Title:
MAGNETO-RESISTANCE TYPE HEAD
Document Type and Number:
Japanese Patent JPH01182911
Kind Code:
A
Abstract:
PURPOSE:To improve the bias magnetic field generating capability and to operate the MR element under a sufficient magnetic field bias by selecting a ratio of bias conductor film thickness/magneto-resistance effect element film thickness of a shunt bias type MR head to be 4 or over and 6 or below. CONSTITUTION:A ratio of bias conductor film thickness/magneto-resistance effect element film thickness of a shunt bias type MR head is selected to be 4 or over and 6 or below. For example, the total film thickness of a protection layer 24 and a coating layer 25 is 1,200Angstrom and both ends of the MR film 22 and both ends of the bias conductor film 23 are connected to the conductive lead with keeping continuity. A sense current flowing through the conductive lead is shunted to a current 28 flowing to the MR element 22 and a current 27 flowing to the bias conductor 23. Then the MR element 22 is operated under the bias magnetic field applied by the current 27 flowing to the bias conductor 23. Since the rate of current flowing to the bias conductor is increased, a larger bias magnetic field is generated and the MR element is operated at a deeper magnetic field bias point.
Inventors:
HASEGAWA YUJI
Application Number:
JP555888A
Publication Date:
July 20, 1989
Filing Date:
January 13, 1988
Export Citation:
Assignee:
KANSAI NIPPON ELECTRIC
International Classes:
G01R33/09; G01R33/06; G11B5/39; (IPC1-7): G01R33/06; G11B5/39