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Wed, 4 Dec 2002 10:49:47 +0200 |
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Larry,
I am not sure about 12%. By one hand, a lot of chemistries for copper
plating produce copper arround 20% of elongation.By other hand, I still
remeber figures arround 7% as minimum.
Determination of elongation is a little bit tricky : includes thermal
treatment of the foil for recrystalisation and very carefull preparation of
the sample to avoid scraches .
Edward
Edward Szpruch
Eltek Ltd
P.O.Box 159 ; 49101 Petah Tikva Israel
Tel ++972 3 9395050 , Fax ++972 3 9309581
e-mail [log in to unmask]
> -----Original Message-----
> From: [log in to unmask] [SMTP:[log in to unmask]]
> Sent: ג דצמבר 03 2002 23:04
> To: [log in to unmask]
> Subject: Re: [TN] via cracking
>
> Russ,
>
> I would add just one more cause. If the copper has a low elongation, less
> than 12%, it can be brittle enough to crack.
>
> Larry
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