I would suggest you look at IPC-A-610C Sections 10.2.1. which has detailed information on measling and crazing. I would also look at Section 10.2.2 which addressing delamination and blistering. Causes are explained in these sections. Gregg A. Owens Executive Director Manufacturing Technology Training Center, Inc. 10427 San Sevaine Way, Suite "I" Mira Loma, CA 91752 Phone: (909) 360-1324 Fax: (909) 360-1346 Website: www.mttc-inc.com -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Efendy Wijaya Sent: Tuesday, August 06, 2002 9:12 AM To: [log in to unmask] Subject: [TN] PCB Laminate Defects: Measles Hello all, Anybody knows about PCB laminate defect called measles? What are the causes, prevention, remedy? We just finished wave soldering a PCB and there are some white spots (kinda like spiderwebbing) that are from inside the PCB laminate. I assumed this is measles (I've never seen one before). Anybody knows if this is caused by high temperature, bad lamination, etc...? Any cure? ------------------------------------------------------------------------ --------- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ------------------------------------------------------------------------ --------- --------------------------------------------------------------------------------- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------