| 摘要 |
PURPOSE:To reproduce the short wavelength signal magnetization being a characteristic of the vertical magnetic recording efficiently and stably, by eliminating the ruggedness on the recording medium running surface, in an MR head for vertical magnetization signal reproduction without width loss, and thickness loss corresponding to gap loss. CONSTITUTION:A groove 2 having a depth being the sum of a desired groove depth (about 5mum) and an abrasion margin (about 5mum) is formed by polishing the surface of an insulating base 1 such as ferrite and applying electrolytic etching. Then, a nonmagnetic member 3 such as SiO is formed into a thickness over the depth of the groove 2. Further, the surface is polished and Ni-Fe alloy, e.g., is vapor-deposited by about 500Angstrom on the surface having the same mating plate of the ferrite base 1 with the SiO plane of the groove 2 and having a desired groove depth, electrodes 5, 6 are arranged at both ends in lengthwise direction of the MR element by photo etching, the MR element 4 is provided in parallel with the lengthwise direction of the notch groove 2, and an SiO protection film is formed into a thickness >=10mum by vapor-deposition. |
