Steve, I've seen images like this long ago. . . caused then by rework of solder mask. Most things that strip solder mask also do a number on the "butter coat". Shows up first at the thinner "knuckle" of the glass weave. Greg Anderson Senior Advanced Manufacturing Engineer GE Fanuc Automation Charlottesville, VA 22911 Phone: 804-978-5181 FAX: 804-978-5898 e-mail: [log in to unmask] -----Original Message----- From: Stephen R. Gregory [mailto:[log in to unmask]] Sent: Tuesday, July 17, 2001 9:56 AM To: [log in to unmask] Subject: [TN] Weave Exposure... Hi Everyone! I've got some boards in here that has what I believe to be weave exposure, and I think it's bad enough to reject the boards. Go to: http://stevezeva.homestead.com/index.html and tell me what you think. What causes something like that? -Steve Gregory- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------