Process for manufacturing a crystallized glass substrate for mag

Details Process for manufacturing a crystallized glass substrate for mag Process for manufacturing a crystallized glass substrate for mag

1996-10-01

1998-08-04

Chin, Peter

Glass manufacturing

Processes

Operating under inert or reducing conditions

65 323, 65 331, 65 63, 65102, C03B 27012, C03B 3200, C03B 2100, C03B 2300

Patent

active

057887314

ABSTRACT:
A process for producing a crystallized glass substrate for magnetic disks, including the steps of: (a) holding an amorphous glass plate having a uniform thickness and two principal flat surfaces thereof between a pair of pressing setters in a sandwiched fashion, which pressing setters are non-reactive with the amorphous glass and undeformable during heating for crystallization of the amorphous glass; (b) softening the amorphous glass plate in a sandwiched stack form by heating at a temperature above an annealing point of the amorphous glass, whereby the principal surfaces are fitted onto the flat surfaces of the pressing setters to rectify warping to flatten the amorphous glass plate; and (c) then, increasing the temperature to a crystal growth temperature to grow crystals within the amorphous glass, whereby the amorphous glass plate is crystallized as maintaining its warp-free state, followed by solidifying.

REFERENCES:
patent: 3833347 (1974-09-01), Angle et al.
patent: 3998617 (1976-12-01), Gliemeroth
patent: 4118214 (1978-10-01), Wedding
patent: 5147436 (1992-09-01), Blakeslee et al.
patent: 5188677 (1993-02-01), Fukai et al.
patent: 5391522 (1995-02-01), Goto et al.
patent: 5532194 (1996-07-01), Kawashima et al.
patent: 5567217 (1996-10-01), Goto et al.
patent: 5580363 (1996-12-01), Goto et al.

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