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September 1999

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Subject:
Warpage on a thin PCB
From:
Nicholas LAI <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 9 Sep 1999 16:42:03 +0800
Content-Type:
text/plain
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text/plain (30 lines) 
Hello all

It is an old topic on the bow or twist of PCB....
In IPC-TM-650 2.4.22 rev B has stated the testing method....
But I want to know that whether it is appliable on Thin PCB such thichness is
smaller than 0.020".
As when I try to use the testing methos to test the warpage. The degree of bow
or twist will be reduces due to
weight of the board.

Can anyone tell me how to do the test on a thin PCB?

Best Regard,
Nicholas Lai
9/9/99

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