Method of correcting nonalignment of a storage disc

Details Method of correcting nonalignment of a storage disc Method of correcting nonalignment of a storage disc

1997-07-30

1999-03-30

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Light polarizing article or holographic article

264 138, 425810, B29D 1100

Patent

active

058884335

ABSTRACT:
In a technique for bonding two disc-shaped resin substrates constituting the storage disc, the disc-shaped resin substrates are centered to correct the nonalignment therebetween. The method includes steps of placing disc-shaped resin substrates, which have central holes and adhesive interposed therebetween, on a centering holding table provided with a boss, spreading the boss inserted into the central holes of the disc-shaped resin substrates outwardly to center the disc-shaped resin substrates, and partially irradiating the adhesive interposed between the disc-shaped resin substrates with UV rays for curing the disc-shaped resin substrates in the vicinity of the centers thereof to temporarily fix the disc-shaped resin substrates. The nonalignment between the disc-shaped resin substrates is corrected, thereby increasing the quality of the storage disc. Further, the boss inserted into the central hole of the storage disc is used to center the disc-shaped resin substrates, which prevents the apparatus from being complex and expensive to manufacture.

REFERENCES:
patent: 4704181 (1987-11-01), Kubo
patent: 4877475 (1989-10-01), Uchida et al.
patent: 5069155 (1991-12-01), Kunze-Concewitz et al.
patent: 5197060 (1993-03-01), Yatake
patent: 5273598 (1993-12-01), Higasihara et al.
patent: 5744193 (1998-04-01), Kitano

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