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.:

US 8472140 B1

Expired

Date of Patent:

Jun. 25, 2013

Filed:

Feb. 24, 2012

Spin oscillator or magnetic recorder including multiple injection layers in the magnetic recording head

Applicants:

Kenichiro Yamada, Minato-ku, JP;

Hitoshi Iwasaki, Yokosuka, JP;

Masayuki Takagishi, Kunitachi, JP;

Tomomi Funayama, Fuchu, JP;

Masahiro Takashita, Yokohama, JP;

Katsuhiko Koui, Yokohama, JP;

Mariko Kitazaki, Yokohama, JP;

Soichi Oikawa, Hachioji, JP;

Inventors:

Kenichiro Yamada, Minato-ku, JP;

Hitoshi Iwasaki, Yokosuka, JP;

Masayuki Takagishi, Kunitachi, JP;

Tomomi Funayama, Fuchu, JP;

Masahiro Takashita, Yokohama, JP;

Katsuhiko Koui, Yokohama, JP;

Mariko Kitazaki, Yokohama, JP;

Soichi Oikawa, Hachioji, JP;

Assignee:

Kabushiki Kaisha Toshiba, Tokyo, JP;

Attorney:

Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Angel Castro

Int. Cl.

CPC ...

G11B 5/147 (2006.01);

U.S. Cl.

CPC ...

Abstract

A magnetic recorder includes: a magnetic recording medium; a reproducing head; a magnetic recording head including: a main magnetic pole; a first magnetic layer containing a TM alloy; a second magnetic layer containing a TM alloy or an RE-TM alloy; a third magnetic layer containing an RE-TM alloy; a first intermediate layer provided between the first magnetic layer and the second magnetic layer; and a second intermediate layer provided between the second magnetic layer and the third magnetic layer; and a signal processing portion which performs signal writing into the magnetic recording medium by using the magnetic recording head and reading from the magnetic recording medium by using the reproducing head.

Find Patent Forward Citations

Yamada, Kenichiro. (2013). Spin oscillator or magnetic recorder including multiple injection layers in the magnetic recording head (U.S. Patent No. 8472140). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8472140

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