Are you refering to Hardness of FR4.  If yes,  hardness of bare laminate?




"Pelkey, Glenn" <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
07/25/01 06:10 AM
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Glenn"


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        Subject:        [TN] Compression Strength Limit of FR-4


Hi friends,
        Here's one you don't get asked very often.  What is the z-axis compression
strength limit of FR-4?  Not looking at Flexural Strength, unless you
think there's a way of correlating the two.
Thanks,
Glenn