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An improved process is described for effectively cleaning NOVACULITE Trademark of Agsco Corp. deposits on substrate surfaces prior to plating.
English (United States)
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Pre-Clean Treatment for Prevention on Nodular Electroless Nickel Plating
An improved process is described for effectively cleaning NOVACULITE
Trademark of Agsco Corp. deposits on substrate surfaces prior to plating.
It has been found that for effective substrate cleaning, a relatively thick slurry
is required in conventional vapor blast cleaning processes. The slurry is a
mixture of water and NOVACULITE (grit) particles. It has been observed that
residual grit particles tend to adhere to the substrate surface after vapor blast
and are not effectively removed by conventional cleaning processes previously
employed. The formation of gritty deposits, as well as bridring defects, were
observed during the subsequent nickel plating on the substrates with adhered
The previously employed cleaning process steps were as follows:
1. Vapor blast
2. Rinse and dry
3. Plasma ashing
4. NEUTRACLPAN Trademark of Shipley Co., Inc.
The modified cleaning process described here is as follows:
1. Vapor blast
4. Rinse and dry
5. Plasma clean
The modified cleaning process has been shown to provide increased first-