Patent ID: 7295408
Filing Date: 2007-11-13
Classification: G11B

Abstract:
1. A magnetic sensing element comprising: a multilayer film comprising a lower multilayer film and an upper multilayer film, wherein the lower multilayer film comprises a lower free magnetic sublayer, a nonmagnetic conductive layer disposed below the lower free magnetic sublayer, and a pinned magnetic layer disposed below the lower free magnetic sublayer, wherein the upper multilayer film comprises an upper free magnetic sublayer, a nonmagnetic conductive layer disposed above the upper free magnetic sublayer, and a pinned magnetic layer disposed above the upper free magnetic sublayer, and wherein a value ΔR×A, which represents the variation in magnetoresistance (ΔR)×element area (A), for one of the lower multilayer film and the upper multilayer film is smaller than the value ΔR×A for the other one of the lower multilayer film and the upper multilayer film.