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July 2004

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Subject:
From:
Jeffrey Bush <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 6 Jul 2004 10:05:52 -0400
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Depends on the thickness of the mask - is it a thin residue or is it a
deposit yielding the same thickness as the general coating?

Thin residues can be removed by solvents (MEK, etc) with a q-tip.
Thicker deposits will need abrasion by hand (the method depends on the
hardness - brass or fiber brushes work well - but a exacto #12 is fast
and most effective).  Laser is the easiest and most costly for thicker
deposits - you will need the data for the mask layer and hope it is a
common location.



Jeffrey Bush
Director, Quality Assurance and Technical Support

                          76 Technology Drive - POB 1890
                             Brattleboro, Vermont 05302-1890
                                Tel. 802.257.4571.21 Fax. 802.257.0011
                                    [log in to unmask]
                              http://www.vtcircuits.com	



-----Original Message-----
From: Ken Patel [mailto:[log in to unmask]] 
Sent: Tuesday, June 29, 2004 7:41 PM
To: [log in to unmask]
Subject: [TN] Soldermask on PTH pad???
Importance: High


Technetters,

We have pads of hand soldering locations covered with solder mask making
it difficult to solder. Is there any other way to solder besides
scarping the solder mask (abrasive) and use solder fountain? I am
looking for any easy way to remove solder mask or soldering technique.



Any help will be highly appreciated.



Re,

Ken Patel


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