It changed when the pedants took over and demanded greater perceived precision through change of emphasis. CTE is deemed to be more scientifically correct than TCE (so my teach told me many moons ago (NPI)). TCE = Thermal Co-efficient of Expansion as opposed to any other co-efficient of expansion, while CTE = Co-efficient of Thermal Expansion as opposed to a co-efficient of expansion caused by anything else. The idea is to place the emphasis on the 'Co-efficient' bit, not on the 'Thermal' bit ... or something. I'm just bored and just wanted to say something, OK? Peter Earl Moon <[log in to unmask] To: [log in to unmask] M.COM> cc: (bcc: DUNCAN Peter/Asst Prin Engr/ST Sent by: Aero/ST Group) TechNet Subject: Re: [TN] Cracking Chip Resistors <[log in to unmask] ORG> 04/17/02 01:28 AM Please respond to "TechNet E-Mail Forum."; Please respond to Earl Moon Steve, You really are an old timer. TCE instead of CTE? I still use the former. When did it all change? Earl --------------------------------------------------------------------------------- Technet 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 Technet To temporarily halt delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL 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 --------------------------------------------------------------------------------- [This e-mail is confidential and may also be privileged. If you are not the intended recipient, please delete it and notify us immediately; you should not copy or use it for any purpose, nor disclose its contents to any other person. Thank you.] --------------------------------------------------------------------------------- Technet 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 Technet To temporarily halt delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL 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 ---------------------------------------------------------------------------------