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Subject:	Posting cleaning question for IPC user
From:	Jack Crawford <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, Jack Crawford <[log in to unmask]>
Date:	Tue, 15 Mar 2011 09:48:36 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (41 lines)

As Jean-Francois notes, his company policy doesn't permit him to subscribe to technet. If anyone has any suggestions or ideas, please also send your comments to him when you reply to TechNet.

Thanks
Jack Crawford
IPC

From: Jean-Francois Bissonnette [mailto:[log in to unmask]]
Sent: Tuesday, March 15, 2011 9:36 AM
To: Jack Crawford
Subject: Cannot go on technet... but I have a question.

Hello M. Crawford,

I once was a member of IPC.  Since I changed company, I do not have the same liberty and right now I find myself with a problem that I never had before.

After assembling a IC with Water Soluble flux and washing the board in hot water, I find some kind of greasy residue... looks like syrup a little bit.  It does not seem to dry over a few days.  I have no clue and like I said, I don't have access to Technet at the moment.  (cie policy).

Important ICs are hand soldered and hand washed with a brush under the hottest water possible.  They are dried with compressed air.  The residue does not show up anywhere else than around the IC.

Would you have any idea on what it is and/or how to confirm what it is?

Thanks a million!

Jean-François Bissonnette
DEPRO Électronique Inc
755, Curé-Boivin suite 101
Boisbriand, Québec
Canada     J7G 2J2
Ph. 450.430.6251  Poste/Ext: 109
Fax: 450.430.6251

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