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September 2001

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Subject:
From:
Shirley Xiao <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 20 Sep 2001 17:19:14 -0700
Content-Type:
text/plain
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text/plain (57 lines)
I guess you missunderstood the TM-650. I think the
difference is between double sided and single sided or
even unclad board right after press by laminator.
There is no big difference if compare a double sided
board with clad and withou copper foil by etching.




--- Gerard O'Brien <[log in to unmask]> wrote:
> When testing Tg with DSC, the TM-650 test method
> calls out for the test to
> be run with the copper clad still attached and that
> if removed to expect an
> 8 to 15 degree reduction in values. For DMA it does
> not reference testing
> with copper clad or removed. Can anyone give me the
> reason why?
>
> Regards
>
> Gerard O'Brien
>
>
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