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December 2002

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Subject:
Re: via cracking
From:
Edward Szpruch <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 4 Dec 2002 10:49:47 +0200
Content-Type:
text/plain
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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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