公开(公告)号：US5547751A

公开(公告)日：1996-08-20

申请号：US209258

申请日：1994-03-14

Applicant: Yoshio Fujii ,  Takashi Tokunaga ,  Yoshiyuki Nakaki ,  Kazuhiko Tsutsumi ,  Kazuo Hashima ,  Tatsuya Fukami ,  Yuji Kawano

Inventor： Yoshio Fujii ,  Takashi Tokunaga ,  Yoshiyuki Nakaki ,  Kazuhiko Tsutsumi ,  Kazuo Hashima ,  Tatsuya Fukami ,  Yuji Kawano

IPC: G11B11/105 ,  G11B5/66

CPC classification number: G11B11/10586 ,  G11B11/10506 ,  Y10S428/90 ,  Y10T428/265

Abstract: A magneto-optical recording medium wherein an initializing layer is covered with a resin layer for dissipating heat from the initializing layer thereby to prevent signal degradation at high recording power and thus excellent in-record/reproduce repetition times, and the initializing layer is compositionally modulated thereby to broaden allowable ranges for the recording/reproducing light intensity and for the external magnetic field, besides the composition of a first or a second magnetic layer is controlled thereby to enhance recording sensitivity, and the exchange-coupling force between the first and second magnetic layers or the magnetic field strengthe to reverse the magnetization of the first magnetic layer is controlled thereby to enhance the recording/reproducing characteristics.

Abstract translation: 一种磁光记录介质，其中用树脂层覆盖初始化层以从初始化层散热，从而防止在高记录功率下的信号劣化，从而优良的记录/再现重复次数，并且初始化层被组成调制 从而扩大了记录/再现光强度和外部磁场的允许范围，此外控制第一或第二磁性层的组成以提高记录灵敏度，并且第一和第二磁性之间的交换耦合力 层或磁场强化以反转第一磁性层的磁化，从而增强记录/再现特性。

公开(公告)号：US5143797A

公开(公告)日：1992-09-01

申请号：US394012

申请日：1989-08-15

Applicant: Kazuo Hashima ,  Kazuhiko Tsutsumi ,  Hiroshi Sugahara

Inventor： Kazuo Hashima ,  Kazuhiko Tsutsumi ,  Hiroshi Sugahara

IPC: G11B11/10 ,  G11B11/105

CPC classification number: G11B11/10586 ,  G11B11/10584

Abstract: A magneto-optical recording medium comprises a dielectric film disposed on a substrate and formed, for example, of silicon nitride, of for example, 65 nm thickness, a magnetic film disposed on the dielectric film, and formed, for example, of, rare earth-transistion metal alloy thin film, of, for example, 35 thickness, and a reflective film disposed on the magnetic film, and formed of titanium nitride, by, for example, sputtering.

Abstract translation: 磁光记录介质包括设置在基板上并例如由氮化硅形成例如65nm厚度的介电膜，设置在电介质膜上的磁性膜，例如由罕见的 地球转移金属合金薄膜，例如35厚度，以及设置在磁膜上的反射膜，并通过例如溅射由氮化钛形成。

公开(公告)号：US5593791A

公开(公告)日：1997-01-14

申请号：US543517

申请日：1995-10-16

Applicant: Yoshio Fujii ,  Takashi Tokunaga ,  Yoshiyuki Nakaki ,  Kazuhiko Tsutsumi ,  Kazuo Hashima ,  Tatsuya Fukami ,  Yuji Kawano

Inventor： Yoshio Fujii ,  Takashi Tokunaga ,  Yoshiyuki Nakaki ,  Kazuhiko Tsutsumi ,  Kazuo Hashima ,  Tatsuya Fukami ,  Yuji Kawano

IPC: G11B11/105 ,  G11B5/66

CPC classification number: G11B11/10586 ,  G11B11/10506 ,  Y10S428/90 ,  Y10T428/265

Abstract: A magneto-optical recording medium wherein an initializing layer is covered with a resin layer for dissipating heat from the initializing layer thereby to prevent signal degradation at high recording power and thus excellent in record/reproduce repetition times, and the initializing layer is compositionally modulated thereby to broaden allowable ranges for the recording/reproducing light intensity and for the external magnetic field, besides the composition of a first or a second magnetic layer is controlled thereby to enhance recording sensitivity, and the exchange-coupling force between the first and second magnetic layers or the magnetic field strengthe to reverse the magnetization of the first magnetic layer is controlled thereby to enhance the recording/reproducing characteristics.

Abstract translation: 一种磁光记录介质，其中初始化层被用于从初始化层散热的树脂层覆盖，从而防止在高记录功率下的信号劣化，从而优良的记录/再现重复次数，并且初始化层被组成调制 为了扩大记录/再现光强度和外部磁场的允许范围，控制第一或第二磁性层的组成，从而提高记录灵敏度，并且第一和第二磁性层之间的交换耦合力 或者磁场增强以逆转第一磁性层的磁化，从而增强记录/再现特性。

公开(公告)号：US5347485A

公开(公告)日：1994-09-13

申请号：US25250

申请日：1993-03-02

Applicant: Motohisa Taguchi ,  Tatsuya Fukami ,  Kazuo Hashima ,  Yukari Toide ,  Yuji Kawano ,  Yoshio Fujii ,  Takashi Tokunaga ,  Yoshiyuki Nakaki ,  Kazuhiko Tsutsumi ,  Hiroshi Kobayashi ,  Yuzou Ohdoi ,  Shinji Tanabe ,  Hiroshi Shibata

Inventor： Motohisa Taguchi ,  Tatsuya Fukami ,  Kazuo Hashima ,  Yukari Toide ,  Yuji Kawano ,  Yoshio Fujii ,  Takashi Tokunaga ,  Yoshiyuki Nakaki ,  Kazuhiko Tsutsumi ,  Hiroshi Kobayashi ,  Yuzou Ohdoi ,  Shinji Tanabe ,  Hiroshi Shibata

IPC: G11C11/15 ,  G11C11/18

CPC classification number: G11C11/15 ,  G11C11/18

Abstract: A magnetic thin film memory wherein the memory is composed of magnetic thin films with a layer of a higher coercive force and a layer of a lower coercive force via a nonmagnetic layer laminated repetitively, or magnetic thin films having the easy magnetization axis which lies between the perpendicular and the horizontal directions of the magnetic thin film, and information is recorded on the layer of a lower coercive force, or information is recorded by changing the direction of the magnetization by means of a magnetic field applied by two recording lines which cross the magnetic thin film, thereby to obtain a sufficient amplitude of reproduction signal even when the size of the memory is reduced.

Abstract translation: 一种磁性薄膜存储器，其中存储器由具有较高矫顽力的层的磁性薄膜和重复层叠的非磁性层的矫顽力较低的层组成，或者具有容易磁化轴的磁性薄膜位于 磁性薄膜的垂直方向和水平方向，信息被记录在矫顽力较低的层上，或通过利用穿过磁性体的两条记录线施加的磁场改变磁化方向来记录信息 从而即使当存储器的尺寸减小时也获得足够的再现信号幅度。

公开(公告)号：US5337305A

公开(公告)日：1994-08-09

申请号：US016030

申请日：1993-02-10

Applicant: Kazuo Hashima ,  Yuji Kawano ,  Tatsuya Fukami ,  Kazuhiko Tsutsumi ,  Yoshiyuki Nakaki ,  Takashi Tokunaga ,  Yoshio Fujii

Inventor： Kazuo Hashima ,  Yuji Kawano ,  Tatsuya Fukami ,  Kazuhiko Tsutsumi ,  Yoshiyuki Nakaki ,  Takashi Tokunaga ,  Yoshio Fujii

IPC: G11B7/00 ,  G11B7/0045 ,  G11B7/006 ,  G11B7/125 ,  G11B7/30 ,  G11B11/10 ,  G11B11/105 ,  G11B7/085

CPC classification number: G11B7/126 ,  G11B11/10595 ,  G11B7/006 ,  G11B11/10517

Abstract: An information storage system for recording and reproducing information by use of irradiating light on a medium capable of overwriting information is provided. The information storage system is capable of recording information even if the light intensity is varied so as to enhance reliability. The intensity of the light at the time of overwriting is modulated, the more intense light intensity being P.sub.H and the less intense light intensity being P.sub.L. The system includes a mechanism to keep relationship of P.sub.H +.alpha.P.sub.L equal to a constant (.alpha. being a constant depending on the recording conditions). The laser drive circuit is so adjusted that P.sub.H and P.sub.L always provide an optimal condition even if P.sub.H and/or P.sub.L vary. Thus recording can always be performed under optimal conditions to enhance the reliability of the information storage system to expand the power margin of a recording medium and to increase the percentage yield of information medium.

Abstract translation: 提供了一种用于通过在能够覆盖信息的介质上照射光来记录和再现信息的信息存储系统。 信息存储系统即使改变光强度也能够记录信息，从而提高可靠性。 调制重写时光强度，光强度越高，PH越强，光强度越小。 该系统包括保持PH +αPL的关系等于一个常数的机制（根据记录条件，α是一个常数）。 激光驱动电路如此调整，即使PH和/或PL变化，PH和PL总是提供最佳条件。 因此，可以始终在最佳条件下执行记录，以增强信息存储系统的可靠性，以扩大记录介质的功率余量并提高信息介质的产量百分比。