Abrasive tool making process – material – or composition – With inorganic material – Clay – silica – or silicate
Patent
1990-04-10
1992-08-11
Smith, James G.
Abrasive tool making process, material, or composition
With inorganic material
Clay, silica, or silicate
156636, 156645, B24D 302
Patent
active
051375443
ABSTRACT:
In the present invention Stress-Free Chemo-Mechanical Polishing Agent For II-VI Compound Semiconductor Single Crystals And Method Of Polishing, a II-VI compound semiconductor single crystal wafer is polished smooth to within 50 angstroms by using a mixture of water, colloidal silica and bleach including sodium hypochlorite applied under time and pressure control to achieve chemo-mechanical polishing. Many such compound crystals are not susceptible to polishing by prior art methods.
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patent: 4428795 (1984-01-01), Kohl
patent: 4448634 (1984-05-01), Lampert
patent: 4475981 (1984-10-01), Rea
patent: 4645561 (1987-02-01), Rea
patent: 4889586 (1989-12-01), Noguchi
Caldwell Wilfred G.
Hamann H. Fredrick
Montanye George A.
Rockwell International Corporation
Smith James G.
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