公开(公告)号：US20050185339A1

公开(公告)日：2005-08-25

申请号：US10911578

申请日：2004-08-05

申请人： Nobuyuki Ishiwata ,  Hiroaki Honjo ,  Tamaki Toba ,  Shinsaku Saito ,  Yoshihiro Nonaka ,  Tsutomu Ishi ,  Mikiko Saito ,  Keishi Ohashi

发明人： Nobuyuki Ishiwata ,  Hiroaki Honjo ,  Tamaki Toba ,  Shinsaku Saito ,  Yoshihiro Nonaka ,  Tsutomu Ishi ,  Mikiko Saito ,  Keishi Ohashi

IPC分类号： G11B5/127 ,  G11B5/31 ,  G11B5/147

CPC分类号： G11B5/3109 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3146 ,  G11B5/3163

摘要： A recording head is a magnetic head in which ends on one side of opposed first and second magnetic cores form a recording gap, said other ends form a magnetic joint, coils insulated by an insulating material are provided between said first and second magnetic cores, magnetic fluxes of said first and second magnetic cores excited by said coils leak from said recording gap so that recording onto a recording medium is carried out. In said recording head, a distance from said end of said recording gap close to said magnetic medium to a contact point of said magnetic joint (hereinafter, yoke length) is not more than 20 μm. A magnetic recording/reproduction apparatus has this head.

摘要翻译： 记录头是磁头，其中在相对的第一和第二磁芯的一侧上的端部形成记录间隙，所述另一端形成磁性接头，在所述第一和第二磁芯之间设置由绝缘材料绝缘的线圈，磁性 由所述线圈激励的所述第一和第二磁芯的磁通从所述记录间隙泄漏，从而进行到记录介质上的记录。 在所述记录头中，从所述记录间隙的接近所述磁介质的端部到所述磁性接头的接触点（以下称为磁轭长度）的距离不大于20微米。 磁记录/再现装置具有该磁头。

公开(公告)号：US07173793B2

公开(公告)日：2007-02-06

申请号：US10911578

申请日：2004-08-05

申请人： Nobuyuki Ishiwata ,  Hiroaki Honjo ,  Tamaki Toba ,  Shinsaku Saito ,  Yoshihiro Nonaka ,  Tsutomu Ishi ,  Mikiko Saito ,  Keishi Ohashi

发明人： Nobuyuki Ishiwata ,  Hiroaki Honjo ,  Tamaki Toba ,  Shinsaku Saito ,  Yoshihiro Nonaka ,  Tsutomu Ishi ,  Mikiko Saito ,  Keishi Ohashi

IPC分类号： G11B5/147

CPC分类号： G11B5/3109 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3146 ,  G11B5/3163

摘要： A recording head is a magnetic head in which ends on one side of opposed first and second magnetic cores form a recording gap, said other ends form a magnetic joint, coils insulated by an insulating material are provided between said first and second magnetic cores, magnetic fluxes of said first and second magnetic cores excited by said coils leak from said recording gap so that recording onto a recording medium is carried out. In said recording head, a distance from said end of said recording gap close to said magnetic medium to a contact point of said magnetic joint (hereinafter, yoke length) is not more than 20 μm. A magnetic recording/reproduction apparatus has this head.

摘要翻译： 记录头是磁头，其中在相对的第一和第二磁芯的一侧上的端部形成记录间隙，所述另一端形成磁性接头，在所述第一和第二磁芯之间设置由绝缘材料绝缘的线圈，磁性 由所述线圈激励的所述第一和第二磁芯的磁通从所述记录间隙泄漏，从而进行到记录介质上的记录。 在所述记录头中，从所述记录间隙的接近所述磁介质的端部到所述磁性接头的接触点（以下称为磁轭长度）的距离不大于20微米。 磁记录/再现装置具有该磁头。

公开(公告)号：US06795271B2

公开(公告)日：2004-09-21

申请号：US09748214

申请日：2000-12-27

申请人： Nobuyuki Ishiwata ,  Hiroaki Honjo ,  Tamaki Toba ,  Shinsaku Saito ,  Yoshihiro Nonaka ,  Tsutomu Ishi ,  Mikiko Saito ,  Keishi Ohashi

发明人： Nobuyuki Ishiwata ,  Hiroaki Honjo ,  Tamaki Toba ,  Shinsaku Saito ,  Yoshihiro Nonaka ,  Tsutomu Ishi ,  Mikiko Saito ,  Keishi Ohashi

IPC分类号： G11B5147

CPC分类号： G11B5/3109 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3146 ,  G11B5/3163

摘要： A recording head is a magnetic head in which ends on one side of opposed first and second magnetic cores form a recording gap, said other ends form a magnetic joint, coils insulated by an insulating material are provided between said first and second magnetic cores, magnetic fluxes of said first and second magnetic cores excited by said coils leak from said recording gap so that recording onto a recording medium is carried out. In said recording head, a distance from said end of said recording gap close to said magnetic medium to a contact point of said magnetic joint (hereinafter, yoke length) is not more than 20 &mgr;m. A magnetic recording/reproduction apparatus has this head.

摘要翻译： 记录头是磁头，其中在相对的第一和第二磁芯的一侧上的端部形成记录间隙，所述另一端形成磁性接头，在所述第一和第二磁芯之间设置由绝缘材料绝缘的线圈，磁性 由所述线圈激励的所述第一和第二磁芯的磁通从所述记录间隙泄漏，从而进行到记录介质上的记录。 在所述记录头中，从所述记录间隙的接近所述磁介质的端部到所述磁性接头的接触点（以下称为磁轭长度）的距离不大于20微米。 磁记录/再现装置具有该磁头。

公开(公告)号：US06687082B1

公开(公告)日：2004-02-03

申请号：US09676788

申请日：2000-10-02

申请人： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Mikiko Saito ,  Hiroaki Honjo ,  Shinsaku Saito ,  Tamaki Toba ,  Yoshihiro Nonaka

发明人： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Mikiko Saito ,  Hiroaki Honjo ,  Shinsaku Saito ,  Tamaki Toba ,  Yoshihiro Nonaka

IPC分类号： G11B5147

CPC分类号： G11B5/3153 ,  G11B5/3163 ,  Y10T29/49044

摘要： A magnetic head and a manufacturing method of the magnetic head and a magnetic recording and reproducing apparatus used this head, in which the following problem is solved, are provided. A plated film realizing large saturation magnetization Bs about 2T can not realize a high resistivity at the same time, therefore, when this plated film is applied to a magnetic head, the high frequency characteristic is deteriorated. This problem is solved at the present invention. Further, the present invention provides a magnetic head that is low cost and has large saturation magnetization Bs, and has a excellent high frequency characteristic suitable for a high density recording. A magnetic head, in which a coil insulated by insulation layers is disposed between a first magnetic core for recording and a second magnetic core for recording that is disposed to face the first magnetic core for recording via a recording gap, and which executes recording by that a magnetic flux of the first and second magnetic cores for recording excited by the coil is generated from the recording gap, is provided. And at least one of the first and second magnetic cores for recording is composed of a first plated magnetic layer and a second plated magnetic layer in a state that the first plated magnetic layer is disposed at the near side of the recording gap, and saturation magnetization of the first plated magnetic layer is 1.7 T (tesla) or more. And when resistivity of the first plated magnetic layer is defined as &rgr;1 and the thickness of the first plated magnetic layer is defined as &dgr;1, and resistivity of the second plated magnetic layer is defined as &rgr;2, and the thickness of the second plated magnetic layer is defined as &dgr;2, &rgr;1

摘要翻译： 提供了磁头和磁头的制造方法以及使用该磁头的磁记录和再现装置，其中解决了以下问题。 实现大约2T的饱和磁化强度Bs的电镀膜不能同时实现高电阻率，因此当将该镀膜施加到磁头时，高频特性劣化。 在本发明中解决了这个问题。 此外，本发明提供一种低成本，饱和磁化强度高的磁头，并且具有优良的高密度记录特性。 一种磁头，其中通过绝缘层绝缘的线圈被设置在用于记录的第一磁芯和用于记录的第二磁芯之间，用于记录的第二磁芯经由记录间隙设置成面对第一磁芯进行记录，并且执行记录 提供了从记录间隙产生由线圈激发的记录的第一和第二磁芯的磁通量。 并且，第一和第二记录用磁芯中的至少一个由第一镀层磁性层和第二镀覆磁性层构成，第一镀层磁性层设置在记录间隙的近侧，饱和磁化强度 的第一镀层磁性层为1.7T（特斯拉）或更高。 并且，将第一镀层磁性层的电阻率定义为rho1，将第一镀覆磁性层的厚度定义为δ1，将第二镀覆磁性层的电阻率定义为rho2，将第二镀覆磁性层的厚度设为 定义为δ2，rho1

公开(公告)号：US06592811B1

公开(公告)日：2003-07-15

申请号：US09680256

申请日：2000-10-05

申请人： Mikiko Saito ,  Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Hiroaki Honjo ,  Tamaki Toba ,  Shinsaku Saito ,  Yoshihiro Nonaka

发明人： Mikiko Saito ,  Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Hiroaki Honjo ,  Tamaki Toba ,  Shinsaku Saito ,  Yoshihiro Nonaka

IPC分类号： C22C1907

CPC分类号： B82Y25/00 ,  C22C30/00 ,  G11B5/3109 ,  G11B5/3967 ,  H01F10/007 ,  H01F10/16 ,  Y10S428/90 ,  Y10T428/1121 ,  Y10T428/115

摘要： A magnetic material includes a main component expressed by a general formula CoNiFeX, wherein X is at least one element selected from the group consisting of Cr, TI, V, Ru, Rh, Os, Ir and Pt, and wherein weight percentages a, b, c and d of Co, Ni, Fe and X contents, respectively, in the main component are such that 40%≦a≦75%, 5%≦b≦20%, 10%≦c≦30%, and 0%≦d≦10%.

摘要翻译： 磁性材料包括由通式CoNiFeX表示的主要成分，其中X是选自Cr，TI，V，Ru，Rh，Os，Ir和Pt中的至少一种元素，其中重量百分比a，b 主要成分中的Co，Ni，Fe和X含量的c，d分别为40％<= a <= 75％，5％<= b <= 20％，10％<= c < 30％，0％<= d <= 10％。

公开(公告)号：US07023659B2

公开(公告)日：2006-04-04

申请号：US10815069

申请日：2004-03-31

申请人： Hiroaki Honjo ,  Tsutomu Ishi ,  Mikiko Saito ,  Shinsaku Saito ,  Tamaki Toba ,  Yoshihiro Nonaka ,  Kazuhiko Hayashi ,  Nobuyuki Ishiwata

发明人： Hiroaki Honjo ,  Tsutomu Ishi ,  Mikiko Saito ,  Shinsaku Saito ,  Tamaki Toba ,  Yoshihiro Nonaka ,  Kazuhiko Hayashi ,  Nobuyuki Ishiwata

IPC分类号： G11B5/147

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/3103 ,  G11B5/3109 ,  G11B5/3116 ,  G11B5/3133 ,  G11B5/314 ,  G11B5/3143 ,  G11B5/3163 ,  G11B5/3967 ,  G11B5/40 ,  G11B2005/3996 ,  Y10T29/49044

摘要： By inserting a first antistripping layer comprising a first non-magnetic layer 22 and a first conductive layer 23 between a first magnetic layer 16 and a magnetic separation layer 13, adhesion between the first conductive layer 23 and the magnetic separation layer 13 is improved to prevent the first magnetic layer 16 from stripping. In addition, by inserting a second antistripping layer comprising a second non-magnetic layer 24 and a second conductive layer 25 between a second magnetic layer 21 and a magnetic gap layer 17, adhesion between the second conductive layer 24 and the magnetic gap layer 17 is improved to prevent the second magnetic layer 25 from stripping.

公开(公告)号：US20060119982A1

公开(公告)日：2006-06-08

申请号：US11329919

申请日：2006-01-10

申请人： Hiroaki Honjo ,  Tsutomu Ishi ,  Mikiko Saito ,  Shinsaku Saito ,  Tamaki Toba ,  Yoshihiro Nonaka ,  Kazuhiko Hayashi ,  Nobuyuki Ishiwata

发明人： Hiroaki Honjo ,  Tsutomu Ishi ,  Mikiko Saito ,  Shinsaku Saito ,  Tamaki Toba ,  Yoshihiro Nonaka ,  Kazuhiko Hayashi ,  Nobuyuki Ishiwata

IPC分类号： G11B5/147

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/3103 ,  G11B5/3109 ,  G11B5/3116 ,  G11B5/3133 ,  G11B5/314 ,  G11B5/3143 ,  G11B5/3163 ,  G11B5/3967 ,  G11B5/40 ,  G11B2005/3996 ,  Y10T29/49044

摘要： By inserting a first antistripping layer comprising a first non-magnetic layer 22 and a first conductive layer 23 between a first magnetic layer 16 and a magnetic separation layer 13, adhesion between the first conductive layer 23 and the magnetic separation layer 13 is improved to prevent the first magnetic layer 16 from stripping. In addition, by inserting a second antistripping layer comprising a second non-magnetic layer 24 and a second conductive layer 25 between a second magnetic layer 21 and a magnetic gap layer 17, adhesion between the second conductive layer 24 and the magnetic gap layer 17 is improved to prevent the second magnetic layer 25 from stripping.

摘要翻译： 通过在第一磁性层16和磁分离层13之间插入包括第一非磁性层22和第一导电层23的第一抗锯齿层，改善了第一导电层23和磁性分离层13之间的粘附，以防止 来自剥离的第一磁性层16。 此外，通过在第二磁性层21和磁隙层17之间插入包括第二非磁性层24和第二导电层25的第二抗锯齿层，第二导电层24和磁隙层17之间的粘附是 改进以防止第二磁性层25剥离。

公开(公告)号：US06780530B2

公开(公告)日：2004-08-24

申请号：US10428836

申请日：2003-05-05

申请人： Mikiko Saito ,  Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Hiroaki Honjo ,  Tamaki Toba ,  Shinsaku Saito ,  Yoshihiro Nonaka

发明人： Mikiko Saito ,  Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Hiroaki Honjo ,  Tamaki Toba ,  Shinsaku Saito ,  Yoshihiro Nonaka

IPC分类号： B32B900

CPC分类号： B82Y25/00 ,  C22C30/00 ,  G11B5/3109 ,  G11B5/3967 ,  H01F10/007 ,  H01F10/16 ,  Y10S428/90 ,  Y10T428/1121 ,  Y10T428/115

摘要： A magnetic material includes a main component expressed by a general formula CoNiFeX, wherein X is at least one element selected from the group consisting of Cr, Ti, V, Ru, Rh, Pd, Os, Ir and Pt, and wherein weight percentages a, b, c and d of Co, Ni, Fe and X contents, respectively, in the main component are such that 40%≦a≦10%, 5%≦b≦20%, 10%≦c≦30%, and 0%

摘要翻译： 磁性材料包括由通式CoNiFeX表示的主要成分，其中X是选自Cr，Ti，V，Ru，Rh，Pd，Os，Ir和Pt中的至少一种元素，其中重量百分数a 主成分中Co，Ni，Fe，X含量的b，c，d分别为40％<= a <= 10％，5％<= b <= 20％，10％<= c <= 30％，0％

公开(公告)号：US06466416B1

公开(公告)日：2002-10-15

申请号：US09707805

申请日：2000-11-07

申请人： Hiroaki Honjo ,  Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Mikiko Saito ,  Shinsaku Saito ,  Tamaki Toba ,  Yoshihiro Nonaka

发明人： Hiroaki Honjo ,  Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Mikiko Saito ,  Shinsaku Saito ,  Tamaki Toba ,  Yoshihiro Nonaka

IPC分类号： G11B5127

CPC分类号： G11B5/3967 ,  G11B5/3109 ,  G11B5/313 ,  G11B5/3903

摘要： Disclosed is a magnetic heads suitable for high density recording which comprises an ID head where a CoNiFe film or a CoNiFeX film is formed by a physical vapor deposition method and further a plated film of CoNiFe etc. is formed while avoiding vanishment of a seed layer. The ID head shows high reliability and high production efficiency. The upper magnetic pole of the ID head is composed of a laminated layers of a first magnetic layer 13 of a CoNiFe film or a CoNiFeX film which is formed by a physical vapor deposition method, a second magnetic layer 14 of NiFe layer composing a seed layer laminated thereon, and a third magnetic layer 11 of CoNiFe plated film etc. further laminated on the second layer.

摘要翻译： 公开了一种适用于高密度记录的磁头，其包括通过物理气相沉积法形成CoNiFe膜或CoNiFeX膜的ID头，并且还形成CoNiFe等的镀膜，同时避免种子层的消失。 ID头显示出高可靠性和高生产效率。 ID头的上磁极由CoNiFe膜的第一磁性层13或通过物理气相沉积法形成的CoNiFeX膜的层压层构成，构成种子层的NiFe层的第二磁性层14 层压在其上，以及进一步层压在第二层上的CoNiFe镀膜等的第三磁性层11。

公开(公告)号：US07239482B2

公开(公告)日：2007-07-03

申请号：US11333897

申请日：2006-01-18

申请人： Shinsaku Saitho ,  Haruo Urai ,  Nobuyuki Ishiwata ,  Kiyotaka Shimabayashi ,  Yoshihiro Nonaka ,  Tamaki Toba

发明人： Shinsaku Saitho ,  Haruo Urai ,  Nobuyuki Ishiwata ,  Kiyotaka Shimabayashi ,  Yoshihiro Nonaka ,  Tamaki Toba

IPC分类号： G11B5/147

CPC分类号： G11B5/3967 ,  G11B5/3116 ,  G11B5/313

摘要： A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of an ABS plane, and forming an upper pole layer on the write gap layer and the second flattening layer nearby an ABS plane. A concave portion is formed on the common pole layer at a position separated from the ABS plane, the concave portion is filled with a nonmagnetic body, and the gap depth between the upper pole layer and the common pole layer is determined by the concave portion.

摘要翻译： 薄膜磁头通过在绝缘基板上依次形成下屏蔽层，保持MR磁敏元件，公共极层和写间隙层的读取间隙层，形成第一平坦化层，线圈 图案层和除了ABS平面附近的写间隙层上依次层叠的第二平坦化层，在ABS平面附近的写间隙层和第二平坦化层上形成上极层。 在与ABS平面分离的位置上的公共极层上形成有凹部，凹部填充有非磁性体，并且上极层和公共极层之间的间隙深度由凹部决定。