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Date: | Tue, 14 Sep 2004 12:53:55 -0400 |
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Are you using TIN/LEAD or TIN as an etch resist?
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: - Bogert [mailto:[log in to unmask]]
Sent: Monday, September 13, 2004 5:16 PM
To: [log in to unmask]
Subject: Re: [TN] (2)PWB Conductive Contamination Under Solder Mask;
What Can ...
The scotch brite is used to clean the surface to allow better adhesion
of the soldr mask.
----- Original Message -----
From: Susan Mansilla<mailto:[log in to unmask]>
To: [log in to unmask]<mailto:[log in to unmask]>
Sent: Monday, September 13, 2004 2:10 PM
Subject: Re: [TN] (2)PWB Conductive Contamination Under Solder Mask;
What Can ...
Hi Mike and All
I am familiar with the abrasive wheel cleaning processes. but those
are done
AFTER the tin/lead has been stripped. The response I got indicated
that the
abrasive was used on the Tin/Lead deposit, which didn't follow my idea
of a
possible process flow.
Some PCB fab shops continue to use a "Scotch Brite" style of
abrasive wheel or brush as a final surface prep operation prior to
soldermask application.
Susan Mansilla
Robisan Lab
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