Manufacturing method of magneto-resistive element
First Claim
1. A manufacturing method of a magneto-resistive element, comprising:
- a step of fabricating a tunnel barrier layer on a first ferromagnetic layer formed on a substrate; and
a step of forming a second ferromagnetic layer on the tunnel barrier layer,wherein the step of fabricating the tunnel barrier layer includes;
a step of depositing a first metal layer on the first ferromagnetic layer;
a step of oxidizing the first metal layer;
a step of depositing a second metal layer on the oxidized first metal layer; and
a step of performing heating treatment on the oxidized first metal layer and the second metal layer prior to the step of forming a second ferromagnetic layer, andwherein the first metal layer and the second metal layer comprise magnesium.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides a manufacturing method of a magneto-resistive element capable of obtaining a higher MR ratio, in a method of forming a metal oxide layer (e.g., MgO layer) by oxidation treatment of a metal layer (e.g., Mg layer). An embodiment of the present invention includes the steps of; providing a substrate having a first ferromagnetic layer; fabricating a tunnel barrier layer on the first ferromagnetic layer; and forming a second ferromagnetic layer on the tunnel barrier layer. The step of fabricating the tunnel barrier layer includes; the steps of; depositing a first metal layer on the first ferromagnetic layer; oxidizing the first metal layer; depositing a second metal layer on the oxidized first metal layer; and performing heating treatment on the oxidized first metal layer and the second metal layer at a temperature at which the second metal layer boils.
-
Citations
9 Claims
-
1. A manufacturing method of a magneto-resistive element, comprising:
-
a step of fabricating a tunnel barrier layer on a first ferromagnetic layer formed on a substrate; and a step of forming a second ferromagnetic layer on the tunnel barrier layer, wherein the step of fabricating the tunnel barrier layer includes; a step of depositing a first metal layer on the first ferromagnetic layer; a step of oxidizing the first metal layer; a step of depositing a second metal layer on the oxidized first metal layer; and a step of performing heating treatment on the oxidized first metal layer and the second metal layer prior to the step of forming a second ferromagnetic layer, and wherein the first metal layer and the second metal layer comprise magnesium. - View Dependent Claims (2, 3, 4, 6, 7, 8, 9)
-
-
5. A manufacturing method of a magneto-resistive element, comprising:
-
a step of fabricating a tunnel barrier layer on a first ferromagnetic layer formed on a substrate; and a step of forming a second ferromagnetic layer on the tunnel barrier layer, wherein the step of fabricating the tunnel barrier layer includes; a step of depositing a first metal layer on the first ferromagnetic layer; a step of oxidizing the first metal layer; a step of depositing a second metal layer on the oxidized first metal layer; and a step of performing heating treatment on the oxidized first metal layer and the second metal layer at a temperature at which the second metal layer boils prior to the step of forming a second ferromagnetic layer, and wherein the first metal layer and the second metal layer comprise magnesium.
-
Specification