Patent ID: 7826179

Claim:
A magneto-resistive effect device of a CPP (current perpendicular to plane) structure, comprising a magneto-resistive effect unit, and an upper shield layer and a lower shield layer located and formed with that magneto-resistive effect unit sandwiched between them, with a sense current applied in a stacking direction, characterized in that: said magneto-resistive effect unit comprises a nonmagnetic metal intermediate layer, and a first ferromagnetic layer and a second ferromagnetic layer stacked and formed with that nonmagnetic metal intermediate layer sandwiched between them, wherein: said first ferromagnetic layer and said second ferromagnetic layer are exchange coupled via the nonmagnetic metal intermediate layer such that where there is no bias magnetic field applied, their magnetizations are anti-parallel with each other, and at least one of said upper shield layer and said lower shield layer has an inclined magnetization structure with its magnetization inclining with respect to a track width direction, so that by magnetization of that inclined magnetization structure, a bias magnetic field can be applied to said first ferromagnetic layer and said second ferromagnetic layer, wherein said inclined magnetization structure has a degree of inclination of magnetization such that while said upper shield layer and said lower shield layer maintain their own shield function, substantial orthogonal intersection of magnetization of said first ferromagnetic layer and magnetization of said second ferromagnetic layer is achievable.