Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1983-03-29
1985-10-29
Envall, Jr., Roy N.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219411, 219343, 118724, H05B 100, F27D 1102
Patent
active
045502455
ABSTRACT:
A light-radiant heating furnace including a box-shaped container, having a transparent wall portion, adapted to receive an object to be treated, for example, a large-sized semiconductor wafer, a reflector arranged in the proximity of outer surfaces of the transparent wall portion of the container, a space formed between the reflector and the outer surface of the transparent wall portion of the container, tubular lamps provided in the space and an air duct equipped with a cooling fan and arranged in communication with the spacing only. The lamps and their adjacent reflector and container wall can be efficiently cooled by causing cooling air to pass through the air duct and space, thereby avoiding overheating of the lamps and thus prolonging the service lives of the lamps. The reflector may be provided with water conduits through which cooling water flows.
REFERENCES:
patent: 3188459 (1965-06-01), Bridwell
patent: 3240915 (1966-03-01), Carter
patent: 3242314 (1966-03-01), Eckles
patent: 3304406 (1967-02-01), King
patent: 3836751 (1974-09-01), Anderson
patent: 4101759 (1978-07-01), Anthony
patent: 4167915 (1979-09-01), Toole
Arai Tetsuji
Shimizu Hiroshi
Envall Jr. Roy N.
Ushio Denki Kabushiki Kaisha
Walberg Teresa J.
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