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:
Mar. 22, 1988
Filed:
Nov. 26, 1986
Robert W Bower, Los Gatos, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
A bipolar transistor susceptible to high level integration has its active regions formed in slots within a semiconductor substrate. In one embodiment, the emitter is formed within a slot and has a surrounding region doped to function as a base. A collector is formed in another slot which is located adjacent but spaced apart from the emitter slot. Carrier transport occurs principally horizontally between the emitter and base and then to the collector. Additional slots may be used to isolate the slot transistor in conjunction with a horizontally disposed pn junction and a buried collector. The collector may be formed in a slot which contains an oxidized outer sidewall that serves to isolate the individual transistor.