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公开(公告)号：US3821773A
公开(公告)日：1974-06-28
申请号：US22006472
申请日：1972-01-24
Applicant: BETA IND INC
Inventor： MIZE J
Abstract: CHARGE CARRIERS ARE EMITTED FROM THE SURFACE OF A HETEROJUNCTION REGION WHICH IS FORMED WITHIN THE FILM-LIKE BODY OF A SEMICONDUCTOR MATERIAL. THE EMITTING REGION IS DEFINED BY AN INTERFACE WHICH IS GENERALLY SEMICIRCULAR IN CROSS-SECTION OR HAS AT LEAST A SUBSTANTIAL PORTION NEITHER PARA LLEL NOR PERPENDICULAR TO THE SURFACE OF THE FILM-LIKE BODY. THE THICKNESS OF THE FILM-LIKE BODY IS SOMEWHAT GREATER THAN THE DEPTH OF THE EMITTING REGION SO THAT CONTINUOUS UNINTERRUPTED AND GENERALLY SEMI-CYLINDRICAL INNER AND OUTER DEPLETION REGIONS EXIST ADJACENT THE INTERFACE. WHEN A VOLTAGE IN APPLIED ACROSS THE FILM-LIKE BODY AND HENCE ACROSS THE EMITTING REGION, THE DEPLETION REGIONS DISTORT IN A PARTICULAR FASHION AND PRODUCE AN ELECTRIC FIELD WITHIN THE EMITTING REGION. ELECTRONS CROSSING THE INTERFACE ARE "HEATED BY THIS FIELD TO A DEGREE PREMITTING ELECTRON EMISSION FROM THE SURFACE OF THE EMITTING REGION. THE ELECTRON EMISSION MAY BE VARIED BY ALTERING THE VOLTAGE APPLIED ACROSS THE JUNCTION.
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