Yud wrote:
> 
> Hi Technetters,
> 
> I'm interested in applying a test method for adhesion of layers in a multilayer.
> I used to do a peel test and it worked fine with Teflon and even FR-4 layers
> but Polyimide layers are just too
> brittle to bend and peel. So instead I wish to do a "Lap shear test".
> 
> Can anybody help me out by pointing me to an applicable standard test method?
> 
> Thanks,
> Yehuda

We've performed a variation on ASTM D 3846 on PWB materials for clients 
in the past.  The method involves notching opposite sides of the 
specimen to the center plane.  The specimen is then compressed in a side 
supporting jig so the center plane between the notches is in shear.  For 
any hope of meaningful data the specimen must be uniform (no holes or 
innerlayer traces in the test section).  Please feel free to call me if 
you'd like more information. 

John Moylan
President

Delsen Testing Laboratories, Inc.
1024 Grand Central Ave.
Glendale,  CA  91201

Phone:	818 247 4106
FAX	818 247 4537
email:	[log in to unmask]
URL:	http://www.primenet.com/~delsen/

Delsen Testing Laboratories, Inc. is an independent testing
laboratory primarily engaged testing advanced materials.

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