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:
Aug. 31, 1976
Filed:
Apr. 07, 1975
William Joshua Evans, Berkeley Heights, NJ (US);
Wesley Norman Grant, Berkeley Heights, NJ (US);
Bernard Thomas Murphy, New Providence, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
An integrated injection logic circuit cell structure and its fabrication are simplified. A pattern of oxide isolation regions is used to define, at least partially, the introduction of two types of impurities in such a way as to reduce the number of masking steps. Certain of these oxide regions do not penetrate through the conventional epitaxial layer, leaving a lateral buried path to serve as the base of a lateral injection transistor. A pattern of polycrystalline silicon containing impurities is used both as a diffusion source and an interconnection.