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:
Apr. 08, 2003
Filed:
Jun. 29, 2001
Applicant:
Inventors:
Hirokazu Goto, Tokyo, JP;
Koji Ohtsuka, Kawagoe, JP;
Takasi Kato, Asaka, JP;
Hiromichi Kumakura, Ooimachi, JP;
Assignee:
Sanken Electric Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 1/520 ; G01R 3/306 ; G01R 1/900 ; H01L 4/306 ;
U.S. Cl.
CPC ...
G01R 1/520 ; G01R 3/306 ; G01R 1/900 ; H01L 4/306 ;
Abstract
A Hall-effect semiconductor device is formed on a metal-made baseplate, as of nickel-plated copper, via a magnetic layer of Permalloy or the like. Higher in magnetic permeability than the baseplate, the magnetic layer is designed to reduce the magnetic resistance of the flux path. A plastic encapsulation thoroughly encloses the semiconductor device, magnetic layer, and baseplate.