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 --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask]<mailto:[log in to unmask]> with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]<mailto:[log in to unmask]>: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]<mailto:[log in to unmask]>: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives<http://listserv.ipc.org/archives> Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16<http://www.ipc.org/contentpage.asp?Pageid=4.3.16> for additional information, or contact Keach Sasamori at [log in to unmask]<mailto:[log in to unmask]> or 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------