Patent ID: 11953568
Assignee: DIGITAL GRID RES. INST., CHINA SOUTHERN PWR. GRID
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 8:
9. The method of claim 8, wherein the step of preparing the plurality of magnetic tunnel junctions on the substrate includes:
generating a TMR multilayer film structure on the substrate;
etching the TMR multilayer film structure to obtain a plurality of magnetic tunnel junction units arranged in rows, each row of the magnetic tunnel junction unit forming the magnetic tunnel junction; and
annealing the plurality of magnetic tunnel junction units to obtain the first magnetic tunnel junction and the second magnetic tunnel junction;
wherein a magnetic sensing direction of the first magnetic tunnel junction is a positive direction of the Z-axis, and a magnetic sensing direction of the second magnetic tunnel junction is a negative direction of the Z-axis; or
the magnetic sensing direction of the first magnetic tunnel junction is the negative direction of the Z-axis, and the magnetic sensing direction of the second magnetic tunnel junction is the positive direction of the Z-axis.