公开(公告)号：US07352658B2

公开(公告)日：2008-04-01

申请号：US10381315

申请日：2001-02-07

申请人： Katsusuke Shimazaki ,  Norio Ohta ,  Fumiyoshi Kirino

发明人： Katsusuke Shimazaki ,  Norio Ohta ,  Fumiyoshi Kirino

IPC分类号： G11B11/00

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/3909 ,  G11B5/3954 ,  G11B5/4886 ,  G11B5/66 ,  G11B5/74 ,  G11B5/82 ,  G11B5/86 ,  G11B11/10504 ,  G11B11/10554 ,  G11B11/1058 ,  G11B11/10584 ,  G11B11/10591 ,  G11B2005/0005 ,  G11B2005/001 ,  G11B2005/0021 ,  G11B2005/3996

摘要： A magnetic recording medium comprises a first magnetic film and a second magnetic film on a substrate. The second magnetic film is composed of a magnetic material preferred for recording and reproduction, and the first magnetic film is composed of a ferrimagnetic material excellent in thermal stability. Information is recorded in the second magnetic film by using a magnetic head. The first magnetic film is heated by being irradiated with a laser beam to lower coercivity, and the information in the second magnetic film is magnetically transferred to the first magnetic film. The recorded information is stabilized, because the first magnetic film is excellent in thermal stability. The magnetic recording medium is highly resistant to thermal fluctuation, and it has high reliability. A magnetic domain of about 0.1 μm, formed by magnetic recording at a super high density of 50 Gb/inch2, is successfully and stably allowed to exist.

摘要翻译： 磁记录介质包括在基板上的第一磁性膜和第二磁性膜。 第二磁性膜由优选用于记录和再现的磁性材料组成，第一磁性膜由热稳定性优异的亚铁磁性材料构成。 通过使用磁头将信息记录在第二磁性膜中。 通过用激光束照射第一磁性膜以降低矫顽力，并且将第二磁性膜中的信息磁性转移到第一磁性膜。 记录信息稳定，因为第一磁性膜的热稳定性优异。 磁记录介质对热波动具有很高的抵抗力，可靠性高。 通过以50Gb /英寸2的超高密度的磁记录形成的大约0.1μm的磁畴被成功且稳定地存在。

公开(公告)号：US5321672A

公开(公告)日：1994-06-14

申请号：US509754

申请日：1990-04-17

申请人： Harukazu Miyamoto ,  Yoshio Suzuki ,  Toshio Niihara ,  Norio Ohta ,  Masahiko Takahashi ,  Fumiyoshi Kirino ,  Yumiko Anzai

发明人： Harukazu Miyamoto ,  Yoshio Suzuki ,  Toshio Niihara ,  Norio Ohta ,  Masahiko Takahashi ,  Fumiyoshi Kirino ,  Yumiko Anzai

IPC分类号： G11B11/105 ,  G11B13/04

CPC分类号： G11B11/10528 ,  G11B11/10504 ,  G11B11/10517

摘要： A magneto-optical recording device for radiating a laser beam according to recording information onto a magneto-optical recording medium having an easy axis of magnetization in a direction perpendicular to a film face of the recording medium itself to form a reversed domain and record information, which forms a reversed domain by radiating a laser beam and moves the position of the reversed domain to record information. In an embodiment of the present invention, it becomes possible to over-write new information without erasing beforehand information already recorded by only controlling the intensity, pulse width, radiation position and radiation time of the laser beam without providing a special bias magnetic field for reversing the magnetic field.

摘要翻译： 一种磁光记录装置，用于根据记录信息将激光束照射到具有易磁化轴的磁光记录介质上，该光磁记录介质在与记录介质本身的膜面垂直的方向上形成反向畴并记录信息， 其通过辐射激光束并且将反向域的位置移动以记录信息而形成反向域。 在本发明的一个实施例中，可以不预先擦除已经通过仅控制激光束的强度，脉冲宽度，辐射位置和辐射时间的信号的新信息而不提供用于反转的特殊偏置磁场 磁场。

公开(公告)号：US5315577A

公开(公告)日：1994-05-24

申请号：US846883

申请日：1992-03-06

申请人： Fumiyoshi Kirino ,  Junko Nakamura ,  Ryo Suzuki ,  Masafumi Yoshihiro ,  Yukinori Yamada ,  Norio Ohta

发明人： Fumiyoshi Kirino ,  Junko Nakamura ,  Ryo Suzuki ,  Masafumi Yoshihiro ,  Yukinori Yamada ,  Norio Ohta

IPC分类号： G11B5/02 ,  G11B7/007 ,  G11B11/10 ,  G11B11/105 ,  G11B11/14 ,  G11B7/125

CPC分类号： G11B11/10597 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10586

摘要： An optical recording/ reproducing method which is characterized by irradiating a magnetic material having a perpendicular anisotropy with a laser beam to cause a change in the perpendicular anisotropy in the magnetic material to a non-perpendicular anisotropy thereby to record information; and by reproducing the information by detecting a change in a magneto-optic effect such as the Kerr effect. Also disclosed are an optical recording material and an optical recording device for use in the optical recording/reproducing method.

摘要翻译： 一种光学记录/再现方法，其特征在于用激光束照射具有垂直各向异性的磁性材料，以使磁性材料中的垂直各向异性变化为非垂直各向异性从而记录信息; 并且通过检测诸如克尔效应的磁光效应的变化来再现信息。 还公开了用于光学记录/再现方法的光学记录材料和光学记录装置。

公开(公告)号：US06893746B1

公开(公告)日：2005-05-17

申请号：US10111608

申请日：2000-10-30

申请人： Fumiyoshi Kirino ,  Norio Ohta ,  Kouichirou Wakabayashi ,  Teruaki Takeuchi ,  Harumi Hieida ,  Masaki Sekine ,  Hiroyuki Awano ,  Akira Yano ,  Satoshi Matsunuma ,  Nobuyuki Inaba ,  Tetsunori Koda

发明人： Fumiyoshi Kirino ,  Norio Ohta ,  Kouichirou Wakabayashi ,  Teruaki Takeuchi ,  Harumi Hieida ,  Masaki Sekine ,  Hiroyuki Awano ,  Akira Yano ,  Satoshi Matsunuma ,  Nobuyuki Inaba ,  Tetsunori Koda

IPC分类号： G11B5/00 ,  G11B5/64 ,  G11B5/66 ,  G11B5/74 ,  G11B5/82 ,  G11B5/70 ,  G11B11/105

CPC分类号： G11B5/65 ,  G11B5/00 ,  G11B5/656 ,  G11B5/66 ,  G11B5/667 ,  G11B5/7325 ,  G11B5/74 ,  G11B5/82 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0021

摘要： A magnetic recording medium comprises an information-recording film and a ferromagnetic film on a substrate. The information-recording film is composed of, for example, an amorphous ferrimagnetic material having perpendicular magnetization. Further, the ferromagnetic film is composed of a magnetic material which has saturation magnetization larger than that of the information-recording film. Accordingly, the leak magnetic flux from the ferromagnetic film is larger than that from the information-recording film. The magnetic recording medium and a magnetic recording apparatus are obtained, which are excellent in thermal stability and which are preferred to perform super high density recording.

摘要翻译： 磁记录介质包括在基板上的信息记录膜和铁磁膜。 信息记录膜由例如具有垂直磁化的非晶铁磁材料构成。 此外，铁磁膜由具有比信息记录膜的饱和磁化强度大的饱和磁化强度的磁性材料构成。 因此，来自铁磁膜的泄漏磁通量大于来自信息记录膜的漏磁通量。 获得磁性记录介质和磁记录装置，其热稳定性优异，并且优选进行超高密度记录。

公开(公告)号：US5814400A

公开(公告)日：1998-09-29

申请号：US702936

申请日：1991-05-20

申请人： Fumiyoshi Kirino ,  Yoshinori Miyamura ,  Junko Nakamura ,  Norio Ohta ,  Masahiko Takahashi ,  Ryo Suzuki

发明人： Fumiyoshi Kirino ,  Yoshinori Miyamura ,  Junko Nakamura ,  Norio Ohta ,  Masahiko Takahashi ,  Ryo Suzuki

IPC分类号： G11B11/105 ,  G11B5/66

CPC分类号： G11B11/10584 ,  G11B11/10586 ,  Y10S428/90 ,  Y10T428/12493 ,  Y10T428/12806 ,  Y10T428/12861 ,  Y10T428/12875 ,  Y10T428/12931 ,  Y10T428/12937 ,  Y10T428/26 ,  Y10T428/265

摘要： A magneto-optical recording medium comprises in combination: a magneto-optical recording layer capable of writing or erasing information by a laser beam and an external magnetic field and of reading the information by a Kerr effect; and a substrate having the magneto-optical recording layer formed thereon. The magneto-optical recording layer has at least two layers, including a first magneto-optical recording layer and a second magneto-optical recording layer which are magnetically coupled together. The first magneto-optical recording layer is a layer providing a greater magneto-optical effect in a short light wavelength range than the second magneto-optical recording layer though that having less perpendicular magnetic energy than this, as is provided on an irradiation side of the laser beam. It provides advantages in both the magneto-optical effect and perpendicular anisotropy in consideration of the thicknesses or compositions of the first and second magneto-optical recording layers.

摘要翻译： 一种磁光记录介质，其特征在于包括：能够通过激光束和外部磁场写入或擦除信息并通过克尔效应读取信息的磁光记录层; 以及在其上形成有磁光记录层的基板。 磁光记录层具有至少两层，包括磁耦合在一起的第一磁光记录层和第二磁光记录层。 第一磁光记录层是在比第二磁光记录层更短的光波长范围内提供比这更小的垂直磁能的磁光效应的层，如在第二磁光记录层的照射侧 激光束。 考虑到第一和第二磁光记录层的厚度或组成，它在磁光效应和垂直各向异性两方面都具有优势。

公开(公告)号：US5654058A

公开(公告)日：1997-08-05

申请号：US310006

申请日：1994-09-21

申请人： Fumiyoshi Kirino ,  Harukazu Miyamoto ,  Shigenori Okamine ,  Noriyuki Ogihara ,  Masahiko Takahashi ,  Norio Ohta ,  Toshio Niihara

发明人： Fumiyoshi Kirino ,  Harukazu Miyamoto ,  Shigenori Okamine ,  Noriyuki Ogihara ,  Masahiko Takahashi ,  Norio Ohta ,  Toshio Niihara

IPC分类号： G11B11/105 ,  G11B5/66

CPC分类号： G11B11/1053 ,  G11B11/10586 ,  G11B11/10589 ,  G11B11/10591 ,  G11B11/10593 ,  G11B11/10508 ,  G11B11/10519 ,  Y10S428/90

摘要： In a magneto-optical disk for recording, reproduction or erasing with a laser beam, which comprises a film of four-layer structure consisting of a first dielectric layer, a magneto-optical recording layer, a second dielectric layer and a metallic layer, laid on a disk substrate provided with guide tracks, temperature distribution of the magneto-optical recording layer is controlled by controlling the thermal diffusivity of the metallic layer, and recording/reproduction/erasing repetition characteristics are improved thereby. In the disk of the present structure, the temperature is elevated in a broader area from the center of laser beam, and thus a thoroughly broad erasing domain width taking a track offset into account can be obtained and no recording domains remain after the erasing. The reproduced signal output is increased by 4 dB, as compared with that obtained by a disk of three-layer structure without any metallic layer, because the beam utilization efficiency is increased owing to both Kerr effect and Faraday effect. When the disk of the present structure is subjected to field modulation recording, tails of arrow-feather-shaped recording domains peculiar to the field modulation recording can be shortened and interbit interferences can be overcome, resulting in an increase in C/N (S/N) ratio and the high density recording can be made.

摘要翻译： 在用于用激光束记录，再现或擦除的磁光盘中，其包括由第一介电层，磁光记录层，第二电介质层和金属层组成的四层结构的膜，铺设 在设置有导轨的盘基板上，通过控制金属层的热扩散率来控制磁光记录层的温度分布，从而提高记录/再现/擦除重复特性。 在本结构的盘中，从激光束的中心向较高的区域升温，从而可以获得考虑到磁道偏移的完全宽的擦除域宽度，并且在擦除之后不会留下记录域。 与没有任何金属层的三层结构的盘相比，再现信号输出增加了4dB，因为由于克尔效应和法拉第效应都增加了光束利用效率。 当本结构的磁盘进行现场调制记录时，可以缩短磁场调制记录特有的箭头 - 羽状记录区的尾部，并克服间断干扰，导致C / N（S / N）比，并且可以进行高密度记录。

公开(公告)号：US5270987A

公开(公告)日：1993-12-14

申请号：US509743

申请日：1990-04-17

申请人： Toshimitsu Kaku ,  Shigeru Nakamura ,  Masahiko Takahashi ,  Toshio Niihara ,  Harukazu Miyamoto ,  Norio Ohta ,  Takeshi Nakao ,  Hirofumi Sukeda ,  Masahiro Ojima ,  Takashi Toyooka ,  Tsuneo Suganuma ,  Fumiyoshi Kirino ,  Yoshinori Miyamura

发明人： Toshimitsu Kaku ,  Shigeru Nakamura ,  Masahiko Takahashi ,  Toshio Niihara ,  Harukazu Miyamoto ,  Norio Ohta ,  Takeshi Nakao ,  Hirofumi Sukeda ,  Masahiro Ojima ,  Takashi Toyooka ,  Tsuneo Suganuma ,  Fumiyoshi Kirino ,  Yoshinori Miyamura

IPC分类号： G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10584 ,  G11B11/10536 ,  G11B11/10545 ,  G11B11/10552 ,  G11B11/10558 ,  G11B11/10593 ,  G11B11/10571

摘要： A magnetic field of a polarity corresponding to information to be recorded is applied while a recording spot having a high energy is irradiated to a magneto-optical recording medium to record domains representing the information along a track. The recorded domains are read out by a reproducing spot having a lower energy than the recording spot and a high resolution power along the track. A recording head has an optical system for irradiating the recording spot having the high energy to the magneto-optical recording medium and a magnetic head for applying a magnetic field having a polarity thereof switched in accordance with the information to be recorded, to an irradiation area of the recording spot, a reproducing head has an optical system for irradiating the reproducing spot having the low energy by a laser beam having a wavelength of no larger than 600 nm and a magneto-optical signal detector for detecting a displacement of a polarization plane of a reflected light of the reproducing spot to read out the recording domains. The magneto-optical recording medium is made of a recording film having a multi-layer structure of alternate lamination of metal layers and dielectric layers.

摘要翻译： 将具有高能量的记录点照射到磁光记录介质上，记录与记录信息对应的极性的磁场，记录表示信息沿着轨迹的域。 记录的区域由具有比记录点更低的能量的再现点和沿着轨道的高分辨率电力读出。 记录头具有用于向磁光记录介质照射具有高能量的记录点的光学系统和用于根据要记录的信息将其极性切换的磁场施加到照射区域 的记录点，再现头具有用于通过具有不大于600nm的波长的激光束照射具有低能量的再现点的光学系统和用于检测偏振面的位移的磁光信号检测器 再现点的反射光读出记录区域。 磁光记录介质由具有金属层和电介质层的交替叠层的多层结构的记录膜制成。

公开(公告)号：US5914198A

公开(公告)日：1999-06-22

申请号：US831262

申请日：1997-04-07

申请人： Harukazu Miyamoto ,  Toshio Niihara ,  Norio Ohta ,  Fumiyoshi Kirino

发明人： Harukazu Miyamoto ,  Toshio Niihara ,  Norio Ohta ,  Fumiyoshi Kirino

IPC分类号： G11B11/105 ,  G11B5/66

CPC分类号： G11B11/10593 ,  G11B11/10584 ,  Y10S428/90

摘要： In a magneto-optical recording medium which comprises a transparent substrate, a first dielectric film, a magnetic film, a second dielectric film and a metal reflective film, formed successively one upon another, Kerr rotation angle can be increased without lowering the reflectivity by setting the thickness of the first dielectric film to 120-220% of a minimum film thickness among film thicknesses showing a minimum reflectivity and setting the thickness of the second dielectric film to 80-120% of a film thickness showing a maximum Kerr rotation angle and furthermore by making the refractive index of the first dielectric film lower than that of the second dielectric film.

摘要翻译： 在包括透明基板的磁光记录介质中，可以相互依次形成的第一电介质膜，磁膜，第二电介质膜和金属反射膜，可以增加克尔旋转角度，而不会通过设定降低反射率 第一电介质膜的厚度为薄膜厚度的最小膜厚的120-220％，表示最小的反射率，并将第二电介质膜的厚度设定为显示最大克尔旋转角度的膜厚度的80-120％ 通过使第一电介质膜的折射率低于第二电介质膜的折射率。

公开(公告)号：US07050253B2

公开(公告)日：2006-05-23

申请号：US10404071

申请日：2003-04-02

申请人： Tetsuya Kanbe ,  Ichiro Tamai ,  Yuzuru Hosoe ,  Kiwamu Tanahashi ,  Yoshio Takahashi ,  Fumiyoshi Kirino ,  Nagatugu Koiso ,  Satoshi Matsunuma

发明人： Tetsuya Kanbe ,  Ichiro Tamai ,  Yuzuru Hosoe ,  Kiwamu Tanahashi ,  Yoshio Takahashi ,  Fumiyoshi Kirino ,  Nagatugu Koiso ,  Satoshi Matsunuma

IPC分类号： G11B5/02

CPC分类号： G11B5/7325 ,  C23C14/185 ,  G11B5/00 ,  G11B5/012 ,  G11B2005/001 ,  G11B2005/0016 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/1107 ,  Y10T428/1121 ,  Y10T428/12507 ,  Y10T428/1266 ,  Y10T428/12667 ,  Y10T428/12674 ,  Y10T428/12819 ,  Y10T428/12826 ,  Y10T428/12868 ,  Y10T428/12944 ,  Y10T428/265

摘要： In a magnetic storage apparatus having a magnetic recording medium, a drive unit for driving this medium in a prespecified recording direction, a magnetic head assembly including a recorder section and reproduction section, means for causing the magnetic head to move relatively with respect to the magnetic record medium, and a record/playback signal processor means for performing signal inputting to the magnetic head and for effecting reproduction of an output signal from the magnetic head, the reproduction section of said magnetic head is composed of a magnetic head of the magnetoresistance effect type, while said magnetic record medium is structured including a substrate and a magnetic layer formed thereover with one or several underlayers being sandwiched therebetween, wherein at least one of the underlayers is a specific layer that is made of amorphous or microcrystalline materials containing therein Ni as the principal or main component thereof and further containing at least one kind of element as selected from the group consisting of Nb and Ta.

公开(公告)号：US06472047B1

公开(公告)日：2002-10-29

申请号：US09604633

申请日：2000-06-27

申请人： Fumiyoshi Kirino ,  Nobuyuki Inaba ,  Hiroki Yamamoto ,  Ken Takahashi ,  Takashi Naitou ,  Motoyasu Terao ,  Sumio Hosaka ,  Eiji Koyama ,  Hiroki Kuramoto

发明人： Fumiyoshi Kirino ,  Nobuyuki Inaba ,  Hiroki Yamamoto ,  Ken Takahashi ,  Takashi Naitou ,  Motoyasu Terao ,  Sumio Hosaka ,  Eiji Koyama ,  Hiroki Kuramoto

IPC分类号： G11B5738

CPC分类号： G11B5/7325 ,  G11B5/855 ,  Y10T428/24355 ,  Y10T428/24942 ,  Y10T428/25 ,  Y10T428/265 ,  Y10T428/31

摘要： The magnetic recording medium includes an underlayer 12 formed of an inorganic compound layer, and a magnetic layer 13 formed over the underlayer 12. The inorganic compound layer as the underlayer 12 has crystal grains and at least one kind of oxide, the crystal grains having as main elements at least one of cobalt oxide, chromium oxide, iron oxide and nickel oxide, the at least one kind of oxide lying as a non-crystalline phase in grain boundaries between the crystal grains and selected from among silicon oxide, aluminum oxide, titanium oxide, tantalum oxide and zinc oxide.

摘要翻译： 磁记录介质包括由无机化合物层形成的底层12和形成在底层12上的磁性层13.作为底层12的无机化合物层具有晶粒和至少一种氧化物，晶粒具有如 主要元素是氧化钴，氧化铬，氧化铁和氧化镍中的至少一种，所述至少一种氧化物在所述晶粒之间的晶界中位于非晶相中，并且选自氧化硅，氧化铝，钛 氧化物，氧化钽和氧化锌。