The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 19, 1978
Filed:
Dec. 03, 1976
Applicant:
Inventors:
Frederick A D'Altroy, Center Valley, PA (US);
Adrian R Hartman, Westfield, NJ (US);
Richard M Jacobs, Allentown, PA (US);
Robert L Pritchett, Bath, PA (US);
Peter W Shackle, Bridgewater, NJ (US);
Assignee:
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 38 ; 357 44 ; 357 45 ; 357 51 ; 357 64 ; 357 91 ;
Abstract
A semiconductor junction-isolated PNPN crosspoint switch array has a plurality of crosspoint switches that are each formed of four regions of alternating conductivity type in a semiconductor substrate. Low enough leakage to allow the crosspoint switch array to be used in large telephone switching systems is achieved by proper selection of the thickness of the semiconductor regions and by appropriate gold doping thereof.