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:
May. 23, 2000
Filed:
Jul. 16, 1997
Kazuhide Ohba, Yamagata, JP;
Kensuke Miyagawa, Kanagawa, JP;
Hajime Miura, Kanagawa, JP;
Hideki Ohmori, Kanagawa, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A method is provided to adjust a bias current flowing through a magneto-resistive effect type magnetic head. An examining current is supplied to the magneto-resistive effect type magnetic head, and a voltage applied to a pair of terminals of the magneto-resistive effect type magnetic head is measured. In addition, a resistance of the magneto-resistive effect type magnetic head is calculated according to the examining current and the voltage, and an allowable range of the bias current flowing through the magneto-resistive effect type magnetic head is determined according to a relationship between a life time of the magneto-resistive effect type magnetic head examined in advance and the resistance of the magneto-resistive effect type magnetic head. An optimum bias current is determined within the allowable range in condition that a slice level margin is maximized.