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February 1999

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Subject:
Soft gold purity,hardness and bondabilty
From:
Henry Coulter <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 3 Feb 1999 16:23:10 -0800
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I just had my soft gold tank analyzed (foil analysis) . Purity is 99.9%
knoop hardness is 70. Can it be assumed that the parts plated in this tank are wire bondable assuming they are plated at the proper ASF
(1-5 asf) and the gold and nickel thickness is adequate (nickel 100-200. Gold 20-60 microinches)? Parts are cleaned with plasma machine using 100% oxygen at 600 watts for 30 minutes prior to shipping to customer. Any light shed on this subject will be greatly appreciated. Thanks in advance. 

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