公开(公告)号：US6057991A

公开(公告)日：2000-05-02

申请号：US978586

申请日：1997-11-26

申请人： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

发明人： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

IPC分类号： G11B5/187 ,  G11B5/31 ,  G11B5/39 ,  G11B5/48

CPC分类号： G11B5/3967 ,  G11B5/1878 ,  G11B5/3106 ,  G11B5/3116 ,  G11B5/3163 ,  G11B5/4886 ,  Y10T29/49041 ,  Y10T29/49044 ,  Y10T29/49046

摘要： Disclosed is a merged head device which has: a slider main body with an air bearing surface to a magnetic medium; two magnetic shield films which are parallel disposed on a common plane with a predetermined interval and orthogonal to air flow on the downstream side of the air bearing surface of the slider main body; a magnetoresistive effect head which is disposed through a magnetic separating layer of an insulator between the two magnetic shield films; an inductive head which is composed of one magnetic pole film corresponding to one of the two magnetic shield films which is located downstream and the other magnetic pole film which is disposed through a magnetic gap on the other side of the one magnetic pole film where the magnetoresistive effect head does not exist, and recording is conducted by magnetic field which generates at the magnetic gap; and concave portions which are formed on both sides of the other magnetic pole film along the direction of the air flow on the air bearing surface of the slider main body so as to define a width of the other magnetic pole film; wherein the concave portions are filled with a non-magnetic material.

摘要翻译： 公开了一种合并头装置，其具有：滑动器主体，其具有到磁介质的空气轴承表面; 两个磁屏蔽膜，其平行地设置在公共平面上，具有预定间隔并且与滑块主体的空气支承表面的下游侧上的空气流正交; 磁阻效应头，通过两个磁屏蔽膜之间的绝缘体的磁分离层布置; 感应头由一个对应于位于下游的两个磁屏蔽膜之一的磁极膜构成，另一个磁极膜通过一个磁极膜的另一侧的磁隙设置，其中磁阻 效果头不存在，并且通过在磁隙处产生的磁场进行记录; 以及凹部，其形成在所述另一个磁极膜的两侧，沿着所述滑块主体的空气支承面上的空气流动方向，以限定所述另一个磁极膜的宽度; 其中所述凹部填充有非磁性材料。

公开(公告)号：US5938941A

公开(公告)日：1999-08-17

申请号：US116570

申请日：1998-07-16

申请人： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

发明人： Nobuyuki Ishiwata ,  Tsutomu Ishi ,  Kiyokazu Nagahara ,  Kazumasa Kumagai

IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/00

CPC分类号： G11B5/3116 ,  G11B5/3163 ,  G11B5/3967

摘要： An inductive head structure provided in a magnetoresistance effect composite head includes an inductive head and a magnetoresistance effect head, the inductive head structure including a magnetic gap layer sandwiched by first and second magnetic layers acting as magnetic poles, the first magnetic layer being positioned close to the magnetoresistance effect head, the magnetic gap layer being made of a non-magnetic and electrically insulative material, wherein the non-magnetic and electrically insulative material has a higher etching rate to reactive ion etching than at least a magnetic material of the second magnetic layer.

摘要翻译： 设置在磁阻效应复合头中的感应头结构包括感应头和磁阻效应头，感应头结构包括由用作磁极的第一和第二磁性层夹持的磁隙层，第一磁性层位于 磁阻效应头，磁隙层由非磁性和电绝缘材料制成，其中非磁性和电绝缘材料具有比至少第二磁性层的磁性材料更高的反应离子蚀刻蚀刻速率 。

公开(公告)号：US5959857A

公开(公告)日：1999-09-28

申请号：US956442

申请日：1997-10-23

申请人： Kiyokazu Nagahara

发明人： Kiyokazu Nagahara

IPC分类号： H02J1/00 ,  H02M1/10 ,  H02M3/335 ,  H02M3/337 ,  H02M7/06 ,  H02M7/12 ,  H02M7/48 ,  H02M7/538 ,  H02M7/5387 ,  H02M3/24 ,  H02M7/04

CPC分类号： H02M1/10 ,  H02M3/3376 ,  Y02B70/1433

摘要： A power source apparatus where an exciting current of a primary winding of an insulating converter transformer is switched by a switching element and an oscillation state of an oscillating drive circuit connected to the switching element is controlled according to a secondary side output voltage of the insulating converter transformer for controlling the secondary side output voltage to be a constant voltage. Under the control of the oscillating drive circuit, a supplying path of the exciting current is changed over between two modes of a full bridge action and a single ended push-pull or half bridge action.

摘要翻译： 一种电源装置，其中通过开关元件切换绝缘转换变压器的初级绕组的励磁电流，并且根据绝缘转换器的次级侧输出电压来控制与开关元件连接的振荡驱动电路的振荡状态 用于将次级侧输出电压控制为恒定电压的变压器。 在振荡驱动电路的控制下，激励电流的供电路径在全桥动作和单端推挽或半桥动作的两种模式之间切换。

公开(公告)号：US06343025B1

公开(公告)日：2002-01-29

申请号：US09670444

申请日：2000-09-26

申请人： Kiyokazu Nagahara

发明人： Kiyokazu Nagahara

IPC分类号： H02M112

CPC分类号： H02M1/32 ,  H02M1/36

摘要： A non-control detection protecting circuit is prevented from malfunctioning when a switching converter is started. A latch control circuit 40 makes a non-control detection discrimination signal SDT invalid during a soft start operation. Moreover, a driving circuit 33 stops driving signals SD1 and SD2 for a predetermined period after it is detected that an overload state is set based on the non-control detection discrimination signal SDT, and a soft start circuit 35 is then controlled to carry out the soft start operation. Thus, an intermittent operation is carried out. Furthermore, the soft start control circuit 35 is controlled by the intermittent operation control circuit 50, resulting in the completion of the discharge of a capacitor 36 which sets a soft start period when the soft start operation in the intermittent operation is started.

摘要翻译： 当开关转换器启动时，防止非控制检测保护电路发生故障。 闩锁控制电路40在软启动操作期间使非控制检测鉴别信号SDT无效。 此外，驱动电路33在检测到基于非控制检测判别信号SDT设定了过载状态之后，在预定时间段内停止驱动信号SD1和SD2，然后控制软启动电路35，以执行 软启动操作。 因此，进行间歇操作。 此外，软启动控制电路35由间歇运行控制电路50控制，导致电容器36的放电完成，电容器36在间歇运行中的软启动操作开始时设定软启动时段。

公开(公告)号：US08481339B2

公开(公告)日：2013-07-09

申请号：US13360599

申请日：2012-01-27

申请人： Kiyokazu Nagahara ,  Eiji Kariyada

发明人： Kiyokazu Nagahara ,  Eiji Kariyada

IPC分类号： H01L21/00

CPC分类号： H01L27/228 ,  H01L43/12

摘要： A magnetic memory has a magnetic recording layer, a reference layer connected via a non-magnetic layer to the magnetic recording layer, first and second magnetization pinning layers disposed below the magnetic recording layer. The magnetic recording layer and the reference layer have a perpendicular magnetic anisotropy. The magnetic recording layer has a magnetization reversal region having a reversible magnetization and overlapping the difference layer, a first magnetization pinned region connected to a first boundary of the magnetization reversal region with the direction of the magnetization being fixed in a first direction, and a second magnetization pinned region connected to a second boundary of the magnetization reversal region with the direction of magnetization being fixed in a second direction anti-parallel to the first direction. The first and the second magnetization pinning layers fix the magnetization of the first and the second magnetization pinned regions.

摘要翻译： 磁存储器具有磁记录层，通过非磁性层连接到磁记录层的参考层，设置在磁记录层下方的第一和第二磁化锁定层。 磁记录层和参考层具有垂直的磁各向异性。 磁记录层具有具有可逆磁化的磁化反转区域，与差分层重叠，第一磁化固定区域与磁化反转区域的第一边界连接，磁化方向固定在第一方向，第二磁化固定区域 磁化钉扎区域连接到磁化反转区域的第二边界，其中磁化方向在与第一方向反平行的第二方向上被固定。 第一和第二磁化钉扎层固定第一和第二磁化固定区域的磁化。

公开(公告)号：US06418038B2

公开(公告)日：2002-07-09

申请号：US09878655

申请日：2001-06-11

申请人： Masanobu Takahama ,  Kiyokazu Nagahara

发明人： Masanobu Takahama ,  Kiyokazu Nagahara

IPC分类号： H02M3335

CPC分类号： H02M3/337 ,  Y02B70/1433

摘要： A DC-DC converter includes a switching unit having a pair of switching devices or transistors, a resonant circuit comprising a capacitor, an inductor, and a primary coil of a converter transformer which serves as an inductor, a smoothing and rectifying circuit connected to a load in the secondary, an error amplifier for the output voltage, and a variable oscillator for varying the switching frequency according to the error voltage. The output of the variable oscillator circuit is supplied to the switching devices to provide a stabilized output voltage from the smoothing and rectifying circuit. The switching frequency during light loading is set at a frequency more than the resonant frequency which is mainly defined by the inductance and the interwinding capacitance of the secondary coil. The switching frequency to stabilize the output voltage during light loading is much higher than that during heavy loading, significantly reducing the exciting current component during light loading to enhance the energy conversion efficiency during light loading.

公开(公告)号：US06538861B1

公开(公告)日：2003-03-25

申请号：US09597458

申请日：2000-06-19

申请人： Kazuhiko Hayashi ,  Masafumi Nakada ,  Eizo Fukami ,  Kiyokazu Nagahara ,  Hiroaki Honjou ,  Kunihiko Ishihara ,  Tamaki Toba ,  Hisanao Tsuge ,  Atsushi Kamijo

发明人： Kazuhiko Hayashi ,  Masafumi Nakada ,  Eizo Fukami ,  Kiyokazu Nagahara ,  Hiroaki Honjou ,  Kunihiko Ishihara ,  Tamaki Toba ,  Hisanao Tsuge ,  Atsushi Kamijo

IPC分类号： G11B539

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  H01F10/3254

摘要： A magnetoresistive head whose operation depends on a magnetoresistive effect is configured using a ferromagnetic tunnel junction (MTJ) film, which is arranged between a lower electrode and an upper electrode. The ferromagnetic tunnel junction film is basically configured using a set of a free layer, a barrier layer and a fixing layer, which are sequentially formed and laminated on the lower electrode. Herein, the ferromagnetic tunnel junction film is designed to avoid electrostatic destruction in manufacture by prescribed measures. For example, the barrier layer is reduced in thickness at a terminal portion as compared with a center portion. Or, the barrier layer has a defect at the terminal portion. In addition, it is possible to provide a conductor in connection with the barrier layer in proximity to its terminal portion. Further, it is possible to attach re-adhesive substance, which is produced by milling for patterning of the ferromagnetic tunnel junction film, to a specific terminal surface of the ferromagnetic tunnel junction film which is opposite to an ABS plane. Those measures provide a bypass allowing overcurrent release between the free layer and fixing layer. Moreover, adjustment milling or plasma oxidation is employed to control an amount of the re-adhesive substance being attached to the terminal surface of the ferromagnetic tunnel junction film. Thus, by adequately optimizing the amount of the re-adhesive substance, it is possible to improve yield in manufacturing the magnetoresistive heads.

摘要翻译： 使用布置在下电极和上电极之间的铁磁隧道结（MTJ）膜来构造其磁阻效应的操作的磁阻头。 铁磁隧道结膜基本上是使用一组自由层，阻挡层和固定层构成的，它们依次形成并层压在下电极上。 这里，铁磁隧道结膜被设计成通过规定的措施避免制造中的静电破坏。 例如，与中心部分相比，阻挡层在端子部分的厚度减小。 或者，阻挡层在端子部分具有缺陷。 此外，可以在其端子部分附近提供与阻挡层相关的导体。 此外，可以将通过研磨制造的用于图案化铁磁性隧道结膜的再粘合物质附着到与ABS平面相反的铁磁性隧道结膜的特定末端表面。 这些措施提供了允许在自由层和固定层之间过电流释放的旁路。 此外，调整研磨或等离子体氧化被用于控制附着到铁磁性隧道结膜的终端表面上的再粘合物质的量。 因此，通过充分优化再粘合物质的量，可以提高制造磁阻磁头的成品率。

公开(公告)号：US06515379B1

公开(公告)日：2003-02-04

申请号：US09587590

申请日：2000-06-02

申请人： Koichi Nojima ,  Kiyokazu Nagahara

发明人： Koichi Nojima ,  Kiyokazu Nagahara

IPC分类号： H02H326

CPC分类号： H02M1/10 ,  H02M2001/0032 ,  Y02B70/16 ,  Y10T307/615 ,  Y10T307/858

摘要： When a relay (21) is controlled, an AC voltage (1) may be rectified in a full-wave rectification fashion. In a voltage-doubler rectification fashion, and a rectified output supplied to a main converter (6) or the AC voltage (1) may be rectified in a half-wave rectification fashion, and a rectified output supplied to a standby converter (10). A just detection circuit (23) detects a rectified voltage of the standby side, and a detection circuit (24) may detect a rectified voltage supplied to the main converter (6). The first and second voltage detection circuits (23) and (24) control operations of relay drive circuits (21D and 22D) based on both detection signals so that any one of two relay contacts (21a and 22a) may be turned on. Since a voltage of the rectified output supplied to the main converter (6) may be detected and its detection signal also may be used for control, a detection timing can be made fast so that, even when the voltage of the commercially-available voltage is fluctuated suddenly, the rectification systems can be switched immediately.

摘要翻译： 当继电器（21）被控制时，AC电压（1）可以以全波整流方式整流。 以倍压整流的方式，提供给主转换器（6）或交流电压（1）的整流输出可以以半波整流方式整流，提供给备用转换器（10）的整流输出， 。 检测电路（23）检测待机侧的整流电压，检测电路（24）可以检测供给主转换器（6）的整流电压。 基于两个检测信号，第一和第二电压检测电路（23）和（24）控制继电器驱动电路（21D和22D）的操作，使得两个继电器触点（21a和22a）中的任何一个可以被接通。 由于可以检测提供给主转换器（6）的整流输出的电压，并且其检测信号也可以用于控制，所以可以快速地进行检测定时，使得即使当市售电压的电压为 突然波动，整改系统可立即切换。

公开(公告)号：US06449172B2

公开(公告)日：2002-09-10

申请号：US09748293

申请日：2000-12-26

申请人： Kiyokazu Nagahara

发明人： Kiyokazu Nagahara

IPC分类号： H02M3335

CPC分类号： H02M1/36 ,  H02M3/335

摘要： A power supply apparatus includes a variable frequency oscillating circuit, a driver, a soft start circuit, switching elements for receiving a switching signal, a resonating capacitor connected at a connection point of the switching elements via a primary coil of a transformer, a rectifying circuit provided at a secondary coil of the transformer, an amplifier for comparing an output voltage, Vb obtained at the rectifying circuit and a reference voltage, Vref, a photo-coupler for controlling an impedance of an oscillating element of a variable frequency oscillating circuit based on the comparison output, and a charge voltage control circuit for controlling an oscillation frequency when the variable oscillation circuit is initially driven. A frequency control signal when power is ON is made nonlinear relative to time. As a result, a change in oscillation frequency immediately after power is ON is made gentle, and a rapid change in current that flows in a primary coil is eliminated. Therefore, no over-current flows in the switching elements, damage to switching elements can be reduced more significantly than conventionally, and these switching elements can be reliably protected.

摘要翻译： 电源装置包括可变频振荡电路，驱动器，软启动电路，用于接收开关信号的开关元件，经由变压器的初级线圈在开关元件的连接点处连接的谐振电容器，整流电路 设置在变压器的次级线圈上的放大器，用于将在整流电路获得的输出电压Vb与参考电压Vref进行比较的放大器，用于控制可变频率振荡电路的振荡元件的阻抗的光耦合器，基于 比较输出，以及用于当最初驱动可变振荡电路时控制振荡频率的充电电压控制电路。 电源ON时的频率控制信号相对于时间是非线性的。 结果，紧接在电源接通之后的振荡频率的变化变得平缓，并且消除了在初级线圈中流动的电流的快速变化。 因此，不会在开关元件中产生过电流，所以与以往相比，开关元件的损坏可以得到显着降低，可以可靠地保护开关元件。

公开(公告)号：US06433969B1

公开(公告)日：2002-08-13

申请号：US09580452

申请日：2000-05-30

申请人： Kiyokazu Nagahara

发明人： Kiyokazu Nagahara

IPC分类号： G11B539

CPC分类号： G11B5/3967 ,  G11B5/3133 ,  G11B5/3163 ,  G11B5/40

摘要： A compound magnetoresistive effect head has a dedicated playback head formed by a magnetoresistive effect element disposed between magnetic shields, with a magnetic gap therebetween, and a dedicated recording head having a function of performing recording by a magnetic field generated in a gap provided between magnetic poles. An electrode film for the purpose of causing a current to flow in a ferromagnetic film and a magnetoresistive effect film for stabilizing magnetization of the magnetoresistive effect film is formed so as to be magnetically and electrically connected to both ends of the magnetoresistive effect film, and a flattening film is provided between the first and second magnetic separation films in the magnetoresistive effect element height direction of the playback head.

摘要翻译： 复合磁阻效应头具有由设置在磁屏蔽之间的磁屏蔽之间的磁阻效应元件形成的专用重放头，以及具有通过在磁极之间设置的间隙中产生的磁场进行记录的功能的专用记录头 。 形成用于使铁磁膜中的电流流过的电极膜和用于稳定磁阻效应膜的磁化的磁阻效应膜，以磁性和电连接到磁阻效应膜的两端，并且 在再现头的磁阻效应元件高度方向上的第一和第二磁分离膜之间设置有平坦化膜。