Many Moons ago.....(No offense Earl) Some R and D efforts were being demonstrated successfully with plasma etchings PTFE with Helium. (I guess they also did some flex that way too) Anyways....Is anybody still doing this or is it still R and D???????? Curious minds are inquiring...... Dave Hoover ############################################################## 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 ##############################################################