Method of making optical disk master and an optical disk

Details Method of making optical disk master and an optical disk Method of making optical disk master and an optical disk

1994-07-12

1996-12-03

Chin, Tommy P.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369109, G11B 700

Patent

active

055815316

ABSTRACT:
An optical disk master having a diffraction structure including guide grooves and small pre-pits of a width narrower than a diffraction limit determined by a wavelength of light used is produced by preparing a photoresist layer subjected to anti-dissolution surface treatment, narrowing the spot diameter of a zero-th diffracted beam irradiated on the photoresist layer by a super resolution optics device, and effecting high contrast development to leave behind, as it is, a portion of the photoresist layer exposed to adverse higher order diffracted beams caused by super resolution. An optical disk produced from the master has a diffraction structure including tracks and/or pre-pits formed along a spiral track or concentric tracks and having a width narrower than a diffraction limit determined by a wavelength of light used in the course of formation of the diffraction structure.

REFERENCES:
patent: 4179708 (1979-12-01), Sheng et al.
patent: 4346164 (1982-08-01), Tabarelli et al.
patent: 4509162 (1985-04-01), Rester
patent: 4996682 (1991-02-01), Yanagihara et al.
patent: 5036511 (1991-07-01), Goldberg et al.
patent: 5051340 (1991-09-01), Tyan et al.
patent: 5121378 (1992-06-01), Hirose et al.
patent: 5132843 (1992-07-01), Aoyama et al.
"Modulieren der Grosse . . . Aufzeichnungstrager", Neues Aus Der Technik, No. 3, 15 Aug. 1985, Wurzburg De, p. 3.
Hitachi Review (HyoRon) vol. 65, No. 10, 1983-10 pp. 23-28 JP-A-63-114127.
Japanese Literature "Wave Optics" by Hiroshi Kubota, published by Iwanami shoten, 1971 pp. 175-177.
"Philips Technical Review" vol. 40, No. 10, 1982 pp. 287-297.

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