Electronics Forum | Thu Nov 07 09:23:05 EST 2002 | russ
What would the considerations be in utilizing a type 4 paste as opposed to type 3? We have an assembly that has a large amount of uBGAs (12 mil diam pad)along with 50 mil pitch BGAs assorted fine pitch etc... We are experiencing difficulty in paste
Electronics Forum | Fri Nov 08 17:10:04 EST 2002 | rspoerri
Is that square inscribed or circumscribed with respect to the pad? It sounds like you're saying circumscribed (overprint) given the volume comment. Wanted to confirm though. Kim
Electronics Forum | Fri Nov 08 17:20:52 EST 2002 | davef
You need to get as much paste on the board as you can get. A BIG opening gives: * Better release. * More paste. You may be able to cheat further by rotating the square so that it is on the diagonal.
Electronics Forum | Fri Nov 08 14:48:58 EST 2002 | davef
Yours is (12 thou x12 thou)/(2x(12 thou +12 thou)x5 thou) = 0.60 * Aspect=W/T for electroformed stencils SB GT 1.1 => Yours is 12 thou/5 thou = 2.40 So, we kind of think of what you�re trying do as maybe printing a 16 pitch QFP, which gives you simi
Electronics Forum | Thu Nov 07 10:59:11 EST 2002 | pjc
IPC-7525 "Stencil Design Guidelines" is a good reference document to have. Here are notes from a Tessera, (a major mBGA mfg.), study- "Application Note Solder Stencil Requirement for mBGA" The stencil aperture is to be square, equal in size to the l
Electronics Forum | Tue May 04 16:04:23 EDT 2004 | pjc
http://www.amd.com/us-en/assets/content_type/DownloadableAssets/boardassy.pdf
Electronics Forum | Mon Oct 10 06:03:03 EDT 2005 | mskler
Hi everyone, Can please some body suggest that if there is any L type conveyor which will be helpful for us to increase the one more in line machine in SMT. Due to space prob we can not add in line but it is possible only with the help o
Electronics Forum | Wed Sep 04 07:15:02 EDT 2013 | anilw2006
We have using SAC305 type solder paste for lead free process. One sample paste received of SN100C.After reflow SN100C type paste joint looks brighter and good compare to SAC305. Please help me which paste is good for smt process?
Electronics Forum | Thu May 11 11:25:56 EDT 2017 | davef
Key to Rosin Fluxes [from SUPERIOR FLUX & MFG. CO.] Type R (Rosin): Non-activated rosin flux for soldering copper. Residues are non-corrosive and non-conductive. Type RMA (Rosin Mildly Activated): Mildly activated rosin flux that contains no chlori
Electronics Forum | Tue May 04 13:11:17 EDT 2004 | Rob
Does any one can send me land pattern recommendation for package TSOP44 type II please. Rob
