Process for polishing surface of memory hard disc
US4769046A · kind A · utility
23Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1987 |
| Grant date | Sep 6, 1988 |
| Priority date | — |
| Expiry date | Aug 5, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09G1/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.