Electronics Forum: soldering problems with qfn (Page 13 of 37)

Die attach with solder paste

Electronics Forum | Wed Aug 28 10:16:12 EDT 2002 | Jim M.

Sam We install a lot of die in the SMT room using same process as SMT parts.Water soluble solder paste is used for attachment of die to ceramic and boards. Biggest problem i found is the adjustment from installing the die in the bonding area. The t

Strange problem with my dispenser

Electronics Forum | Tue Aug 10 15:56:30 EDT 1999 | Jason Gregory

Has anyone ever heard of this? I have a Camalot System 5000 and we were in a pinch to produce some prototype boards. We needed Sn62Pb36Ag2-no clean in a dispensing mesh. All I could get my hands on was some Interflux paste in a jar. The formulation i

SMT Connectors with locating pins

Electronics Forum | Tue Oct 30 14:39:41 EST 2001 | markhoch

Has anybody else out there had problems with SMT connectors with plastic locating pins lifting up during the reflow process? We've had several instances with several differant types of SMT connectors lifting up during the reflow process. We've even g

Problems with TI DSP modules

Electronics Forum | Wed Oct 24 11:14:44 EDT 2001 | Cemal Basaran

Dave; Thanks for responsding so fast. here are my answers. 1-WOW!!! How do people get these cool toys? I am with the University at Buffalo Electronic Packaging Lab. http://www.packaging.buffalo.edu We have pretty much everything that is sold on the

Intermetalic Growth with Gold Finishes

Electronics Forum | Wed Aug 22 22:22:52 EDT 2001 | davef

First an administrative point, you can edit the postings that you make on SMTnet. Look for the yellowish-greenish EDIT button at the top of your posting. Second there are over 170 postings on intermetallic* on the fine SMTnet Production Forum Archi

Mixing no-clean solder with activated

Electronics Forum | Tue Jul 03 15:45:04 EDT 2001 | genny

No, I haven't even gotten around to formulating my test plan (what PCB to use, what lab to use, etc, etc,...ad nauseum), let alone convince my company that we need to do it. I also got caught up in another extremely tight deadline project and haven

Pin in Paste with dispenser

Electronics Forum | Mon Jan 24 04:26:32 EST 2005 | Hannu

Morning all, Has anybody done any pin in paste job with a dispenser? I read somewhere that the needle i.d. should be slightly larger than the hole diameter, but with holes of 1.4 mm I would have to work with a very large needle indeed. How does past

Mixing no-clean solder with activated

Electronics Forum | Wed Jun 27 21:17:37 EDT 2001 | davef

;-) Earth to Genny: Hellooooow!!! No one knows the answer. We�re guessing that it might not be a problem, but we don�t know!!! We are not holding-out to drill you. We�d tell you, if we knew, honest. ;-) The people that are goofy enough to do

Re: Problems with wave solder

Electronics Forum | Thu Nov 19 09:32:52 EST 1998 | Earl Moon

| | | | | | For some as yet unkown reason, we have started to have some boards sag and go under the wave. The boards are surface mount top side and conventional components wave soldered. We have checked the wave hight and both the profiles on the wav

Re: Problems with wave solder

Electronics Forum | Thu Nov 19 09:55:47 EST 1998 | Dave F

| | | | | | | For some as yet unkown reason, we have started to have some boards sag and go under the wave. The boards are surface mount top side and conventional components wave soldered. We have checked the wave hight and both the profiles on the w


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