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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 5938941 B1

PDFFull Text
Date of Patent:
Aug. 17, 1999

Filed:

Jul. 16, 1998

Magnetoresistance effect composite head and method of forming the same

Applicant:
Inventors:

Nobuyuki Ishiwata, Tokyo, JP;

Tsutomu Ishi, Tokyo, JP;

Kiyokazu Nagahara, Tokyo, JP;

Kazumasa Kumagai, Tokyo, JP;

Assignee:

NEC Corporation, Tokyo, JP;

Attorney:

Young & Thompson

Primary Examiner:

Richard Bueker

Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
216 22 ; 216 67 ; 216 79 ;
Abstract

An inductive head structure provided in a magnetoresistance effect composite head includes an inductive head and a magnetoresistance effect head, the inductive head structure including a magnetic gap layer sandwiched by first and second magnetic layers acting as magnetic poles, the first magnetic layer being positioned close to the magnetoresistance effect head, the magnetic gap layer being made of a non-magnetic and electrically insulative material, wherein the non-magnetic and electrically insulative material has a higher etching rate to reactive ion etching than at least a magnetic material of the second magnetic layer.

Find Patent Forward Citations

Ishiwata, Nobuyuki. (1999). Magnetoresistance effect composite head and method of forming the same (U.S. Patent No. 5938941). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5938941

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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