专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US07382586B2 Magnetic read sensor employing oblique etched underlayers for inducing uniaxial magnetic anisotropy in a self biased free layer 失效
标题翻译：使用倾斜蚀刻底层的磁性读取传感器，用于在自偏压自由层中诱导单轴磁各向异性
公开(公告)号：US07382586B2
公开(公告)日：2008-06-03
申请号：US11177990
申请日：2005-07-07
申请人： Matthew Joseph Carey , Jeffrey Robinson Childress , James L. Nix , Stefan Maat , Ian Robson McFadyen
发明人： Matthew Joseph Carey , Jeffrey Robinson Childress , James L. Nix , Stefan Maat , Ian Robson McFadyen
IPC分类号： G11B5/39
CPC分类号： H01F10/3272 , B82Y25/00 , B82Y40/00 , G11B5/3932 , H01F10/16 , H01F10/30 , H01F41/306 , H01L43/08 , H01L43/12
摘要： A magnetoresistive sensor having a self biased free layer. The free layer is constructed upon an underlayer that has been treated by a surface texturing process that configures the underlayer with an anisotropic roughness that induces a magnetic anisotropy in the free layer. The treated layer underlying the free layer can be a spacer layer sandwiched between the free layer and pinned layer or can be a separate underlayer formed opposite the spacer layer. Alternatively, the texturing of an underlayer can be used to induce a magnetic anisotropy in a bias layer that is separated from the free layer by an orthogonal coupling layer. This self biasing of the free layer induced by texturing can also be used in conjunction with biasing from a hard-bias structure.
摘要翻译：具有自偏置自由层的磁阻传感器。自由层被构造在已经通过表面纹理化处理处理的底层上，该表面构造过程用在各自自由层中引起磁各向异性的各向异性粗糙度来构造底层。自由层下面的处理层可以是夹在自由层和被钉扎层之间的间隔层，或者可以是与间隔层相对形成的单独的下层。或者，底层的纹理化可以用于在通过正交耦合层与自由层分离的偏压层中引起磁各向异性。由纹理引起的自由层的这种自偏压也可以与来自硬偏压结构的偏压结合使用。

2. 发明申请

US20080112080A1 Magnetic write head employing multiple magnetomotive force (MMF) sources 审中-公开
标题翻译：使用多个磁动势（MMF）源的磁写头
公开(公告)号：US20080112080A1
公开(公告)日：2008-05-15
申请号：US11598419
申请日：2006-11-13
申请人： Byron Hassberg Lengsfield , Ian Robson McFadyen , James L. Nix , James Terrence Olson , Petrus Antonius Van Der Heijden , Bruce Wilson
发明人： Byron Hassberg Lengsfield , Ian Robson McFadyen , James L. Nix , James Terrence Olson , Petrus Antonius Van Der Heijden , Bruce Wilson
IPC分类号： G11B5/127
CPC分类号： G11B5/3123 , G11B5/1278 , G11B5/17 , G11B5/3143
摘要： A write head for perpendicular magnetic recording having a write pole and first and second return poles. The write head can include a first magnetomotive force source for delivering a magnetomotive force to the first return pole and the write pole and a second magnetomotive force source for delivering magnetomotive force to the second return pole and the write pole. The first and second magnetomotive force sources can be operated independently of one another so that different relative amounts of magnetomotive force can be applied to the first and second return poles. A trailing magnetic shield can be connected with one of the return poles, such as the second return poles, and the variation in magnetomotive force can be used to increase the amount of flux flowing through the trailing shield when increased field gradient is desired (such as when writing a transition), and to decrease the amount of flux through the trailing shield when decreased field gradient and increased write field are desired (such as when writing a long magnetic section on a magnetic medium).
摘要翻译：用于垂直磁记录的写头，具有写极和第一和第二返回极。写头可以包括用于将磁动势传递到第一返回极和写极的第一磁动势源和用于将磁动势传递到第二返回极和写极的第二磁动势力源。第一和第二磁动势源可以彼此独立地操作，使得可以将不同的相对量的磁动势施加到第一和第二返回极。拖尾磁屏蔽可以与诸如第二返回极中的一个返回极连接，并且当需要增加磁场梯度时，可以使用磁动势的变化来增加流过后屏蔽的磁通量（例如当写入转换时），并且当需要减小的场梯度和增加的写入场（例如当在磁介质上写入长磁场时）时，减小通过后屏蔽的通量的量。

3. 发明授权

US07161763B2 GMR sensor with oriented hard bias stabilization 失效
标题翻译：具有定向硬偏置稳定的GMR传感器
公开(公告)号：US07161763B2
公开(公告)日：2007-01-09
申请号：US10782088
申请日：2004-02-18
申请人： Kuok San Ho , Prakash Kasiraj , Ernesto E. Marinero , James L. Nix
发明人： Kuok San Ho , Prakash Kasiraj , Ernesto E. Marinero , James L. Nix
IPC分类号： G11B17/02
CPC分类号： G11B5/3903
摘要： Magnetic data storage devices use read/write heads to transfer data between the magnetic storage medium and the rest of the system. The read head is constructed with a magnetic layer called a free layer whose magnetic axis rotates based upon external magnetic influences of the magnetic storage medium. The free layer is biased into a predetermined magnetic orientation with the magnetic influence of a layer called a hard bias layer. Orientation of magnetic axes within the hard bias layer is desired. This document describes a hard bias layer whose magnetization exhibits uniaxial magnetic anisotropy.
摘要翻译：磁数据存储设备使用读/写头在磁存储介质和系统的其余部分之间传送数据。读头由具有磁性层的磁性层构成，磁性层基于磁存储介质的外部磁影响而旋转。自由层被称为硬偏压层的层的磁影响而被偏压成预定的磁性取向。期望硬偏置层内的磁轴的取向。该文献描述了一种硬偏磁层，其磁化表现出单轴磁各向异性。

4. 发明授权

US06972935B2 Current-in-plane magnetoresistive sensor with longitudinal biasing layer having a nonmagnetic oxide central region and method for fabrication of the sensor 失效
公开(公告)号：US06972935B2
公开(公告)日：2005-12-06
申请号：US10917982
申请日：2004-08-13
申请人： Elizabeth A. Dobisz , Robert E. Fontana, Jr. , James L. Nix , Neil Smith
发明人： Elizabeth A. Dobisz , Robert E. Fontana, Jr. , James L. Nix , Neil Smith
IPC分类号： G01R33/09 , G11B5/012 , G11B5/31 , G11B5/39
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G11B5/012 , G11B5/3116 , G11B5/3903 , G11B5/3932 , G11B2005/3996 , Y10T29/49044
摘要： A current-in-the-plane (CIP) giant magnetoresistive (GMR) spin valve sensor has its free layer magnetization stabilized by longitudinal biasing through the use of free layer end-region antiferromagnetic exchange coupling. An antiparallel coupling (APC) layer, such as Ru, is formed on the free layer and a ferromagnetic bias layer is formed on the APC layer. The bias layer is a continuous layer that extends across the entire width of the free layer. The central region of the bias layer is formed of nonmagnetic oxides of one or more of the elements making up the bias layer, with the bias layer end regions remaining ferromagnetic. The oxidized central region of the bias layer defines the central active track-width region of the underlying free layer. The ferromagnetic end regions of the bias layer are antiferromagnetically coupled across the APC layer to the corresponding underlying free layer end regions to provide the longitudinal biasing.

5. 发明授权

US4967301A Shallow magnetic head shield for reducing feedthrough 失效
标题翻译：浅磁头屏蔽，用于减少馈通
公开(公告)号：US4967301A
公开(公告)日：1990-10-30
申请号：US520170
申请日：1990-05-09
申请人： Rudolph M. Lopez , James L. Nix , Robert E. Weinstein
发明人： Rudolph M. Lopez , James L. Nix , Robert E. Weinstein
IPC分类号： G11B5/11 , G11B5/265 , G11B5/29
CPC分类号： G11B5/29 , G11B5/112 , G11B5/265
摘要： A magnetic head is disclosed in which thin strips of shielding are inlaid into the surface of the magnetic head between the read and write gaps for reducing feedthrough. The shielding extends across a substantial portion of the tape-engaging surface between the read and write gaps. Further reduction of feedthrough is achieved by inlaying additional shielding outboard of the read gaps. The shielding does not encircle individual read or write gaps, but may extend across tracks in a multitrack head. The shielding is made of a magnetically permeable material which absorbs magnetic flux which otherwise strays from the magnetic cores. Material and manufacturing costs are maintained low because the shields are small and simple in geometry.
摘要翻译：公开了一种磁头，其中薄的屏蔽条被嵌入在读取和写入间隙之间的磁头的表面中，以减少馈通。屏蔽层延伸穿过读取和写入间隙之间的磁带接合表面的大部分。馈通的进一步减少是通过在读取间隙中嵌入额外的屏蔽外部来实现的。屏蔽不包围各个读或写间隙，但可以在多轨磁头中延伸穿过磁道。屏蔽由导磁材料制成，其吸收否则从磁芯流出的磁通量。材料和制造成本保持较低，因为屏蔽尺寸小而且几何形状简单。

6. 发明授权

US07791844B2 Magnetoresistive sensor having a magnetically stable free layer with a positive magnetostriction 有权
标题翻译：具有具有正磁致伸缩性的磁稳定自由层的磁阻传感器
公开(公告)号：US07791844B2
公开(公告)日：2010-09-07
申请号：US11737701
申请日：2007-04-19
申请人： Matthew Joseph Carey , Jeffrey Robinson Childress , Stefan Maat , James L. Nix
发明人： Matthew Joseph Carey , Jeffrey Robinson Childress , Stefan Maat , James L. Nix
IPC分类号： G11B5/39
CPC分类号： G11B5/3166 , G11B5/3163 , G11B5/3196 , G11B5/3932 , G11C11/14 , H01L43/12
摘要： A magnetoresistive sensor having a magnetically stable free layer fabricated from a material having a positive magnetostriction such as a Co—Fe—B alloy. Although the free layer is fabricated from a material that has a positive magnetostriction, which would ordinarily make the free layer unstable, the magnetization of the free layer remains stable because of an induced magnetic anisotropy that has an easy axis of magnetization oriented parallel to the Air-bearing Surface (ABS). This magnetic anisotropy of the free layer is induced by an anisotropic texturing of the surface of the free layer. The resulting anisotropic surface texture is produced by an ion milling process that utilizes an ion beam directed at an acute angle relative to the normal to the surface of the wafer whereon the sensor is fabricated while the wafer is held on a stationary chuck. This angled, static ion milling produces an anisotropic surface texture, or roughness, of the free layer, which results in the above described magnetic anisotropy with an easy axis of magnetization in a desired orientation.
摘要翻译：具有由具有正磁致伸缩性的材料制成的磁稳定自由层的磁阻传感器，例如Co-Fe-B合金。尽管自由层由具有正磁致伸缩的材料制成，这通常会使自由层不稳定，但是由于具有易磁化轴平行于空气的诱导磁各向异性，自由层的磁化保持稳定（ABS）。自由层的磁各向异性由自由层表面的各向异性纹理引发。产生的各向异性表面纹理是通过离子研磨工艺产生的，该离子铣削工艺利用相对于晶片表面法线的锐角定向的离子束，其中制造传感器，同时将晶片保持在静止卡盘上。这种成角度的静态离子铣削产生自由层的各向异性表面纹理或粗糙度，这导致上述磁各向异性，并且在所需方向上具有容易的磁化轴。

7. 发明授权

US07558019B2 Perpendicular magnetic recording write head with flux-conductor contacting write pole 失效
标题翻译：垂直磁记录写磁头与磁通导体接触写极
公开(公告)号：US07558019B2
公开(公告)日：2009-07-07
申请号：US11560761
申请日：2006-11-16
申请人： Quang Le , James L. Nix , Neil Leslie Robertson , Neil Smith , Petrus Antonius VanDerHeijden
发明人： Quang Le , James L. Nix , Neil Leslie Robertson , Neil Smith , Petrus Antonius VanDerHeijden
IPC分类号： G11B5/10 , G11B5/127
CPC分类号： G11B5/1278 , G11B5/11 , G11B5/3116 , G11B5/3146 , G11B5/315
摘要： A perpendicular magnetic recording write head has a flux conductor in contact with the write pole. The flux conductor is substantially wider than the write pole tip in the cross-track direction and has a blunt end that is recessed from the pole tip end. The region of the flux conductor where its blunt end is in contact with the pole tip is the “choke” point for the write pole, i.e., the point where the flux density is highest. The flux conductor enables the write pole to be made with no flare, or with a flare angle and throat height with a much wider tolerance, which substantially simplifies the manufacturing process. The write head may have a trailing shield and side shields that substantially surround the write pole tip and remove stray fields that may be produced by the flux conductor, so that regions of the recording layer other than the track being written are not adversely affected.
摘要翻译：垂直磁记录写头具有与写极接触的磁通导体。磁通导体在横向磁道方向上基本上比写入磁极尖端更宽，并且具有从磁极末端凹进的钝端。其钝端与极尖接触的磁通导体的区域是写极的“扼流”点，即磁通密度最高的点。磁通导体使写磁极能够制成没有耀斑，或具有更宽公差的喇叭角和喉部高度，这大大简化了制造过程。写头可以具有基本上围绕写磁极尖端的后屏蔽和侧屏蔽，并且去除可能由磁通导体产生的杂散场，使得除了正在写入的磁道之外的记录层的区域不受不利影响。

8. 发明授权

US07268985B2 Magnetic head having a layered hard bias layer exhibiting reduced noise 失效
标题翻译：具有分层硬偏置层的磁头具有降低的噪声
公开(公告)号：US07268985B2
公开(公告)日：2007-09-11
申请号：US10856710
申请日：2004-05-28
申请人： James Mac Freitag , James L. Nix , Mustafa Michael Pinarbasi
发明人： James Mac Freitag , James L. Nix , Mustafa Michael Pinarbasi
IPC分类号： G11B5/39 , G11B5/33
CPC分类号： G11B5/3932 , B82Y25/00 , G01R33/093
摘要： A magnetic head having an improved read head structure. The read head includes a free magnetic layer with hard bias elements disposed proximate its ends, where the hard bias elements include an improved hard bias magnetic grain structure. This is accomplished by fabricating the hard bias element as a bilayer structure having a first hard bias sublayer, a nonmagnetic midlayer and a second hard bias sublayer. The midlayer is preferably composed of a nonmagnetic material such as chromium, and the hard bias sublayers are composed of a magnetic material such as CoPtCr. Each sublayer is formed with its own magnetic grains, and because there are two sublayers, the hard bias element is fabricated with approximately twice the number of magnetic grains as the prior art single layer hard bias element.
摘要翻译：具有改进的读头结构的磁头。读头包括具有靠近其端部设置的硬偏置元件的自由磁性层，其中硬偏置元件包括改进的硬偏磁晶粒结构。这是通过将硬偏压元件制造成具有第一硬偏压子层，非磁性中间层和第二硬偏压子层的双层结构来实现的。中间层优选由诸如铬的非磁性材料构成，并且硬偏置子层由诸如CoPtCr的磁性材料构成。每个子层由其自身的磁性颗粒形成，并且由于存在两个子层，所以用现有技术的单层硬偏置元件的大约两倍的磁性颗粒制造硬偏置元件。

9. 发明授权

US07978430B2 Apparatus for providing a reverse air bearing surface head with trailing shield design for perpendicular recording 有权
标题翻译：用于提供具有用于垂直记录的后挡板设计的反向空气轴承表面头的装置
公开(公告)号：US07978430B2
公开(公告)日：2011-07-12
申请号：US11852166
申请日：2007-09-07
申请人： Quang Le , James L. Nix , Aron Pentek , Walter E. Weresin , Mason L. Williams
发明人： Quang Le , James L. Nix , Aron Pentek , Walter E. Weresin , Mason L. Williams
IPC分类号： G11B5/127 , G11B5/147
CPC分类号： G11B5/1278 , Y10T29/49039 , Y10T29/49043 , Y10T29/49046 , Y10T29/49048 , Y10T29/49052
摘要： A method and apparatus for providing a reverse air bearing surface head with trailing shield design for perpendicular recording. A reverse air bearing surface head for perpendicular recording is provided with an inversed bevel shape to handle skew when recording data on a magnetic recording medium.
摘要翻译：一种用于提供具有用于垂直记录的后挡板设计的反向空气轴承表面头的方法和装置。用于垂直记录的反向空气轴承表面头设置有反转的斜面形状，以在磁记录介质上记录数据时处理偏斜。

10. 发明授权

US06778364B2 Current-in-plane magnetoresistive sensor with longitudinal biasing layer having a nonmagnetic oxide central region and method for fabrication of the sensor 失效
标题翻译：具有具有非磁性氧化物中心区域的纵向偏置层的电流平面内磁阻传感器和用于制造传感器的方法
公开(公告)号：US06778364B2
公开(公告)日：2004-08-17
申请号：US10230903
申请日：2002-08-28
申请人： Elizabeth A. Dobisz , Robert E. Fontana, Jr. , James L. Nix , Neil Smith
发明人： Elizabeth A. Dobisz , Robert E. Fontana, Jr. , James L. Nix , Neil Smith
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G11B5/012 , G11B5/3116 , G11B5/3903 , G11B5/3932 , G11B2005/3996 , Y10T29/49044
摘要： A current-in-the-plane (CIP) giant magnetoresistive (GMR) spin valve sensor has its free layer magnetization stabilized by longitudinal biasing through the use of free layer end-region antiferromagnetic exchange coupling. An antiparallel coupling (APC) layer, such as Ru, is formed on the free layer and a ferromagnetic bias layer is formed on the APC layer. The bias layer is a continuous layer that extends across the entire width of the free layer. The central region of the bias layer is formed of nonmagnetic oxides of one or more of the elements making up the bias layer, with the bias layer end regions remaining ferromagnetic. The oxidized central region of the bias layer defines the central active trackwidth region of the underlying free layer. The ferromagnetic end regions of the bias layer are antiferromagnetically coupled across the APC layer to the corresponding underlying free layer end regions to provide the longitudinal biasing.
摘要翻译：电流平面（CIP）巨磁阻（GMR）自旋阀传感器通过使用自由层末端反铁磁交换耦合的纵向偏置使其自由层磁化稳定。在自由层上形成诸如Ru的反平行耦合（APC）层，并且在APC层上形成铁磁偏置层。偏置层是在自由层的整个宽度上延伸的连续层。偏置层的中心区域由构成偏置层的一个或多个元件的非磁性氧化物形成，偏置层端部区域保持铁磁性。偏置层的氧化中心区域定义了下层自由层的中心主动轨道宽度区域。偏置层的铁磁端区域跨越APC层反铁磁耦合到相应的下游自由层端部区域以提供纵向偏置。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式