Electronics Forum | Tue Dec 31 02:29:29 EST 2019 | sssamw
Do you have clear picture show how it looks like solder open? And you can run DOE with TAL and soak time and peak temperature to see which factor is key, or non of them is key then you can try add some flux to see if better before change solder past
Electronics Forum | Wed Jan 20 21:25:32 EST 1999 | Tony A
| I get white residue on my PCBs after vapor degreasing. No comments on the vapor degreaser. Yes, I still use one of these. I use a vapor degreaser and a 1,1,1 replacement solvent due to the quick clean and quick dry times. Anyway, I only get whi
Electronics Forum | Thu May 04 10:35:24 EDT 2000 | Sal
THE TERMINONOLY I USED SEEMS TO BE INCORRECT , I THINK THE TERM I WAS LOOKING FOR IS WICKING . BACK TO THE PROBLEM , ISSUES WITH RESNETS, WHERE THE SOLDER PASTE SEEMS TO BE WICKING AWAY FROM THE TERMINATIONS OF THE COMPONENT TOWARDS THE VIAS WHICH AR
Electronics Forum | Mon Apr 17 21:09:38 EDT 2000 | Bene
Do you know the wetting speed of the solder paste you are using? Ask your vendor for this measurement. I have observed this issue on several products using pastes with wetting speeds faster than 1 second. As stated previously, smaller packages are m
Electronics Forum | Tue Feb 08 03:14:37 EST 2000 | Roni H.
Hi Jose, J-lead are very sesitive to coplanarity, which is the major cause for the defect you described. Other posibility is that there is not enough solder paste ; J-lead need around 10% more solder past then L-lead, You have to consider the screen
Electronics Forum | Thu Oct 14 23:10:20 EDT 1999 | Dennis O'Donnell
I once had similar problems. It went away when I switched to a different brand of solder paste. When I switched back to the previous brand of paste the problem came back. I don't know why but the solder paste brand made a difference. go to: www.
Electronics Forum | Mon Oct 11 12:25:02 EDT 1999 | Whitney Trepel
We have three buckets filled with leftover solder paste from our screen printing process. Kester has informed me that they no longer take paste, but only dross and pot dumpings. Does anyone know if there's someplace I can recycle this, or am I goin
Electronics Forum | Mon Oct 11 09:56:00 EDT 1999 | D Scott
A board shop rep contacted me about a process were solder paste is applied to the board as part of their mfg. process thereby eliminating the need for paste application at the assembler. This is a new one I have never heard of, but am willing to sit
Electronics Forum | Tue Feb 23 03:44:51 EST 1999 | K
| Can anybody give me the Pros and Cons of of using Cartridges over jars and/or vice-versa. Also, if using cartridges, what is the best way to keep the paste from seperating, short of buying a mixer that cost over $5000.00 | Thanks, | Bill | Inter
Electronics Forum | Mon Dec 14 13:16:11 EST 1998 | MMurphy
| DO you know of an Industry Standard that describes solder paste geometries requirements? | Check out www.alphastencil.com and select "Stencil Design Guidelines". This will at least give you an idea of how to deposit optimum paste volumes based on
