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March 2000

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From:
Jonathan A Noquil <[log in to unmask]>
Date:
Thu, 2 Mar 2000 09:21:53 +0800
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"TechNet E-Mail Forum." <[log in to unmask]>, Jonathan A Noquil <[log in to unmask]>
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Hello Guys,

Has any one knows about Ni-Pd plating on lead frames.
We are experiencing cracks on leads after trim and form in most of our new
packages.
Does anybody knows any equipment to determine the tension applied during trim
and form. I guess we need to adjust the force applied to prevent cracking
(S=F/A), however if anybody can recommend type of plating with the same property
as the tin lead plating (high ductility). Since tin-lead plating did not show
any traces of craks after trim and from.
Our plan is to eliminate tin-lead plating (go for lead free).

Appreciate any inputs

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