Method of fabricating glass substrate for magnetic disk and meth

Details Method of fabricating glass substrate for magnetic disk and meth Method of fabricating glass substrate for magnetic disk and meth

1997-12-29

2000-10-24

Vincent, Sean

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 31, C03C 2100

Patent

active

061349186

ABSTRACT:
The surface of a glass substrate withdrawn from a chemically strengthening treatment liquid is processed with a heated acid (for example, a thermal concentrated sulphuric acid at a temperature of over 100.degree. C., or a water soluble organic solvent such as glycerol or polyethylene glycol). Consequently, precipitated fused salt can be effectively removed without damaging the glass substrate and the change in quality of the glass surface can be also prevented at a high level.

REFERENCES:
patent: 3656922 (1972-04-01), Budd
patent: 3873344 (1975-03-01), Church et al.
patent: 5654057 (1997-08-01), Kitayama et al.
patent: 5804317 (1998-09-01), Charrue
Abstract, JPO, Kojima, Takeshi, JP 9-22525A, Jan. 1997.

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