Patent ID: 9645204
Date: 2017-05-09
CPC Classifications: G01R

Claim:
1. A magnetic sensor for sensing an external magnetic field, comprising: a first electrode and a second electrode disposed over a substrate; a first magnetic tunneling junction and a second magnetic tunneling junction conductively disposed between the first electrode and the second electrode and connected in parallel between the first electrode and the second electrodes, the first magnetic tunneling junction and the second magnetic tunneling junction being arranged along a first easy axis of the magnetic sensor; the first magnetic tunneling junction including a first pinned layer having a first pinned magnetization, a first free layer having a first free magnetization, and a first tunneling layer between the first pinned layer and the first free layer; the second magnetic tunneling junction including a second pinned layer having a second pinned magnetization, a second free layer having a second free magnetization, and a second tunneling layer between the second pinned layer and the second free layer; the first free magnetization and the second free magnetization being arranged substantially in parallel to the first easy axis and in substantially opposite directions; and the first pinned magnetization and the second pinned magnetization each forming an angle of about 45 or 135 degrees with the first easy axis, wherein the substrate has a first inclined surface, a second inclined surface, and a base plane, the first inclined surface and the second inclined surface each forming a respective bevel angle with the base plane; the first magnetic tunneling junction and the second magnetic tunneling junction are disposed on the first inclined surface of the substrate between the first electrode and the second electrode; and the magnetic sensor further comprising: a third magnetic tunneling junction and a fourth magnetic tunneling junction disposed on the second inclined surface of the substrate between a third electrode and a fourth electrode, the third magnetic tunneling junction and the fourth magnetic tunneling junction being connected in parallel and arranged along a second easy axis that is substantially parallel to the first easy axis, wherein: a conductive wire passes through the first, second, third, and fourth magnetic tunneling junctions for carrying a set current to generate the first, second, third, and fourth free magnetizations therein.