Invention Grant
- Patent Title: Method for producing permanent electret charges in dielectric materials
- Patent Title (中): 在电介质材料中生产永久电荷的方法
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Application No.: US3644605DApplication Date: 1969-02-11
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Publication No.: US3644605APublication Date: 1972-02-22
- Inventor: SESSLER GERHARD M , WEST JAMES E
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US79841169 1969-02-11
- Main IPC: H01G7/02
- IPC: H01G7/02 ; H04R7/00 ; H04R19/00
Abstract:
STABLE THIN FILM ELECTRETS ARE PRODUCED BY DIRECTING AN ELECTRON BEAM ON A DIELECTRIC MATERIAL IN A CONTROLLED FASHION. ELECTRON ABSORPTION IN THE FILM AND INDUCED SECONDARY EMISSION, BOTH FROM THE FILM AND FROM AN ADJACENT DIELECTRIC SURFACE, AID IN PRODUCING STABLE ELECTRETS WITH SUPERIOR CHARGE CHARACTERISTICS AND VERY LONG LIFETIMES.
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