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:
Feb. 19, 2008
Filed:
Dec. 29, 2004
Koji Shimazawa, Tokyo, JP;
Yoshihiro Tsuchiya, Tokyo, JP;
Kenji Inage, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
Provided is a magnetoresistive device capable of stably maintaining sufficient output characteristics even under a higher temperature environment while responding to a demand for a higher recording density. The magnetoresistive device comprises an MR film including a fixing layer made of IrMn, an outer pinned layer of which the magnetization direction is fixed in a +Y direction by the fixing layer, and an inner pinned layer of which the magnetization direction is fixed in a −Y direction by the fixing layer, a pair of conductive lead layers and a constant current circuit which flows a sense current in a +X direction so as to generate a current magnetic field toward a −Y direction in the inner pinned layer, and in the magnetoresistive device, a conditional expression (1) is satisfied. Thereby, the magnetization directions of the outer pinned layer and the inner pinned layer can be stabilized, so even under a high temperature environment, the magnetoresistive device can obtain stable output characteristics, and can respond to a demand for a higher recording density.