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公开(公告)号：JPS62104105A
公开(公告)日：1987-05-14
申请号：JP24456485
申请日：1985-10-31
Applicant: SONY CORP
Inventor： ISHIKAWA OSAMU , HAYASHI KAZUHIKO , HAYAKAWA MASATOSHI , OCHIAI YOSHITAKA , MATSUDA HIDEKI , IWASAKI HIROSHI , ASO KOICHI
Abstract: PURPOSE:To provide a soft magnetic thin film having high saturation magnetic flux density Bs, small coersive force Hc, high permeability mu, and especially sperior abrasion property by specifying the composition of the soft magnetic thin film formed of an Fe(-Co)-Ga-Si alloy added with Cr. CONSTITUTION:This soft magnetic thin film is of the composition represented by a formula, FeaCobGacSidCre (wherein a, b, c, d and e show atomic % of the respective composition ratio) and their composition ranges are the values expressed by inequalities, 68
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公开(公告)号：JPS6292305A
公开(公告)日：1987-04-27
申请号：JP23126785
申请日：1985-10-18
Applicant: SONY CORP
Inventor： HAYASHI KAZUHIKO , ISHIKAWA OSAMU , HAYAKAWA MASATOSHI , OCHIAI YOSHITAKA , MATSUDA HIDEKI , IWASAKI HIROSHI , ASO KOICHI
Abstract: PURPOSE:To improve corrosion resistance and wear resistance to a large extent, and prevent deterioration in soft magnetic characteristic and decrease in saturation magnetic flux density, by adding Ru to Sendust alloy whose basic components are Fe, Al and Si, CONSTITUTION:The main components of the titled device are Fe, Al and Si whose constitution ranges are 3-10wt% for Al and 5-15wt% for Si, and moreover, Ru of 2-15wt% is contained. The addition of Ru is extremely effective to improve corrosion resistance and wear resistance. For example, the amount of wear is investigated by varing the Ru addition amount (x) to the soft magnetic thin film whose composition is Fe72-x Rux Si17 Al11 (where numerical values indicate wt%). This result shows remarkable effects in reducing the amount of wear as shown in the figure.
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公开(公告)号：JPS6278805A
公开(公告)日：1987-04-11
申请号：JP21873785
申请日：1985-10-01
Applicant: SONY CORP
Inventor： HAYASHI KAZUHIKO , HAYAKAWA MASATOSHI , OCHIAI YOSHITAKA , MATSUDA HIDEKI , ISHIKAWA OSAMU , IWASAKI HIROSHI , ASO KOICHI
Abstract: PURPOSE:To make the saturated magnetic flux density of the titled soft magnetic thin film higher than that of the Sendust alloy without changing soft magnetic characteristics and the like by a method wherein Fe, Co, Ga and Si are selected as the constituent elements of the soft magnetic thin film, and the compositional ratio of said elements is set within the prescribed range. CONSTITUTION:In order to increase the density of saturated magnetic flux, the composition of the titled soft magnetic thin film is set as FexCoyGaaSib (the compositional ratio of x, y, a and b is indicated by atomic %) taking into consideration of the fact that the point of intersection of the line of magnetostriction lambdas=0 with the line of crystal magnetic anisotropy K=0 is to be set closer to the side of Fe high density, and that the rate of reduction of magnetic moment in absolute zero and the addition of Co improves the density of saturated magnetic flux, the corrosion resistance and the abrasion resistance of the soft magnetic thin film. In this compositional ratio, when the adding quantity of Co is too much, the density of saturated magnetic flux and soft magnetic characteristics are deteriorated in inverse proportion to the corrosion resistance and the abrasion resistance. Therefore, the compositional ratio of the material used is set as follows: 65
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公开(公告)号：JPS6169103A
公开(公告)日：1986-04-09
申请号：JP19097384
申请日：1984-09-12
Applicant: Sony Corp
Inventor： HAYASHI KAZUHIKO , OCHIAI YOSHITAKA , HAYAKAWA MASATOSHI , MATSUDA HIDEKI , ISHIKAWA OSAMU , IWASAKI HIROSHI , ASO KOICHI
CPC classification number: H01F1/18 , Y10S428/928 , Y10T428/1129 , Y10T428/12465 , Y10T428/12597 , Y10T428/12632 , Y10T428/12861
Abstract: PURPOSE:To prevent the substantial reduction in permeability especially in the super high frequency zone of 10MHz or above by a method wherein a plurality of layers of metal magnetic material layers are laminated through an electric insulating layer, and between each metal magnetic material layer is electrically short-circuited locally. CONSTITUTION:Metal magnetic material layers 1a-1c are laminated through the intermediaries of electric insulating layers 2a and 2b and, at the same time, a conductive material layer 3 with which between metal magnetic material layers 1a and 1c is electrically short-circuited locally is formed in deposition on one side face of the laminated body. An eddy current runs along the closed curved line E as shown by arrows in the diagram. As the high frequency eddy current runs on the conductive material layer 3, the part (shaded part) which is turned to an almost reactive region judging from the view-point of permeability, is reduced remarkably. As a result, the lowering of permeability in an extra-high frequency zone can be prevented effectively.
Abstract translation: 目的：为了防止渗透性的显着降低，特别是在10MHz以上的超高频区域中，通过电绝缘层层叠多层金属磁性体层，并且在各金属磁性体层之间， 当地短路。 构成：金属磁性体层1a-1c通过电绝缘层2a和2b的中间层叠，同时在金属磁性体层1a和1c之间的局部电短路的导电材料层3是 在层叠体的一个侧面上沉积形成。 涡流沿着封闭的曲线E运行，如图中的箭头所示。 随着高频涡流在导电材料层3上的流动，从导磁率的视点判断为几乎反应的区域的部分（阴影部分）显着减少。 结果，可以有效地防止超高频区域的磁导率的降低。
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公开(公告)号：JPH0851021A
公开(公告)日：1996-02-20
申请号：JP19179995
申请日：1995-07-27
Applicant: SONY CORP
Inventor： ISHIKAWA OSAMU , HAYASHI KAZUHIKO , HAYAKAWA MASATOSHI , OCHIAI YOSHITAKA , MATSUDA HIDEKI , IWASAKI HIROSHI , ASO KOICHI
Abstract: PURPOSE:To obtain a soft magnetic thin film having low coercive force Hc, substantially zero magnetostriction, and low magnetic anisotropy in which the magnetic characteristics and abrasion resistance are enhanced without causing deterioration of magnetic permeability due to saturation magnetic flux density. CONSTITUTION:The thin film of a crystalline alloy containing Fe, Ga and Si added with Cr has a composition containing 1-23atm% of Ga, 6-31atm% of Si, 0.5-7atm% of Cr and the remainder of Fe.
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Patent Agency Ranking
公开(公告)号：JPH07216597A
公开(公告)日：1995-08-15
申请号：JP897394
申请日：1994-01-31
Applicant: SONY CORP
Inventor： ISHIKAWA OSAMU
Abstract: PURPOSE:To remarkably improve reliability of the quality of substrate and the yield thereof by plating the substrate which is a body to be plated by electrodeposition so that the thickness and quality of a plated film is uniformalized on the surface thereof. CONSTITUTION:A cathode part 3 is constituted of the substrate 3a which is a body to be plated and an auxiliary cathode plate 3b, and the auxiliary cathode 3b is constituted of an outer peripheral part 11 and a substrate part 12. At the inner peripheral end of the outer peripheral part 11, plural engage pieces 7 are formed at equal spaces throughout the entire inner peripheral end and a spaced part 13 is formed between the inside of the outer peripheral part 11 and the outside of the substrate 3a.
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公开(公告)号：JPH06251336A
公开(公告)日：1994-09-09
申请号：JP6117493
申请日：1993-02-25
Applicant: SONY CORP
Inventor： SUYAMA HIDEO , SEKIYA TETSUO , HAGA SHUICHI , ISHIKAWA OSAMU
IPC: G11B5/39
Abstract: PURPOSE:To restrain lowering of reproduced output by disposing an MR element, produced by laminating ferromagnetic thin films through nonmagnetic metal layers, perpendicularly to an ABS plane. CONSTITUTION:An MR element 4 having leading end and trailing end connected, respectively, with wiring conductors 2, 3 for feeding sense current is formed on a substrate 1 of nonmagnetic material, e.g. Al2O3-TiC, functioning as a slider and then the MR element 4 is sandwiched vertically by a pair of magnetic shields 5, 6. Sense current flows into the element 4, intersecting an ABS plane 7 perpendicularly, in the longitudinal direction thereof through the wiring conductors 2, 3. A bias conductor 8 for applying a bias magnetic field to the element 4 is interposed between the conductors 2 and 3 above the central part in the longitudinal direction of the element 4 while traversing the element 4 perpendicularly. Permeability is ensured sufficiently by ferromagnetic thin films 4b, 4c formed on the opposite sides of a nonmagnetic metal layer 4a of Cu and thereby lowering of reproduced output is restrained.
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公开(公告)号：JPH05334624A
公开(公告)日：1993-12-17
申请号：JP16394792
申请日：1992-05-29
Applicant: SONY CORP
Inventor： SATO HITOSHI , ISHIKAWA OSAMU
IPC: G11B5/31
Abstract: PURPOSE:To prevent the end faces of magnetic cores from functioning as a pseudo gap and to improve recording and reproducing characteristics. CONSTITUTION:A lower magnetic film 7 and an upper magnetic film 8 are laminated on a substrate, by which a magnetic circuit part is constituted. The lower magnetic film 7 and upper magnetic film 8 are disposed to face each other with a gap material 10 in-between near the surface (ABS face 2a) facing a magnetic recording medium. The end faces of the lower magnetic film 7 and upper magnetic film 8 facing the above-mentioned ABS face 2a are formed to such a shape that the ends of the surfaces opposite to the surfaces (gap forming surfaces 7a, 8a) in contact with the above-mentioned gap material 10 are nonparallel with the above-mentioned front gap g1. There is a method for etching the lower magnetic film 7 and upper magnetic film 8 to prescribed patterns from the ABS surface side after the formation of the lower magnetic film 7 and upper magnetic film 8 as the method for controlling the shape of the end faces in such a manner.
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公开(公告)号：JPH04251414A
公开(公告)日：1992-09-07
申请号：JP11784291
申请日：1991-04-23
Applicant: SONY CORP
Inventor： SAITO NORIO , NARISAWA KOSUKE , ISHIKAWA OSAMU , SATO HITOSHI , WATANABE TAKASHI
IPC: G11B5/31
Abstract: PURPOSE:To prevent the saturation of magnetic fluxes in a magnetic gap part and to greatly improve a recording density characteristic even if a gap length and track width are narrowed. CONSTITUTION:The shape in the front part of an upper magnetic body 3 in the thin-film magnetic head which is formed with a magnetic circuit part by a thin-film forming technique is made into the form having the magnetic gap part 3a parallel with the lower magnetic body 2, a 1st inclined part 3b continuous with the magnetic gap part 3a and a 2nd inclined part 3c continuous with this 1st inclined part 3b.
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公开(公告)号：JPH04176006A
公开(公告)日：1992-06-23
申请号：JP30720490
申请日：1990-11-15
Applicant: SONY CORP
Inventor： NARISAWA KOSUKE , NIKAIDO MEGUMI , ISHIKAWA OSAMU
IPC: G11B5/31
Abstract: PURPOSE:To achieve a higher patterning accuracy of a conductor coil and an upper magnetic body with easy flattening of a lower magnetic body by covering a magnetic core, i.e. lower magnetic body, formed on a substrate with an insulation film to grind the film flat until the magnetic core is exposed. CONSTITUTION:A first magnetic core 3 is formed on a substrate 1 as lower magnetic body and a protective film 4 is formed covering the first magnetic core 3. Then, the protective film 4 is ground flat until the first magnetic core 3 is exposed, a conductor coil 11 is formed on the first magnetic core through an insulation film 8 and a second magnetic core 13 is formed as upper magnetic body. This facilitates the fattening of the lower magnetic body without degrading a magnetic characteristic while achieving a higher patterning accuracy of the conductor coil and the upper magnetic body.
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