The test equipment we use is:
     
     Industrial Instruments Inc.
     Cedar Grove, NJ
     Serial #432
     Model PA5 152x23
     
     This machine allows us to control the rate that the voltage 
     increases. The test proceeds at ever increasing voltages 
     until the dielectric fails (it actually burns through), and 
     the test probes short out to each other.
     
     The samples need to have all of the copper removed. They 
     also have to be large enough that the voltage cannot track 
     across the surface and short out around the edges.
     
     Good luck!
     
     
     Andy Magee - Applications Engineer
     Rogers - Circuit Materials
     Tel: (602) 917-5237
     Fax: (602) 917-5256
     E-Mail: [log in to unmask]
     Website: http//www.rogers-corp.com/cmu
     
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______________________________ Reply Separator
_________________________________
Subject: ASTM D149
Author:  KoizumiT::(KOIZMT) at ~FABRIK
Date:    12/9/96 2:17 AM


From: KoizumiT
Date: Mon, Dec 9, 1996 2:17 AM
Subject: ASTM D149
To: TechCMU
     Dear Mr.Andy Magee
     
     Thank you for your advice concerning the measuring method of 
     Dielectric Breakdown Voltage of FPC.
     I will study again the ASTM, with the latest version.
     I guess my confusion for D149 comes from language problem because ASTM
      use less figures than IPC standard. It is hard for us to imagine the
     apparatus and test pattern to be used for the test. 
     Thanks again.
     
     Best Regards,
     Toru Koizumi
     [log in to unmask]
     
     

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