Electronics Forum | Thu Jan 22 12:21:54 EST 1998 | Michael Allen
Is there a standard (JEDEC or other) for "lead sweep" errors on fine pitch (eg, 0.5mm) gull wing leads? Parts from one of my suppliers has a sweep error up to 6 mils; the mechanical drawing does not address lead sweep error, nor is there a true posi
Electronics Forum | Mon Aug 21 19:35:51 EDT 2000 | Dave F
Kyung Sam Park: Sure, several causes of plastic QFP package delamination, other than humidity absorption, are: * Corrosion on component leads * CTE mismatch between leads and package materials * Package material adhesion strength degradation Wh
Electronics Forum | Mon Sep 13 10:39:50 EDT 2004 | Marie
Suggest looking at the packaging,is it sufficient to prevent damage to the QFP?. What way are these components stored when received?.Are the reels stored in boxes or racks?.Storage in boxes may cause damage from stacking the reels on top of each oth
Electronics Forum | Thu Oct 02 18:01:43 EDT 2008 | davef
Weller� WLSK1000 QFP Lead Repair Kit * [CooperTools PO Box 728, Apex, NC 27502; http://www.coopertools.com ] * [Practical Components, Inc; 10762 Noel St, Los Alamitos, CA 90720; 714-252-0010 F714-252-0026 http://www.practicalcomponents.com/tools_supp
Electronics Forum | Wed Jan 14 12:38:59 EST 2004 | Chris Lampron
Good Day, I have had a similar situation with a QFP. It turns out that the PCB HASL finish was too thin causing oxidation on the copper. The problem was only evident on the QFP as this part had the smallest deposition of paste (and therefore, flux)
Electronics Forum | Wed Jul 02 14:25:14 EDT 2003 | Earl Wildes
Greetings. Does anyone know of a good reference on the proper physical handling of surface mount devices? We have a number of very small builds, so our stockroom is very often issuing single piece quantities. The parts are protected from ESD, but
Electronics Forum | Wed Aug 09 12:22:11 EDT 2006 | Rob
You are going to struggle with that sort of connector - the only pin headers that seem to have widespread sucess are the dual inline ones with bent over j leads that sit on the board. They come with a plastic hat that allows vacuum pick up. However
Electronics Forum | Tue Nov 28 20:11:39 EST 2000 | Dave F
Yes, it makes sense that company peculiar issues should not be included in a general training program, but say the issue delt with: * Course indicating [through correct responses to testing] that component leads should not be handled because it could
Electronics Forum | Wed May 26 06:54:07 EDT 2004 | davef
Q1) if this is an acceptable component-lead modification? A1) Yes, it's acceptable Q2) and does this mod meet any existing IPC specs?(did a internet search but no result) Q2) IPC repair guidelines are: 7711A/7721A - Rework and Repair Guide For ot
Electronics Forum | Tue Aug 22 09:30:31 EDT 2000 | Kelvin Chow
Mr. Lee, Although most of the lead free alloy used for solder paste and wave soldering have been identified, a suitable alloy used for leaded Ic packages (like QFP, PLCC..etc) have not been identified yet. Do you have any suggestion on this lead-f
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