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:
Nov. 09, 2010
Filed:
Jun. 14, 2007
Stephen Thomas, Redondo Beach, CA (US);
Stephen Thomas, Redondo Beach, CA (US);
HRL Laboratories, LLC, Malibu, CA (US);
Abstract
The present invention provides a layout for a self-aligned semiconductor device, comprising an emitter mesa structure having an emitter electrode, and a base region that is comprised of a base electrode, with the base electrode deposited along crystal planes of the emitter mesa structure that undercut when the emitter mesa structure is etched, while avoiding depositing of the base electrode along crystal planes of the emitter mesa structure that do not undercut when the emitter mesa structure is etched. This allows the emitter electrode and the base electrode to self-align along the crystal planes that the emitter mesa structure undercuts when etched, and be isolated along the crystal planes that the emitter mesa structure does not undercut when etched. The present invention further provides dual interconnects mechanism and for connecting external circuitry to various semiconductor layers.