Patent ID: 6588092
Filing Date: 2003-07-08
Classification: G11B,Y10T

Abstract:
A method for producing a magnetic head, the magnetic head including a pair of magnetic core halves, and a nonmagnetic layer provided between the pair of magnetic core halves for combining the pair of magnetic core halves,the method comprising: a step of forming a winding window in at least one of a pair of oxide magnetic plates which are generally flat; a step of forming at least one underlying layer on each of the pair of oxide magnetic plates; a step of forming a metal magnetic thin film on the underlying layer, the metal magnetic thin film being formed using a solid material containing an element which is a main component of the metal magnetic thin film in an atmosphere containing at least one of oxygen and nitrogen by a gas phase technique, wherein the metal magnetic thin film includes a magnetic film containing, as a major material, magnetic crystalline particles having an average volume Va and an average surface area Sa fulfilling the relationship of Sa>about 4.84 Va&frac23; and the metal magnetic thin film has a composition represented by (MaXbZc)100-dAd, where M includes at least one magnetic metal element selected from the group consisting of Fe, Co and Ni, X includes at least one element selected from the group consisting of Si, Al, Ga and Ge, Z includes at least one element selected from the group consisting of elements of group IVa, elements of group Va, Al, Ga and Cr, and A includes at least one element selected from the group consisting of O and N, and a, b, c and d fulfill the relationships of about 0.1&lE;b&lE;about 26, about 0.1&lE;c&lE;about 5, a+b+c=100, and about 1&lE;d&lE;about 10; wherein the metal magnetic thin film includes magnetic crystalline particles, the magnetic crystalline particles have at least one shape selected from the group consisting of a generally needle-like shape, a generally column-like shape, and a multiple-branch shape combining the generally needle-like shape and the generally column-like shape, and the magnetic crystalline particles have an average length dS of a shorter side of about 5 nma step of forming a groove in a body including the oxide magnetic plate, the underlying layer, and the metal magnetic thin film so that the groove has a width corresponding to a track; and a step of combining the body with another body including an oxide magnetic plate, an underlying layer, and a metal magnetic thin film, with the nonmagnetic layer interposed therebetween, wherein the pair of magnetic core halves each include an oxide magnetic base, at least one underlying layer provided on the oxide magnetic base, and a metal magnetic thin film provided between the underlying layer and the nonmagnetic layer, wherein at least one of the pair of magnetic core halves has a winding window therein, and wherein the metal magnetic thin film is provided in such a manner as to prevent the oxide magnetic base from cracking due to an internal stress generated in the metal magnetic thin film.