Process for polishing surface of memory hard disc

Details Process for polishing surface of memory hard disc Process for polishing surface of memory hard disc

1987-08-05

1988-09-06

Clingman, A. Lionel

Abrasive tool making process, material, or composition

Miscellaneous

106 3, B24D 300

Patent

active

047690461

ABSTRACT:
A composition for polishing a layer of non-electrolysis nickel plating, an alumite layer or an aluminium substrate in a memory hard disc, the composition comprising water, a polishing agent of aluminium oxide, and a polishing accelerator of one of nickel nitrate and aluminium nitrate, or two compounds, nickel nitrate and aluminium nitrate, or two compounds, nickel sulfate and aluminium nitrate.

REFERENCES:
patent: 3930870 (1976-01-01), Basi
patent: 4021263 (1977-05-01), Rosenblum
patent: 4225349 (1980-09-01), Koshiyama et al.
patent: 4475981 (1984-10-01), Rea
patent: 4601755 (1986-07-01), Melard et al.

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