Electronics Forum | Wed Jul 12 14:14:17 EDT 2000 | celiav
I have 2 contract manufacturers who have recently switched to immersion tin and both are experiencing problems. One supplier is having problems reflowing the solder in the oven, while the other is having insufficient hole fill at wave solder. Both ha
Electronics Forum | Wed Jul 12 16:33:39 EDT 2000 | Mark Charlton
We just went through a difficult time processing SMT immersion white tins PCA's and found the following: 1. FAB vendor had a degraded tin solution resulting in improper plating thickness 2. FAB vendor was not using the proper cleaning process Get
Electronics Forum | Thu Mar 23 22:20:51 EST 2000 | Dave F
Chris: I'm unsure about the kits you seek. Solderability of: * Components: J-STD-002, Dip And Look Method. Malcom Instruments makes a very nice tester. * Boards: IPC TM-650 2.4.12A Solderability, Edge Dip Method Good luck Dave F
Electronics Forum | Fri Mar 23 10:57:09 EST 2001 | blnorman
Go to http://www.ipc.org/html/fsresources.htm, scroll down and click on downloadable resources and IPC-65-650 is there for the downloading, free. The problem is that you have to download each individual test method, you can't download the entire doc
Electronics Forum | Tue Apr 17 21:30:27 EDT 2001 | davef
The issue is on the table. Which is it? Are you ... * Loosing your gold plate when you remove the tape? [A tape test is a standard test for evaluating gold fingers. Check IPC-TM-650, test number wachacallit. Checkitaut.] OR * Putting tape o
Electronics Forum | Fri Apr 20 07:12:22 EDT 2001 | wbu
Dougie, oh yes, it�s a bit short that chapter. I have the Revision e in front of me and this one contains in the appendix the needed IPC-TM-650 Test method for bow and twist. Can�t think that they don�t have that in the new revision. Hope you find
Electronics Forum | Mon Apr 23 11:44:55 EDT 2001 | CAL
650 Standards are also located in the back of IPC JSTD-001. I am currently looking at 4 pages on bow and twist. Percent bow = R1-R2/L x 100 (R1= Highest point; R2=lowest or resting point; l= length) Percent twist=(R1-R2)/(2xL)x 100 Sorry if this is
Electronics Forum | Mon Apr 23 14:03:18 EDT 2001 | Ryan Jennens
Dougie- We,too, have the IPC-A-600F, and the spec. refers to IPC-TM-650 test method in the back of the book. Look on page Number 2.4.22 of the test methods appendix. This outlines the procedure for determining the percentage of bow and twist,
Electronics Forum | Wed Jan 12 14:43:54 EST 2000 | JAX
Doug, Jedec has this info. Here is a few for you to use. LENGTH, L+LEADS, WIDTH, W+LEADS, PITCH, AVG. HEIGHT. 1. CQFP100AC: 17.28,22.35,17.28,22.35,.635,4.92 2. CQFP100AF: 32.52,37.59,32.52,37.59,1.27,4.92 3. PQFP100AD: 19.05,22.35,19.05,22.35,.
Electronics Forum | Tue Feb 24 18:21:52 EST 1998 | Graham Naisbitt
You should refer to the IPC-J-STD001B and IPC-TM-650, they will give you good recommendations. Also, we do new reliability test systems and if you can give me your address and e-mail, I will send you some more info. Regards, Graham Naisbitt | looking
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