公开(公告)号：US4943879A

公开(公告)日：1990-07-24

申请号：US085719

申请日：1987-08-17

申请人： Hisashi Takano ,  Yoshihiro Hamakawa ,  Kazuo Shiiki ,  Shigekazu Otomo ,  Noriyuki Kumasaka

发明人： Hisashi Takano ,  Yoshihiro Hamakawa ,  Kazuo Shiiki ,  Shigekazu Otomo ,  Noriyuki Kumasaka

IPC分类号： G11B5/31

CPC分类号： G11B5/3163 ,  G11B5/3133

摘要： A thin film magnetic head having a first magnetic layer of a saturation magnetic flux density greater than that of a Ni-Fe alloy and a second magnetic layer of a saturation magnetic flux density grater than that of a Ni-Fe alloy supported by a base layer, the magnetic layers for forming a magnetic core of the head with a non-magnetic material gap layer interposed therebetween, and an electrically insulating layer provided between the magnetic layers so that turns of coil wound about the magnetic core are partly formed in electrically insulated relation within the insulating layer, in which a metal film is provided between the first magnetic layer and the electrically insulating layer so that the electrically insulating layer does not contact with the first magnetic layer and/or another metal film is formed on the second magnetic layer so that the other metal layer is sandwiched between the non-magnetic layer and the second magnetic layer.

摘要翻译： 一种薄膜磁头，其具有大于Ni-Fe合金的饱和磁通密度的第一磁性层和比由基底层支撑的Ni-Fe合金的饱和磁通密度分布的第二磁性层 用于形成具有介于其间的非磁性材料间隙层的头部的磁芯的磁性层和设置在磁性层之间的电绝缘层，使得缠绕在磁芯上的线圈的匝部分地形成为电绝缘关系 在绝缘层内，在第一磁性层和电绝缘层之间设有金属膜，使得电绝缘层不与第一磁性层接触和/或在第二磁性层上形成另一金属膜，因此 另一个金属层夹在非磁性层和第二磁性层之间。

公开(公告)号：US4814921A

公开(公告)日：1989-03-21

申请号：US150504

申请日：1988-02-01

申请人： Yoshihiro Hamakawa ,  Kazuo Shiiki ,  Yoshihiro Shiroishi ,  Isamu Yuitoo ,  Hitoshi Numasaka ,  Noriyuki Kumasaka ,  Shigekazu Otomo ,  Eijin Moriwaki

发明人： Yoshihiro Hamakawa ,  Kazuo Shiiki ,  Yoshihiro Shiroishi ,  Isamu Yuitoo ,  Hitoshi Numasaka ,  Noriyuki Kumasaka ,  Shigekazu Otomo ,  Eijin Moriwaki

IPC分类号： G11B5/31 ,  G11B5/127

CPC分类号： G11B5/31

摘要： Multilayered magnetic films of the invention comprising at least two unit magnetic films each of which has a thickness of from 0.05 to 0.9 .mu.m and includes a plurality of ferromagnetic layers each having a thickness of from 0.01 to 0.2 .mu.m and a 1 nm to 10 nm thick first intermediate layer consisting of a ferromagnetic, nonmagnetic or antiferromagnetic material and provided between adjacent ferromagnetic layers, and a second intermediate layer having a thickness of from 10 to 40 nm, consisting of a nonmagnetic or antiferromagnetic material and provided between the at least two unit magnetic films. The multilayered magnetic film is suitable as a pole of a thin-film magnetic head. An underlayer may be further provided between the magnetic film and a substrate whereby a multilayered magnetic film having good characteristics can be obtained.

摘要翻译： 本发明的多层磁性膜包括至少两个单元磁性膜，每个单元磁性膜的厚度为0.05至0.9μm，并且包括多个铁磁层，每个铁磁层的厚度为0.01至0.2μm，1nm至10nm nm厚的第一中间层，由铁磁性，非磁性或反铁磁性材料构成，并且设置在相邻的铁磁层之间，以及厚度为10至40nm的第二中间层，由非磁性或反铁磁材料组成，并且设置在所述至少两个 单位磁膜。 多层磁性膜适合作为薄膜磁头的磁极。 可以在磁性膜和基板之间进一步设置底层，由此可以获得具有良好特性的多层磁性膜。

公开(公告)号：US4766039A

公开(公告)日：1988-08-23

申请号：US875222

申请日：1986-06-17

申请人： Shigekazu Otomo ,  Noriyuki Kumasaka ,  Noritoshi Saito ,  Takeo Yamashita ,  Kazuo Shiiki ,  Yoshihiro Hamakawa

发明人： Shigekazu Otomo ,  Noriyuki Kumasaka ,  Noritoshi Saito ,  Takeo Yamashita ,  Kazuo Shiiki ,  Yoshihiro Hamakawa

IPC分类号： G11B5/11 ,  G11B5/127 ,  G11B5/147 ,  G11B5/31 ,  G11B5/39 ,  H01F10/12 ,  H01F10/13 ,  H01F10/16

CPC分类号： G11B5/11 ,  G11B5/1278 ,  G11B5/147 ,  G11B5/31 ,  G11B5/39 ,  Y10S428/90

摘要： A magnetic head comprising a magnetic film in at least a part of a magnetic circuit, at least a part of the magnetic film being formed in contact with, or being exposed to, an oxide or oxygen at least in a heating step at 150.degree. C. or higher in a process for preparing the magnetic head is disclosed. An amorphous alloy film for the magnetic film has the following composition formula to give distinguished head characteristics without any oxidation:Co.sub.a T.sub.b Zr.sub.c N.sub.dwhere T is at last one of Nb, Ta, W, Mo, V and Cr; N is at least one of Au, Pt and Ag; d.gtoreq.1, b>0, b.sub.1 +b.sub.2 +2c.gtoreq.10, a+d.gtoreq.80, -1.ltoreq.(3c-b.sub.1 -3b.sub.2 -5b.sub.3 -3b.sub.4 -4d)/(c+b.sub.1 +b.sub.2 +b.sub.3 +b.sub.4 +d).ltoreq.1, and a+b+c+d=100, where b.sub.1 is a Nb concentration, b.sub.2 is a Ta concentration, b.sub.3 is a W concentration, b.sub.4 is sum total of Mo, Cr and V concentrations and b=b.sub.1 +b.sub.2 +b.sub.3 +b.sub.4.

摘要翻译： 磁头包括至少一部分磁路中的磁性膜，至少一部分磁性薄膜至少在150℃的加热步骤中与氧化物或氧气接触或暴露于氧化物或氧气中 公开了一种用于制备磁头的方法。 用于磁性膜的非晶态合金膜具有以下组成式，可以得到无特殊的头部特性：没有任何氧化：CoaTbZrcNd，其中T是Nb，Ta，W，Mo，V和Cr中的最后一个; N是Au，Pt和Ag中的至少一种; d> / = 1，b> 0，b1 + b2 + 2c> / = 10，a + d> / = 80，-1（3c-b1-3b2-5b3-3b4-4d）/（c + b1 + b2 + b3 + b4 + d）

公开(公告)号：US4762755A

公开(公告)日：1988-08-09

申请号：US665911

申请日：1984-10-29

申请人： Kazuo Shiiki ,  Noriyuki Kumasaka ,  Yoshihiro Shiroishi ,  Hitoshi Nakamura ,  Yoshihiro Hamakawa ,  Noritoshi Saito ,  Shigeo Aoki ,  Kiminari Shinagawa ,  Mitsuhiro Kudo

发明人： Kazuo Shiiki ,  Noriyuki Kumasaka ,  Yoshihiro Shiroishi ,  Hitoshi Nakamura ,  Yoshihiro Hamakawa ,  Noritoshi Saito ,  Shigeo Aoki ,  Kiminari Shinagawa ,  Mitsuhiro Kudo

IPC分类号： C22C38/02 ,  G11B5/127 ,  G11B5/21 ,  G11B5/31 ,  H01F1/147 ,  H01F10/14 ,  B32B1/04

CPC分类号： H01F1/14766 ,  C22C38/02 ,  G11B5/1278 ,  G11B5/21 ,  G11B5/31 ,  H01F10/145 ,  H01F10/265 ,  Y10S428/928 ,  Y10T428/115 ,  Y10T428/12632 ,  Y10T428/12937 ,  Y10T428/12951

摘要： A ferromagnetic material is composed of an iron alloy which contains 2 to 12% by weight of silicon and 5 to 25% by weight of at least one element selected from the group consisting of ruthenium, rhodium, palladium, iridium, platinum, gold and silver. This ferromagnetic material exhibits a high saturation flux density and good corrosion resistance. Excellent magnetic characteristics are obtained by a multilayered film which is obtained by alternatingly laminating the above ferromagnetic material and a spacer layer composed of other material. Further, a markedly increased recording density is exhibited by a magnetic head for perpendicular magnetic recording, when the end of the main pole is composed of the ferromagnetic material.

摘要翻译： 铁磁材料由含有2〜12重量％的硅和5〜25重量％的选自钌，铑，钯，铱，铂，金和银中的至少一种元素的铁合金构成 。 该铁磁材料表现出高的饱和磁通密度和良好的耐腐蚀性。 通过交替层叠上述铁磁材料和由其它材料构成的间隔层获得的多层膜获得优异的磁特性。 此外，当主极的端部由铁磁材料构成时，用于垂直磁记录的磁头显示出显着增加的记录密度。

公开(公告)号：US4881144A

公开(公告)日：1989-11-14

申请号：US142697

申请日：1988-01-11

申请人： Isamu Yuito ,  Eijin Moriwaki ,  Kazuo Shiiki ,  Yoshihiro Hamakawa ,  Hisashi Takano

发明人： Isamu Yuito ,  Eijin Moriwaki ,  Kazuo Shiiki ,  Yoshihiro Hamakawa ,  Hisashi Takano

IPC分类号： G11B5/31

CPC分类号： G11B5/3163

摘要： In a thin film magnetic head of the type wherein a lower magnetic pole, a gap layer, a first insulating layer, a coil, a second insulating layer and an upper magnetic pole are formed sequentially on a substrate, the present invention provides a thin film magnetic head characterized in that a surface active layer made of aluminum oxide, for example, is disposed between the first insulating layer and the second insulating layer except where the coil is formed on the first insulating layer so that the surface active layer is disposed between the coil and the second insulating layer. According to the present invention, it is possible to prevent the occurrence of bubbles between coil conductors, and eventually to improve flatness of the surface of the second insulating layer and to prevent degradation of the characteristics of the upper magnetic pole.

摘要翻译： 在基板上依次形成下列磁极，间隙层，第一绝缘层，线圈，第二绝缘层和上磁极的薄膜磁头，本发明提供一种薄膜 磁头，其特征在于，例如在第一绝缘层和第二绝缘层之间设置由氧化铝制成的表面有源层，除了在第一绝缘层上形成线圈之外，表面活性层设置在第一绝缘层之间 线圈和第二绝缘层。 根据本发明，能够防止线圈导体之间产生气泡，最终提高第二绝缘层的表面的平坦性，防止上磁极的特性劣化。

公开(公告)号：US5126907A

公开(公告)日：1992-06-30

申请号：US525666

申请日：1990-05-21

申请人： Yoshihiro Hamakawa ,  Isamu Yuito ,  Hisashi Takano ,  Naoki Koyama ,  Eijin Moriwaki ,  Shinobu Sasaki ,  Kazuo Shiiki

发明人： Yoshihiro Hamakawa ,  Isamu Yuito ,  Hisashi Takano ,  Naoki Koyama ,  Eijin Moriwaki ,  Shinobu Sasaki ,  Kazuo Shiiki

IPC分类号： G11B5/31

CPC分类号： G11B5/3153 ,  G11B5/3113

摘要： A thin film magnetic head has a first magnetic core member carried by a substrate, a gap layer formed on the first magnetic core member, and a second magnetic core member formed in a spaced relation with the first magnetic core member. The second magnetic core member is coupled to the first magnetic core member to form a magnetic path and to have an end portion of the gap layer sandwiched by gap defining portions of the first and second magnetic core members. A coil conductor is wound about the magnetic path. In one embodiment, the first magnetic core member includes a first magnetic layer made of a magnetic material having stable magnetic properties during heat treatment and the second magnetic core member includes a second magnetic layer made of a material having a saturation flux density higher than that of the material of the first magnetic core member.

摘要翻译： 薄膜磁头具有由基板承载的第一磁芯构件，形成在第一磁芯构件上的间隙层和与第一磁芯构件间隔开地形成的第二磁芯构件。 第二磁芯部件耦合到第一磁芯部件以形成磁路，并且间隙层的端部夹在第一和第二磁芯部件的间隙限定部分之间。 线圈导体缠绕在磁路上。 在一个实施例中，第一磁芯构件包括由在热处理期间具有稳定磁特性的磁性材料制成的第一磁性层，第二磁芯构件包括由饱和磁通密度高于 第一磁芯构件的材料。

公开(公告)号：US5719729A

公开(公告)日：1998-02-17

申请号：US990769

申请日：1992-12-15

申请人： Naoki Koyama ,  Yoshihiro Hamakawa ,  Isamu Yuitoo ,  Kanji Kawakami ,  Kazuo Shiiki ,  Masahiro Kitada

发明人： Naoki Koyama ,  Yoshihiro Hamakawa ,  Isamu Yuitoo ,  Kanji Kawakami ,  Kazuo Shiiki ,  Masahiro Kitada

IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/265

CPC分类号： G11B5/3967

摘要： In an inductive-write, magnetoresistive-read type magnetic head having a magnetoresistive read head and an inductive write head superimposed on each other, the magnetic center of the read head is made more coincident with the physical center of the write head by a changing of a magnetization direction of a magnetoresistive element. The recording/reproducing apparatus using this magnetic head can thus have a good S/N ratio even if the track width is narrow.

摘要翻译： 在具有叠加在一起的磁阻读取头和感应写入头的感应写入磁阻读取型磁头中，通过改变读写头的磁中心使写头的磁心与记录头的物理中心更一致 磁阻元件的磁化方向。 因此，即使磁道宽度窄，使用该磁头的记录/再现装置也可以具有良好的S / N比。

公开(公告)号：US4760481A

公开(公告)日：1988-07-26

申请号：US888116

申请日：1986-07-22

申请人： Isamu Yuito ,  Eijin Moriwaki ,  Kazuo Shiiki ,  Keiko Shiokawa ,  Yoshihiro Hamakawa ,  Saburo Suzuki ,  Harunobu Saito

发明人： Isamu Yuito ,  Eijin Moriwaki ,  Kazuo Shiiki ,  Keiko Shiokawa ,  Yoshihiro Hamakawa ,  Saburo Suzuki ,  Harunobu Saito

IPC分类号： B07B13/02 ,  B07B13/18 ,  G11B5/31 ,  G11B5/20 ,  G11B5/12

CPC分类号： G11B5/3163

摘要： Disclosed is a thin film magnetic head having a structure wherein the main portion of a coil consists of a copper or copper alloy layer and its upper surface is covered with a thin film mask consisting of titanium, titanium oxide, chromium and/or chromium oxide. The magnetic head of the invention can prevent the occurrence of projecting etching residues at the upper edge portion of the coil and can easily increase the cross-sectional area and the winding density of the coil. Furthermore, when the thin film mask consists of titanium and/or titanium oxide, a titanium diffusion prevention film consisting of chromium, for example, is interposed between the thin film mask and the copper or copper alloy, so that the resistance change of the coil scarcely takes place owing to heat treatment in a production process after the formation of the coil and the head reliability can be further improved.

摘要翻译： 公开了一种薄膜磁头，其结构是线圈的主要部分由铜或铜合金层组成，其上表面被由钛，氧化钛，铬和/或氧化铬组成的薄膜掩模覆盖。 本发明的磁头可以防止在线圈的上边缘部分产生突出的蚀刻残留物，并且可以容易地增加线圈的横截面面积和卷绕密度。 此外，当薄膜掩模由钛和/或氧化钛组成时，例如由铬组成的钛扩散防止膜插入在薄膜掩模和铜或铜合金之间，使得线圈的电阻变化 由于在线圈形成后的生产过程中的热处理几乎不发生，并且可以进一步提高头的可靠性。

公开(公告)号：US06515837B1

公开(公告)日：2003-02-04

申请号：US09662643

申请日：2000-09-15

申请人： Yoshihiro Hamakawa ,  Shiroyasu Odai ,  Katsumi Hoshino

发明人： Yoshihiro Hamakawa ,  Shiroyasu Odai ,  Katsumi Hoshino

IPC分类号： G11B539

CPC分类号： G11B5/3903 ,  G11B5/3109 ,  G11B5/3133 ,  G11B5/3146

摘要： There is provided a magnetoresistive head which is capable of suppressing the fluctuation of read output while ensuring a sufficient dielectric breakdown voltage of the shielding portions by constituting the shielding portions with a Co-based material. Namely, the lower shield film is formed of a 2-ply composite film wherein the film (12′) of the lower shield film which is disposed contacting with the lower gap insulation film (13) is constituted by an amorphous soft magnetic film, while the film (12) which is disposed away from the lower gap insulation film is constituted by a crystalline soft magnetic film, thereby making it possible to suppress the fluctuation of read output even if the gap is narrowed without deteriorating the yield relative to the dielectric breakdown.

摘要翻译： 提供了一种磁阻头，其能够通过用Co基材料构成屏蔽部分来确保屏蔽部分的足够的介电击穿电压，从而抑制读取输出的波动。 也就是说，下屏蔽膜由2层复合膜形成，其中下屏蔽膜的与下间隙绝缘膜（13）接触的膜（12'）由非晶软磁膜构成，而 离开下间隔绝缘膜设置的膜（12）由结晶软磁膜构成，从而即使间隙变窄而不会使相对于介质击穿的屈服劣化也可以抑制读取输出的波动 。

公开(公告)号：US06327123B1

公开(公告)日：2001-12-04

申请号：US09368472

申请日：1999-08-04

申请人： Yoshiaki Kawato ,  Hiroshi Fukui ,  Kenichi Meguro ,  Yoshihiro Hamakawa

发明人： Yoshiaki Kawato ,  Hiroshi Fukui ,  Kenichi Meguro ,  Yoshihiro Hamakawa

IPC分类号： G11B5127

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/3996

摘要： A magnetic head is provided with a magnetoresistive sensor scarcely susceptible to heat and provided with a fixed layer capable of creating a pinned magnetic field of a sufficient intensity. The magnetic head comprises a magnetoresistive effect film having a free layer (21), a fixed layer (105) and an intermediate layer (104), and a pair of electrodes (25a, 25b) for supplying current to the magnetoresistance effect film. The free layer (21) is formed of a ferromagnetic material and the intermediate layer (104) is formed of a nonmagnetic material. The fixed layer (105) has a first ferromagnetic film (22), a second ferromagnetic film (24) and a nonmagnetic film (23) sandwiched between the first and the second ferromagnetic films (22, 24). The second ferromagnetic film (24) farther from the free layer (21) than the first ferromagnetic layer (22) is formed of a material having the property of permanent magnets. The magnetization of the fist ferromagnetic film (22) and that of the second ferromagnetic film (24) are coupled in an antiferromagnetic coupling fashion.

摘要翻译： 磁头设置有几乎不易受热的磁阻传感器，并且具有能够产生足够强度的固定磁场的固定层。 磁头包括具有自由层（21），固定层（105）和中间层（104）的磁阻效应膜和用于向磁阻效应膜提供电流的一对电极（25a，25b）。 自由层（21）由铁磁材料形成，中间层（104）由非磁性材料形成。 固定层（105）具有夹在第一和第二铁磁性膜（22,24）之间的第一铁磁膜（22），第二铁磁膜（24）和非磁性膜（23）。 离开自由层（21）比第一铁磁层（22）更远的第二铁磁膜（24）由具有永磁体性质的材料形成。 第一铁磁膜（22）和第二铁磁膜（24）的磁化以反铁磁耦合方式耦合。