Method for manufacturing an information memory disk

Details Method for manufacturing an information memory disk Method for manufacturing an information memory disk

1982-07-09

1984-03-06

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 401, 264107, 264155, 264219, 425810, B29D 1700

Patent

active

044353430

ABSTRACT:
A method for manufacturing an information memory disk comprises a process for preparing a die having an annular first rugged portion corresponding to tracks, and an annular second rugged portion corresponding to a positioning mark and concentrically located against the tracks, a process for manufacturing by the use of the die a blank having an annular rugged tracks corresponding to the first rugged portion and an annular rugged positioning mark corresponding to the second rugged portion, a process for detecting the position of the center of the blank on the basis of the positioning mark, a process for boring a hole centering around the center of the positioning mark through the blank, and a process for forming a light reflecting layer on the annular rugged track.

REFERENCES:
patent: 3875024 (1975-04-01), Picquendar
patent: 4038009 (1977-07-01), Toull
patent: 4354988 (1982-10-01), Bricot

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