Patent ID: 11950431
Assignee: WINBOND ELECTRONICS CORP.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 12:
13. A method of forming a magnetic tunnel junction (MTJ) device, comprising:
forming a magnetic tunnel junction layer;
patterning the magnetic tunnel junction layer to form magnetic tunnel junction elements;
forming an insulator to conformally cover the magnetic tunnel junction elements; and
forming an interlayer comprising a magnetic shielding layer between the magnetic tunnel junction elements, wherein the magnetic shielding layer comprises a metallic diamagnetic material layer or a metallic paramagnetic material layer, and the steps of forming the interlayer comprising the magnetic shielding layer between the magnetic tunnel junction elements comprise:
forming the magnetic shielding layer to conformally cover the insulator;
forming an interlayer dielectric layer blanketly covering the magnetic shielding layer; and
planarizing the interlayer dielectric layer and the magnetic shielding layer to expose the magnetic tunnel junction elements, wherein the insulator is planarized while the interlayer dielectric layer and the magnetic shielding layer are planarized.