Polishing composition for memory hard disc
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United States of America Patent
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Nov 10, 1987
Grant Date -
N/A
app pub date -
May 21, 1986
filing date -
Jul 25, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A composition for polishing a layer of non-electrolysis nickel plating, an alumite layer or an aluminum substrate in a memory hard disc the composition comprising water, a polishing agent of aluminum oxide, and a polishing accelerator of one of nickel nitrate and aluminum nitrate, or two compounds, nickel nitrate and aluminum nitrate, or two compounds, nickel sulfate and aluminum nitrate.
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