Actually the GEE term is from the MIL-I-24768 which is the spec for unclad laminates. The following is from that spec: 1.2.1 Types. The types of insulation grouped according to the base material used, shall be as follows: a.... b. Glass Fabric, Base, Epoxy-Resin Binder GEE Glass Fabric Base, Epoxy Resin, Electrical Grade GEB Glass Fabric Base, Epoxy-Resin, High Temperature Electrical Grade GEE-F Glass Fabric Base, Epoxy-Resin, Flame Resistant, Electrical Grade GEB-F Glass Fabric Base, Epoxy-Resin, High Temperature, Flame Resistant, Electrical Grade For all intents and purposes I believe the GEE is the same as the NEMA Grade G-10 or Mil Spec GEN, and the GEE-F is the same as the NEMA Grade FR-4 or Mil Spec GFN. The GEB is the G-11 and the GEB-F is FR5. Hope this helps. Mary Muller > ---------- > From: Stephen R. Gregory[SMTP:[log in to unmask]] > Reply To: TechNet E-Mail Forum.;[log in to unmask] > Sent: Wednesday, September 20, 2000 10:00 AM > To: [log in to unmask] > Subject: [TN] Mil laminate designations... > > Hi all!! > > What does the last "E" in the Mil designation type "GEE" laminate stand > for? > I though it was the color...for instance "GEN" would be a G-10 natural > color, > right? > > Also, is there any real difference in "GE" vs. "GF" laminate material? > > Thanks! > > -Steve Gregory- > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8d > ############################################################## > 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 1.8d ############################################################## 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 ##############################################################