Coating processes – Measuring – testing – or indicating
Patent
1985-06-03
1986-12-02
Smith, John D.
Coating processes
Measuring, testing, or indicating
427 10, 4274431, C23C 1816
Patent
active
046264469
ABSTRACT:
Method and apparatus for determining the deposition capability of an electroless metal plating bath by monitoring the difference in instantaneous electrical potential between a pair of test coupons immersed in the bath in which one coupon is seeded to initiate plating thereon of the bath metal and the other coupon has a surface of the bath metal. The magnitude of the difference in potential and its change with respect to time during concurrent immersion of both coupons indicate the probable rate and quality of the bath deposition onto work pieces.
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Greene, "Evaluating the Condition of Electroless Plating Baths", IBM TDB, vol. 7, No. 3, Aug. 1964.
Tucker, "Instrumentation and Control of Electroless Copper Plating Solutions", Design and Finishing of Printed Wiring and Hybrid Circuits Symposium, Ft. Worth, Texas, Jan. 21-22, 1976.
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Capwell Robert J.
Rickert Robert G.
Bardales Norman R.
International Business Machines - Corporation
Smith John D.
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