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1. 发明申请

US20100232050A1 Power control of TAMR element during read/write transition 有权
标题翻译：读/写转换期间TAMR元件的功耗控制
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。

2. 发明授权

US6123781A Method of controlling magnetic characteristics of spin-valve magnetoresistive element and of magnetic head with the element 失效
标题翻译：自旋阀磁阻元件和磁头的磁特性控制方法
公开(公告)号：US6123781A
公开(公告)日：2000-09-26
申请号：US27773
申请日：1998-02-23
申请人： Kouji Shimazawa
发明人： Kouji Shimazawa
IPC分类号： G01R33/09 , G11B5/00 , G11B5/012 , G11B5/02 , G11B5/31 , G11B5/39 , G11B5/40 , G11B5/455 , G11B19/00 , G11B19/04 , H01F10/00 , H01F10/08 , H01F10/32 , H01L43/08
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/3166 , G11B5/3903 , G11B5/40 , G11B5/455 , H01F10/3268 , G11B19/00 , G11B19/04 , G11B2005/0008 , G11B2005/3996 , G11B5/02
摘要： A method of controlling magnetic characteristics of a spin valve effect MR element and a method of controlling magnetic characteristics of a magnetic head with the MR element include a step of supplying direct current with a gradually increasing value to the MR element so as to generate magnetic field in a desired direction and to generate joule heat, the generated magnetic field and the generated joule heat being applied to the MR element, and a step of controlling a magnetization direction caused by exchange coupling in the MR element based upon the applied magnetic field and the applied joule heat.
摘要翻译：控制自旋阀效应MR元件的磁特性的方法以及利用MR元件控制磁头的磁特性的方法包括向MR元件提供逐渐增加的直流电流以产生磁场的步骤在所需方向上产生焦耳热，所产生的磁场和产生的焦耳热被施加到MR元件，以及基于所施加的磁场和MR元件中由MR元件中的交换耦合引起的磁化方向的控制步骤，应用焦耳热。

3. 发明授权

US08593915B2 Thermally-assisted magnetic recording head capable of reducing the transient protrusion of an antenna 有权
标题翻译：能够减少天线瞬态突起的热辅助磁记录头
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。

4. 发明申请

US20110292773A1 Power control of TAMR element during read/write transition 有权
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.

5. 发明授权

US07995425B2 Power control of TAMR element during read/write transition 有权
标题翻译：读/写转换期间TAMR元件的功耗控制
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。

6. 发明授权

US6081114A Method and apparatus for testing magnetic head with magnetoresistive element 失效
标题翻译：用磁阻元件测试磁头的方法和装置
公开(公告)号：US6081114A
公开(公告)日：2000-06-27
申请号：US24402
申请日：1998-02-17
申请人： Kouji Shimazawa , Masanori Sakai
发明人： Kouji Shimazawa , Masanori Sakai
IPC分类号： G11B5/39 , G11B5/00 , G11B5/012 , G11B5/455 , G11B5/82 , G01R33/12
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/455 , G11B2005/0008 , G11B2005/0016 , G11B2005/3996 , G11B5/012 , G11B5/82
摘要： A method of testing a magnetic head with a spin-valve MR element having a pinned direction, includes a step of reproducing magnetic information recorded on a magnetic medium by the spin-valve MR element of the magnetic head to be tested to generate a reproduced signal, the information being recorded on the magnetic medium by using a rectangular wave current with a predetermined pattern, and a step of judging whether the pinned direction of the spin-valve MR element is correct in accordance with a relationship between wave shape of the reproduced signal and the predetermined pattern.
摘要翻译：一种用具有钉扎方向的自旋阀MR元件测试磁头的方法包括通过待测试磁头的自旋阀MR元件再现记录在磁性介质上的磁信息以产生再现信号的步骤通过使用具有预定图案的矩形波电流将信息记录在磁介质上，以及根据再现信号的波形形状来判断自旋阀MR元件的钉扎方向是否正确的步骤和预定图案。

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