hi, you need to be aware that polysulfones do not have very good resistance to ketones, aromatic hydrocarbons, and chlorinated hydrocarbons. there may be others they don't like either. phil -----Original Message----- From: Larry J. Fisher [mailto:[log in to unmask]] Sent: Monday, February 26, 2001 3:20 AM To: [log in to unmask] Subject: [TN] Polysulfone I have a customer who is interested in making PWB's with polysulfone (apparently one of their customers requested this). I have done some research and found it is sold under the trade name of Udel and is made by Amoco (actually BP). It is a thermoplastic material and is available with up to 30% fiberglass. My questions are: 1. Does anyone know that the polysulfone is, in fact, used to make circuit boards? 2. What are the properties that are desirable with this material in a circuit board application? 3. If used for circuit boards, would you want to use material with the fiberglass? 4. Can you get copper clad sheets of the polysulfone or do you have to press the copper yourself? 5. If the answer to #4 is yes, where do you get it? Any help out there would be appreciated. Larry Fisher Allen Woods & Associates --------------------------------------------------------------------------------- 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 the following message: SET Technet 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 ---------------------------------------------------------------------------------