US Patent 7463458 Magnetoresistive-effect device with a multi-layer magnetoresistive-effect film

Patent 7463458 was granted and assigned to Panasonic on December, 2008 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Panasonic

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

74634580

Patent Inventor Names

Akifumi Aono0

Date of Patent

December 9, 2008

Patent Application Number

119284730

Date Filed

October 30, 2007

Patent Primary Examiner

‌

William J Klimowicz

Patent abstract

A magnetic disk apparatus having a highly sensitive reproducing head and a method for manufacturing the magnetic disk apparatus are disclosed. A spin-valve-type multilayer film composed of an antiferromagnetic layer, a ferromagnetic layer, a nonmagnetic layer and a free magnetic layer is used as a magnetoresistive-effect device for the reproducing head. An antiferromagnetic reaction layer is formed between the antiferromagnetic layer and the ferromagnetic layer. The antiferromagnetic reaction layer is formed of a metallic compound containing oxygen.

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