Ron, These are the commonly used FR-4 in 4101. 4101/25 is for GETEK. The rest are different temp FR-4. Robert -----Original Message----- From: King, Ron [SMTP:[log in to unmask]] Sent: Thursday, June 20, 2002 12:37 PM To: [log in to unmask] Subject: [DC] IPC -4101/?? << File: ATT00005.htm >> Does anyone have a good explanation of what versions of 4101 material are commonly used and the differences between them? Thanks, -Ron King --------------------------------------------------------------------------------- DesignerCouncil 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 DesignerCouncil. To set a vacation stop for delivery of DesignerCouncil send: SET DesignerCouncil 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 ---------------------------------------------------------------------------------