Optical recording/reproducing medium, mother stamper for...

Details Optical recording/reproducing medium, mother stamper for... Optical recording/reproducing medium, mother stamper for...

2007-07-10

2007-07-10

Dinh, Tan (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

Reexamination Certificate

active

10362220

ABSTRACT:
An optical recording and reproducing medium has grooves2formed along recording tracks and can be recorded and/or reproduced with irradiation of light L having a predetermined wavelength λ. When n assumes a refractive index of a medium extending from a light entrance end face to the grooves2of the optical recording and reproducing medium, a phase depth x of this groove2satisfies the following inequality:in-line-formulae description="In-line Formulae" end="lead"?λ/16.14n≦x≦λ/4.99nin-line-formulae description="In-line Formulae" end="tail"?and a ratio w/p between a width w of the groove2and a track pitch p satisfies the following inequality:in-line-formulae description="In-line Formulae" end="lead"?0.391≦(w/p)≦0.594in-line-formulae description="In-line Formulae" end="tail"?

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U.S. Appl. No. 10/508,089, filed Sep. 16, 2004, Endoh.
U.S. Appl. No. 10/845,112, filed May 14, 2004, Endoh et al.

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