Electricity: electrical systems and devices – Miscellaneous
Patent
1987-12-16
1988-10-25
Griffin, Donald A.
Electricity: electrical systems and devices
Miscellaneous
295701, H01G 900
Patent
active
047807970
ABSTRACT:
A counterelectrode and a method for providing the counterelectrode wherein an inherently high effective capacitance surface is formed on tantalum. The oxide forming ability of the tantalum surface is destroyed by removing existing oxide from the surface, depositing on the surface a non-continuous layer of a platinum family metal, and alloying the deposited metal with the tantalum thereby forming alloy layer. A second layer of metal, also selected from the platinum family, may then be deposited over the alloy layer. Alternately the platinum family metal may be sputtered onto the surface of the tantalum with or without an the alloying step. The second deposition produces a spongy layer and is accomplished by conventional electrolytic techniques.
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patent: 4016465 (1977-04-01), Walters
patent: 4020401 (1977-04-01), Cannon et al.
patent: 4121949 (1978-10-01), Walters
patent: 4159509 (1979-06-01), Walters
patent: 4408257 (1983-10-01), Walters
patent: 4523255 (1985-06-01), Rogers
Metal Finishing, Jan. 1985, pp. 15-17, Cleaning and Preparation of Electronic Materials for Plating.
Griffin Donald A.
Tansitor Electronic, Inc.
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