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1. 发明申请

US20140063647A1 EASY AXIS HARD BIAS STRUCTURE 有权
标题翻译：轻松的轴偏差结构
公开(公告)号：US20140063647A1
公开(公告)日：2014-03-06
申请号：US13605934
申请日：2012-09-06
申请人： Norihiro Okawa , Koji Sakamoto , Koji Okazaki
发明人： Norihiro Okawa , Koji Sakamoto , Koji Okazaki
IPC分类号： G11B5/33 , G11B21/02 , B82Y30/00
CPC分类号： G11B5/3932 , B82Y25/00 , G01R33/093 , G11B5/1278 , G11B5/3163 , H01F10/3254 , Y10T428/11 , Y10T428/1157 , Y10T428/1171
摘要： In one embodiment, a magnetic head includes a sensor stack of thin films including a free layer; a hard bias structure comprising a first foundation layer, a second foundation layer formed on the first foundation layer and a hard bias layer formed above the second foundation layer, wherein portions of the first and second foundation layers positioned along a side wall of the sensor stack have a discrete island structure. Additional embodiments are also disclosed.
摘要翻译：在一个实施例中，磁头包括包括自由层的薄膜的传感器堆叠; 包括第一基础层，形成在第一基础层上的第二基础层和形成在第二基础层上方的硬偏置层的硬偏压结构，其中第一和第二基础层沿传感器堆叠的侧壁定位的部分具有离散的岛结构。还公开了另外的实施例。

2. 发明授权

US08339753B1 Magnetic bias structure for magnetoresistive sensor 有权
标题翻译：磁阻传感器的磁偏置结构
公开(公告)号：US08339753B1
公开(公告)日：2012-12-25
申请号：US13271015
申请日：2011-10-11
申请人： Norihiro Okawa , Koji Sakamoto , Koji Okazaki
发明人： Norihiro Okawa , Koji Sakamoto , Koji Okazaki
IPC分类号： G11B5/39
CPC分类号： G11B5/3932 , B82Y10/00 , G11B2005/3996
摘要： A magnetic read head having a novel magnetic bias structure that provides improved magnetic biasing for improved free layer robustness and reduced Barkhausen noise. The bias structure includes hard magnetic layer formed over first and second under-layers. At least a portion of the first under-layer is formed as discrete islands of material, and the second under-layer is formed over the first under-layer. The first under-layer has a thickness of 0.25 to 0.75 nm. The novel seed layer structure causes hard magnetic layer to have a magnetic anisotropy that is substantially parallel with the free layer of the sensor stack even in regions adjacent to the sensor stack.
摘要翻译：具有新的磁偏置结构的磁读头，其提供改进的磁偏置，以改善自由层鲁棒性和降低的巴克豪森噪声。偏置结构包括在第一和第二下层上形成的硬磁性层。第一底层的至少一部分形成为离散的材料岛，并且第二底层形成在第一底层之上。第一底层具有0.25至0.75nm的厚度。新颖的种子层结构使得硬磁性层具有磁性各向异性，即使在与传感器堆叠相邻的区域中，磁各向异性基本上与传感器堆叠的自由层平行。

3. 发明授权

US08964336B2 Easy axis hard bias structure 有权
标题翻译：易轴硬偏置结构
公开(公告)号：US08964336B2
公开(公告)日：2015-02-24
申请号：US13605934
申请日：2012-09-06
申请人： Norihiro Okawa , Koji Sakamoto , Koji Okazaki
发明人： Norihiro Okawa , Koji Sakamoto , Koji Okazaki
IPC分类号： G11B5/39
CPC分类号： G11B5/3932 , B82Y25/00 , G01R33/093 , G11B5/1278 , G11B5/3163 , H01F10/3254 , Y10T428/11 , Y10T428/1157 , Y10T428/1171
摘要： In one embodiment, a magnetic head includes a sensor stack of thin films including a free layer; a hard bias structure comprising a first foundation layer, a second foundation layer formed on the first foundation layer and a hard bias layer formed above the second foundation layer, wherein portions of the first and second foundation layers positioned along a side wall of the sensor stack have a discrete island structure. Additional embodiments are also disclosed.
摘要翻译：在一个实施例中，磁头包括包括自由层的薄膜的传感器堆叠; 包括第一基础层，形成在第一基础层上的第二基础层和形成在第二基础层上方的硬偏置层的硬偏压结构，其中第一和第二基础层沿传感器堆叠的侧壁定位的部分具有离散的岛结构。还公开了另外的实施例。

4. 发明授权

US08373943B2 Magnetic head having a multilayer magnetic film and method for producing the same 有权
标题翻译：具有多层磁性膜的磁头及其制造方法
公开(公告)号：US08373943B2
公开(公告)日：2013-02-12
申请号：US12941953
申请日：2010-11-08
申请人： Kan Yasui , Nobuo Yoshida , Katsuro Watanabe , Norihiro Okawa
发明人： Kan Yasui , Nobuo Yoshida , Katsuro Watanabe , Norihiro Okawa
IPC分类号： G11B5/127
CPC分类号： G11B5/398 , B82Y25/00 , G01R33/093 , G01R33/098 , G11B5/02 , G11B5/1278 , G11B5/3146 , G11B5/3163 , G11B5/3906 , G11B2005/0002 , G11B2005/0024 , H01F10/3254 , H01F10/3263 , H01F10/329
摘要： According to one embodiment, a method for producing a magnetic head includes depositing a first film above a substrate, etching a pattern into the first film, depositing a second film on the etched portion of the first film, and depositing a third film above the first and second film to form a multilayer magnetic film, wherein the second film is embedded between the first and third film in a portion of the first film that is removed. In another embodiment, a differential magnetic read head includes a magnetic multilayer film comprising a stack of a first magnetic sensor film and a second magnetic sensor film which are not magnetically connected and a hard magnetic film provided on both sides in a track width direction of the magnetic multilayer film for controlling a magnetic domain of the magnetic multilayer film. The hard magnetic film is a laminated structure as described above.
摘要翻译：根据一个实施例，一种用于制造磁头的方法包括在基板上沉积第一膜，将图案蚀刻到第一膜中，在第一膜的蚀刻部分上沉积第二膜，以及在第一膜上沉积第三膜和第二膜以形成多层磁性膜，其中第二膜在被去除的第一膜的一部分中嵌入第一和第三膜之间。在另一个实施例中，差分磁读头包括磁性多层膜，该磁性多层膜包括不磁性连接的第一磁性传感器膜和第二磁性传感器膜的叠层，以及设置在第二磁性传感器膜的轨道宽度方向上的两侧的硬磁性膜用于控制磁性多层膜的磁畴的磁性多层膜。硬磁性膜是如上所述的层叠结构。

5. 发明申请

US20110116184A1 MAGNETIC HEAD HAVING A MULTILAYER MAGNETIC FILM AND METHOD FOR PRODUCING THE SAME 有权
标题翻译：具有多层磁性膜的磁头及其制造方法
公开(公告)号：US20110116184A1
公开(公告)日：2011-05-19
申请号：US12941953
申请日：2010-11-08
申请人： Kan Yasui , Nobuo Yoshida , Katsuro Watanabe , Norihiro Okawa
发明人： Kan Yasui , Nobuo Yoshida , Katsuro Watanabe , Norihiro Okawa
IPC分类号： G11B5/127 , G11B21/02 , G11B5/02
CPC分类号： G11B5/398 , B82Y25/00 , G01R33/093 , G01R33/098 , G11B5/02 , G11B5/1278 , G11B5/3146 , G11B5/3163 , G11B5/3906 , G11B2005/0002 , G11B2005/0024 , H01F10/3254 , H01F10/3263 , H01F10/329
摘要： According to one embodiment, a method for producing a magnetic head includes depositing a first film above a substrate, etching a pattern into the first film, depositing a second film on the etched portion of the first film, and depositing a third film above the first and second film to form a multilayer magnetic film, wherein the second film is embedded between the first and third film in a portion of the first film that is removed. In another embodiment, a differential magnetic read head includes a magnetic multilayer film comprising a stack of a first magnetic sensor film and a second magnetic sensor film which are not magnetically connected and a hard magnetic film provided on both sides in a track width direction of the magnetic multilayer film for controlling a magnetic domain of the magnetic multilayer film. The hard magnetic film is a laminated structure as described above.
摘要翻译：根据一个实施例，一种用于制造磁头的方法包括在基板上沉积第一膜，将图案蚀刻到第一膜中，在第一膜的蚀刻部分上沉积第二膜，以及在第一膜上沉积第三膜和第二膜以形成多层磁性膜，其中第二膜在被去除的第一膜的一部分中嵌入第一和第三膜之间。在另一个实施例中，差分磁读头包括磁性多层膜，该磁性多层膜包括不磁性连接的第一磁性传感器膜和第二磁性传感器膜的叠层，以及设置在第二磁性传感器膜的轨道宽度方向上的两侧的硬磁性膜用于控制磁性多层膜的磁畴的磁性多层膜。硬磁性膜是如上所述的层叠结构。

6. 外观设计

USD481719S1 Personal digital assistant 失效
公开(公告)号：USD481719S1
公开(公告)日：2003-11-04
申请号：US29166814
申请日：2002-09-03
申请人： Norihiro Okawa , Hideki Nishimura
设计人： Norihiro Okawa , Hideki Nishimura

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