The IPC-RF-245, "Performance Specification for Rigid-Flex Printed Boards" 
would be the document you need. The test methods refered to in this 
document are included in the back.

The RF-245 gives the following information:

Insulation resistance
		Class 2		Class 3
As received	500 megohms	500 megohms

After exposure
to moisture	100 megohms	500 megohms


Dielectric withstanding test voltages
		Class 2		Class 3
Voltage		500 VDC		500 VDC

Time		30 sec		60 sec

There are no requirements for class 1 on either of these.


The RF-245 is in the process of being re-written. It's new number will be 
IPC-P-6013. Anyone interesting in perticipating on this flex document can 
contact me. Will are planning an interim meeting the week of August 14 in 
Minneapolis.

****************************************************
Jon Holmen
Technical Project Manager
IPC
7380 N. Lincoln Ave
Lincolnwood IL  60646
Phone (708) 677-2850
Fax   (708) 677-9570
e-mail  [log in to unmask]
*****************************************************



On Mon, 10 Jul 1995 [log in to unmask] wrote:

> What standard do you recommend for purchasing Rigid-Flex Mother Boards.  
> 
> I particularly need information on testing the bare board.   What should the
> values be for isolation resistance and voltage?
> 
> Thanks.
> 
> Lew Burnett
> Honeywell
> 602-436-4744
> [log in to unmask]
> 
>