The numbers refer to the style of glass cloth used, the number defines the quantity of yarns in the warp & weft, the thickness of the cloth etc. You will find more information at www.bgf.com. look under "fabric reference", "properties", "printed circuit boards", "construction data". Geof Layhe www.lamar-uk.co.uk > ---------- > From: KK Chin[SMTP:[log in to unmask]] > Reply To: TechNet E-Mail Forum.;KK Chin > Sent: 05 May 2000 19:06 > To: [log in to unmask] > Subject: [TN] Prepreg numbering > > A PCB supplier recommended me to fine tune a FR-4 multilayer lay-up to > make use > of certain popular prepreg material. He named the prepregs by numbers like > 7628, > 1652, 1080, etc. Are these numbers common acronym, or just from a specific > manufacturer's catalog? How can I decipher these numbers? > > Thanks, > > K.K. Chin > Artesyn Technologies, > Fremont, CA > > ############################################################## > 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 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 1.8c ############################################################## 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 Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################