Patent ID: 11942128
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 11:
12. A magnetic memory device, comprising:
a top electrode on a substrate;
a magnetic tunnel junction pattern between the substrate and the top electrode;
a bottom electrode between the substrate and the magnetic tunnel junction pattern; and
a protection layer on a lateral surface of the magnetic tunnel junction pattern,
wherein the magnetic tunnel junction pattern includes:
a tunnel barrier pattern;
a free magnetic pattern between the tunnel barrier pattern and the top electrode;
a capping pattern between the free magnetic pattern and the top electrode; and
a first sub-pattern between the free magnetic pattern and the capping pattern,

wherein the capping pattern includes:
a lower capping patter including a non-magnetic metal;
a first non-magnetic pattern between the lower capping pattern and the top electrode, the first non-magnetic pattern including a first metal; and
a second non-magnetic pattern between the first non-magnetic pattern and the top electrode, the second non-magnetic pattern including a second metal different from the first metal, and the protection layer including metal oxide that contains at least one selected from the first metal and the second metal,

wherein the first sub-pattern has an upper surface contacting the non-magnetic metal of the lower capping pattern and a lower surface contacting the free magnetic pattern.