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Date: | Mon, 27 Jun 2005 12:42:25 -0400 |
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David,
I have used "Vigon US" for no-clean flux removal. It does a superb job, but maybe there is something better suited to your application.
I make no commission :-) They have been very helpful in the past
Steve Creswick - Gentex Corp
Here is the contact info:
Umut Tosun, M.S.Chem.Eng.
Application Technology Manager
Zestron America
21641 Beaumeade Circle
Suite 315
Ashburn, VA 20147
Phone (703) 589 1198 ext-102
Cell (703) 608 9029
Toll Free. (888) 999 9116 ext-102
Fax (703) 821 9248
E-mail [log in to unmask]
-----Original Message-----
From: David Tremmel [mailto:[log in to unmask]]
Sent: Monday, June 27, 2005 12:00 PM
To: [log in to unmask]
Subject: [TN] Flux residues
Technetters,
I have received some microBGAs which I have to reball and they have a
no-clean flux residue which is difficult to remove. Also, when it comes in
contact with our water-soluble flux it creates an acid which is not very
'friendly' to the part.
Would any of the chemical gurus care to edify one of the uneducated ones why
no-clean flux, when dried and allowed to set for a couple of months is so
difficult to completely remove and what possible acids or chemicals are
created when it is combined with water-soluble flux (type ORM1)?
As always, I appreciate the responses I receive.
David Tremmel
Technical Manager
BT Mexico
_________________________________________________________________
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