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:
Mar. 21, 2006
Filed:
May. 13, 2004
Koichi Nishioka, Hiratsuka, JP;
Koichi Nishioka, Hiratsuka, JP;
Hitachi Global Storage Technologies Japan, Ltd., Tokyo, JP;
Abstract
As to a magnetic tunnel junction magneto-resistive head, which comprises an antiferromagnetic layer, a pinned ferromagnetic layer adjacent to said antiferromagnetic layer and magnetically pinned by a magnetization of said antiferromagnetic layer, a free ferromagnetic layer which is magnetically free from the magnetization of said antiferromagnetic layer, insulating layers sandwiched by these ferromagnetic layers, a stacked layers of ferromagnetic layers to control the magnetic domain of said free ferromagnetic layer and a pair of electrodes to apply a current to these layers and films, said stacked layers of ferromagnetic layers are formed between said free ferromagnetic layer and one of said electrodes. According to this composition, it is possible to present a magnetic tunnel junction magneto-resistive sensor with preferable domain controlling force against the free ferromagnetic layer.