公开(公告)号：US5783320A

公开(公告)日：1998-07-21

申请号：US781711

申请日：1997-01-10

申请人： Katsusuke Shimazaki ,  Satoru Ohnuki ,  Masatoshi Hashimoto ,  Yoshinori Shirai ,  Norio Ohta ,  Hideo Fujiwara ,  Masafumi Yoshihiro ,  Yukinori Yamada ,  Eiji Koyama ,  Hitoshi Furusho

发明人： Katsusuke Shimazaki ,  Satoru Ohnuki ,  Masatoshi Hashimoto ,  Yoshinori Shirai ,  Norio Ohta ,  Hideo Fujiwara ,  Masafumi Yoshihiro ,  Yukinori Yamada ,  Eiji Koyama ,  Hitoshi Furusho

IPC分类号： G11B7/26 ,  G11B11/105 ,  G11B5/66

CPC分类号： G11B11/10591 ,  G11B11/10584 ,  G11B11/10586 ,  G11B11/10589 ,  G11B7/26 ,  Y10S428/90 ,  Y10T428/12771 ,  Y10T428/12931

摘要： Disclosed is a magneto-optical recording medium which comprises a transparent substrate and, provided on the substrate, a magneto-optical recording film comprising a perpendicular magnetic film based on rare earth metal-transition metal and an auxiliary magnetic film having spontaneous magnetization which exerts, between itself and the magneto-optical recording film, an exchange coupling force on each other and in which the auxiliary magnetic film used is a magnetic film which readily rotates its magnetization direction toward the external magnetic field in the neighborhood of the Curie temperature of the magneto-optical recording film and has a squareness ratio of not more than 1 in the neighborhood of the Curie temperature, and a process for producing the magneto-optical recording medium.

摘要翻译： 公开了一种磁光记录介质，其包括透明基板，并且在基板上设置包括基于稀土金属 - 过渡金属的垂直磁性膜和具有自发磁化的辅助磁膜的磁光记录膜， 在它们自身和磁光记录膜之间，彼此之间的交换耦合力，并且其中使用的辅助磁膜是磁性薄膜，其容易地使其磁化方向在磁光的居里温度附近的外部磁场旋转 - 光学记录膜，并且在居里温度附近具有不大于1的矩形比率，以及用于制造磁光记录介质的工艺。

公开(公告)号：US5637411A

公开(公告)日：1997-06-10

申请号：US227673

申请日：1994-04-14

申请人： Katsusuke Shimazaki ,  Satoru Ohnuki ,  Masatoshi Hashimoto ,  Yoshinori Shirai ,  Norio Ohta ,  Hideo Fujiwara ,  Masafumi Yoshihiro ,  Yukinori Yamada ,  Eiji Koyama ,  Hitoshi Furusho

发明人： Katsusuke Shimazaki ,  Satoru Ohnuki ,  Masatoshi Hashimoto ,  Yoshinori Shirai ,  Norio Ohta ,  Hideo Fujiwara ,  Masafumi Yoshihiro ,  Yukinori Yamada ,  Eiji Koyama ,  Hitoshi Furusho

IPC分类号： G11B7/26 ,  G11B11/105 ,  G11B5/66

CPC分类号： G11B11/10591 ,  G11B11/10584 ,  G11B11/10586 ,  G11B11/10589 ,  G11B7/26 ,  Y10S428/90 ,  Y10T428/12771 ,  Y10T428/12931

摘要： Disclosed is a magneto-optical recording medium which comprises a transparent substrate and, provided on the substrate, a magneto-optical recording film comprising a perpendicular magnetic film based on rare earth metal-transition metal and an auxiliary magnetic film having spontaneous magnetization which exerts, between itself and the magneto-optical recording film, an exchange coupling force and wherein the auxiliary magnetic film is a magnetic film which readily rotates its magnetization direction toward the external magnetic field in the neighborhood of the Curie temperature of the magneto-optical recording film and has a squareness ratio of not more than 1 in the neighborhood of the Curie temperature. Also disclosed is a process for producing the magneto-optical recording medium.

摘要翻译： 公开了一种磁光记录介质，其包括透明基板，并且在基板上设置包括基于稀土金属 - 过渡金属的垂直磁性膜和具有自发磁化的辅助磁膜的磁光记录膜， 介于其自身与磁光记录膜之间的交换耦合力，并且其中辅助磁膜是在磁光记录膜的居里温度附近容易地将其磁化方向旋转到外部磁场的磁性膜， 在居里温度附近具有不大于1的矩形比。 还公开了一种用于制造磁光记录介质的方法。

公开(公告)号：US5639563A

公开(公告)日：1997-06-17

申请号：US247119

申请日：1994-05-20

申请人： Satoru Ohnuki ,  Katsusuke Shimazaki ,  Norio Ohta ,  Hideo Fujiwara ,  Masafumi Yoshihiro ,  Noriyuki Ogihara ,  Yukinori Yamada

发明人： Satoru Ohnuki ,  Katsusuke Shimazaki ,  Norio Ohta ,  Hideo Fujiwara ,  Masafumi Yoshihiro ,  Noriyuki Ogihara ,  Yukinori Yamada

IPC分类号： G11B7/26 ,  G11B11/105 ,  H01F1/00 ,  G11B5/66 ,  G11B5/70

CPC分类号： G11B11/10593 ,  G11B11/10582 ,  G11B11/10584 ,  G11B11/10586 ,  G11B11/10589 ,  G11B11/10591 ,  G11B7/26 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/265

摘要： A magneto-optical recording medium having a thin film with a suitable thermal conductivity, laminated on magneto-optical film, having excellent durability to repeated recording, reproducing and erasing comprising one layer or a multi-layer of thin film containing at least a magneto-optical recording film carried on a transparent substrate, a ferromagnetic reflection film having a reflectance to a reproduction beam of 70% or higher and a thermal conductivity at a normal temperature from 0.05 to 2.0 W/cm.deg laminated on the backside of the magneto-optical recording film viewed from the transparent substrate side and, optionally, a heat control layer having a thermal conductivity at a normal temperature of 0.1 to 2.0 W/cm.deg may be laminated on the backside of the magneto-optical film.

摘要翻译： 一种磁光记录介质，其具有层叠在磁光膜上的具有合适导热性的薄膜，对重复记录，再现和擦除具有优异的耐久性，其包括至少含有磁致伸缩层的一层或多层薄膜， 携带在透明基板上的光学记录膜，具有70％以上的再现光束的反射率的铁磁性反射膜，以及层叠在磁光记录介质的背面的常规温度为0.05〜2.0W / cm·s的导热率， 从透明基板侧观察的光记录膜和可选地，在常温为0.1〜2.0W / cm·d的热导率的热控层可以层叠在磁光膜的背面。

公开(公告)号：US5965286A

公开(公告)日：1999-10-12

申请号：US794349

申请日：1997-02-03

申请人： Satoru Ohnuki ,  Katsusuke Shimazaki ,  Norio Ohta ,  Hideo Fujiwara ,  Masafumi Yoshihiro ,  Noriyuki Ogihara ,  Yukinori Yamada

发明人： Satoru Ohnuki ,  Katsusuke Shimazaki ,  Norio Ohta ,  Hideo Fujiwara ,  Masafumi Yoshihiro ,  Noriyuki Ogihara ,  Yukinori Yamada

IPC分类号： G11B7/26 ,  G11B11/105 ,  G11B5/66

CPC分类号： G11B11/10593 ,  G11B11/10582 ,  G11B11/10584 ,  G11B11/10586 ,  G11B11/10589 ,  G11B11/10591 ,  G11B7/26 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/265

摘要： A magneto-optical recording medium having a thin film, with suitable thermal conductivity, laminated on a magneto-optical film having excellent durability to repeated recording, reproducing and erasing comprising one layer or a multi-layer of thin film containing at least a magneto-optical recording film and carried on a transparent substrate, a ferromagnetic reflection film having a reflectance to a reproduction beam of 70% or higher and a thermal conductivity at a normal temperature from 0.05 to 2.0 W/cm.deg laminated on the backside of the magneto-optical recording film viewed from the transparent substrate side and, optionally, a heat control layer having a thermal conductivity at a normal temperature of 0.1 to 2.0 W/cm.deg laminated on the backside of the magneto-optical film.

摘要翻译： 一种具有合适导热性的薄膜的磁光记录介质层叠在具有优异耐久性的重复记录，再现和擦除的磁光膜上，包括一层或多层薄膜，该薄膜至少含有磁 - 光学记录膜并承载在透明基板上，具有反射率为70％或更高的再现光束的铁磁反射膜以及层压在磁体背面上的常规温度为0.05至2.0W / cm的热导率 - 从透明基板侧观察的光学记录膜，以及可选地在层叠在磁光膜的背面上的在常温下为0.1〜2.0W / cm·s的导热率的热控制层。

公开(公告)号：US06246640B1

公开(公告)日：2001-06-12

申请号：US09129750

申请日：1998-08-05

申请人： Katsusuke Shimazaki ,  Masafumi Yoshihiro ,  Akito Sakemoto ,  Norio Ohta ,  Osamu Ishizaki ,  Satoru Ohnuki ,  Toshinori Sugiyama ,  Kazuko Ishitsuka

发明人： Katsusuke Shimazaki ,  Masafumi Yoshihiro ,  Akito Sakemoto ,  Norio Ohta ,  Osamu Ishizaki ,  Satoru Ohnuki ,  Toshinori Sugiyama ,  Kazuko Ishitsuka

IPC分类号： G11B1100

CPC分类号： G11B11/10515 ,  G11B11/10502 ,  G11B11/10508 ,  G11B11/1051 ,  G11B11/10521 ,  G11B11/10528 ,  G11B11/1053 ,  G11B11/10534 ,  G11B11/10554 ,  G11B11/10586 ,  G11B11/10595

摘要： On a surface of a transparent substrate 1 having a preformat pattern 2 formed thereon are laminated a first recording layer 4 in which a recording state exists in one different magnetic field region of an applied external magnetic field and a second recording layer 6 in which two recording states exist in magnetic field regions different from that for the first recording layer. As required, dielectric layers 3, 5 and 7, a reflecting layer 8 and a protection layer 9 can be laminated. The 4-valued recording of information becomes possible by assigning information signals “1”, “0”, “3”, and “2” to H0, H1, H2 and H3, respectively.

摘要翻译： 在其上形成有预格式化图案2的透明基板1的表面上层叠有其中记录状态存在于施加的外部磁场的一个不同磁场区域中的第一记录层4和其中两个记录 状态存在于与第一记录层不同的磁场区域中。 根据需要，可以层压电介质层3,5和7，反射层8和保护层9。 分别向H0，H1，H2和H3分配信息信号“1”，“0”，“3”和“2”，信息的4值记录成为可能。

公开(公告)号：US6101153A

公开(公告)日：2000-08-08

申请号：US129745

申请日：1998-08-05

申请人： Katsusuke Shimazaki ,  Masafumi Yoshihiro ,  Akito Sakemoto ,  Norio Ohta ,  Osamu Ishizaki ,  Satoru Ohnuki ,  Toshinori Sugiyama ,  Kazuko Ishitsuka

发明人： Katsusuke Shimazaki ,  Masafumi Yoshihiro ,  Akito Sakemoto ,  Norio Ohta ,  Osamu Ishizaki ,  Satoru Ohnuki ,  Toshinori Sugiyama ,  Kazuko Ishitsuka

IPC分类号： G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10515 ,  G11B11/10502 ,  G11B11/1051 ,  G11B11/10528 ,  G11B11/10534 ,  G11B11/10586 ,  G11B11/10508 ,  G11B11/10521 ,  G11B11/1053 ,  G11B11/10554 ,  G11B11/10595

摘要： An optomagnetic recording and reproducing system has been developed which demonstrates superior performance when used with multilayer recording substrates. The system features an optical head and magnetic head disposed opposite to each other on different sides of the recording substrate. The novel magnetic head can either incorporate a number of independently driven subheads, or alternately it can be constructed by placing multiple independently driven windings on a single head. Biasing of the magnetic head can either be performed externally using an external magnet or by providing a bias with one of the windings or sub-heads. The resulting optomagnetic recording and reproducing system is suitable for multi-valued recording of an optomagnetic recording medium.

摘要翻译： 已经开发了一种在使用多层记录基板时表现出优异性能的光磁记录和再现系统。 该系统具有在记录基板的不同侧面彼此相对设置的光学头和磁头。 新颖的磁头可以并入多个独立驱动的子头，或者也可以通过将多个独立驱动的绕组放置在单个头上来构造。 磁头的偏置可以使用外部磁体在外部执行，也可以通过与绕组或副磁头之一提供偏置。 所得的光磁记录和再现系统适用于光磁记录介质的多值记录。

公开(公告)号：US06385140B2

公开(公告)日：2002-05-07

申请号：US09799602

申请日：2001-03-07

申请人： Satoru Ohnuki ,  Norio Ohta ,  Katsusuke Shimazaki ,  Masafumi Yoshihiro ,  Hiroki Takao ,  Hitoshi Watanabe

发明人： Satoru Ohnuki ,  Norio Ohta ,  Katsusuke Shimazaki ,  Masafumi Yoshihiro ,  Hiroki Takao ,  Hitoshi Watanabe

IPC分类号： G11B1100

CPC分类号： G11B11/10515 ,  G11B11/10584 ,  G11B11/10593

摘要： A magneto-optic recording medium includes a second auxiliary magnetic film, a first auxiliary magnetic film and a magneto-optic recording film on a substrate. The auxiliary magnetic films change from in-plane magnetization to vertical magnetization at critical temperatures TCR1 and TCR2. Since they have the relation TCR1>TCR2, the magnetic domain transferred from the magneto-optic recording film to the first auxiliary magnetic film at the time of reproduction is expanded in diameter and is transferred to the second auxiliary magnetic film when the temperature profiles of the auxiliary magnetic films inside an optical spot are utilized. The magnetic domain of the magneto-optic recording film can be expanded and transferred, too, by means of magnetostatic coupling by using a non-magnetic film in place of the first auxiliary magnetic film. Pulse reproduction light subjected to power modulation in synchronism with a reproduction clock can be used at the time of reproduction. Even when a very small magnetic domain is recorded, the intensity of an amplified reproduction signal can be detected and excellent C/N can be obtained.

摘要翻译： 磁光记录介质包括在基板上的第二辅助磁膜，第一辅助磁膜和磁光记录膜。 在临界温度TCR1和TCR2下，辅助磁膜从面内磁化转变为垂直磁化。 由于它们具有关系TCR1> TCR2，所以在再现时从磁光记录膜转移到第一辅助磁性膜的磁畴的直径扩大并且当第二辅助磁性膜的温度分布 利用光点内的辅助磁膜。 磁光记录膜的磁畴也可以通过使用非磁性膜代替第一辅助磁性膜的静磁耦合来扩展和转移。 在再现时可以使用经受与再现时钟同步的功率调制的脉冲再现光。 即使记录非常小的磁畴，也可以检测出放大的再现信号的强度，可以获得优异的C / N。

公开(公告)号：US06226234B1

公开(公告)日：2001-05-01

申请号：US09091480

申请日：1998-06-19

申请人： Satoru Ohnuki ,  Norio Ohta ,  Katsusuke Shimazaki ,  Masafumi Yoshihiro ,  Hiroki Takao ,  Hitoshi Watanabe

发明人： Satoru Ohnuki ,  Norio Ohta ,  Katsusuke Shimazaki ,  Masafumi Yoshihiro ,  Hiroki Takao ,  Hitoshi Watanabe

IPC分类号： G11B1100

CPC分类号： G11B11/10515 ,  G11B11/10584 ,  G11B11/10593

摘要： A magneto-optic recording medium includes a second auxiliary magnetic film, a first auxiliary magnetic film and a magneto-optic recording film on a substrate. The auxiliary magnetic films change from in-plane magnetization to vertical magnetization at critical temperatures TCR1 and TCR2. Since they have the relation TCR1>TCR2, the magnetic domain transferred from the magneto-optic recording film to the first auxiliary magnetic film at the time of reproduction is expanded in diameter and is transferred to the second auxiliary magnetic film when the temperature profiles of the auxiliary magnetic films inside an optical spot are utilized. The magnetic domain of the magneto-optic recording film can be expanded and transferred, too, by means of magnetostatic coupling by using a non-magnetic film in place of the first auxiliary magnetic film. Pulse reproduction light subjected to power modulation in synchronism with a reproduction clock can be used at the time of reproduction. Even when a very small magnetic domain is recorded, the intensity of an amplified reproduction signal can be detected and excellent C/N can be obtained.

摘要翻译： 磁光记录介质包括在基板上的第二辅助磁膜，第一辅助磁膜和磁光记录膜。 在临界温度TCR1和TCR2下，辅助磁膜从面内磁化转变为垂直磁化。 由于它们具有关系TCR1> TCR2，所以在再现时从磁光记录膜转移到第一辅助磁性膜的磁畴的直径扩大并且当第二辅助磁性膜的温度分布 利用光点内的辅助磁膜。 磁光记录膜的磁畴也可以通过使用非磁性膜代替第一辅助磁性膜的静磁耦合来扩展和转移。 在再现时可以使用经受与再现时钟同步的功率调制的脉冲再现光。 即使记录非常小的磁畴，也可以检测出放大的再现信号的强度，可以获得优异的C / N。

公开(公告)号：US6061307A

公开(公告)日：2000-05-09

申请号：US737365

申请日：1996-11-08

申请人： Katsusuke Shimazaki ,  Masafumi Yoshihiro ,  Akito Sakemoto ,  Norio Ohta ,  Osamu Ishizaki ,  Satoru Ohnuki ,  Toshinori Sugiyama ,  Kazuko Ishitsuka

发明人： Katsusuke Shimazaki ,  Masafumi Yoshihiro ,  Akito Sakemoto ,  Norio Ohta ,  Osamu Ishizaki ,  Satoru Ohnuki ,  Toshinori Sugiyama ,  Kazuko Ishitsuka

IPC分类号： G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10515 ,  G11B11/10502 ,  G11B11/1051 ,  G11B11/10528 ,  G11B11/10534 ,  G11B11/10586 ,  G11B11/10508 ,  G11B11/10521 ,  G11B11/1053 ,  G11B11/10554 ,  G11B11/10595

摘要： On a surface of a transparent substrate 1 having a preformat pattern 2 formed thereon are laminated a first recording layer 4 in which a recording state exists in one different magnetic field region of an applied external magnetic field and a second recording layer 6 in which two recording states exist in magnetic field regions different from that for the first recording layer. As required, dielectric layers 3, 5 and 7, a reflecting layer 8 and a protection layer 9 can be laminated. The 4-valued recording of information becomes possible by assigning information signals "1", "0", "3" and "2" to H.sub.0, H.sub.1, H.sub.2 and H.sub.3, respectively.

摘要翻译： PCT No.PCT / JP95 / 00888 Sec。 371日期：1996年11月8日 102（e）日期1996年11月8日PCT提交1995年5月10日PCT公布。 公开号WO95 / 30986 日期：1995年11月16日在其上形成有预格式化图案2的透明基板1的表面上层叠有第一记录层4，其中记录状态存在于施加的外部磁场的一个不同的磁场区域中，第二记录层 6，其中两个记录状态存在于与第一记录层不同的磁场区域中。 根据需要，可以层压电介质层3,5和7，反射层8和保护层9。 分别向H0，H1，H2和H3分配信息信号“1”，“0”，“3”和“2”，信息的4值记录成为可能。

公开(公告)号：US06693854B2

公开(公告)日：2004-02-17

申请号：US10388397

申请日：2003-03-17

申请人： Katsusuke Shimazaki ,  Susumu Imai ,  Norio Ohta ,  Hiroyuki Awano ,  Masafumi Yoshihiro ,  Hitoshi Watanabe ,  Hiroki Takao

发明人： Katsusuke Shimazaki ,  Susumu Imai ,  Norio Ohta ,  Hiroyuki Awano ,  Masafumi Yoshihiro ,  Hitoshi Watanabe ,  Hiroki Takao

IPC分类号： G11B1100

CPC分类号： G11B11/10595 ,  G11B11/10513 ,  G11B11/10515 ,  G11B11/10528 ,  G11B11/10584 ,  G11B11/10593 ,  G11B20/00086 ,  G11B20/1217 ,  G11B2020/1275 ,  G11B2020/1298 ,  G11B2220/2525

摘要： External magnetic fields H(x) or reproducing light beams L(x) having different intensity patterns are applied to an identical recording position on a magneto-optical recording medium so that different pieces of information corresponding to the patterns are reproduced from the identical recording position. A function H(x) or L(x) is a password for obtaining the information. Only a person, who knows the function, can access specified information recorded on the magneto-optical recording medium. The function H(x) or L(x) is a function in which the magnetic field intensity or the light intensity is modulated with respect to the recording position x so that magnetic domains may be thinned out to perform reproduction at a specified cycle from continuous magnetic domains in a recording area. Other than the use for the purpose of security, reproduced C/N can be remarkably improved by performing reproduction n times while radiating a reproducing light beam PL/PH which is power-modulated so that the high power PH is applied at every cycle which is not less than n times the recording clock, to a specified magneto-optical recording medium capable of magnetic domain-magnifying reproduction.

摘要翻译： 具有不同强度图案的外部磁场H（x）或再现光束L（x）被施加到磁光记录介质上相同的记录位置，使得与图案对应的不同的信息从相同的记录位置再现 。 函数H（x）或L（x）是用于获取信息的密码。 知道该功能的人只能访问记录在磁光记录介质上的指定信息。 函数H（x）或L（x）是其中相对于记录位置x调制磁场强度或光强度的功能，使得磁畴可以被稀疏以在连续的指定周期进行再现 记录区域的磁畴。 除了用于安全性的用途之外，通过执行再现n次，可以显着提高再现的C / N，同时辐射被功率调制的再现光束PL / PH，使得在每个周期都应用高功率PH 不小于n倍的记录时钟，到能够进行磁畴放大再现的指定磁光记录介质。