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公开(公告)号：US4651248A
公开(公告)日：1987-03-17
申请号：US500907
申请日：1983-06-03
CPC分类号： G11B5/3143 , G11B5/1278 , G11B5/31
摘要： A thin-film magnetic head which has a structure wherein a spiral conductor coil having a plurality of turns is disposed between first and second magnetic layers being substantially in parallel with each other, through upper and lower inorganic insulator layers, and in which a part of the outermost turn of the conductor coil is exposed on a face opposite a magnetic recording medium along with the upper and lower inorganic insulator layers, to form a magnetic gap. This head can be readily manufactured by a manufacturing method including the step of forming the outermost turn of the conductor coil on the side of the face opposite the magnetic recording medium so as to be wider than any other part of the conductor coil, and the step of thereafter machining the face opposite the magnetic recording medium so as to expose the outermost turn of the conductor coil on the face opposite the magnetic recording medium. The magnetic head of the present invention is suited to high-density recording, and is high in recording and reproducing efficiencies and also in reliability.
摘要翻译： 具有以下结构的薄膜磁头：其中具有多个匝的螺旋导体线圈通过上下无机绝缘体层彼此基本上彼此平行地设置在第一和第二磁性层之间，并且其中一部分 导体线圈的最外圈与上下无机绝缘体层一起在与磁记录介质相对的面上露出，形成磁隙。 该头可以容易地通过制造方法制造，该方法包括以下步骤：在与磁记录介质相对的面的一侧形成导体线圈的最外圈，以便比导体线圈的任何其它部分宽，并且步骤 之后加工与磁记录介质相对的面，以便暴露在与磁记录介质相对的表面上的导体线圈的最外圈。 本发明的磁头适用于高密度记录，记录和再现效率高，可靠性高。
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公开(公告)号：US4631612A
公开(公告)日：1986-12-23
申请号：US513615
申请日：1983-07-14
申请人： Kazuo Shiiki , Yoshihiro Shiroishi , Isamu Yuito , Kiminari Shinagawa , Yasutaro Uesaka , Hideo Fujiwara , Hitoshi Nakamura
发明人： Kazuo Shiiki , Yoshihiro Shiroishi , Isamu Yuito , Kiminari Shinagawa , Yasutaro Uesaka , Hideo Fujiwara , Hitoshi Nakamura
CPC分类号： G11B5/1278 , G11B5/00 , G11B5/127 , G11B5/62
摘要： A magnetic recording and reproducing system comprising (i) a magnetic head including a first magnetic pole whose saturation flux density is at least 7 kG and whose edge face is 0.15-0.5 .mu.m thick, and a second magnetic pole which lies on the same side as the first magnetic pole with respect to a recording medium and whose edge face is at least 10 times thicker than that of the first magnetic pole, and (ii) the perpendicular magnetic recording medium including a perpendicular magnetization layer which has a coercive force of 250-600 Oe. in a direction perpendicular to a plane thereof and which is 0.1-0.5 .mu.m thick.
摘要翻译： 一种磁记录和再现系统，包括（i）磁头，其包括饱和磁通密度至少为7kG并且其边缘面为0.15-0.5μm厚的第一磁极，以及位于同一侧的第二磁极 作为相对于记录介质的第一磁极并且其边缘面比第一磁极的边缘面厚至少10倍，以及（ii）垂直磁记录介质包括矫顽力为250的垂直磁化层 -600 Oe 在垂直于其平面的方向上，厚度为0.1-0.5μm。
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公开(公告)号：US4636897A
公开(公告)日：1987-01-13
申请号：US539386
申请日：1983-10-06
申请人： Hitoshi Nakamura , Kasuo Shiiki , Isamu Yuito , Yoshihiro Shiroishi , Hideo Fujiwara , Kiminari Shinagawa , Akemi Iijima
发明人： Hitoshi Nakamura , Kasuo Shiiki , Isamu Yuito , Yoshihiro Shiroishi , Hideo Fujiwara , Kiminari Shinagawa , Akemi Iijima
CPC分类号： G11B5/1278
摘要： A perpendicular magnetic recording and reproducing thin film head of a structure excellent in magnetic characteristics and easy of fabrication, wherein a lower magnetic layer disposed on a flat nonmagnetic substrate is used as a main magnetic pole, a first insulator layer is formed on the main magnetic pole, a conductor for a coil and a second insulator layer are disposed on the first insulator layer, and an upper magnetic layer which lies in contact with the lower magnetic layer through the first insulator layer at one end thereof and directly at the other end thereof and which overlies the second insulator layer in a part thereof other than both the ends is disposed and used as an auxiliary magnetic pole.
摘要翻译： 磁性特性优良，制造容易的结构的垂直磁记录再生薄膜头，其特征在于，使用设置在平面非磁性基板上的下部磁性层作为主磁极，在主磁体上形成第一绝缘体层 极，用于线圈的导体和第二绝缘体层设置在第一绝缘体层上，并且上磁性层通过第一绝缘体层在其一端直接与下磁性层接触，并且在另一端处 并且在除了两端的部分中的第二绝缘体层之外的位置被布置并用作辅助磁极。
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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
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。
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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
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。 -
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
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。
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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
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。
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公开(公告)号：US4621030A
公开(公告)日：1986-11-04
申请号：US513422
申请日：1983-07-13
申请人： Yasutaro Uesaka , Hideo Fujiwara , Sadao Hishiyama , Kazuo Shiiki
发明人： Yasutaro Uesaka , Hideo Fujiwara , Sadao Hishiyama , Kazuo Shiiki
CPC分类号： G11B5/66 , G11B2005/0029 , Y10S428/928 , Y10T428/12438 , Y10T428/12465 , Y10T428/12535 , Y10T428/12931 , Y10T428/12937 , Y10T428/12944 , Y10T428/12951
摘要： A perpendicular magnetic recording medium free from spike noise having a high permeability magnetic material film, an antiferromagnetic material film and a perpendicularly oriented magnetic material film formed on a substrate in this order. Another high permeability magnetic material film may be formed between the antiferromagnetic material film and the perpendicularly oriented magnetic material film. During the formation of the antiferromagnetic material film, a magnetic field is applied in a direction of a track width.
摘要翻译： 没有尖峰噪声的垂直磁记录介质具有高磁导率磁性材料膜，反铁磁性材料膜和垂直取向的磁性材料膜，其顺序形成在基板上。 可以在反铁磁材料膜和垂直取向的磁性材料膜之间形成另一高磁导率磁性材料膜。 在反铁磁性材料膜的形成过程中，沿轨道宽度的方向施加磁场。
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9.发明授权
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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公开(公告)号：US09816825B2
公开(公告)日：2017-11-14
申请号：US13519165
申请日：2010-12-27
申请人： Akio Sumizawa , Arata Hayashi , Hideo Fujiwara , Satoshi Kurihara
发明人： Akio Sumizawa , Arata Hayashi , Hideo Fujiwara , Satoshi Kurihara
CPC分类号： G01C21/3453 , G01C21/3658
摘要： Provided are navigation technologies capable of preferentially guiding a vehicle to a route of a driving lane that can be available if given conditions are met. A navigation device is provided with a storage unit adapted to store lane information including the presence or absence of a driving lane that can be available if given conditions are met (hereinafter referred to as a conditional lane), a conditional-lane determining unit adapted to determine whether a vehicle equipped with the navigation device meets the conditions for driving in the conditional lane, and a route searching unit adapted to search a recommended route to a destination, wherein said route searching unit uses lane information to preferentially search for a route which utilizes a road including the conditional lane, when the conditional-lane determining unit determines that the aforementioned conditions are met.
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