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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