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1. 发明授权

US4439794A Magnetic head 失效
标题翻译：磁头
公开(公告)号：US4439794A
公开(公告)日：1984-03-27
申请号：US264706
申请日：1981-05-18
申请人： Yoshihiro Shiroishi , Hideo Fujiwara , Takeshi Kimura , Noriyuki Kumasaka , Nobuo Kobayashi , Takeo Yamashita , Teizo Tamura , Hideo Zama , Mitsuhiro Kudo , Tsutomu Iimura
发明人： Yoshihiro Shiroishi , Hideo Fujiwara , Takeshi Kimura , Noriyuki Kumasaka , Nobuo Kobayashi , Takeo Yamashita , Teizo Tamura , Hideo Zama , Mitsuhiro Kudo , Tsutomu Iimura
IPC分类号： G11B5/127 , G11B5/133 , G11B5/187 , G11B5/193 , G11B5/23 , G11B5/251 , G11B5/14
CPC分类号： G11B5/133 , G11B5/193
摘要： A magnetic head which uses single crystal Mn-Zn ferrite containing up to 7% by weight of SnO.sub.2 occluded therein without being allowed to separate and which has such a construction that glass having a contraction rate lower than that of ferrite is filled in the narrowed portion near the gap, the plane forming the principal magnetic circuit of the core is allowed to coincide with the {110} plane of the ferrite and an angle .theta. between the direction inside the {110} plane of the ferrite and the gap-forming plane is from 5.degree. to 40.degree. or 85.degree. to 120.degree.. The magnetic head having such a construction has a reduced modulation noise and extremely excellent write-and-read characteristics.
摘要翻译：使用含有高达7重量％的SnO 2的单晶Mn-Zn铁氧体的磁头，其不被分离，并且具有这样的结构，即将收缩率低于铁素体的玻璃填充到变窄部分在间隙附近，形成芯的主磁路的平面允许与铁素体的{110}平面和铁氧体的{110}平面内的<100>方向之间的角度θ与间隙 - 成型面为5°〜40°或85°〜120°。具有这种结构的磁头具有降低的调制噪声和极好的写和读特性。

2. 发明授权

US4450494A Magnetic head 失效
标题翻译：磁头
公开(公告)号：US4450494A
公开(公告)日：1984-05-22
申请号：US304612
申请日：1981-09-22
申请人： Hideo Fujiwara , Mitsuhiro Kudo , Teizo Tamura , Nobuyuki Sugishita , Yoshihiro Shiroishi , Takeshi Kimura , Kiminari Shinagawa , Noriyuki Kumasaka
发明人： Hideo Fujiwara , Mitsuhiro Kudo , Teizo Tamura , Nobuyuki Sugishita , Yoshihiro Shiroishi , Takeshi Kimura , Kiminari Shinagawa , Noriyuki Kumasaka
IPC分类号： G11B5/127 , G11B5/133 , G11B5/187 , G11B5/193 , G11B5/23 , G11B5/245 , G11B5/12 , G11B5/22
CPC分类号： G11B5/127 , G11B5/133 , G11B5/193
摘要： A magnetic head having a magnetic core formed by facing a pair of magnetic substances through a working gap at a head section confronting a magnetic recording medium is disclosed in which at least one of the magnetic substances has magnetic anisotropy, and an angle .alpha. (in a C-shaped core half) and/or an angle .alpha.' (in an I-shaped core half) between a core surface confronting the magnetic recording medium and a direction having a maximum magnetic permeability in a main magnetic circuit plane of the magnetic substance having magnetic anisotropy is made larger than an orientation angle of the above direction for making minimum the magnetic reluctance of the main magnetic circuit of the magnetic core by .beta. (for .alpha.) and/or .beta.' (for .alpha.') to improve the recording/reproducing characteristic of the magnetic head, where .beta. is given by a formula ##EQU1## is equal to or less than 25.degree., D indicates a depth of the working gap, L* indicates an effective length of an oblique part for forming the working gap, and min [a, b] indicates the smaller of a and b.
摘要翻译：公开了一种磁头，其具有通过面对磁记录介质的磁头部分处的工作间隙面对一对磁性物质形成的磁芯，其中至少一个磁性物质具有磁各向异性，并且角度α（在 C形芯部一半）和/或与磁记录介质相对的芯面之间的角度α'（I形磁芯半部）和磁性物质的主磁路平面中具有最大导磁率的方向使磁各向异性大于上述方向的取向角，以使磁芯的主磁路的磁阻为β（对于α）和/或β'（对于α'）来改善记录/再现的磁阻磁头的特性，其中β由公式给出等于或小于25°，D表示工作间隙的深度，L *表示斜度的有效长度 t形成工作间隙，min [a，b]表示a和b中较小的一个。

3. 发明授权

US4571652A Magnetic recording and reproducing apparatus 失效
标题翻译：磁记录和再现设备
公开(公告)号：US4571652A
公开(公告)日：1986-02-18
申请号：US444224
申请日：1982-11-24
申请人： Hideo Fujiwara , Shigekazu Otomo , Kiminari Shinagawa , Noriyuki Kumasaka , Takeo Yamashita , Mitsuhiro Kudo , Teizo Tamura
发明人： Hideo Fujiwara , Shigekazu Otomo , Kiminari Shinagawa , Noriyuki Kumasaka , Takeo Yamashita , Mitsuhiro Kudo , Teizo Tamura
IPC分类号： G11B5/133 , G11B5/193 , G11B5/221
CPC分类号： G11B5/193 , G11B5/133
摘要： A magnetic recording and reproducing apparatus comprises a magnetic head having magnetic cores in which at least portions thereof in the vicinity of a gap are made of M.sub.n -Z.sub.n ferrite single crystal and planes of the magnetic cores forming a principal magnetic circuit are formed by {110} planes of the ferrite and directions contained in the {110} planes are inclined to a surface facing a magnetic recording medium, and means for relatively moving the magnetic recording medium in an opposite and parallel direction to a projection vector on said surface facing said recording medium, of a vector directed from a site far from the surface facing the magnetic recording medium to a site near said surface in the direction projected on the surface facing the magnetic recording medium. The present magnetic recording and reproducing apparatus exhibits both high wear resistance and excellent read/write characteristic.
摘要翻译：一种磁记录和再现装置，包括具有磁芯的磁头，其中至少部分在间隙附近由Mn-Zn铁氧体单晶构成，并且形成主磁路的磁芯的平面由{110 {110}面中包含的铁素体和<100>方向的平面相对于面向磁记录介质的表面倾斜，并且用于使磁记录介质沿与所述表面上的投影矢量相反并且平行的方向相对移动的装置面向所述记录介质的是从远离面向磁记录介质的表面的位置引导的向量朝向投影在面向磁记录介质的表面的<100>方向上的所述表面附近的位置。本磁记录和再现装置具有高耐磨性和优良的读/写特性。

4. 发明授权

US4316228A Magnetic head 失效
标题翻译：磁头
公开(公告)号：US4316228A
公开(公告)日：1982-02-16
申请号：US100027
申请日：1979-12-03
申请人： Hideo Fujiwara , Mitsuhiro Kudo , Teizou Tamura , Nobuyuki Sugishita , Yoshihiro Shiroishi , Takeshi Kimura , Kiminari Shinagawa , Noriyuki Kumasaka
发明人： Hideo Fujiwara , Mitsuhiro Kudo , Teizou Tamura , Nobuyuki Sugishita , Yoshihiro Shiroishi , Takeshi Kimura , Kiminari Shinagawa , Noriyuki Kumasaka
IPC分类号： C04B35/26 , G11B5/127 , G11B5/133 , G11B5/193 , G11B5/23 , G11B5/251 , G11B5/14
CPC分类号： C04B35/2658 , G11B5/133 , G11B5/193
摘要： In a magnetic head a single-crystal Mn--Zn ferrite is employed as a core material, and cut-away parts in the vicinities of a gap are filled with a glass the contraction rate of which is lower than that of the ferrite. A principal magnetic circuit-forming plane of the core is brought into agreement with the {1 1 0} plane of the ferrite, while an angle .theta. defined between the direction within the {1 1 0} plane of the ferrite and a gap forming plane is made 5.degree.-40.degree. or 80.degree.-120.degree.. The magnetic head thus constructed exhibits very favorable write and read characteristics.
摘要翻译：在磁头中使用单晶Mn-Zn铁氧体作为芯材，间隙附近的切割部分填充有玻璃，其收缩率低于铁素体。芯的主磁路形成平面与铁素体的{110}平面一致，而在铁素体的{110}面内的<110°>方向之间限定的角度θ 间隙形成平面为5°-40°或80°-120°。如此构造的磁头表现出非常好的写和读特性。

5. 发明授权

US4559572A Magnetic head and method of fabricating same 失效
标题翻译：磁头及其制造方法
公开(公告)号：US4559572A
公开(公告)日：1985-12-17
申请号：US575704
申请日：1984-01-31
申请人： Noriyuki Kumasaka , Hideo Fujiwara , Shigekazu Otomo , Takeo Yamashita , Shinji Takayama , Noritoshi Saito , Nobuo Kobayashi , Mitsuhiro Kudo
发明人： Noriyuki Kumasaka , Hideo Fujiwara , Shigekazu Otomo , Takeo Yamashita , Shinji Takayama , Noritoshi Saito , Nobuo Kobayashi , Mitsuhiro Kudo
IPC分类号： G11B5/127 , G11B5/147 , G11B5/23 , G11B5/31 , G11B5/12
CPC分类号： G11B5/147 , G11B5/3106
摘要： A magnetic head core and a method of fabricating same, wherein a magnetic circuit is constituted by a pair of magnetic films having a V-shaped cross section which face each other at each protrudent section through the gap material. The cross-sectional portion of the V-shaped film is exposed to the surface facing the magnetic recording medium. The protrusions of the magnetic film pair have tip planes parallel to each other and substantially perpendicular to the moving direction of the magnetic recording medium. The tip plane has a width defined by the line of intersection between the plane and the surface facing the magnetic recording medium in correspondence to the recording track width. At least one of the magnetic films has a window for winding an excitation coil. The magnetic film is formed on the non-magnetic protection member having a V-shaped protrusion. The magnetic head has superior recording and reproducing characteristics in a wide frequency band with less rubbing noise, high wear-resistivity and high productivity, and operates without the pseudo gap effect. The magnetic head core is fabricated through the steps of forming a coil winding groove in the gap forming plane of a non-magnetic core block, forming a number of parallel grooves perpendicularly to the winding groove so that a number of V-shaped protrusions are produced, forming a magnetic film on the surface of the protrusions, forming a gap plane after the magnetic film has been coated with non-magnetic material, and splitting the block and then combining the two core blocks to complete a magnetic head core.
摘要翻译：一种磁头芯及其制造方法，其中磁路由通过间隙材料的每个突出部分彼此面对的具有V形横截面的一对磁膜构成。 V形膜的横截面部分暴露于面向磁记录介质的表面。磁性膜对的突起具有彼此平行的并且基本上垂直于磁记录介质的移动方向的尖端平面。尖端平面具有与记录轨道宽度相对应的平面与面向磁记录介质的表面之间的交点线限定的宽度。至少一个磁性膜具有用于缠绕励磁线圈的窗口。磁性膜形成在具有V形突起的非磁性保护构件上。磁头在宽频带具有优异的记录和再现特性，具有较少的摩擦噪声，高耐磨性和高生产率，并且没有伪间隙效应。通过在非磁性芯块的间隙形成平面中形成线圈绕槽的步骤制造磁头芯，与绕组槽垂直地形成多个平行的沟槽，从而产生多个V形突起在突起的表面上形成磁性膜，在磁性膜被非磁性材料涂覆之后形成间隙平面，分割该块，然后组合两个核心块，从而形成磁头芯。

6. 发明授权

US4656547A Composite type magnetic head for recording and reproducing high frequency signals 失效
标题翻译：用于记录和再现高频信号的复合型磁头
公开(公告)号：US4656547A
公开(公告)日：1987-04-07
申请号：US608407
申请日：1984-05-09
申请人： Noriyuki Kumasaka , Hideo Fujiwara , Shigekazu Otomo , Takeo Yamashita , Shinji Takayama , Noritoshi Saito , Mitsuhiro Kudo
发明人： Noriyuki Kumasaka , Hideo Fujiwara , Shigekazu Otomo , Takeo Yamashita , Shinji Takayama , Noritoshi Saito , Mitsuhiro Kudo
IPC分类号： G11B5/127 , G11B5/187 , G11B5/23 , G11B5/245 , G11B5/147 , G11B5/17
CPC分类号： G11B5/1874
摘要： There is provided a structure of a composite type magnetic head and its manufacturing method. The composite type magnetic head comprises: two high permeability ferrite blocks with projections having nearly edged sections formed thereon; magnetic films having a high saturation flux density deposited on the side faces of the projections, the magnetic films confronting each other via a functional gap near front ends of said projections; guard films deposited over the magnetic films comprising a non-magnetic material; and non-magnetic materials filled on the guard films up to side face of the coil. This magnetic head exhibits excellent recording and reproducing characteristics. The contour effect is negligibly small. The reaction between the magnetic film and the non-magnetic material is prevented by the guard film.
摘要翻译：提供复合型磁头的结构及其制造方法。复合型磁头包括：两个高磁导率铁氧体块，其上形成有几乎边缘的突起; 沉积在突起的侧面上的具有高饱和磁通密度的磁性膜通过在所述突起的前端附近的功能间隙相互面对; 保护膜沉积在包含非磁性材料的磁性膜上; 以及填充在保护膜上的非磁性材料直到线圈的侧面。该磁头具有出色的记录和再现特性。轮廓效应可忽略不计。保护膜可防止磁性膜与非磁性材料之间的反应。

7. 发明授权

US4972285A Amorphous magnetic alloy of Co-Nb-Zr system and magnetic head made from the same 失效
标题翻译： Co-Nb-Zr体系的非晶磁性合金和由其制成的磁头
公开(公告)号：US4972285A
公开(公告)日：1990-11-20
申请号：US217979
申请日：1988-07-12
申请人： Shigekazu Otomo , Noriyuki Kumasaka , Hideo Fujiwara , Shinji Takayama , Takeo Yamashita , Noritoshi Saito , Mitsuhiro Kudo
发明人： Shigekazu Otomo , Noriyuki Kumasaka , Hideo Fujiwara , Shinji Takayama , Takeo Yamashita , Noritoshi Saito , Mitsuhiro Kudo
IPC分类号： C22C45/04 , G11B5/127 , G11B5/245 , G11B5/31 , H01F1/153 , H01F10/12 , H01F10/13 , H01F10/16
CPC分类号： C22C45/04 , H01F1/15316
摘要： An amorphous magnetic alloy of Co-Nb-Zr system contains Co, Nb and Zr and has a composition which falls, in terms of atomic percent, within the region defined by straight lines connecting, in a ternary composition diagram assuming the total of contents of these three elements to be 100, a point (81% Co, 14% Nb, 5 Zr), a point (88% Co, 9% Nb, 3% Zr), a point (86.5% Co, 12.5% Nb, 1% Zr) and a point (81% Co, 18% Nb, 1% Zr). Disclosed also is a magnetic head having a core at least a part of which is constituted by this amorphous magnetic alloy. This magnetic head, when used in combination with a metal powder tape having a high coercive force, provides a remarkably increased recording-reproducing output.
摘要翻译： Co-Nb-Zr系的无定形磁性合金含有Co，Nb和Zr，其组成在三元组成图中以原子百分数在由直线连接的区域内下降，假定总量为这三个元素为100，点（81％Co，14％Nb，5 Zr），点（88％Co，9％Nb，3％Zr），点（86.5％Co，12.5％Nb，1 ％Zr）和点（81％Co，18％Nb，1％Zr）。还公开了一种磁头，其磁芯的至少一部分由该非晶磁性合金构成。当与具有高矫顽力的金属粉末带组合使用时，该磁头提供显着增加的记录再现输出。

8. 发明授权

US4610935A Magnetic film structure 失效
标题翻译：磁膜结构
公开(公告)号：US4610935A
公开(公告)日：1986-09-09
申请号：US571099
申请日：1984-01-16
申请人： Noriyuki Kumasaka , Hideo Fujiwara , Noritoshi Saito , Shigekazu Otomo , Takeo Yamashita , Mitsuhiro Kudo
发明人： Noriyuki Kumasaka , Hideo Fujiwara , Noritoshi Saito , Shigekazu Otomo , Takeo Yamashita , Mitsuhiro Kudo
IPC分类号： G11B5/147 , G11B5/31 , H01F10/00 , H01F10/12 , H01F10/13 , H01F10/16 , B32B15/00 , B32B15/04 , G11B5/127 , G11B5/62
CPC分类号： G11B5/3113 , G11B5/147 , H01F10/00 , Y10S428/926 , Y10S428/928 , Y10T428/1129 , Y10T428/12611 , Y10T428/12632 , Y10T428/12931 , Y10T428/12937
摘要： A magnetic film structure comprises at least one magnetic film unit wherein a plurality of main magnetic films of 0.05 to 0.5 .mu.m thickness made of a magnetic alloy containing iron or cobalt as principal constituent and having a high saturation magnetic induction of 10,000 gauss or more and a magnetostriction of 10.sup.-6 or less are laminated through intermediate magnetic films made of a magnetic material such as a nickel and iron alloy or amorphous magnetic alloy different from that of the main magnetic film and being so thin that the influence of coercive force of the intermediate magnetic film does not come out. A plurality of the magnetic film units are also laminated through non-magnetic insulating films. The magnetic film structure has high saturation magnetic induction and low coercive force.
摘要翻译：一种磁性膜结构包括至少一个磁性膜单元，其中由厚度为0.5至0.5μm的多个主磁膜由含有铁或钴作为主要成分的磁性合金制成，并且具有10,000高斯或更高的高饱和磁感应，通过与诸如镍和铁合金的磁性材料或不同于主磁性膜的非晶磁性合金制成的中间磁膜层压10-6或更小的磁致伸缩，并且薄如此薄，以致使得矫顽力的影响中间磁膜不会出来。多个磁性膜单元也通过非磁性绝缘膜层叠。磁膜结构具有高饱和磁感应和低矫顽力。

9. 发明授权

US4774616A Magnetic head having an integrated recording and playback head and an erasure head 失效
标题翻译：具有集成的记录和回放头和擦除头的磁头
公开(公告)号：US4774616A
公开(公告)日：1988-09-27
申请号：US694386
申请日：1984-12-04
申请人： Noriyuki Kumasaka , Hideo Fujiwara , Shigekazu Otomo , Takeo Yamashita , Noritoshi Saito , Mitsuhiro Kudo
发明人： Noriyuki Kumasaka , Hideo Fujiwara , Shigekazu Otomo , Takeo Yamashita , Noritoshi Saito , Mitsuhiro Kudo
IPC分类号： G11B5/31 , G11B5/265 , G11B5/16 , G11B5/22
CPC分类号： G11B5/2651 , G11B5/2655
摘要： The present invention relates to a magnetic head, which can form guard bands on a magnetic recording medium and which is especially suitable for magnetic discs, and a fabrication process thereof. The magnetic core of the present invention includes a recording and reproduction head core (31) and an erasure head core (32) which is integrally joined in series to the head core (31) for forming guard bands. Magnetic circuits are constructed of metallic magnetic materials (34), (34'), (35) and (35') formed on non-magnetic members (33) and (33'). As a result, a recording medium having high coercive forces can be recorded while the track width is reduced and the fabrication is facilitated with a high accuracy.
摘要翻译： PCT No.PCT / JP84 / 00159 Sec。 371日期1984年12月4日第 102（e）日期1984年12月4日PCT提交1984年4月2日PCT公布。公开号WO84 / 03984 日期：1984年10月11日。磁头技术领域本发明涉及一种能够在磁记录介质上形成保护带并且特别适用于磁盘的磁头及其制造方法。本发明的磁芯包括记录和再现头芯（31）和擦除头芯（32），它与头芯（31）串联成一体，用于形成防护带。磁路由形成在非磁性构件（33）和（33'）上的金属磁性材料（34），（34'），（35）和（35'）构成。结果，可以记录具有高矫顽力的记录介质，同时减小轨道宽度并且以高精度促进制造。

10. 发明授权

US4411716A Amorphous alloys for magnetic head core and video magnetic head using same 失效
标题翻译：用于磁头磁芯和视频磁头的非晶合金使用相同的
公开(公告)号：US4411716A
公开(公告)日：1983-10-25
申请号：US282805
申请日：1981-07-13
申请人： Kazuo Shiiki , Shigekazu Otomo , Mitsuhiro Kudo , Takeshi Kimura , Noriyuki Kumasaka , Hideo Fujiwara
发明人： Kazuo Shiiki , Shigekazu Otomo , Mitsuhiro Kudo , Takeshi Kimura , Noriyuki Kumasaka , Hideo Fujiwara
IPC分类号： H01F1/153 , C22C45/00 , C22C45/02 , C22C45/04 , G11B5/127 , G11B5/147 , G11B5/21 , C22C33/00
CPC分类号： C22C45/008 , G11B5/127 , G11B5/21
摘要： Amorphous alloys for magnetic head cores of a composition which is expressed by a general formula (Co.sub.x Fe.sub.1-x).sub.a Cr.sub.b Si.sub.c B.sub.1-a-b-c wherein the value of x is in the range between 0.925 and 0.97, the value of a is in the range between 0.74 and 0.76, the value of b is in the range between 0.005 and 0.03 and the value of c is in the range between 0.06 and 0.18, and wherein a+b+c.ltoreq.0.94, and a magnetic head for video equipment wherein at least one foil of one of the aforesaid alloys having a width of below 30 .mu.m is used. The amorphous alloys of the aforesaid composition are high in permeability, high in saturation magnetic flux density and low in magnetostriction. A magnetic head for video equipment using such alloys has excellent characteristics in that it has high recording and reproducing characteristics and a high output/noise ratio and shows little magnetic after effect.
摘要翻译：用于由通式（CoxFe1-x）aCrbSicB1-abc表示的组合物的磁头芯的非晶合金，其中x的值在0.925和0.97之间，a的值在0.74和0.76之间的范围内，b的值在0.005和0.03之间并且c的值在0.06和0.18之间的范围内，并且其中a + b + c <0.94，以及用于视频设备的磁头，其中至少一个使用宽度为30μm以下的上述合金之一的箔。上述组成的非晶态合金的磁导率高，饱和磁通密度高，磁致伸缩性低。使用这种合金的视频设备的磁头具有优异的特性，因为它具有高的记录和再现特性以及高的输出/噪声比，并且显示出很小的磁效应。

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