公开(公告)号：US20050190478A1

公开(公告)日：2005-09-01

申请号：US10791431

申请日：2004-03-01

申请人： Wenchien Hsiao ,  Vladimir Nikitin ,  Adam Polcyn

发明人： Wenchien Hsiao ,  Vladimir Nikitin ,  Adam Polcyn

IPC分类号： G11B5/00 ,  G11B5/02 ,  G11B5/64 ,  G11B5/73 ,  G11B5/82

CPC分类号： G11B5/667 ,  G11B5/02 ,  G11B5/64 ,  G11B5/82 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/001

摘要： A method of longitudinal recording using a medium with a magnetically soft underlayer is described. The method includes lowering the longitudinal coercivity in a magnetic domain in the magnetic recording medium by generating a vertical component of magnetic flux in the magnetic recording medium and writing a longitudinal orientation in the magnetic domain in the magnetic recording medium by generating a larger horizontal component of magnetic flux in the magnetic recording medium using the write head. Optionally the method further includes magnetically saturating the magnetically soft underlayer after lowering the longitudinal coercivity to limit the vertical component of the magnetic flux. The recording medium has a magnetic recording layer, a spacer layer and a soft underlayer. In one embodiment the soft underlayer is an antiferromagnetically coupled magnetic layer stack with two soft magnetic layers separated by a non-magnetic spacer layer selected to achieve the antiferromagnetic coupling.

摘要翻译： 描述使用具有磁软底层的介质进行纵向记录的方法。 该方法包括通过在磁记录介质中产生磁通量的垂直分量来降低磁记录介质中的磁畴中的纵向矫顽力，并通过产生较大的水平分量来形成磁记录介质中的磁畴中的纵向取向 使用写入磁头的磁记录介质中的磁通量。 可选地，该方法还包括在降低纵向矫顽力之后使磁软底层磁饱和，以限制磁通的垂直分量。 记录介质具有磁记录层，间隔层和软底层。 在一个实施例中，软底层是反铁磁耦合磁层，其中两个软磁层由被选择用于实现反铁磁耦合的非磁性间隔层隔开。

公开(公告)号：US20050047014A1

公开(公告)日：2005-03-03

申请号：US10652877

申请日：2003-08-29

申请人： Daniel Bedell ,  Quang Le ,  Edward Lee ,  Son Nguyen ,  Vladimir Nikitin ,  Murali Ramasubramanian

发明人： Daniel Bedell ,  Quang Le ,  Edward Lee ,  Son Nguyen ,  Vladimir Nikitin ,  Murali Ramasubramanian

IPC分类号： G11B5/127 ,  G11B5/147

CPC分类号： G11B5/127

摘要： An apparatus for patterning a self-aligned coil using a damascene process is disclosed. Coil pockets are formed in a first insulation layer disposed over a first pole layer. A barrier/seed layer is deposited along walls of the coil pockets in the insulation layer. Copper is formed in the coil pockets and over the insulation layer. The copper is planarized down to the insulation layer. The self-aligned coil process packs more copper into the same coil pocket and relaxes the coil alignment tolerance. Protrusions are prevented because of the more efficient and uniform spacing of the coil to reduce heat buildup in the head during a write.

摘要翻译： 公开了一种使用镶嵌工艺图案化自对准线圈的装置。 在设置在第一极层上的第一绝缘层中形成线圈腔。 隔离层/籽晶层沿绝缘层中的线圈袋的壁被沉积。 在线圈袋中形成铜，并在绝缘层上形成铜。 铜平坦化到绝缘层。 自对准线圈工艺将更多的铜包装到相同的线圈袋中，并松弛线圈对准公差。 由于在写入期间线圈的间隔更加有效和均匀以减少头部的积聚，所以防止了突起。

公开(公告)号：US06793961B2

公开(公告)日：2004-09-21

申请号：US10717385

申请日：2003-11-19

申请人： Vladimir Nikitin ,  Jeffrey Gregory McCord ,  Murali Ramasubramanian

发明人： Vladimir Nikitin ,  Jeffrey Gregory McCord ,  Murali Ramasubramanian

IPC分类号： B05D512

CPC分类号： H01F41/34 ,  G11B5/3113 ,  G11B5/313 ,  G11B5/3143 ,  G11B5/8404 ,  H01F41/32

摘要： A method for fabricating a soft ferromagnetic film structure with reduced edge stress anisotropy and enhanced magnetization switching speed. A soft ferromagnetic film structure is formed over an underlying structure. The soft ferromagnetic film structure has one or more edges exhibiting edge stress anisotropy. A non-ferromagnetic film structure is formed along the one or more edges to induce stress contributions therein that control the edge stress anisotropy.

摘要翻译： 一种制造具有降低的边缘应力各向异性和增强的磁化转换速度的软铁磁膜结构的方法。 在下面的结构上形成软铁磁膜结构。 软铁磁膜结构具有一个或多个边缘表现出边缘应力各向异性。 沿着一个或多个边缘形成非铁磁膜结构以在其中引起其中控制边缘应力各向异性的应力贡献。

公开(公告)号：US06791868B2

公开(公告)日：2004-09-14

申请号：US10335671

申请日：2003-01-02

申请人： Savas Gider ,  Vladimir Nikitin

发明人： Savas Gider ,  Vladimir Nikitin

IPC分类号： G11C1100

CPC分类号： G11C11/16

摘要： A new method of performing the write operation on the MRAM bit cell with improved switching selectivity and lower write current requirements is achieved utilizing oscillating word write currents at frequency near the ferromagnetic resonance frequency of the free layer, combined with the shift in said frequency due to the magnetic field produced by the current in the bit line. Operation is implemented in a conventional magnetic random access memory having a plurality of magnetoresisitive cells formed by an intersection of a grid of word and bit lines, wherein an individual cell within the grid can be selected and switched from one magnetic state to another by the magnetic fields produced by the currents in the word and bit lines.

摘要翻译： 利用具有改善的开关选择性和较低写入电流要求的MRAM位单元执行写入操作的新方法利用在自由层的铁磁共振频率附近的频率处的振荡字写入电流来实现，结合由于 由位线中的电流产生的磁场。 操作在具有由字和位线的交叉点的交叉形成的多个磁感应电池的常规磁随机存取存储器中实现，其中电网内的单个电池可以通过磁性被选择并从一个磁状态切换到另一个磁状态 由字和位线中的电流产生的场。

公开(公告)号：US06678125B2

公开(公告)日：2004-01-13

申请号：US10044513

申请日：2002-01-11

申请人： Vladimir Nikitin ,  Jeffrey Gregory McCord ,  Murali Ramasubramanian

发明人： Vladimir Nikitin ,  Jeffrey Gregory McCord ,  Murali Ramasubramanian

IPC分类号： G11B531

CPC分类号： H01F41/34 ,  G11B5/3113 ,  G11B5/313 ,  G11B5/3143 ,  G11B5/8404 ,  H01F41/32

摘要： A method for fabricating a soft ferromagnetic film structure with reduced edge stress anisotropy and enhanced magnetization switching speed. A soft ferromagnetic film structure is formed over an underlying structure. The soft ferromagnetic film structure has one or more edges exhibiting edge stress anisotropy. A non-ferromagnetic film structure is formed along the one or more edges to induce stress contributions therein that control the edge stress anisotropy.

公开(公告)号：US20140151830A1

公开(公告)日：2014-06-05

申请号：US13691873

申请日：2012-12-03

申请人： Dmytro Apalkov ,  Vladimir Nikitin ,  Mohamad Towfik Krounbi

发明人： Dmytro Apalkov ,  Vladimir Nikitin ,  Mohamad Towfik Krounbi

IPC分类号： H01L29/82 ,  H01L29/66

CPC分类号： H01L27/222 ,  G11C11/161 ,  G11C11/1675 ,  G11C11/5607 ,  H01L43/08 ,  H01L43/12

摘要： A method and system provide a magnetic junction usable in a magnetic device. The magnetic junction includes a pinned layer, a nonmagnetic spacer layer, and a free layer. The nonmagnetic spacer layer is between the pinned layer and the free layer. The free layer has a gradient in a critical switching current density (Jc0) such that a first Jc0 of a first portion of the free layer is lower than a second Jc0 of a second portion of the free layer. The second portion of the free layer is further from the nonmagnetic spacer layer than the first portion is. The magnetic junction is configured such that the free layer is switchable between a plurality of stable magnetic states when a write current is passed through the magnetic junction.

摘要翻译： 一种方法和系统提供可用于磁性装置的磁结。 磁结包括钉扎层，非磁性间隔层和自由层。 非磁性间隔层位于被钉扎层和自由层之间。 自由层具有临界开关电流密度（Jc0）的梯度，使得自由层的第一部分的第一Jc0低于自由层的第二部分的第二部分Jc0。 自由层的第二部分比第一部分更远离非磁性间隔层。 磁结被配置为使得当写入电流通过磁结时，自由层可在多个稳定磁状态之间切换。

公开(公告)号：US08553361B2

公开(公告)日：2013-10-08

申请号：US12109940

申请日：2008-04-25

申请人： Wen-Chien David Hsiao ,  Vladimir Nikitin

发明人： Wen-Chien David Hsiao ,  Vladimir Nikitin

IPC分类号： G11B5/17

CPC分类号： G11B5/3146 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/1872 ,  G11B5/232 ,  G11B5/3116

摘要： A magnetic write head having a trailing shield configured to optimize both write field strength and field gradient. The write head includes a write pole, a trailing gap layer formed over the trailing edge of the write pole and a trailing magnetic shield formed over the non-magnetic write gap layer such that the non-magnetic write gap layer is sandwiched between the trailing magnetic shield and the write pole. The trailing magnetic shield has a first surface disposed at the air bearing surface and second surface disposed away from the air bearing surface that is tapered at an angle of 20 to 75 degrees relative to the trailing edge of the write pole.

摘要翻译： 具有后挡板的磁写头，其被配置为优化写场强度和场梯度。 写头包括形成在写磁极的后缘上的写磁极，后间隙层和形成在非磁写入间隙层上的后磁屏蔽，使得非磁写写间隙层夹在后磁 屏蔽和写柱。 尾部磁屏蔽件具有设置在空气轴承表面处的第一表面和远离空气轴承表面设置的第二表面，该第一表面相对于写入柱的后缘以20度至75度的角度渐缩。

公开(公告)号：US08503131B2

公开(公告)日：2013-08-06

申请号：US13339310

申请日：2011-12-28

申请人： Yi Zheng ,  Yimin Hsu ,  Wen-Chien David Hsiao ,  Ming Jiang ,  Aron Pentek ,  Sue Siyang Zhang ,  Edward Hin Pong Lee ,  Hung-chin Guthrie ,  Ning Shi ,  Vladimir Nikitin ,  Prabodh Ratnaparkhi ,  Yinshi Liu

发明人： Yi Zheng ,  Yimin Hsu ,  Wen-Chien David Hsiao ,  Ming Jiang ,  Aron Pentek ,  Sue Siyang Zhang ,  Edward Hin Pong Lee ,  Hung-chin Guthrie ,  Ning Shi ,  Vladimir Nikitin ,  Prabodh Ratnaparkhi ,  Yinshi Liu

IPC分类号： G11B5/147

CPC分类号： G11B5/3166 ,  G11B5/112 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/3146 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052 ,  Y10T428/11 ,  Y10T428/1186

摘要： A magnetic write head for perpendicular magnetic data recording. The write head includes a substrate and a magnetic write pole formed on the substrate, the write pole having a trailing edge and first and second sides. A magnetic stitched pole is formed over a portion of the magnetic write pole, the stitched pole having a front edge that defines a secondary flare point. First and second non-magnetic side walls are formed at the first and second sides of the write pole. The non-magnetic side walls extend from the substrate at least to the trailing edge of the write pole in a first region near an air bearing surface and wherein the first and second non-magnetic side walls extend from the substrate to a point between the substrate and the trailing edge, allowing the stitched magnetic pole to extend partially over the sides of the write pole.

摘要翻译： 用于垂直磁数据记录的磁写头。 写入头包括形成在衬底上的衬底和磁性写入磁极，写入极具有后缘和第一和第二侧。 在磁性写入磁极的一部分上形成有磁性的缝合磁极，缝合的磁极具有限定二次闪光点的前部边缘。 第一和第二非磁性侧壁形成在写入极的第一和第二侧。 所述非磁性侧壁在靠近空气支承表面的第一区域中从所述基板至少延伸到所述写柱的后缘，并且其中所述第一和第二非磁性侧壁从所述基板延伸到所述基板之间的点 和后缘，允许缝合的磁极部分地延伸在写柱的侧面上。

公开(公告)号：US20120319221A1

公开(公告)日：2012-12-20

申请号：US13495830

申请日：2012-06-13

申请人： Dmytro Apalkov ,  Xueti Tang ,  Mohamad Towfik Krounbi ,  Vladimir Nikitin

发明人： Dmytro Apalkov ,  Xueti Tang ,  Mohamad Towfik Krounbi ,  Vladimir Nikitin

IPC分类号： H01L27/22 ,  H01L43/12 ,  H01L43/02

CPC分类号： H01L43/08 ,  G11C11/161 ,  H01L27/228

摘要： A method and system provide a magnetic junction usable in a magnetic device. The magnetic junction includes a first pinned layer having a first pinned layer magnetization, a first nonmagnetic spacer layer, and a free layer having an easy axis. The first nonmagnetic spacer layer is between the first pinned layer and the free layer. The magnetic junction is configured such that the free layer is switchable between a plurality of stable magnetic states when a write current is passed through the magnetic junction and such that the free layer employs precessional switching.

摘要翻译： 一种方法和系统提供可用于磁性装置的磁结。 磁结包括具有第一固定层磁化的第一被钉扎层，第一非磁性间隔层和具有易轴的自由层。 第一非磁性间隔层位于第一被钉扎层和自由层之间。 磁结被配置为使得当写入电流通过磁结并且使得自由层采用进动切换时，自由层可在多个稳定磁状态之间切换。

公开(公告)号：US20120261776A1

公开(公告)日：2012-10-18

申请号：US13332328

申请日：2011-12-20

申请人： Xueti Tang ,  Vladimir Nikitin ,  Dmytro Apalkov ,  Kiseok Moon ,  Steven M. Watts

发明人： Xueti Tang ,  Vladimir Nikitin ,  Dmytro Apalkov ,  Kiseok Moon ,  Steven M. Watts

IPC分类号： H01L29/82 ,  H01L21/18

CPC分类号： H01L43/08 ,  G11C11/161 ,  G11C11/1675

摘要： A method and system provide a magnetic junction usable in a magnetic device. The magnetic junction includes a pinned layer, a nonmagnetic spacer layer, a free layer, and at least one damping reduction layer. The free layer has an intrinsic damping constant. The nonmagnetic spacer layer is between the pinned layer and the free layer. The at least one damping reduction layer is adjacent to at least a portion of the free layer and configured to reduce the intrinsic damping constant of the free layer. The magnetic junction is configured such that the free layer is switchable between a plurality of stable magnetic states when a write current is passed through the magnetic junction.

摘要翻译： 一种方法和系统提供可用于磁性装置的磁结。 磁结包括钉扎层，非磁性间隔层，自由层和至少一个阻尼减小层。 自由层具有固有阻尼常数。 非磁性间隔层位于被钉扎层和自由层之间。 所述至少一个阻尼减小层与所述自由层的至少一部分相邻并且被配置为减小所述自由层的固有阻尼常数。 磁结被配置为使得当写入电流通过磁结时，自由层可在多个稳定磁状态之间切换。