0.3mm (0.012") square apertures radiused in the corners 0.06mm (0.0025") to aid paste release. This approach with the (type 3) paste we use has proven successful on thousands of devices plac
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