Multi-layer optical recording medium manufacturing method

Details Multi-layer optical recording medium manufacturing method Multi-layer optical recording medium manufacturing method

1995-08-31

1998-10-13

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Light polarizing article or holographic article

264106, 425810, 425812, B29D 1100, B29D 1700

Patent

active

058207945

ABSTRACT:
A multi-layer optical recording medium manufacturing method and apparatus thereof forms a resin layer having a second recording layer on a first recording layer. The first recording layer includes a reflecting layer and a first recording layer sequentially formed on a transparent substrate. The multi-layer optical recording medium manufacturing apparatus includes an upper and a lower mold on which is respectively fixed the transparent substrate and a stamp such that they are facing each other. Communicating holes formed in the transparent substrate and the stamp are formed in center portions of each of the molds. A punch member capable of vertical movement is established in the communicating hole of the lower mold, and resin supply established in the communicating hole of the upper mold. The above apparatus has the advantage of improving productivity of the manufacture of a multi-layer optical recording medium.

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patent: 4898529 (1990-02-01), Muchnik et al.
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patent: 5635114 (1997-06-01), Hong
M. Ross, "Taking Optical Storage to Higher Levels," IBM Research Magazine, No. 2, 1994, pp. 14-17.
"3M Announces Dual-Layer Construction Process For High-Density DC-ROM," 3M News, Nov. 14, 1994 (3 pages).

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