This prompts another question that I've wondered about -- do the physical properties of polyamide substrates change radically w/ environment? I've heard that water absorption is one issue, for instance. How does this affect k, and things like dielectric withstand voltage?
I would imagine that this makes impedance control somewhat more difficult as well...comments? Thanks in advance. btw: I've enjoyed lurking through the steel chicken and frozen ball discussion (or did I get that backwards?). Timothy J. Christman Test Engineer Guidant Corporation 4100 Hamline Ave. N. St. Paul, MN 55112 USA www.guidant.com Opinions are mine, not those of my employer, etc. -----Original Message----- From: Fred Townsend [mailto:[email protected]] Sent: Thursday, October 04, 2001 1:11 PM To: [email protected] Cc: [email protected] Subject: Re: question of flex circuit materials >From an EMC prospective they are all the same, because they are the same! Kapton is a Dupont trade name for polyamide. Fred Townsend [email protected] wrote: > >From an EMC standpoint, are there any flex circuit materials (e.g., kapton > vs. polyimide vs. other) that are preferred? > > Susan Beard > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
