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, 2008
Filed:
Jan. 07, 2005
Takehiko Hasebe, Yokohama, JP;
Yasushi Goto, Tokyo, JP;
Kouichi Uesaka, Yokohama, JP;
Yoshiaki Yazawa, Tokyo, JP;
Makoto Torigoe, Yokohama, JP;
Takehiko Hasebe, Yokohama, JP;
Yasushi Goto, Tokyo, JP;
Kouichi Uesaka, Yokohama, JP;
Yoshiaki Yazawa, Tokyo, JP;
Makoto Torigoe, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention intends to prevent the communication distance from becoming shorter with a reduction in size of a coil antenna to the chip size and with a consequent decrease of an induced voltage. According to the present invention there is provided a semiconductor chip having a coil antenna and a circuit surface and adapted to transmit and receive signals by radio to and from an external device. The semiconductor chip has a configuration for increasing an electromagnetic coupling coefficient between the coil antenna and the external device. According to a concrete example thereof, a magnetic material is disposed, the coil antenna is formed by a stacked structure comprising plural conductor layers and insulating layers superimposed one on another, or the coil antenna is disposed outside an external form of a circuit of the semiconductor chip.