Electric heating – Metal heating – By arc
Patent
1991-11-19
1993-06-01
Albritton, C. L.
Electric heating
Metal heating
By arc
21912121, 346110V, B23K 1500
Patent
active
052162192
ABSTRACT:
A disk manufacturing apparatus produces a master disk of optical disks with a high recording density in a short time. According to one aspect, the apparatus comprises a housing forming a vacuum space; a holder holding a master disk having a recording surface subjected to an electron beam resist application process in the housing; a plurality of cold-cathode emitter elements, arranged two-dimensionally within a plane of beam irradiation to the master disk, irradiating an electron beam toward the master disk of optical disks when driven; and a driver selectively driving the a plurality of cold-cathode emitter elements. According to another aspect, the apparatus comprises at least one cold-cathode emitter element irradiating an electron beam toward the master disk when driven; a magnetic field lens, disposed between the cold-cathode emitter element and the master disk, focusing the electron beam emanated from the cold-cathode emitter elements. According to a further aspect, the apparatus comprises a turntable rotating the master disk in the housing; a head having at least one cold-cathode emitter element, when driven, irradiating an electron beam toward the master disk; and a driver driving the cold-cathode emitter element in accordance with a supplied record information signal.
REFERENCES:
patent: 4406939 (1983-09-01), Golker
patent: 4647947 (1987-03-01), Takeoka et al.
patent: 4651171 (1987-03-01), Tarnowski
patent: 5096563 (1992-03-01), Yoshizawa et al.
patent: 5120927 (1992-06-01), Williams et al.
Toma Teruo
Yokozeki Shinichi
Albritton C. L.
Pioneer Electronic Corporation
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