| 摘要 |
PURPOSE:To unite accurately a magnetic head and a magneto-resistance effect (MR) type head for reproduction to one body by forming the 1st conductor and an MR element so that they intersect a magnetic core giving a closed magnetic circuit having a magnetic gap and by burying the 2nd conductor in the core at a part close to the MR element. CONSTITUTION:The 1st conductor 22 and an insulating layer 23 of Si3N4 or the like are successively formed on an insulating magnetic substrate 21, and an MR element 24 and an insulating layer 25 of SiO2 or the like are formed on the layer 23. The layer 25 is coated with a magnetic layer 26A, and the 2nd conductor 27 enveloped in insulating layers 32, 32 is formed so that it intersects the element 24. The layers 26A, 32 are coated with a magnetic layer 26B to form a magnetic layer 26, and a closed magnetic circuit consisting of the gap part (g), the layer 26 and the substrate 21 is constructed. The circuit is used as a magnetic head by supplying electric current to the conductor 22 without supplying electric current to the conductor 27. When the MR element 24 is used for reproduction, electric current is supplied to the conductor 22 so as to apply a bias magnetic field to the element 24, and by supplying electric current to the conductor 27, magnetic flux phi is generated around the conductor 27 in the layer 26 to generate a magnetic gap G. |
