MAGNETO RESISTIVE EFFECT HEAD

Japanese Patent JP3827789

B2

PROBLEM TO BE SOLVED: To improve film characteristics such as soft magnetism and interlayer coupled magnetic field, etc., of a giant magnetoresistive effect film even on a magnetic shield layer consisting of a crystal soft magnetic film with large surface ruggedness, by making the central period of the surface ruggedness of the substrate surface of the giant magnetoresistive effect film having a sandwich film of a three layer structure within a specified range.
SOLUTION: The giant magnetoresistive effect film (GMR film) is formed on a lower side magnetic shield layer 13 through a lower side magnetic gap film 14. Then, the surface of the lower side magnetic gap film 14 becomes the substrate of the giant magneto resistive effect film 15, and even when the ruggedness of this surface is large, by properly controlling a film forming condition, etc., and making the central period L of the surface rugedness L>70nm, an effect of individual ruggedness for the giant magnetoresistive effect film 15 is reduced. The substrate surface of the giant magnetoresistive effect film 15 is preferred that the Rmax of the surface ruggedness is 5nm<Rmax≤50nm.

JPS5750483	THIN FILM RELUCTANCE EFFECTIVE ELEMENT
JP3898098	MAGNETIC DETECTING DEVICE AND MAGNETIC REPRODUCING DEVICE HAVING THE DETECTING DEVICE
JP3925680	THIN FILM MAGNETIC HEAD AND ITS PRODUCTION

Kazuhiro Saito
Hiromi Fukuya
Hitoshi Iwasaki
Yuzo Ueguchi
Masashi Sahashi
Hiroaki Kawashima
Taro Oike
Koichi Terunuma
Haruyuki Morita

JP34977496A

September 27, 2006

December 27, 1996

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Toshiba Corporation
tdk Corporation

G11B5/39; (IPC1-7): G11B5/39

JP8321644A

Saichi Suyama

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