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August 2005

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Subject:
From:
Ellsworth Berkowitz <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Ellsworth Berkowitz <[log in to unmask]>
Date:
Fri, 12 Aug 2005 15:22:56 -0500
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How are the contact pads finished today?  ENIG or hard (electrolytic) gold?

Are these high-wear contacts or one-time/limited cycle points?

Where are the contact pads located on the board?

We have some older products that have hard gold finger edge contacts; I
believe some of these boards (originally HASL) were converted to OSP and
thus were selectively plated.

I wouldn't expect the cost delta for OSP/hard gold to be significantly
different from ENIG/hard gold (another opportunity to engage with
purchasing!).  My assumption is your application uses hard gold for contact
surfaces.

Ellsworth D. Berkowitz, P.E.

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