Electronics Forum | Wed Aug 25 19:44:35 EDT 1999 | Dave F
| Does anyone have any information on stencil aperture/pad ratios for noclean solder paste. In the past I have experienced severe solder ball problems when using the same size apertures from aqueous products as I do with the No-clean products. Cons
Electronics Forum | Fri Aug 27 13:31:47 EDT 1999 | swsng
1.5 FATOR FOR 20MILS QFP REDUCE 2 MILS HEEL AND INCREASE 2MIL AT TOES AT SIDES -1MILS EACH. SWSNG
Electronics Forum | Thu Apr 22 12:54:28 EDT 2004 | Chris Lampron
Hi Indy, Loctite has a product called 7360 for cleaning uncured epoxies. We had a similar problem and then found out that the alcohol actually caused the epoxy to start setting making it impossible to clean. We now spray with 7360, wipe off with dry
Electronics Forum | Sun Jul 15 17:48:51 EDT 2001 | kerryn
You should check the archives, there has been much written on this subject in the past. Asking about the correct chemistry is wise. It never ceases to amaze me how many people think ultrasonics will work without the proper chemistry. Without the rig
Electronics Forum | Thu Apr 22 10:43:25 EDT 2004 | tigerlordgm
We had a great deal of trouble cleaning adhesive residue from stencils using an alcohol stencil washer. Same kind of thing, adhesive build-up in aperture corners. The solution we came up with was to convert our stencil washer to run Zestron ES200, a
Electronics Forum | Tue Mar 27 13:53:11 EST 2001 | gcs
Ultrasonic I understand maybe the best at cleaning stencils, but we use a "pressure spray" it works very well and only takes appx. 12 minutes to wash & self dry. Alcohol is the cleaner, but there are several company's making detergents for cleaning
Electronics Forum | Wed Aug 25 21:51:13 EDT 1999 | Jason Tomlinson
| Does anyone have any information on stencil aperture/pad ratios for noclean solder paste. In the past I have experienced severe solder ball problems when using the same size apertures from aqueous products as I do with the No-clean products. Cons
Electronics Forum | Thu Apr 22 10:56:16 EDT 2004 | tigerlordgm
I apologise for the bad info, I read off the wrong column. We use Zestron SD300 in the stencil washer, we use Zestron ED200 in other hand wash applications. Sorry for the confusion.
Electronics Forum | Mon Feb 10 10:39:39 EST 2020 | slthomas
As has already been suggested, make sure you are cleaning your stencil well between long periods of inactivity. That said, it sounds to me like you have a feeder problem to solve before you get too wrapped up in what to do with your printing process
Electronics Forum | Tue Apr 20 20:33:38 EDT 2004 | davef
You're correct, alcohol can cure or cause reactions in epoxies. While you're waiting for others to reply: * Read your glue supplier's application notes. They often discuss cleaning procedures and materials. * Consider searching the fine SMTnet Arch
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