公开(公告)号：US5691963A

公开(公告)日：1997-11-25

申请号：US744565

申请日：1996-11-06

申请人： Junji Hirokane ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

发明人： Junji Hirokane ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10515 ,  G11B11/10521 ,  G11B11/10591 ,  Y10S428/90 ,  Y10T428/12736 ,  Y10T428/12771 ,  Y10T428/12868 ,  Y10T428/12896 ,  Y10T428/12903 ,  Y10T428/1291 ,  Y10T428/12917 ,  Y10T428/12924 ,  Y10T428/12931 ,  Y10T428/12937 ,  Y10T428/26 ,  Y10T428/265

摘要： A magneto-optical recording medium including a base; a readout layer formed on the base; a recording layer formed on the readout layer; and an auxiliary recording layer formed on the recording layer, each of the readout layer, recording layer and auxiliary recording layer being made of an alloy of rare-earth metal and transition metal showing ferrimagnetism. The alloy composition of each layer is determined so that the recording layer has a Curie temperature lower than Curie temperatures of the readout layer and the auxiliary recording layer and has a coercive force higher than coercive forces of the readout layer and the auxiliary recording layer at room temperature and that, when the temperature of the recording layer is raised to near its Curie temperature while perpendicularly applying a uniform recording magnetic field to each layer, a sublattice magnetic moment of the rare-earth metal of the readout layer and a sublattice magnetic moment of the rare-earth metal of the auxiliary recording layer are antiparallel to each other. And, a method of recording information on the magneto-optical recording medium. This structure enables overwriting by light-intensity modulation without using an initializing magnetic field.

摘要翻译： 一种包括基底的磁光记录介质; 形成在基底上的读出层; 形成在读出层上的记录层; 以及形成在记录层上的辅助记录层，每个读出层，记录层和辅助记录层由稀土金属和过渡金属的合金制成，显示出铁磁性。 确定每层的合金组成，使得记录层的居里温度低于读出层和辅助记录层的居里温度，并且具有高于室内读出层和辅助记录层的矫顽力的矫顽力 并且当在每个层垂直地施加均匀的记录磁场的同时将记录层的温度升高到靠近其居里温度时，读出层的稀土金属的亚晶格磁矩和亚晶格磁矩 辅助记录层的稀土金属彼此反平行。 以及在磁光记录介质上记录信息的方法。 该结构能够通过光强度调制而不使用初始化磁场。

公开(公告)号：US5665467A

公开(公告)日：1997-09-09

申请号：US196978

申请日：1994-02-15

申请人： Junichiro Nakayama ,  Michinobu Mieda ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

发明人： Junichiro Nakayama ,  Michinobu Mieda ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B5/66

CPC分类号： G11B11/10586 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

摘要： A magneto-optical recording medium includes a first magnetic layer, a second magnetic layer and a third magnetic layer respectively made of rare-earth-transition metal alloys which are laminated in this order. The first magnetic layer has a perpendicular magnetization in a temperature range between room temperature and its Curie temperature. The second magnetic layer made of GdFeCo is set such that its Curie temperature is higher than the Curie temperature of the first magnetic layer, coercive force thereof at room temperature is nearly zero, and that it has an in-plane magnetization at room temperature and a transition occurs therein from the in-plane magnetization to the perpendicular magnetization at above a predetermined temperature. The third magnetic layer is set such that it has a perpendicular magnetization in a temperature range of room temperature and its Curie temperature, its Curie temperature is higher than the Curie temperature of the first magnetic layer, and coercive force thereof at room temperature is smaller than the coercive force of the first magnetic layer.

摘要翻译： 磁光记录介质包括依次层叠的分别由稀土 - 过渡金属合金制成的第一磁性层，第二磁性层和第三磁性层。 第一磁性层在室温和居里温度之间的温度范围内具有垂直磁化强度。 由GdFeCo制成的第二磁性层的居里温度设定为高于第一磁性层的居里温度，室温下的矫顽力接近零，在室温下具有面内磁化强度， 在从预定温度以上的面内磁化强度向垂直磁化发生。 第三磁性层被设定为使其在室温的温度范围内具有垂直磁化强度和居里温度，居里温度高于第一磁性层的居里温度，室温下的矫顽力小于 第一磁性层的矫顽力。

公开(公告)号：US5648162A

公开(公告)日：1997-07-15

申请号：US177096

申请日：1993-12-30

申请人： Junji Hirokane ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

发明人： Junji Hirokane ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B5/66

CPC分类号： G11B11/10515 ,  G11B11/10521 ,  G11B11/10591 ,  Y10S428/90 ,  Y10T428/12736 ,  Y10T428/12771 ,  Y10T428/12868 ,  Y10T428/12896 ,  Y10T428/12903 ,  Y10T428/1291 ,  Y10T428/12917 ,  Y10T428/12924 ,  Y10T428/12931 ,  Y10T428/12937 ,  Y10T428/26 ,  Y10T428/265

摘要： A magneto-optical recording medium including a base; a readout layer formed on the base; a recording layer formed on the readout layer; and an auxiliary recording layer formed on the recording layer, each of the readout layer, recording layer and auxiliary recording layer being made of an alloy of rare-earth metal and transition metal showing ferrimagnetism. The alloy composition of each layer is determined so that the recording layer has a Curie temperature lower than Curie temperatures of the readout layer and the auxiliary recording layer and has a coercive force higher than coercive forces of the readout layer and the auxiliary recording layer at room temperature and that, when the temperature of the recording layer is raised to near its Curie temperature while perpendicularly applying a uniform recording magnetic field to each layer, a sublattice magnetic moment of the rare-earth metal of the readout layer and a sublattice magnetic moment of the rare-earth metal of the auxiliary recording layer are antiparallel to each other. And, a method of recording information on the magneto-optical recording medium. This structure enables overwriting by light-intensity modulation without using an initializing magnetic field.

摘要翻译： 一种包括基底的磁光记录介质; 形成在基底上的读出层; 形成在读出层上的记录层; 以及形成在记录层上的辅助记录层，每个读出层，记录层和辅助记录层由稀土金属和过渡金属的合金制成，显示出铁磁性。 确定每层的合金组成，使得记录层的居里温度低于读出层和辅助记录层的居里温度，并且具有高于室内读出层和辅助记录层的矫顽力的矫顽力 并且当在每个层垂直地施加均匀的记录磁场的同时将记录层的温度升高到靠近其居里温度时，读出层的稀土金属的亚晶格磁矩和亚晶格磁矩 辅助记录层的稀土金属彼此反平行。 以及在磁光记录介质上记录信息的方法。 该结构能够通过光强度调制而不使用初始化磁场。

公开(公告)号：US5615180A

公开(公告)日：1997-03-25

申请号：US198620

申请日：1994-02-18

申请人： Michinobu Mieda ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

发明人： Michinobu Mieda ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10586 ,  G11B11/10534 ,  G11B11/10506 ,  G11B11/10519 ,  G11B11/10523

摘要： A magneto-optical disk is provided with a recording layer that exhibits perpendicular magnetization, an intermediate layer wherein in-plane magnetization occurs at room temperature and a transition from the in-plane magnetization to perpendicular magnetization occurs as the temperature thereof rises, and an auxiliary layer that is made of a rare-earth-transition-metal alloy and that exhibits perpendicular magnetization, and these layers are laminated in this order. The composition of the rare-earth-transition-metal alloy is set so that the magnetic moment of the rare-earth metal is relatively greater than that of the transition metal at room temperature and the compensation temperature is located between room temperature and the Curie temperature T.sub.c3. A magneto-optical recording apparatus for rewriting information on the magneto-optical disk is provided with a single magnet for applying H.sub.w onto a portion on the magneto-optical disk irradiated by a light beam, as well as for applying H.sub.init having a greater intensity than H.sub.w onto a portion that is apart from the portion irradiated by the light beam. This arrangement makes it possible to achieve a more compact, thinner magneto-optical recording apparatus which allows light-modulation overwriting.

摘要翻译： 磁光盘设置有表现出垂直磁化的记录层，其中在室温下发生面内磁化的中间层，并且随着其温度升高而发生从平面内磁化到垂直磁化的转变，辅助 层，其由稀土 - 过渡金属合金制成并且呈现垂直磁化，并且这些层依次层压。 设定稀土 - 过渡金属合金的组成使得稀土金属的磁矩在室温下比过渡金属的磁矩更大，并且补偿温度位于室温和居里温度之间 Tc3。 用于在磁光盘上重写信息的磁光记录装置设置有用于将Hw施加到由光束照射的磁光盘上的部分上的单个磁体，以及用于施加具有比光束更大的强度的Hinit Hw到与光束照射的部分分开的部分。 这种布置使得可以实现允许光调制重写的更紧凑，更薄的磁光记录装置。

公开(公告)号：US5335220A

公开(公告)日：1994-08-02

申请号：US821361

申请日：1992-01-16

申请人： Kenji Ohta ,  Tetsuya Inui ,  Hiroyuki Katayama ,  Akira Takahashi ,  Junji Hirokane ,  Yukinori Nishitani ,  Michinobu Mieda ,  Kazuo Van

发明人： Kenji Ohta ,  Tetsuya Inui ,  Hiroyuki Katayama ,  Akira Takahashi ,  Junji Hirokane ,  Yukinori Nishitani ,  Michinobu Mieda ,  Kazuo Van

IPC分类号： G11B7/0045 ,  G11B7/013 ,  G11B7/09 ,  G11B7/125 ,  G11B7/24 ,  G11B7/24085 ,  G11B11/105 ,  G11B19/02 ,  G11B3/78

CPC分类号： G11B7/0045 ,  G11B11/10528 ,  G11B11/10578 ,  G11B11/10595 ,  G11B19/02 ,  G11B7/0938 ,  G11B7/126 ,  G11B7/24 ,  G11B7/24085

摘要： An optical recording element comprising a recording medium which includes an information recording area formed at every unit in a non-continuous condition, the recording medium further including sample pits disposed at intervals of a fixed distance for providing basic information about the locations of the recording units in same track. Each sample pit comprises a plurality of pits disposed next to the sequence of the recording units so that the spacing between the pits differs from the spacing between the recording units. At least one of the plurality of pits is a long-sized inclined pit which is inclined at an angle in the range of 6.degree. to 80.degree. to a recording track. A driving system for driving the optical recording element for recording information in the non-continuous recording area or erasing information stored therein with a light beam the output of which is varied as required and checking whether said recording or erasing has been correctly performed, within a very short time in which the light beam passes through the non-continuous recording area. By using the optical recording element in combination with its driving system, the processing speed for reducing, erasing and verifying these functions can be greatly improved and the irradiating position of the light beam at every recording unit can be correctly controlled.

摘要翻译： 一种光记录元件，包括记录介质，该记录介质包括在非连续状态下在每个单元处形成的信息记录区域，所述记录介质还包括以固定距离间隔设置的样品坑，以提供关于记录单元的位置的基本信息 在同一轨道。 每个采样坑包括靠近记录单元序列设置的多个凹坑，使得凹坑之间的间隔与记录单元之间的间隔不同。 多个凹坑中的至少一个是相对于记录轨道以6°至80°的角度倾斜的长尺寸倾斜凹坑。 一种驱动系统，用于驱动用于在非连续记录区域中记录信息的光学记录元件，或者用存储在其中的光束擦除信息，该光束的输出根据需要变化，并且检查是否正确地执行了所述记录或擦除 光束通过非连续记录区域的非常短的时间。 通过与其驱动系统结合使用光学记录元件，可以大大提高用于减少，擦除和验证这些功能的处理速度，并且可以正确地控制每个记录单元处的光束的照射位置。

公开(公告)号：US5193082A

公开(公告)日：1993-03-09

申请号：US502104

申请日：1990-03-29

申请人： Tomoyuki Miyake ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

发明人： Tomoyuki Miyake ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B11/10 ,  G11B5/02 ,  G11B5/127 ,  G11B7/12 ,  G11B7/135 ,  G11B11/105

CPC分类号： G11B7/1353 ,  G11B11/10532 ,  G11B11/10536 ,  G11B11/10554 ,  G11B7/124 ,  G11B11/1058 ,  G11B2007/13722

摘要： A photomagnetic composite head comprising a magnetic head and an optical head that are integrated into one unit, an optical waveguide path of the optical head being located in the surface of the magnetic head that faces a recording medium, and a laser beam that passes through the optical waveguide path being irradiated on a point on the recording medium where a magnetic field is impressed from the magnetic head, whereby recording can be performed under a condition in which the coercivity of the recording medium has been lowered by the laser beam, thus making it possible to achieve high density recording by using a recording medium with a high coercivity.

公开(公告)号：US4764441A

公开(公告)日：1988-08-16

申请号：US930157

申请日：1986-11-12

申请人： Kenji Ohta ,  Junji Hirokane ,  Tetsuya Inui ,  Akira Takahashi ,  Hiroyuki Katayama

发明人： Kenji Ohta ,  Junji Hirokane ,  Tetsuya Inui ,  Akira Takahashi ,  Hiroyuki Katayama

IPC分类号： G03F1/00 ,  G03F1/38 ,  G03F1/58 ,  G03F9/00

CPC分类号： G03F1/58 ,  G03F1/38 ,  G03F1/50

摘要： A photo-mask which is used for the production of a substrate for an optical memory element includes a reflective film formed over an ultraviolet non-transmissive film on a substrate. Alternatively, a multi-layer dielectric film which is not transmissive to light of wavelength about 400 nm but transmissive to light of wavelength about 450 nm is formed on a substrate.

摘要翻译： 用于制造光存储元件用基板的光掩模包括在基板上的紫外线不透光膜上形成的反射膜。 或者，在基板上形成不透射波长约400nm但对波长约450nm的光透射的多层电介质膜。

公开(公告)号：US5674583A

公开(公告)日：1997-10-07

申请号：US461164

申请日：1995-06-05

申请人： Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta ,  Kazuo Van

发明人： Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta ,  Kazuo Van

IPC分类号： G11B5/00 ,  G11B7/003 ,  G11B7/004 ,  G11B7/007 ,  G11B7/24 ,  G11B7/26 ,  G11B11/105 ,  G11B13/00 ,  G11B13/04 ,  G11B20/00 ,  G11B23/28 ,  G11B5/66

CPC分类号： G11B23/281 ,  G11B11/10582 ,  G11B13/00 ,  G11B13/04 ,  G11B13/045 ,  G11B23/28 ,  G11B5/00 ,  G11B7/0031 ,  G11B7/24 ,  G11B7/26 ,  G11B11/10502 ,  G11B20/00086 ,  G11B7/004 ,  G11B7/007 ,  Y10S428/90 ,  Y10T428/265

摘要： An optical tape including an optical recording layer for permitting information to be optically recorded thereon and a light-reflective magnetic layer; the light-reflective magnetic layer which reflects light projected onto the recording layer, also permits magnetic recording or magneto-optical recording to be performed thereon, thereby increasing a storage capacity of the optical tape remarkably; further, the optical tape is provided with a layer to form guiding grooves for tracking control, which layer to form guiding grooves is made up of ultraviolet-hardening resin, photo-resist, or a photochromic material.

摘要翻译： 一种光学带，包括用于允许光学记录信息的光学记录层和光反射性磁性层; 反映投影到记录层上的光的光反射性的磁性层也可以在其上进行磁记录或磁光记录，从而显着地增加了光带的存储容量。 此外，光带设置有层以形成用于跟踪控制的引导槽，其中形成导向槽的层由紫外线硬化树脂，光致抗蚀剂或光致变色材料构成。

公开(公告)号：US5600627A

公开(公告)日：1997-02-04

申请号：US340333

申请日：1994-11-14

申请人： Junji Hirokane ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

发明人： Junji Hirokane ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B7/007 ,  G11B7/013 ,  G11B7/14 ,  G11B13/04

CPC分类号： G11B7/00745 ,  G11B7/14 ,  G11B7/24079 ,  G11B7/24085

摘要： The method of the present invention is for recording, reproducing, and deleting information on and from an optical disk including a plurality of tracks each having M guide grooves (M is an integer equal to or larger than 2) and M-1 land(s) interposed between the adjacent guide grooves, at least one of the land(s) having a group of pits for producing address information. The method includes the step of: focusing light beams on the respective guide grooves and land(s) for effecting the recording, reproduction, and deletion of information. Such an optical disk is also provided.

摘要翻译： 本发明的方法是用于在包括M个导槽（M为2以上的整数）的多个轨道的光盘上记录，再现和删除信息，M-1个地面 ）插入在相邻引导槽之间，至少一个具有一组凹坑的区域用于产生地址信息。 该方法包括以下步骤：将光束聚焦在各个引导槽和岸台上，以进行信息的记录，再现和删除。 还提供了这种光盘。

公开(公告)号：US5459711A

公开(公告)日：1995-10-17

申请号：US219253

申请日：1994-03-29

申请人： Kenji Ohta ,  Tetsuya Inui ,  Hiroyuki Katayama ,  Akira Takahashi ,  Junji Hirokane ,  Yukinori Nishitani ,  Michinobu Mieda ,  Kazuo Van

发明人： Kenji Ohta ,  Tetsuya Inui ,  Hiroyuki Katayama ,  Akira Takahashi ,  Junji Hirokane ,  Yukinori Nishitani ,  Michinobu Mieda ,  Kazuo Van

IPC分类号： G11B7/0045 ,  G11B7/013 ,  G11B7/09 ,  G11B7/125 ,  G11B7/24 ,  G11B7/24085 ,  G11B11/105 ,  G11B19/02 ,  G11B3/78

CPC分类号： G11B7/0045 ,  G11B11/10528 ,  G11B11/10578 ,  G11B11/10595 ,  G11B19/02 ,  G11B7/0938 ,  G11B7/126 ,  G11B7/24 ,  G11B7/24085

摘要： An optical recording element comprising a recording medium which includes an information recording area formed at every unit in a non-continuous condition, the recording medium further including sample pits disposed at intervals of a fixed distance for providing basic information about the locations of the recording units in same track. Each sample pit comprises a plurality of pits disposed next to the sequence of the recording units so that the spacing between the pits differs from the spacing between the recording units. At least one of the plurality of pits is a long-sized inclined pit which is inclined at an angle in the range of 6.degree. to 80.degree. to a recording track. A driving system for driving the optical recording element for recording information in the non-continuous recording area or erasing information stored therein with a light beam the output of which is varied as required and checking whether said recording or erasing has been correctly performed, within a very short time in which the light beam passes through the non-continuous recording area. By using the optical recording element in combination with its driving system, the processing speed for reducing, erasing and verifying these functions can be greatly improved and the irradiating position of the light beam at every recording unit can be correctly controlled.

摘要翻译： 一种光记录元件，包括记录介质，该记录介质包括在非连续状态下在每个单元处形成的信息记录区域，所述记录介质还包括以固定距离间隔设置的样品坑，以提供关于记录单元的位置的基本信息 在同一轨道。 每个采样坑包括靠近记录单元序列设置的多个凹坑，使得凹坑之间的间隔与记录单元之间的间隔不同。 多个凹坑中的至少一个是相对于记录轨道以6°至80°的角度倾斜的长尺寸倾斜凹坑。 一种驱动系统，用于驱动用于在非连续记录区域中记录信息的光学记录元件，或者用存储在其中的光束擦除信息，该光束的输出根据需要变化，并且检查是否正确地执行了所述记录或擦除 光束通过非连续记录区域的非常短的时间。 通过与其驱动系统结合使用光学记录元件，可以大大提高用于减少，擦除和验证这些功能的处理速度，并且可以正确地控制每个记录单元处的光束的照射位置。