Method for fabrication of disc substrate

Details Method for fabrication of disc substrate Method for fabrication of disc substrate

1994-03-03

1996-09-03

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming sound grooves in records

264107, 264155, 264161, 2643281, 425289, 425554, 425810, 425810, 425DIG51, B29C 4538, B29D 1700

Patent

active

055520987

ABSTRACT:
An improved method for forming a disc substrate having a bottomed centering hole for rotating and driving the disc. The method includes injecting synthetic resin into a mold cavity formed by a first and second metal molds to form the substrate, and punching at least part of the centering hole by a movable member protruded into the mold cavity to form a through-hole. A stamper containing digital information is held in place inside the mold cavity by its inner circumference by means of a vacuum or a magnet.

REFERENCES:
patent: 3545044 (1970-12-01), Rebovich et al.
patent: 4340353 (1982-07-01), Mayer
patent: 4412805 (1983-11-01), Morrison
patent: 4472124 (1984-09-01), Kashihara et al.
patent: 4707321 (1987-11-01), Segawa et al.
patent: 4737096 (1988-04-01), Poorten
patent: 4772196 (1988-09-01), Asai
patent: 4795127 (1989-01-01), Asai
patent: 4879082 (1989-11-01), Kudo et al.
patent: 4917833 (1990-04-01), Cools
patent: 4961884 (1990-10-01), Watanabe et al.
patent: 5087184 (1992-02-01), Watanabe et al.
patent: 5092758 (1992-03-01), Tanaka et al.
patent: 5092759 (1992-03-01), Lichtinger et al.
patent: 5297951 (1994-03-01), Asai
patent: 5316466 (1994-05-01), Tanaka et al.
Patent Abstracts of Japan, vol. 10, No. 115 (M-474) (2172), 30 Apr. 1986 & JP-A-60 245 529 (Sumitomo Jukikai Kogyo).
Patent Abstracts of Japan, vol. 11, No. 218 (M-607) (2665), 15 Jul. 1987 & JP-A-62 035 820 (Meiki Co.).
Patent Abstracts of Japan, vol. 12, No. 296 (M-731) (3143), 12 Aug. 1988 & JP-A-63-746 18 (Hitachi).
Patent Abstracts of Japan, vol. 16, No. 105 (P-1325), 16 Mar. 1992 & JP-A-03 280 279 (RICOH).

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