公开(公告)号：US08023218B2

公开(公告)日：2011-09-20

申请号：US12313796

申请日：2008-11-25

申请人： Yuchen Zhou ,  Kowang Liu ,  Kunliang Zhang ,  Erhard Schreck

发明人： Yuchen Zhou ,  Kowang Liu ,  Kunliang Zhang ,  Erhard Schreck

IPC分类号： G11B5/02

CPC分类号： G11B5/1278 ,  G11B2005/001

摘要： We describe a system for electric field assisted magnetic recording where a recordable magnetic medium includes a magnetic recording layer of high coercivity and vertical magnetic anisotropy that is adjacent to an electrostrictive layer which can be placed in a state of stress by a electric field or which is already pre-stressed and which pre-stress can be turned into strain by an electric field. When the magnetic medium is acted on simultaneously by a magnetic writing field and an electric field, the stress in the electrostrictive layer is transferred to a magnetostrictive layer which is the magnetic recording layer by itself or is coupled to the magnetic recording layer, whereupon the magnetic recording layer is made more isotropic and more easily written upon. Residual stresses in the electrostrictive layer can then be removed by an additional electric field of opposite sign to the stress-producing field.

摘要翻译： 我们描述了一种用于电场辅助磁记录的系统，其中可记录磁介质包括与矫顽力层相邻的具有高矫顽力和垂直磁各向异性的磁记录层，该电致伸缩层可通过电场置于应力状态， 已经预应力，哪些预应力可以通过电场变成应变。 当磁介质由磁场和电场同时作用时，电致伸缩层中的应力自身转移到作为磁记录层的磁致伸缩层，或耦合到磁记录层，由此磁性 记录层变得更加各向同性，更容易写入。 电致伸缩层中的残余应力然后可以通过与应力产生场相反的附加电场来去除。

公开(公告)号：US20100128377A1

公开(公告)日：2010-05-27

申请号：US12313796

申请日：2008-11-25

申请人： Yuchen Zhou ,  Kowang Liu ,  Kunliang Zhang ,  Erhard Schreck

发明人： Yuchen Zhou ,  Kowang Liu ,  Kunliang Zhang ,  Erhard Schreck

IPC分类号： G11B5/02 ,  G11B5/82

CPC分类号： G11B5/1278 ,  G11B2005/001

摘要： We describe a system for electric field assisted magnetic recording where a recordable magnetic medium includes a magnetic recording layer of high coercivity and vertical magnetic anisotropy that is adjacent to an electrostrictive layer which can be placed in a state of stress by a electric field or which is already pre-stressed and which pre-stress can be turned into strain by an electric field. When the magnetic medium is acted on simultaneously by a magnetic writing field and an electric field, the stress in the elctrostrictive layer is transferred to a magnetostrictive layer which is the magnetic recording layer by itself or is coupled to the magnetic recording layer, whereupon the magnetic recording layer is made more isotropic and more easily written upon. Residual stresses in the electrostrictive layer can then be removed by an additional electric field of opposite sign to the stress-producing field.

摘要翻译： 我们描述了一种用于电场辅助磁记录的系统，其中可记录磁介质包括与矫顽力层相邻的具有高矫顽力和垂直磁各向异性的磁记录层，该电致伸缩层可通过电场置于应力状态， 已经预应力，哪些预应力可以通过电场变成应变。 当磁介质通过磁场和电场同时作用时，电致伸缩层中的应力自身转移到作为磁记录层的磁致伸缩层，或耦合到磁记录层，由此磁性 记录层变得更加各向同性，更容易写入。 电致伸缩层中的残余应力然后可以通过与应力产生场相反的附加电场来去除。

公开(公告)号：US20090141406A1

公开(公告)日：2009-06-04

申请号：US11987786

申请日：2007-12-04

申请人： Yoshitaka Sasaki ,  Hiroyuki Itoh ,  Hironori Araki ,  Takehiro Horinaka ,  Kowang Liu ,  Erhard Schreck

发明人： Yoshitaka Sasaki ,  Hiroyuki Itoh ,  Hironori Araki ,  Takehiro Horinaka ,  Kowang Liu ,  Erhard Schreck

IPC分类号： G11B5/33

CPC分类号： G11B5/1278 ,  G11B5/112 ,  G11B5/3116 ,  G11B5/3136 ,  G11B5/3146 ,  G11B5/315 ,  G11B5/3163

摘要： A magnetic head includes a pole layer and a shield. The shield includes a shield layer having a front end face located in the medium facing surface at a position forward of an end face of the pole layer along a direction of travel of the recording medium. The magnetic head further includes a stopper layer for suppressing protrusion of the front end face of the shield layer, the stopper layer being disposed adjacent to the shield layer and made of a nonmagnetic material having a linear thermal expansion coefficient of 5×10−6/° C. or smaller at a temperature of 25° C. to 100° C.

摘要翻译： 磁头包括极层和屏蔽。 屏蔽层包括屏蔽层，该屏蔽层具有前端面，该前端面沿着记录介质的行进方向位于磁极层的端面的前方的位置处于介质相对表面。 磁头还包括用于抑制屏蔽层前端面的突起的阻挡层，该阻挡层邻近屏蔽层设置并由线性热膨胀系数为5×10 -6 /℃的非磁性材料制成 在25℃至100℃的温度下

公开(公告)号：US08593915B2

公开(公告)日：2013-11-26

申请号：US13136462

申请日：2011-08-01

申请人： Erhard Schreck ,  Kowang Liu ,  Kouji Shimazawa ,  Po-Kang Wang

发明人： Erhard Schreck ,  Kowang Liu ,  Kouji Shimazawa ,  Po-Kang Wang

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/001 ,  G11B2005/0021

摘要： A slider mounted TAMR (Thermal Assisted Magnetic Recording), DFH (Dynamic Flying Height) type read/write head using optical-laser generated surface plasmons in a small antenna to locally heat a magnetic medium, uses the same optical laser at low power to pre-heat the antenna. Maintaining the antenna at this pre-heated temperature, approximately 50% of its highest temperature during write operations, allows the DFH mechanism sufficient time to compensate for the thermal protrusion of the antenna at that lower temperature, so that thermal protrusion transients are significantly reduced when a writing operation occurs and full laser power is applied. The time constant for antenna protrusion is less than the time constant for DFH fly height compensation, so, without pre-heating, the thermal protrusion of the antenna due to absorption of optical radiation cannot be compensated by the DFH effect.

摘要翻译： 使用在小天线中使用光学激光产生的表面等离子体激光器来局部加热磁介质的TAMR（热辅助磁记录），DFH（动态飞行高度）型读/写头的滑块，以低功率使用相同的光学激光器 - 加热天线。 将天线维持在该预热温度下，在写入操作期间其最高温度的约50％允许DFH机构有足够的时间来补偿在该较低温度下的天线的热突起，使得热突起瞬变显着降低 发生写入操作并施加全激光功率。 天线突起的时间常数小于DFH飞行高度补偿的时间常数，因此，在没有预热的情况下，由于吸收光辐射而导致的天线热突起不能被DFH效应补偿。

公开(公告)号：US20110292773A1

公开(公告)日：2011-12-01

申请号：US13136462

申请日：2011-08-01

申请人： Erhard Schreck ,  Kowang Liu ,  Kouji Shimazawa ,  Po-Kang Wang

发明人： Erhard Schreck ,  Kowang Liu ,  Kouji Shimazawa ,  Po-Kang Wang

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/001 ,  G11B2005/0021

摘要： A slider mounted TAMR (Thermal Assisted Magnetic Recording), DFH (Dynamic Flying Height) type read/write head using optical-laser generated surface plasmons in a small antenna to locally heat a magnetic medium, uses the same optical laser at low power to pre-heat the antenna. Maintaining the antenna at this pre-heated temperature, approximately 50% of its highest temperature during write operations, allows the DFH mechanism sufficient time to compensate for the thermal protrusion of the antenna at that lower temperature, so that thermal protrusion transients are significantly reduced when a writing operation occurs and full laser power is applied. The time constant for antenna protrusion is less than the time constant for DFH fly height compensation, so, without pre-heating, the thermal protrusion of the antenna due to absorption of optical radiation cannot be compensated by the DFH effect.

公开(公告)号：US07995425B2

公开(公告)日：2011-08-09

申请号：US12381327

申请日：2009-03-11

申请人： Erhard Schreck ,  Kowang Liu ,  Kouji Shimazawa ,  Po-Kang Wang

发明人： Erhard Schreck ,  Kowang Liu ,  Kouji Shimazawa ,  Po-Kang Wang

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/001 ,  G11B2005/0021

摘要： A slider mounted TAMR (Thermal Assisted Magnetic Recording), DFH (Dynamic Flying Height) type read/write head using optical-laser generated surface plasmons in a small antenna to locally heat a magnetic medium, uses the same optical laser at low power to pre-heat the antenna. Maintaining the antenna at this pre-heated temperature, approximately 50% of its highest temperature during write operations, allows the DFH mechanism sufficient time to compensate for the thermal protrusion of the antenna at that lower temperature, so that thermal protrusion transients are significantly reduced when a writing operation occurs and full laser power is applied. The time constant for antenna protrusion is less than the time constant for DFH fly height compensation, so, without pre-heating, the thermal protrusion of the antenna due to absorption of optical radiation cannot be compensated by the DFH effect.

摘要翻译： 使用在小天线中使用光学激光产生的表面等离子体激光器来局部加热磁介质的TAMR（热辅助磁记录），DFH（动态飞行高度）型读/写头的滑块，以低功率使用相同的光学激光器 - 加热天线。 将天线维持在该预热温度下，在写入操作期间其最高温度的约50％允许DFH机构有足够的时间来补偿在该较低温度下的天线的热突起，使得热突起瞬变显着降低 发生写入操作并施加全激光功率。 天线突起的时间常数小于DFH飞行高度补偿的时间常数，因此，在没有预热的情况下，由于吸收光辐射而导致的天线热突起不能被DFH效应补偿。

公开(公告)号：US07933095B2

公开(公告)日：2011-04-26

申请号：US11987786

申请日：2007-12-04

申请人： Yoshitaka Sasaki ,  Hiroyuki Itoh ,  Hironori Araki ,  Takehiro Horinaka ,  Kowang Liu ,  Erhard Schreck

发明人： Yoshitaka Sasaki ,  Hiroyuki Itoh ,  Hironori Araki ,  Takehiro Horinaka ,  Kowang Liu ,  Erhard Schreck

IPC分类号： G11B5/33 ,  G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/112 ,  G11B5/3116 ,  G11B5/3136 ,  G11B5/3146 ,  G11B5/315 ,  G11B5/3163

摘要： A magnetic head includes a pole layer and a shield. The shield includes a shield layer having a front end face located in the medium facing surface at a position forward of an end face of the pole layer along a direction of travel of the recording medium. The magnetic head further includes a stopper layer for suppressing protrusion of the front end face of the shield layer, the stopper layer being disposed adjacent to the shield layer and made of a nonmagnetic material having a linear thermal expansion coefficient of 5×10−6/° C. or smaller at a temperature of 25° C. to 100° C.

摘要翻译： 磁头包括极层和屏蔽。 屏蔽层包括屏蔽层，该屏蔽层具有前端面，该前端面沿着记录介质的行进方向位于磁极层的端面的前方的位置处于介质相对表面。 磁头还包括用于抑制屏蔽层的前端面的突出的阻挡层，该阻挡层与屏蔽层相邻设置，并且由线性热膨胀系数为5×10 -6 / 在25℃至100℃的温度下，

公开(公告)号：US20100232050A1

公开(公告)日：2010-09-16

申请号：US12381327

申请日：2009-03-11

申请人： Erhard Schreck ,  Kowang Liu ,  Kouji Shimazawa ,  Po-Kang Wang

发明人： Erhard Schreck ,  Kowang Liu ,  Kouji Shimazawa ,  Po-Kang Wang

IPC分类号： G11B5/02

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/001 ,  G11B2005/0021

摘要： A slider mounted TAMR (Thermal Assisted Magnetic Recording), DFH (Dynamic Flying Height) type read/write head using optical-laser generated surface plasmons in a small antenna to locally heat a magnetic medium, uses the same optical laser at low power to pre-heat the antenna. Maintaining the antenna at this pre-heated temperature, approximately 50% of its highest temperature during write operations, allows the DFH mechanism sufficient time to compensate for the thermal protrusion of the antenna at that lower temperature, so that thermal protrusion transients are significantly reduced when a writing operation occurs and full laser power is applied. The time constant for antenna protrusion is less than the time constant for DFH fly height compensation, so, without pre-heating, the thermal protrusion of the antenna due to absorption of optical radiation cannot be compensated by the DFH effect.

摘要翻译： 使用在小天线中使用光学激光产生的表面等离子体激光器来局部加热磁介质的TAMR（热辅助磁记录），DFH（动态飞行高度）型读/写头的滑块，以低功率使用相同的光学激光器 - 加热天线。 将天线维持在该预热温度下，在写入操作期间其最高温度的约50％允许DFH机构有足够的时间来补偿在该较低温度下的天线的热突起，使得热突起瞬变显着降低 发生写入操作并施加全激光功率。 天线突起的时间常数小于DFH飞行高度补偿的时间常数，因此，在没有预热的情况下，由于吸收光辐射而导致的天线热突起不能被DFH效应补偿。

公开(公告)号：US08094418B2

公开(公告)日：2012-01-10

申请号：US12080276

申请日：2008-04-02

申请人： Erhard Schreck ,  Kowang Liu

发明人： Erhard Schreck ,  Kowang Liu

IPC分类号： G11B5/39 ,  G11B5/56

CPC分类号： G11B5/1278 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3116 ,  G11B5/3136 ,  G11B5/3909 ,  G11B5/3912 ,  G11B5/3967 ,  G11B5/6064

摘要： A vertically stacked DFH design in a read/write head is disclosed that allows independent control of write gap protrusion and read gap protrusion. A first heater is formed in an insulation layer proximate to a sensor in a read head. A second heater is formed in a second insulation layer proximate to the write pole tip in a main pole layer. The two heaters are connected in series or in parallel through leads to a power source that activates the heaters. In one embodiment, the heaters have a fixed resistance ratio. Preferably, there are two drivers in the power source so that a first power can be applied to the first heater and a second power can be applied to the second heater to enable an adjustment of reader protrusion/writer protrusion or gamma ratio. Fast reader and writer actuation is achieved and low power consumption is realized.

摘要翻译： 公开了一种读/写头中的垂直堆叠DFH设计，其允许对间隙突出和读取间隙突出的独立控制。 第一加热器形成在接近读取头中的传感器的绝缘层中。 第二加热器形成在主极层中靠近写磁极尖端的第二绝缘层中。 两个加热器通过引线串联或并联连接到激活加热器的电源。 在一个实施例中，加热器具有固定的电阻比。 优选地，在电源中有两个驱动器，使得可以将第一功率施加到第一加热器，并且可以将第二功率施加到第二加热器以使得能够调整读取器突出/写入器突出或伽马比率。 实现了快速的读写器驱动，实现了低功耗。

公开(公告)号：US20090251828A1

公开(公告)日：2009-10-08

申请号：US12080276

申请日：2008-04-02

申请人： Erhard Schreck ,  Kowang Liu

发明人： Erhard Schreck ,  Kowang Liu

IPC分类号： G11B5/33

CPC分类号： G11B5/1278 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3116 ,  G11B5/3136 ,  G11B5/3909 ,  G11B5/3912 ,  G11B5/3967 ,  G11B5/6064

摘要： A vertically stacked DFH design in a read/write head is disclosed that allows independent control of write gap protrusion and read gap protrusion. A first heater is formed in an insulation layer proximate to a sensor in a read head. A second heater is formed in a second insulation layer proximate to the write pole tip in a main pole layer. The two heaters are connected in series or in parallel through leads to a power source that activates the heaters. In one embodiment, the heaters have a fixed resistance ratio. Preferably, there are two drivers in the power source so that a first power can be applied to the first heater and a second power can be applied to the second heater to enable an adjustment of reader protrusion/writer protrusion or gamma ratio. Fast reader and writer actuation is achieved and low power consumption is realized.

摘要翻译： 公开了一种读/写头中的垂直堆叠DFH设计，其允许对间隙突出和读取间隙突出的独立控制。 第一加热器形成在接近读取头中的传感器的绝缘层中。 第二加热器形成在主极层中靠近写磁极尖端的第二绝缘层中。 两个加热器通过引线串联或并联连接到激活加热器的电源。 在一个实施例中，加热器具有固定的电阻比。 优选地，在电源中有两个驱动器，使得可以将第一功率施加到第一加热器，并且可以向第二加热器施加第二功率以使得能够调整读取器突出/写入器突出或伽马比率。 实现了快速的读写器驱动，实现了低功耗。