A bit of a wild guess. How are you storing the material? Could there be a humidity problem in your short term storage? I would imagine that HASL would highlight any moisture problems. Phil. At 15:25 19/08/99 -0500, you wrote: > Here's one for you guys, and gal's. We are witnessing measling in >sporadic fashion. It usually occurs along the edge of the panel, >sometimes encroaching on the boards, sometimes not. We have already >contacted our supplier, for their huh hum, expertise. We pulled and >reviewed again, all process records. There has been no change in the >process. Verification and calibration records reflect proper equipment >function. This is happening with 7629 pre-preg in 12 x 18 and 18 x 24 >sizes We had pulled the material with the same lot number, the problem >went away just as quick. Well, it repeated itself a week or two later, >again we switched to a different batch of material, the problem went away. > With the supplier on-hand, we laid up a book using pre-preg from the >batch we had earlier observed measling from, as well as from another >batch, there were not any measles observed, we repeated this, and again >there were measles. We went back to the process, re-checked everything, >still no significant changes. Our supplier has been in-house for three >days running experiment's, they even brought someone in to assist him, >they are just as puzzled. Samples have been sent to Microtek Labs for >their analysis/opinion, no response so far. Just wondering, does anyone >out there want to take a shot at this one. Thanks, Franklin D Asbell =============================================================== Phil Dutton C.I.D. Senior CAD Technician IPC Certified Interconnect Designer Vision Abell Pty Ltd Second Avenue, Technology Park, Mawson Lakes. SOUTH AUSTRALIA 5095 Phone : (08) 8300 4400 (reception) (08) 8300 4481 (direct) Fax : (08) 8349 7420 email: [log in to unmask] Internet Page: http://www.vsl.com.au =============================================================== ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################