Electronics Forum | Wed Feb 18 13:47:55 EST 1998 | Phil Szypko
| I am currently researching SMT for an essay which | counts towards my Elec Eng degree course. | Unfortunately the deadline is Friday 20th Feb and | as yet I have found little information on which to | base my essay as other students have loaned out
Electronics Forum | Wed Aug 15 21:56:53 EDT 2001 | hardy boy
Our R&D Guys used to push the lead of a fine pitch component using a Pick or a thin metal tip and if the lead snapped off from the land it's considered failed. Is that the proper way of identifying the solder joint strength? We got problems with sold
Electronics Forum | Mon Aug 27 19:24:00 EDT 2001 | sharafali
It has been mentioned that DPMO offers large advantages over First Pass yield calculations for measuring process performance!!regarding the same I have a few queries: What are the benchmarks for using DPMO as measures of process performance? How is
Electronics Forum | Thu Aug 30 21:25:37 EDT 2001 | davef
Oooo, nice machine. For chuck repair, try: Mt Sterling Industries POBox 670 Mt Sterling KY 40353 606.498.1015fax4156. This is not rocket science. A local machine shop could probably do just as nice of a job. For newer chucks, try the brokers list
Electronics Forum | Sun Sep 09 14:34:50 EDT 2001 | darburch
Eric Whenever I see a board come out of the chipshooter missing parts the first thing to check is the support pins. However if you have checked table and part height I assume that you have also checked the pins. So the next thing to check is the vac
Electronics Forum | Tue Sep 18 01:41:23 EDT 2001 | shvetangcd
Hi Jeff, We are having solder-short problems for BGA, QFP, and some other fine pitch parts while using DEK screen printers. The PCB is processed on the second half of the line for screening the side with BGA, QFP, and other fine pitch parts. Which m
Electronics Forum | Fri Nov 16 10:53:30 EST 2001 | Carol Stirling
Hello Everyone, Our board supplier changed our board surface finish on a prototype to flat solderable tin (FST) because of the PWB thickness (.125"). The pads seem to be contaminated, particularly on second side pass through reflow. The solder appea
Electronics Forum | Wed Mar 20 15:17:38 EST 2002 | MikeF
I understand your point, and generally agree with you about no lotions in the production area. My question for you and the others is what to do with the person whose skin is so dry it does not make good contact with their ESD wristband? I do not li
Electronics Forum | Wed Mar 20 11:55:19 EST 2002 | slthomas
Interesting. Ours failed miserably. Of course we toss everything on the stencil at the end of a shift (they are instructed to let it run down to minimal volume on the stencil as they approach quitting time) so it's not an issue. We are more concer
Electronics Forum | Fri Mar 22 21:31:25 EST 2002 | ianchan
Hi Guys, Anyone have "comments/testimony" on having possible quality level achievements, for AQL=0.1, C=0 ??? Is this a realistic "1st Pass Yield" expectation? how about for OQC submission Lots from production? especially in a high-mix, low-volu
