Optical disk stamper examination machine, optical disk stamper examination method, and optical disk stamper
AssigneeSeiko Epson Corporation
InventorsKimio Hirono, Hirofumi Kurosawa, Noboru Furuya
Life of this patent
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Abstract
A glass substrate is affixed through an UV-hardening resin to the signal face of an optical stamper and is examined using an optical head having optical constants equivalent to those of a disk examination machine, thus making it possible to obtain characteristic playback examination results equivalent to those obtained from disks manufactured using the optical stamper, wherefore optical stamper quality can be easily assessed.
Claims19
An optical disk stamper examination machine that examines an optical disk stamper, comprising:
- a transparent material composed of a single layer superimposed over the optical disk stamper, the single layer composed of a film-like transparent substance that covers the recording surface of the optical disk stamper being examined;
- and
- an optical head that irradiates the optical disk stamper with a light of a laser beam through the transparent material, and detects a reflected light.
An optical disk stamper examination machine that examines an optical disk stamper, comprising:
- an optical disk stamper;
- a transparent single layer composed of a film-like transparent substance superimposed over a recording surface of the optical disk stamper;
- and
- an optical head that irradiates the optical disk stamper with a light of a laser beam through the transparent substance, and detects reflected light.
An optical disk stamper examination method for examining an optical disk stamper, comprising:
- affixing a transparent material having a single layer composed of a film-like transparent substance over the recording surface of an optical disk stamper;
- irradiating the optical disk stamper with a light of a laser beam through the transparent material;
- and
- detecting a reflected light.
An optical disk stamper examination method for examining an optical disk stamper, comprising:
- affixing a transparent material composed of a single layer over the optical disk stamper, the single layer composed of a film-like transparent substance that covers the recording surface of the optical disk stamper;
- irradiating the optical disk stamper with a light of a laser beam through the transparent material;
- and
- detecting a reflected light.
Dependencies are inferred from the claim text.