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1. 发明授权

US5920447A Magnetic disk unit having laminated magnetic heads 失效
标题翻译：具有层叠磁头的磁盘单元
公开(公告)号：US5920447A
公开(公告)日：1999-07-06
申请号：US818674
申请日：1997-03-14
申请人： Hiromi Sakata , Hiroaki Yoda , Tomomi Funayama , Kohichi Tateyama , Tadahiko Kobayashi , Shigeru Takekado , Yoichiro Tanaka
发明人： Hiromi Sakata , Hiroaki Yoda , Tomomi Funayama , Kohichi Tateyama , Tadahiko Kobayashi , Shigeru Takekado , Yoichiro Tanaka
IPC分类号： G11B5/012 , G11B5/02 , G11B5/39 , G11B5/48 , G11B5/55 , G11B23/00 , G11B5/29
CPC分类号： G11B5/3967 , G11B5/012 , G11B5/4826 , G11B5/488 , G11B5/4886 , G11B5/5526 , G11B23/0007 , G11B5/02
摘要： A magnetic multi-head unit includes: a specific magnetic head formed so that a pair of magnetic yokes face each other on the same plane via a magnetic gap inclined by a predetermined azimuth angle; and a magnetic head which is adjacent to the specific magnetic head and which is formed so that a pair of magnetic yokes face each other on a plane different from the plane of the specific magnetic head via a magnetic gap inclined by the azimuth angle. The specific magnetic head and the adjacent magnetic head are laminated so as to form a plurality of layers while being shifted from each other in directions in which tracks on a magnetic disk extend. A magnetic disk unit includes: a magnetic disk, on which a plurality of information recording tracks are formed so as to extend in peripheral directions and which is rotated; and a magnetic multi-head including a plurality of transducers as heads for simultaneously writing and/or reading magnetic information on the plurality of information recording tracks of the magnetic disk every predetermined group of the tracks. The plurality of transducers are positioned as one with respect to the predetermined group of the tracks.
摘要翻译：磁性多头单元包括：特定磁头，其形成为使得一对磁轭经由倾斜预定方位角的磁隙在同一平面上彼此面对; 以及磁头，其与特定磁头相邻，并且形成为使得一对磁轭在与特定磁头的平面不同的平面上经由倾斜方位角的磁隙形成。特定的磁头和相邻的磁头被层叠以形成多个层，同时在磁盘上的磁道延伸的方向上彼此偏移。磁盘单元包括：磁盘，多个信息记录轨道形成为沿圆周方向延伸并旋转的磁盘; 以及包括多个换能器作为磁头的磁性多磁头，用于在每个预定磁道组中的每个磁盘的多个信息记录磁道上同时写入和/或读取磁信息。多个换能器相对于预定的轨道组定位成一个。

2. 发明授权

US5894384A Magnetoresistance effect head in which a magnetoresistance effect element and a soft magnetic film form a single magnetic circuit 失效
标题翻译：其中磁阻效应元件和软磁膜形成单个磁路的磁阻效应头
公开(公告)号：US5894384A
公开(公告)日：1999-04-13
申请号：US816336
申请日：1997-03-13
申请人： Tomomi Funayama , Tadahiko Kobayashi , Hiromi Sakata , Kohichi Tateyama
发明人： Tomomi Funayama , Tadahiko Kobayashi , Hiromi Sakata , Kohichi Tateyama
IPC分类号： G11B5/00 , G11B5/127 , G11B5/31 , G11B5/39
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3903 , G11B5/3916 , G11B5/3919 , G11B5/3958 , G11B5/3967 , G11B2005/0008 , G11B2005/3996 , G11B5/3113 , G11B5/3183
摘要： The magnetic head comprises two magnetoresistance effect elements and a soft magnetic film connecting end portions of the magnetoresistance effect elements with each other. The two magnetoresistance effect elements and the soft magnetic film are arranged in series so as to form a single magnetic circuit, and a magnetic gap is provided in the side of a surface facing a magnetic medium. Magnetic flux from the magnetic medium is introduced into the magnetoresistance effect elements through the magnetic gap. An insulating material may be used to fill the magnetic gap.
摘要翻译：磁头包括两个磁阻效应元件和连接磁阻效应元件的端部彼此的软磁膜。两个磁阻效应元件和软磁膜被串联布置以形成单个磁路，并且在面向磁介质的表面的侧面设置磁隙。来自磁介质的磁通量通过磁隙引入到磁阻效应元件中。可以使用绝缘材料来填充磁隙。

3. 发明授权

US06304415B1 Magnetic head 失效
标题翻译：磁头
公开(公告)号：US06304415B1
公开(公告)日：2001-10-16
申请号：US09615783
申请日：2000-07-13
申请人： Kohichi Tateyama , Hiroaki Yoda , Tadahiko Kobayashi , Hiromi Sakata , Michiko Hara , Akio Hori , Takashi Koizumi , Tomohiko Nagata
发明人： Kohichi Tateyama , Hiroaki Yoda , Tadahiko Kobayashi , Hiromi Sakata , Michiko Hara , Akio Hori , Takashi Koizumi , Tomohiko Nagata
IPC分类号： G11B531
CPC分类号： G11B5/3109 , G11B5/3116 , G11B5/3146 , G11B5/3153 , G11B5/3163 , G11B5/3967
摘要： At least one magnetic pole out of a pair of magnetic poles is provided with a T-shaped magnetic pole having a magnetic pole chip at the position contacting with a magnetic gap and an auxiliary magnetic pole which is wider than thereof. The proximity of an air bearing surface of the T-shaped magnetic pole is composed of a laminated film containing a magnetic material layer with a high saturated magnetic flux density which composes the magnetic pole chip and a portion of the auxiliary magnetic pole and a magnetic material layer with a low saturated magnetic flux density which composes the remaining portion of the auxiliary magnetic pole. When the front portion of the magnetic pole with the track width of 1.8 &mgr;m or less is composed of a laminated film containing a magnetic material layer having a high saturated magnetic flux density and a magnetic material layer having a low saturated magnetic flux density, the thickness of the magnetic material layer having the high saturated magnetic flux density is 0.5 &mgr;m or more. According to the above described magnetic pole, the magnetic saturation near the tip portion of the magnetic pole is controlled, so that preferable magnetic field strength and magnetic field gradient can be attained when the track width is narrowed.
摘要翻译：在一对磁极中的至少一个磁极设置有在与磁隙接触的位置处具有磁极片的T形磁极和比其宽的辅助磁极。 T形磁极的空气轴承表面的接近度由包含构成磁极片和辅助磁极的一部分的磁性材料层和具有高饱和磁通密度的磁性材料层的叠层膜构成，具有构成辅助磁极的剩余部分的低饱和磁通密度的层。当磁道宽度为1.8μm或更小的磁极的前部由包含具有高饱和磁通密度的磁性材料层和具有低饱和磁通密度的磁性材料层的层叠膜构成时，厚度具有高饱和磁通密度的磁性材料层的厚度为0.5μm以上。根据上述磁极，控制磁极尖端部附近的磁饱和，从而当磁道宽度变窄时可以获得优选的磁场强度和磁场梯度。

4. 发明授权

US06198597B1 Thin-film magnetic head having improved magnetic pole structure 有权
标题翻译：具有改善的磁极结构的薄膜磁头
公开(公告)号：US06198597B1
公开(公告)日：2001-03-06
申请号：US09153858
申请日：1998-09-16
申请人： Kohichi Tateyama , Hiroaki Yoda , Atsuhito Sawabe , Naoyuki Inoue , Akio Hori , Tadahiko Kobayashi , Hiromi Sakata , Michiko Hara , Takasi Koizumi , Tomohiko Nagata , Takeo Sakakubo , Kei Sakoda
发明人： Kohichi Tateyama , Hiroaki Yoda , Atsuhito Sawabe , Naoyuki Inoue , Akio Hori , Tadahiko Kobayashi , Hiromi Sakata , Michiko Hara , Takasi Koizumi , Tomohiko Nagata , Takeo Sakakubo , Kei Sakoda
IPC分类号： G11B531
CPC分类号： G11B5/3113 , G11B5/3116 , G11B5/3163
摘要： A thin-film magnetic head comprises a magnetic gap disposed to be positioned on an air bearing surface of the magnetic head, a pair of magnetic poles disposed to hold the magnetic gap therebetween, and a coil positioned between the pair of the magnetic poles to intersect the magnetic poles, wherein at least one of the magnetic poles being composed of a T-shaped magnetic pole, the T-shaped magnetic pole comprising a front part of a magnetic pole contacting with the magnetic gap, an intermediate part of a magnetic pole lying on the front part, and a rear part of a magnetic pole lying on the intermediate part, wherein a width of the front part roughly defines a track width, the rear part has a wider width in a direction of track width than a width of the front part, and the intermediate part contacts with the rear part at an entire width of the rear part at the air bearing surface and has a narrower width at a contacting face with the front part than the width of the rear part.
摘要翻译：薄膜磁头包括设置在磁头的空气轴承表面上的磁隙，设置成保持磁隙的一对磁极和位于一对磁极之间的线圈，以相交磁极，其中至少一个磁极由T形磁极组成，T形磁极包括与磁隙接触的磁极的前部，位于磁极的中间部分在前部的前部和位于中间部的磁极的后部，前部的宽度大致限定轨道宽度，后部在轨道宽度方向上的宽度比宽度宽前部，并且中间部分在后部的空气轴承表面的整个宽度处与后部接触，并且在与前部的接触面处具有比后部的宽度更窄的宽度。

5. 发明授权

US6108167A Magnetic head 有权
标题翻译：磁头
公开(公告)号：US6108167A
公开(公告)日：2000-08-22
申请号：US150926
申请日：1998-09-10
申请人： Kohichi Tateyama , Hiroaki Yoda , Tadahiko Kobayashi , Hiromi Sakata , Michiko Hara , Akio Hori , Takashi Koizumi , Tomohiko Nagata
发明人： Kohichi Tateyama , Hiroaki Yoda , Tadahiko Kobayashi , Hiromi Sakata , Michiko Hara , Akio Hori , Takashi Koizumi , Tomohiko Nagata
IPC分类号： G11B5/31 , G11B5/39 , G11B5/187
CPC分类号： G11B5/3109 , G11B5/3146 , G11B5/3153 , G11B5/3116 , G11B5/3163 , G11B5/3967
摘要： At least one magnetic pole out of a pair of magnetic poles is provided with a T-shaped magnetic pole having a magnetic pole chip at the position contacting with a magnetic gap and an auxiliary magnetic pole which is wider than thereof. The proximity of an air bearing surface of the T-shaped magnetic pole is composed of a laminated film containing a magnetic material layer with a high saturated magnetic flux density which composes the magnetic pole chip and a portion of the auxiliary magnetic pole and a magnetic material layer with a low saturated magnetic flux density which composes the remaining portion of the auxiliary magnetic pole. When the front portion of the magnetic pole with the track width of 1.8 .mu.m or less is composed of a laminated film containing a magnetic material layer having a high saturated magnetic flux density and a magnetic material layer having a low saturated magnetic flux density, the thickness of the magnetic material layer having the high saturated magnetic flux density is 0.5 .mu.m or more. According to the above described magnetic pole, the magnetic saturation near the tip portion of the magnetic pole is controlled, so that preferable magnetic field strength and magnetic field gradient can be attained when the track width is narrowed.
摘要翻译：在一对磁极中的至少一个磁极设置有在与磁隙接触的位置处具有磁极片的T形磁极和比其宽的辅助磁极。 T形磁极的空气轴承表面的接近度由包含构成磁极片和辅助磁极的一部分的磁性材料层和具有高饱和磁通密度的磁性材料层的叠层膜构成，具有构成辅助磁极的剩余部分的低饱和磁通密度的层。当轨道宽度为1.8μm或更小的磁极的前部由包含具有高饱和磁通密度的磁性材料层和具有低饱和磁通密度的磁性材料层的层叠膜构成时，具有高饱和磁通密度的磁性材料层的厚度为0.5μm以上。根据上述磁极，控制磁极尖端部附近的磁饱和，从而当磁道宽度变窄时可以获得优选的磁场强度和磁场梯度。

6. 发明授权

US06333840B1 Magnetic recording apparatus 失效
标题翻译：磁记录装置
公开(公告)号：US06333840B1
公开(公告)日：2001-12-25
申请号：US09270681
申请日：1999-03-16
申请人： Hiroaki Yoda , Tadahiko Kobayashi , Kohichi Tateyama , Hiromi Sakata
发明人： Hiroaki Yoda , Tadahiko Kobayashi , Kohichi Tateyama , Hiromi Sakata
IPC分类号： G11B5127
CPC分类号： B82Y10/00 , G11B5/012 , G11B5/09 , G11B5/3116 , G11B5/313 , G11B5/3903 , G11B5/3967 , G11B20/10
摘要： There is provided a magnetic recording apparatus capable of carrying out signal reproduction with high accuracy by using a narrow gap head structure corresponding to high recording density. An asymmetric gap structure MR head includes a magnetoresistance element 26 having a magnetoresistance film 24 and a pair of electrodes 25 disposed at the upper side; a reproducing magnetic gap film 23 disposed only at the lower side of the magnetoresistance element 26; a magnetic shielding film 22 disposed so as to make a laminate with the magnetoresistance element 26 through the reproducing magnetic gap film 23; and an insulating film 27 disposed at the upper side of the magnetoresistance element 26. When a signal is read by use of such a reproducing head, the signal of the present bit is read by subtracting a value obtained by multiplying signals of a plurality of previous bits by predetermined coefficients from the present reproduction signal. As another reproduction signal processing system, a partial response system is adopted.
摘要翻译：提供了一种能够通过使用对应于高记录密度的窄间隙头结构以高精度执行信号再现的磁记录装置。非对称间隙结构MR头包括具有磁阻膜24和设置在上侧的一对电极25的磁阻元件26。设置在磁阻元件26的下侧的再现磁隙膜23; 设置成通过再现磁隙膜23与磁阻元件26层叠的磁屏蔽膜22; 以及设置在磁阻元件26的上侧的绝缘膜27.当通过使用这种再现头读取信号时，通过减去通过将多个先前的信号乘以信号而获得的值来读取当前位的信号比特由来自当前再现信号的预定系数。作为另一再现信号处理系统，采用部分响应系统。

7. 发明授权

US5336337A Magnetrostrictive materials and methods of making such materials 失效
标题翻译：磁致伸缩材料及其制造方法
公开(公告)号：US5336337A
公开(公告)日：1994-08-09
申请号：US830569
申请日：1992-02-04
申请人： Tomomi Funayama , Tadahiko Kobayashi , Isao Sakai , Masashi Sahashi
发明人： Tomomi Funayama , Tadahiko Kobayashi , Isao Sakai , Masashi Sahashi
IPC分类号： H01F1/03 , H01L41/20 , H01F1/04
CPC分类号： H01F1/0306 , H01L41/20
摘要： The magnetostriction alloys of the present invention are composed basically of Tb-Dy-iron which is partially substituted by at least one element selected from the group consisting of Y, La, Cs, Pr, Nd and Sm, and have been grown in the direction of face index or contain Mn and M element (at least one metallic element selected from the group consisting of C, Mg, Al, Si, Ca, Zr, Y, Ga and B. The magnetostrictive alloy may be formed by melting the constituent materials by high frequency induction dissolution. The molten materials are cast in a heated mold having a temperature gradient. The solidified material may be further treated by hot working.
摘要翻译：本发明的磁致伸缩合金基本上由部分被选自Y，La，Cs，Pr，Nd和Sm中的至少一种元素取代的Tb-Dy-铁组成，并且沿着的表面指数<110>或含有Mn和M元素（选自C，Mg，Al，Si，Ca，Zr，Y，Ga和B中的至少一种金属元素）。磁致伸缩合金可以通过熔化通过高频感应溶解构成材料，熔融材料在具有温度梯度的加热模具中铸造，固化材料可以通过热加工进一步处理。

8. 发明授权

US5527398A Magnetostrictive materials and methods of making such materials 失效
标题翻译：磁致伸缩材料及其制造方法
公开(公告)号：US5527398A
公开(公告)日：1996-06-18
申请号：US140308
申请日：1993-10-22
申请人： Tomomi Funayama , Tadahiko Kobayashi , Isao Sakai , Masashi Sahashi
发明人： Tomomi Funayama , Tadahiko Kobayashi , Isao Sakai , Masashi Sahashi
IPC分类号： H01F1/03 , H01L41/20 , H01F1/053
CPC分类号： H01F1/0306 , H01L41/20
摘要： The magnetostriction alloys of the present invention are composed basically of Tb--Dy-iron which is partially substituted by at least one element selected from the group consisting of Y, La, Ce, Pr, Nd and Sm, and have been grown in the direction of face index or contain Mn and M element (at least one metallic element selected from the group consisting of C, Mg, Al, Si, Ca, Zr, Y, Ga and B. The magnetostrictive alloy may be formed by melting the constituent materials by high frequency induction dissolution. The molten materials are cast in a heated mold having a temperature gradient. The solidified material may be further treated by hot working.
摘要翻译：本发明的磁致伸缩合金基本上由Tb-Dy-Fe组成，其部分地被选自Y，La，Ce，Pr，Nd和Sm中的至少一种元素取代，并且已经沿着的表面指数<110>或含有Mn和M元素（选自C，Mg，Al，Si，Ca，Zr，Y，Ga和B中的至少一种金属元素）。磁致伸缩合金可以通过熔化通过高频感应溶解构成材料，熔融材料在具有温度梯度的加热模具中铸造，固化材料可以通过热加工进一步处理。

9. 发明授权

US06256863B1 Yoke type magnetoresistance head and manufacturing method of the same 失效
标题翻译：轭型磁阻头及其制造方法
公开(公告)号：US06256863B1
公开(公告)日：2001-07-10
申请号：US08815179
申请日：1997-03-11
申请人： Kazuhiro Saito , Akiko Saito , Hitoshi Iwasaki , Akihiko Tsutai , Hiroaki Yoda , Tadahiko Kobayashi , Yuichi Ohsawa , Masahi Sahashi , Yuzo Kamiguchi
发明人： Kazuhiro Saito , Akiko Saito , Hitoshi Iwasaki , Akihiko Tsutai , Hiroaki Yoda , Tadahiko Kobayashi , Yuichi Ohsawa , Masahi Sahashi , Yuzo Kamiguchi
IPC分类号： G11B542
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3113 , G11B5/3163 , G11B5/3903 , G11B5/3916 , G11B2005/3996 , Y10T29/49034
摘要： A magnetic yoke having a magnetic gap provided in the side of the surface facing the medium is disposed on the surface of a substrate. An MR film is disposed on the surface of the magnetic yoke substantially parallel to the substrate with a predetermined separation from the surface S facing the medium. At least both end portions of the MR film are magnetically coupled to the magnetic yoke. A pair of leads for supplying sensing current to the MR film have magnetic lead portions formed from the same magnetic layers as the magnetic yoke. The magnetic lead portions curb deterioration of MR head properties and yield reduction during formation of the leads. Furthermore, a bias magnetic field is applied to the magnetic yoke and the MR film at least during operation of the head. This bias magnetic field is for instance provided by a magnetic field induced by the electric current. Alternatively, a magnetic field induced by the electric current is applied while heat-processing the magnetic yoke. Magnetic anisotropy is induced to the magnetic yoke in a direction differing according to the position. This magnetic anisotropy curbs Barkhausen noise caused by the magnetic yoke.
摘要翻译：在基板的表面上设置具有设置在面向介质的表面侧的磁隙的磁轭。以与面向介质的表面S预定间隔的方式将磁性薄膜基本上平行于基板平行设置在磁轭的表面上。 MR膜的至少两个端部磁耦合到磁轭。用于向MR膜提供感测电流的一对引线具有由与磁轭相同的磁性层形成的磁性引线部分。磁性引线部分在引线形成期间抑制MR磁头特性的劣化和屈服减少。此外，至少在头部的操作期间，向磁轭和MR膜施加偏置磁场。该偏置磁场例如由电流引起的磁场提供。或者，在对磁轭进行加热处理的同时施加由电流引起的磁场。磁性各向异性在根据位置不同的方向上被引到磁轭上。这种磁各向异性限制了由磁轭引起的Barkhausen噪声。

10. 发明授权

US06369992B1 Yoke-type head with magneto-resistance effect film recessed from medium facing surface and extending across magnetic gap 失效
标题翻译：具有磁阻效应膜的轭型磁头，从介质面向表面凹陷并延伸穿过磁隙
公开(公告)号：US06369992B1
公开(公告)日：2002-04-09
申请号：US08909687
申请日：1997-08-12
申请人： Hiroaki Yoda , Atsuhito Sawabe , Hitoshi Iwasaki , Yuichi Ohsawa , Masashi Sahashi , Tadahiko Kobayashi
发明人： Hiroaki Yoda , Atsuhito Sawabe , Hitoshi Iwasaki , Yuichi Ohsawa , Masashi Sahashi , Tadahiko Kobayashi
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3903 , G11B5/3977 , G11B2005/3996
摘要： A magneto-resistance effect head records and reproduces recorded magnetic material. The magneto-resistance effect head has a magneto-resistance effect film connected to a pair of leads. Additionally, a magnetic yoke, with a first and second magnetic yoke member, directs a signal magnetic field from a recording medium to the magneto-resistance effect film. The magneto-resistance effect head is constructed such that the first and second magnetic yoke members have surfaces that face the recording medium. The surfaces of the first and second magnetic yoke members have a magnetic gap between them. Additionally, the magneto-resistance effect film is recessed from the medium facing surfaces by a predetermined distance. Moreover, the first and second magnetic yoke members are aligned almost in parallel with the magnetic flux flow from the recording medium to the first magnetic yoke member, the magneto-resistance effect film, and the second magnetic yoke member.
摘要翻译：磁阻效应头记录和再现记录的磁性材料。磁阻效应头具有连接到一对引线的磁阻效应膜。此外，具有第一和第二磁轭构件的磁轭将来自记录介质的信号磁场引导到磁阻效应膜。磁阻效应头被构造成使得第一和第二磁轭构件具有面向记录介质的表面。第一和第二磁轭构件的表面之间具有磁隙。此外，磁阻效应膜从面向介质的表面凹陷预定距离。此外，第一和第二磁轭构件几乎与从记录介质到第一磁轭构件，磁阻效应膜和第二磁轭构件的磁通流平行排列。

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