US 5,347,485 A · Magnetic thin film memory

Abstract

A magnetic thin film memory wherein the memory is composed of magnetic thin films with a layer of a higher coercive force and a layer of a lower coercive force via a nonmagnetic layer laminated repetitively, or magnetic thin films having the easy magnetization axis which lies between the perpendicular and the horizontal directions of the magnetic thin film, and information is recorded on the layer of a lower coercive force, or information is recorded by changing the direction of the magnetization by means of a magnetic field applied by two recording lines which cross the magnetic thin film, thereby to obtain a sufficient amplitude of reproduction signal even when the size of the memory is reduced.

Claims19

Dependent claims

A magnetic thin film memory to record information by a magnetization direction of a magnetic thin film and to read out a recorded information from the magnetic thin film according to a resistance thereof changeable by magneto-resistance effect, said magnetic thin film comprising:

at least one first magnetic layer;
at least one second magnetic layer of a lower coercive force than the at least one first magnetic layer;
and
at least one nonmagnetic conductive layer;
such that the at least one first magnetic layer and the at least one second magnetic layer are laminated interposing one of the at least one nonmagnetic layer between one of the at least one first magnetic layer and one of the at least one second magnetic layer wherein one of the at least one first magnetic layer is followed by one of the at least one nonmagnetic layer followed by one of the at least one second magnetic layer in a repetitive manner.

2 more elements

Dependencies are inferred from the claim text.

Magnetic thin film memory

Life of this patent

Magnetic thin film memory

Life of this patent

Abstract

Claims19