---------------------------- Forwarded with Changes --------------------------- From: Administrator at Rogers-MCD Date: 4/1/96 9:23AM To: Art Aguayo at Rogers-MCD Subject: Message not deliverable ----------------------------------- Returned ----------------------------------- From: Art Aguayo Date: 4/1/96 9:22AM *To: 27=technet::[log in to unmask]::25=SMTP at ~FABRIK *To: smurthy::(SMRTHY) at ~FABRIK Subject: Re: RF substrates - test vehicles ------------------------------------------------------------------------------- The industry standard test for dielectric constant is IPC-TM-650 2.5.5.5. This is a stripline test usually done at 10 GHz. Unfortunately, the test needs material free of copper and a certain thickness of ground plane spacing is needed. At Rogers, manufacturer of various types of microwave/RF laminates (PTFE and non-PTFE based), we have found this to be the most repeatable test of the ones we have evaluated (microstrip, waveguide insertion test, HP dielectric probe). I don't know if what you need to do can be done using 2.5.5.5, but if you want to talk give me a call. Currently I'm travelling but should be back April 8. Art Aguayo, Technical Services/Applications Engineer [log in to unmask] http://www.rogers-corp.com ______________________________ Reply Separator _________________________________ Subject: RF substrates - test vehicles Author: smurthy::(SMRTHY) at ~FABRIK Date: 3/26/96 12:32 PM From: [log in to unmask] Date: Tue, Mar 26, 1996 12:32 PM Subject: RF substrates - test vehicles To: technet From: Sasi Murthy 448-5688 (tie 778) Subject: RF substrates - test vehicles I am in the process of investigating high frequency RF substrates with respect to assembly processes, etc and am looking for any available test vehicles that would allow measurement and testing of the substrate after multiple reflows (i.e for warpage, SIR, variation in dielectric constant, etc..) I am interested in looking at variations of teflon substrates. Does anyone know of available vehicles ? Thanks in advance. Regards, Sasi Process Applications Engineer (416) 448-5688, fax (416) 448-4736 [log in to unmask]