公开(公告)号：US07002778B2

公开(公告)日：2006-02-21

申请号：US10678863

申请日：2003-10-03

申请人： Hisayuki Yazawa

发明人： Hisayuki Yazawa

IPC分类号： G11B5/147

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3109 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3133 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/3996

摘要： A magnetic head including a lower core layer and an upper core layer, a non-magnetic gap layer and a coil layer. The upper core layer is made of an FeNiX (X being an element of one of rhenium Re and molybdenum Mo). A concentration difference of the upper core layer between a concentration of iron by weight percent and a concentration of the element X by weight percent is set to be larger at a leading edge of the upper core layer than at a position of the upper core layer more backward than the leading edge. In this arrangement, the magnetic head is provided with improved overwrite characteristics and accommodates the use of high-frequency recording signals.

摘要翻译： 包括下芯层和上芯层的磁头，非磁隙层和线圈层。 上芯层由FeNiX（X是铼Re和Mo Mo中的一种元素）制成。 铁芯重量百分比浓度与元素X的重量百分比浓度之间的上部核心层的浓度差在上部芯层的前端处比在上部芯层的位置处更大 比前沿落后。 在这种布置中，磁头具有改进的重写特性并且适应于使用高频记录信号。

公开(公告)号：US20050185341A1

公开(公告)日：2005-08-25

申请号：US11098281

申请日：2005-04-04

申请人： Shoji Ikeda ,  Takayuki Kubomiya ,  Masaaki Matsuoka

发明人： Shoji Ikeda ,  Takayuki Kubomiya ,  Masaaki Matsuoka

IPC分类号： G11B5/127 ,  G11B5/147 ,  G11B5/187 ,  G11B5/31 ,  G11B5/33

CPC分类号： G11B5/33 ,  G11B5/127 ,  G11B5/1278 ,  G11B5/187 ,  G11B5/3109 ,  G11B5/313

摘要： A magnetic head according to the present invention includes a write magnetic pole on which a magnetic film has been formed, and is characterized by the magnetic film being formed by alternately laminating magnetic layers, which have iron (Fe) and cobalt (Co) as main components, and insulating layers, the insulating layers being formed as discontinuous films. With this construction, it is possible to form a write magnetic pole that has a high Bs value and high permeability, so that it is possible to provide a magnetic head that can record onto a high-density medium with a high coercive force.

摘要翻译： 根据本发明的磁头包括其上形成有磁性膜的写入磁极，其特征在于，磁性膜通过以铁（Fe）和钴（Co）为主体交替层叠磁性层而形成 部件和绝缘层，绝缘层形成为不连续膜。 通过这种结构，可以形成具有高Bs值和高磁导率的写磁极，从而可以提供能够以高矫顽力记录在高密度介质上的磁头。

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：US06915559B1

公开(公告)日：2005-07-12

申请号：US10223049

申请日：2002-08-16

申请人： Bradford C. Schwartz ,  Steven C. Herrera

发明人： Bradford C. Schwartz ,  Steven C. Herrera

IPC分类号： G11B5/10 ,  G11B5/11 ,  G11B5/255 ,  G11B5/31 ,  G11B5/39 ,  H01F41/20 ,  G11B5/127 ,  H04R31/00

CPC分类号： G11B5/3903 ,  G11B5/10 ,  G11B5/11 ,  G11B5/255 ,  G11B5/3106 ,  G11B5/3109 ,  G11B5/3163 ,  G11B5/3954 ,  G11B5/3967 ,  Y10T29/49021 ,  Y10T29/49032 ,  Y10T29/49034 ,  Y10T29/49041 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046

摘要： A method of manufacturing an active element for use with a magnetic head includes depositing a magnetic material to form a magnetic member, and nitriding the magnetic member after the depositing step. Preferably, the depositing step comprises depositing nickel-iron alloy, and the nitriding step comprises plasma nitriding the magnetic member. Advantageously, plasma nitriding may be performed at a temperature below 300 degrees Celsius to avoid adverse effects to components of the active element, such as organic planars. Active elements manufactured according to the method of the invention are also disclosed.

摘要翻译： 制造用于磁头的有源元件的方法包括沉积磁性材料以形成磁性部件，并且在沉积步骤之后对磁性部件进行氮化。 优选地，沉积步骤包括沉积镍 - 铁合金，并且氮化步骤包括等离子体氮化磁性构件。 有利地，等离子体氮化可以在低于300摄氏度的温度下进行，以避免对活性元素（例如有机平面）的组分的不利影响。 还公开了根据本发明的方法制造的有源元件。

公开(公告)号：US06873499B2

公开(公告)日：2005-03-29

申请号：US09769165

申请日：2001-01-24

申请人： Wen Yaung Lee ,  Tsann Lin ,  Daniele Mauri ,  David John Seagle

发明人： Wen Yaung Lee ,  Tsann Lin ,  Daniele Mauri ,  David John Seagle

IPC分类号： G11B5/31 ,  G11B5/39

CPC分类号： G11B5/3109 ,  B82Y10/00 ,  G11B5/3919 ,  G11B5/3967 ,  Y10T29/49044 ,  Y10T29/49046

摘要： A read head has a flux guide layer that is immediately adjacent (abuts) the back edge of a read sensor. The flux guide layer is made of a high resistance soft magnetic material that conducts magnetic flux from the back edge of the read sensor so that the magnetic response at the back edge of the read sensor is significantly higher than zero. This increases the efficiency of the read sensor. The material for the flux guide layer is A-B-C where A is selected from the group Fe and Co, B is selected from the group Hf, Y, Ta and Zr and C is selected from the group O and N. In a preferred embodiment A-B-C is Fe—Hf—O and the Msρ of the flux guide layer is greater than 50 times the Msρ of the read sensor layer where the read sensor layer is NiFe, Ms is saturation magnetization and ρ is resistivity. Because of the flux guides high resistance current shunting losses are nearly eliminated.

摘要翻译： 读头具有与读取传感器的后边缘紧邻（邻接）的磁通引导层。 助焊剂层由高电阻软磁材料制成，其从读取传感器的后边缘传导磁通，使得读取传感器的后边缘处的磁响应明显高于零。 这增加了读取传感器的效率。 助焊剂层的材料是ABC，其中A选自Fe和Co组，B选自Hf，Y，Ta和Zr组，C选自O和N组。在优选实施方案中，ABC是 磁通导向层的Fe-Hf-O和Msrho大于读取传感器层为NiFe的读取传感器层的Msrho的50倍，Ms为饱和磁化强度，rho为电阻率。 由于磁通导向器高阻电流分流损耗几乎消除。

公开(公告)号：US20050024957A1

公开(公告)日：2005-02-03

申请号：US10631940

申请日：2003-07-30

申请人： Savas Gider ,  Wen-Chien Hsiao

发明人： Savas Gider ,  Wen-Chien Hsiao

IPC分类号： G11B5/10 ,  G11B5/105 ,  G11B5/17 ,  G11B5/31 ,  G11B5/40 ,  G11C7/00

CPC分类号： G11B5/3136 ,  G11B5/10 ,  G11B5/105 ,  G11B5/17 ,  G11B5/3103 ,  G11B5/3109 ,  G11B5/313 ,  G11B5/3133 ,  G11B5/40

摘要： A magnetic head for reading information from and writing information to a hard magnetic disk having reduced thermal protrusion at the air bearing surface. In some embodiments, a read-head portion of the magnetic head includes one or more read insulation layers, and a write-head portion of the magnetic head includes one or more write insulation layers. The magnetic head may optionally further include one or more insulation layers between the read-head portion and the write-head portion. One or more of these insulation layers includes a material with a negative thermal expansion characteristic, including but not limited to, carbon fiber, zirconium tungstate (Zr W2 O8), or hafnium tungstate (Hf W2 O8).

摘要翻译： 一种磁头，用于从具有减小的在空气轴承表面处的热突起的硬磁盘读取信息并向其写入信息。 在一些实施例中，磁头的读取头部分包括一个或多个读取绝缘层，磁头的写入头部分包括一个或多个写入绝缘层。 磁头可以可选地还包括在读取头部分和写入头部分之间的一个或多个绝缘层。 这些绝缘层中的一种或多种包括具有负热膨胀特性的材料，包括但不限于碳纤维，钨酸锆（Zr W2 O8）或钨酸铪（HfW 2 O 8）。

公开(公告)号：US06822832B2

公开(公告)日：2004-11-23

申请号：US10101347

申请日：2002-03-20

申请人： Yasuhiko Shinjo

发明人： Yasuhiko Shinjo

IPC分类号： G11B5127

CPC分类号： G11B5/3109 ,  G11B5/00813 ,  G11B5/313 ,  G11B5/3146 ,  G11B5/3163

摘要： A non-magnetic layer is laminated on a lower magnetic layer. A first upper magnetic layer is formed on the non-magnetic layer so as to form a magnetic core together with the lower magnetic layer and the non-magnetic layer. The first upper magnetic layer has a first saturation magnetic flux density and a first magnetostriction constant. An insulation layer is formed on the non-magnetic layer. A thin film coil is provided in the insulation layer. A second upper magnetic layer is formed on the insulation layer so as to be at least above the thin film coil. The second upper magnetic layer has a second saturation magnetic flux density and a second magnetostriction constant. The first saturation magnetic flux density is higher than the second saturation magnetic flux density. The second magnetostriction constant is lower than the first magnetostriction constant.

摘要翻译： 非磁性层层叠在下磁性层上。 第一上磁性层形成在非磁性层上，以便与下磁性层和非磁性层一起形成磁芯。 第一上磁层具有第一饱和磁通密度和第一磁致伸缩常数。 在非磁性层上形成绝缘层。 在绝缘层中设置薄膜线圈。 第二上磁性层形成在绝缘层上，以便至少在薄膜线圈的上方。 第二上磁层具有第二饱和磁通密度和第二磁致伸缩常数。 第一饱和磁通密度高于第二饱和磁通密度。 第二磁致伸缩常数低于第一磁致伸缩常数。

公开(公告)号：US06822831B2

公开(公告)日：2004-11-23

申请号：US10074185

申请日：2002-02-12

申请人： Shoji Ikeda ,  Yuji Uehara ,  Ikuya Tagawa ,  Naoki Takeguchi ,  Masahiro Kakehi

发明人： Shoji Ikeda ,  Yuji Uehara ,  Ikuya Tagawa ,  Naoki Takeguchi ,  Masahiro Kakehi

IPC分类号： G11B5147

CPC分类号： H01F10/147 ,  G11B5/3109 ,  H01F10/131 ,  H01F10/138 ,  H01F10/265 ,  Y10S428/90

摘要： An object of the present invention is to provide a recording head having a magnetic pole simultaneously possessing a high saturation magnetic flux density, a high permeability and a high electric resistivity, and the magnetic pole of the recording head is a polycrystalline film comprising Fe whose content is not less than 57.5 atomic % and not more than 94.5 atomic %; one or more kinds of elements selected from the element group of Al, B, Ga, Si, Ge, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and Rh, whose whole content is not less than 1 atomic % and not more than 15 atomic %; N whose content is not less than 0.5 atomic % and not more than 10 atomic %; and O whose content is not less than 1.5 atomic % and not more than 22.5 atomic %.

摘要翻译： 本发明的目的是提供一种具有同时具有高饱和磁通密度，高磁导率和高电阻率的磁极的记录头，记录头的磁极是包含Fe的多晶膜，其含量 不小于57.5原子％且不大于94.5原子％; 选自Al，B，Ga，Si，Ge，Y，Ti，Zr，Hf，V，Nb，Ta，Cr，Mo，W和Rh的元素组中的一种或多种元素，其全部含量不少于 1原子％以上15原子％以下。 N含量不小于0.5原子％且不大于10原子％; 其含量不小于1.5原子％且不大于22.5原子％。