Electronics Forum | Mon Jan 24 16:37:26 EST 2000 | Kris W
To all, This may appear to be laziness on my part, but I need to ask for some advice. We are in the process of qualifying no-clean solder paste to replace or current RMA paste. I have performed qualification runs and extensive reliability testing
Electronics Forum | Tue Jan 25 13:06:47 EST 2000 | Bill Schreiber
When switching from cleaning RMA to a no-clean flux, one area that is commonly overlooked is the stencil cleaning operation. Stencil cleaners that are effective in cleaning RMA often fail when cleaning no-clean (especially alcohol cleaners). Pallet
Electronics Forum | Tue Jan 25 15:13:34 EST 2000 | Dave H
Kris, Weigh very carefully the above caveat with regard to IPA. I would ask for documentation to substantiate this claim, which likely stems from a desire to sell "his" chemistry, while "slamming" competition. I'll be happy to run some tests for you
Electronics Forum | Tue Jan 25 09:25:23 EST 2000 | Dave F
Kris: I can appreciate your hesitance. Done correctly with proper planting and fore thought, the change to no-clean affects every part of your operations operations from purchasing to receiving and on down the line. Two things: 1 Following with y
Electronics Forum | Thu Jul 14 00:54:53 EDT 2005 | Pyramus
Hi production encountered a problem today. There have been a mix-up of solder paste. We are currently running clean process in one side of board. Unfortunately when PD run the other side process they were able to used a wrong no-clean solder paste.
Electronics Forum | Sat Jul 16 03:59:31 EDT 2005 | pyramus
Electronics Forum | Thu Jul 14 01:43:09 EDT 2005 | pyramus
Solder paste used was Kester FL250M (no-clean).... components affected were only chip components 0603, no BGA & no IC components.
Electronics Forum | Mon Jul 18 00:00:35 EDT 2005 | adlsmt
I have nothing to add technically but we have been washing no-clean for years. Use very clean filtered DI water to avoid the white residue issue and some good detergent or sopanifier and you will get great results.
Electronics Forum | Thu Jul 14 13:45:32 EDT 2005 | slthomas
We've only seen it done by accident, and the result was a lot of white flux residue. You do need to make sure you get it all off, and to do so most likely means using a saponifier like sara suggested.
Electronics Forum | Thu Jul 14 16:07:16 EDT 2005 | saragorcos
Here is a link to a specific article about cleaning no-clean assemblies: http://www.residues.com/pdfs/Clean_No_Clean.pdf Our facility does a lot of contract cleaning and cleanliness testing for various companies around the world, and that study s