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. 19, 2016
Filed:
May. 15, 2013
Fuji Electric Co., Ltd., Kawasaki-shi, JP;
Johnny Kin-On Sin, Hong Kong, CN;
Lulu Peng, Hong Kong, CN;
Rongxiang Wu, Hong Kong, CN;
Hitoshi Sumida, Matsumoto, JP;
Yoshiaki Toyoda, Matsumoto, JP;
Masashi Akahane, Matsumoto, JP;
FUJI ELECTRIC CO., LTD., Kawasaki-shi, JP;
Abstract
In certain aspects of the invention, an isolator is configured by a reception circuit, a transmission circuit, and a transformer. In some aspects, the transmission circuit is disposed in an anterior surface of a semiconductor substrate. The transformer is disposed in a posterior surface of the semiconductor substrate and transmits in an electrically isolated state to the reception circuit, a signal input from the transmission circuit. The transformer is configured by a primary coil and a secondary coil. The primary coil can be configured by a metal film embedded in an oxide film inside a coil trench. The secondary coil can be disposed inside an insulating film covering the primary coil so as to oppose the primary coil and is insulated from the primary coil by the insulating film.