Magnetic head comprising magneto-resistance effect element and side shields

Patent metadata

Field	Value
Publication number	US-9767834-B1
Application number	US-201615074071-A
Country	US
Kind code	B1
Filing date	Mar 18, 2016
Priority date	Mar 18, 2016
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A magnetic head includes a magneto-resistance effect element in the form of a multilayer film, a pair of shields between which the magneto-resistance effect element is interposed in the lamination direction of the layers of the magneto-resistance effect element and each functioning as an electrode, a pair of side shields with one of said side shields on each side of the magneto-resistance effect element in the direction perpendicular to the lamination direction of the magneto-resistance effect element interposed between the pair of shields, the side shields magnetically coupled to either of the pair of shields, and an anisotropy-application layer disposed adjacent to the shield magnetically coupled to the pair of side shields. The pair of shields, the magneto-resistance effect element, and the pair of side shields are exposed on the air bearing surface facing a recording medium. The anisotropy-application layer is not exposed on the air bearing surface and is provided at a position away from the air bearing surface.

First claim

What is claimed is:

1. A magnetic head, comprising:
a magneto-resistance effect element in the form of a multilayer film;
a pair of shields between which the magneto-resistance effect element is interposed in the lamination direction of layers of the magneto-resistance effect element, each of which functions as an electrode;
a pair of side shields, with one of said side shields on each side of the magneto-resistance effect element in the direction perpendicular to the lamination direction of the magneto-resistance effect element interposed between the pair of shields, the side shields magnetically coupled to either of the pair of shields; and
an anisotropy-application layer disposed adjacent to the shield magnetically coupled to the pair of side shields, wherein:
the pair of shields, the magneto-resistance effect element, and the pair of side shields are exposed on an air bearing surface facing a recording medium, and the anisotropy-application layer is not exposed on the air bearing surface and is provided at a position away from the air bearing surface,
a recess part provided in the insulating layer surrounding the magneto-resistance effect element and the side shields at a position away from the air bearing surface,
a recess part provided in the shield situated above the insulating layer in the lamination direction at a position overlapping with the recess part in the insulating layer in a plan view, and
the anisotropy-application layer is located in the recess part in the shield.

2. The magnetic head according to claim 1 , wherein
the anisotropy-application layer is made of an antiferromagnetic material.

3. The magnetic head according to claim 1 , wherein
the top surface in the lamination direction of the portion excluding the recess part of the shield includes the recess part and the top surface in the lamination direction of the anisotropy-application layer are situated at the same level.

4. The magnetic head according to claim 1 , wherein
multiple readers including the pair of shields, the magneto-resistance effect element, the pair of side shields, and the anisotropy-application layer are stacked and separated by an interelement insulating layer.

5. A head gimbal assembly, comprising
a magnetic head slider including the magnetic head according to claim 1 and
a suspension elastically supporting the magnetic head slider, wherein
the suspension has a flexure to which the magnetic head slider is joined, a load beam of which one end is connected to the flexure, and a base plate connected to the other end of the load beam.

6. A magnetic recording device, comprising
a magnetic head slider including the magnetic head according to claim 1 ,
a magnetic recording medium facing the magnetic head slider,
a spindle motor rotating/driving the magnetic recording medium, and
a device supporting the magnetic head slider and positioning the same with respect to the magnetic recording medium.

Assignees

• Tdk Corp

Inventors

• Hiraki Tetsuya
• Ota Minoru
• Watanabe Hisayoshi
• Machita Takahiko
• Ukita Hideyuki

Classifications

• G11B5/3912 Primary

  Arrangements in which the active read-out elements are transducing in association with active magnetic shields, e.g. magnetically coupled shields (G11B5/3916 takes precedence) · CPC title

• G11B5/39

  using magneto-resistive devices {or effects} · CPC title

• G11B5/3932 Primary

  Magnetic biasing films · CPC title

• G11B5/3906

  Details related to the use of magnetic thin film layers or to their effects · CPC title