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:
Feb. 26, 2008
Filed:
Sep. 30, 2004
Jeffrey Scott Lille, Sunnyvale, CA (US);
Jeffrey Scott Lille, Sunnyvale, CA (US);
Eitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
A three terminal magnetic sensor (TTM) has a base region, a collector region which is adjacent the base region, an emitter region, and a barrier region which separates the emitter region from the base region. A sensing plane is defined along sides of the base region, the collector region, and the emitter region. An insulator layer is offset from the sensing plane and adjacent the collector region and the base region. A metal layer is offset from the sensing plane and in-plane and in contact with magnetic materials of the base region. This metal layer advantageously reduces an electrical resistance of the base region, which reduces signal noise in the TTM. Preferably, the metal layer has an electrical resistivity of less than 10 μΩ-centimeter (e.g. copper, gold, or ruthenium). The TTM may comprise a spin valve transistor (SVT), a magnetic tunnel transistor (MTT), or a double junction structure.