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:
Dec. 13, 2005
Filed:
Jan. 12, 2005
Fumiaki Nakao, Tokyo, JP;
Yasuo Yamashita, Tokyo, JP;
Teruo Kiyomiya, Tokyo, JP;
Tetsuya Suzuki, Tokyo, JP;
Masayuki Inagaki, Tokyo, JP;
Mikio Kitaoka, Tokyo, JP;
Fumiaki Nakao, Tokyo, JP;
Yasuo Yamashita, Tokyo, JP;
Teruo Kiyomiya, Tokyo, JP;
Tetsuya Suzuki, Tokyo, JP;
Masayuki Inagaki, Tokyo, JP;
Mikio Kitaoka, Tokyo, JP;
FDK Corporation, Tokyo, JP;
Abstract
A surface-mount microconverter is formed by mounting a microinductor chip and a semiconductor integrated circuit chip on a circuit board. Stud terminals are arranged on the circuit board and the microinductor chip is supported on the stud terminals, and the microinductor chip and the semiconductor integrated circuit chip are superposed on the circuit board. The microconverter has an improved ability and is small and thin. The microconverter includes an effective laminated magnetic-core inductor. The inductor comprises a helical coil formed by uniting alternately superposed insulating magnetic layers and conductive pattern layers, and an annular closed magnetic path formed by the insulating magnetic layers and defining a magnetic field created by the coil. The inductor can be miniaturized in a thin chip, and a wide range in which magnetic flux density varies linearly can be secured by balancing a closed magnetic path for a magnetic field created by the coil.