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 | Wed Oct 02 15:08:37 EDT 2002 | Eric
See Fiske first line. I'd bet You are bending or catching the assembly in the ICT. How many probes at 8OZ each? do you use on that ICT? 800 probes = 400lbs. See "Flexure induced failure of BGA solder joints" by Compaq Houston TX
Electronics Forum | Tue Oct 15 13:35:57 EDT 2002 | Chris Dill
Stress analysis on a component is available ECT (fixture house) Feel free to contact me @ (401)739-7320 x3337 for info. Chris
Electronics Forum | Thu Sep 12 07:46:21 EDT 2002 | cyber_wolf
Within the last 2 days I have received several junk E-mails in my SMTnet E-mail account. Whats up with that ? It has never happened before.Has something changed ? Just curious.
Electronics Forum | Mon Sep 16 17:17:02 EDT 2002 | bdoyle
Hello and sorry for the delayed response. We haven't made any changes to the system. Have you used your smtnet email anywhere? We are currently looking into some spam filters for our server.
Electronics Forum | Tue Sep 17 07:08:51 EDT 2002 | cyber_wolf
The only place I ever used my SMTNET E-mail is through a couple of E-mails I sent to people that use this site. I sincerely hope that the used equipment guys are not passing out our E-mail addresses. Thanks for the response.
Electronics Forum | Fri Sep 13 13:16:55 EDT 2002 | stepheno
Moisture will still seep in over 12 years. Moisture barier bags are not 100%. If you accept them, conditionally accept them, and don't pay for them untill you are happy with them.
Electronics Forum | Fri Sep 13 14:26:44 EDT 2002 | davef
We do not reuse paste that is on the stencil at the end of a shift. Search the fine SMTnet Archives for previous descussions on this topic.
Electronics Forum | Sat Sep 14 20:42:48 EDT 2002 | kenbliss
Hi Scott Thanks for your comments, you stated "The highest attributer was clogging apertures in fine pitch, resistor networks, and BGA, Micro BGA areas" was this do just to the size of the aperture or bad or old paste or debris from inadequate clean
Electronics Forum | Sun Sep 15 09:13:41 EDT 2002 | davef
A near eutechtic alloy [ie, 63/37, 62/36/2, etc] would be fine. People print, place, and reflow millions of cermaic capacitors with these alloys every day.
