公开(公告)号：US08154823B2

公开(公告)日：2012-04-10

申请号：US12486014

申请日：2009-06-17

Applicant: Hideki Saga ,  Masaki Nagashima

Inventor： Hideki Saga ,  Masaki Nagashima

IPC: G11B5/596

CPC classification number: G11B5/5552 ,  G11B5/596

Abstract: An information recording and reproducing apparatus 1 having a high efficiency of information transfer includes one or more recording media forming a plurality of recording surfaces, a plurality of heads respectively disposed on the recording surfaces, a first actuator for supporting the heads and moving the heads uniformly, a plurality of second actuators provided one for an associated one of the heads, the second actuators moving the heads independently relative to the first actuator, recording processing circuits for simultaneously outputting recording signals, and reproducing processing circuits simultaneously supplied with reproduced signals read out by the heads to reproduce information from the reproduced signals.

Abstract translation: 具有高信息传递效率的信息记录和再现装置1包括形成多个记录表面的一个或多个记录介质，分别设置在记录表面上的多个记录头，用于支撑头部并均匀地移动头部的第一致动器 ，多个第二致动器，其设置为一个用于相关联的一个头部，第二致动器相对于第一致动器独立地移动头部，用于同时输出记录信号的记录处理电路，以及再现处理电路，同时提供由 磁头从再现的信号中再现信息。

公开(公告)号：US07747810B2

公开(公告)日：2010-06-29

申请号：US11645254

申请日：2006-12-21

Applicant: Tetsuya Uemura ,  Hideki Saga

Inventor： Tetsuya Uemura ,  Hideki Saga

IPC: G06F12/00

CPC classification number: G11B20/1217 ,  G11B2020/1238 ,  G11B2020/1247 ,  G11B2020/1248 ,  G11B2020/1267 ,  G11B2020/1292 ,  G11B2020/1294 ,  G11B2220/2516

Abstract: Embodiments in accordance with the present invention enable a disk drive of an address system to write data normally, wherein track groups of different track widths are discretely disposed on the storage medium in a same disk drive and the dimensional relationship among physical block addresses of a sector is valid for the dimensional relationship among logical block addresses. Track groups are managed corresponding to their respective track width in a disk drive and for disposing successively in a logical block address space the respective track groups located discretely on the physical block address space.

Abstract translation: 根据本发明的实施例使得地址系统的磁盘驱动器能够正常地写入数据，其中不同磁道宽度的磁道组在相同的磁盘驱动器中离散地布置在存储介质上，并且扇区的物理块地址之间的尺寸关系 对于逻辑块地址之间的维度关系是有效的。 轨道组根据磁盘驱动器的各自的磁道宽度进行管理，并且连续地在逻辑块地址空间中分别放置在物理块地址空间上的各个磁道组。

公开(公告)号：US07446969B2

公开(公告)日：2008-11-04

申请号：US11134088

申请日：2005-05-19

Applicant: Fumiko Akagi ,  Masukazu Igarashi ,  Hideki Saga

Inventor： Fumiko Akagi ,  Masukazu Igarashi ,  Hideki Saga

IPC: G11B5/02

CPC classification number: G11B5/66 ,  G11B5/02 ,  G11B5/656 ,  G11B11/10536 ,  G11B11/10584 ,  G11B11/10586 ,  G11B2005/001 ,  G11B2005/0021 ,  H01F10/137 ,  H01F10/16

Abstract: A thermally assisted magnetic recording system is provided to achieve excellent thermal resistance and low noise. In one embodiment, a magnetic recording medium is used, in which the magnetic intergrain exchange coupling is large to let the magnetization be thermally stable by coupling the magnetic grains constituting the recording layer at room temperature (the temperature maintaining the magnetization) and reduced by heating during recording to let the recording magnetization transition slope become steep. Parameter A normalizing the slope around the coercivity of the MH-loop of the medium is 1.5≦A

Abstract translation: 提供热辅助磁记录系统以实现优异的耐热性和低噪音。 在一个实施例中，使用磁记录介质，其中磁性颗粒间交换耦合大以通过在室温下（构成记录层的磁性颗粒）（保持磁化的温度）并通过加热而减小而使磁化热稳定 在记录期间使记录磁化转变斜率变得陡峭。 参数A围绕介质MH环的矫顽力的斜率标准化在室温下为1.5 <= A <6.0，加热时变为约1.0。

公开(公告)号：US20080168278A1

公开(公告)日：2008-07-10

申请号：US12006698

申请日：2008-01-04

Applicant: Hideki Saga ,  Tatsuya Hirai

Inventor： Hideki Saga ,  Tatsuya Hirai

IPC: H04L9/06

CPC classification number: G06F21/80 ,  G06F21/31 ,  G06F21/6218 ,  G06F2221/2133

Abstract: Embodiments of the present invention help to protect user data in its entirety from any unauthorized access, by making encryption key data used to encrypt the user data not available for reading, when a user having an authorized access right does not access an information recording medium for a predetermined length of time. According to one embodiment, through use of a magnetic disk in which a data losing time of an encryption key data recording area is shorter than a data losing time in a user data recording area, recording is performed to the magnetic disk while encrypting user data during recording, and encryption key data for use with encryption is recorded in the encryption data recording area. For reproduction of the user data by a user having an authorized access right, the encryption key data is read from the encryption key data recording area, and the user data encrypted during the recording is output while being decrypted using an encryption key generated by the encryption key data, and the encryption key data is overwritten on the encryption key data recording area.

Abstract translation: 本发明的实施例有助于通过制作用于加密不可用于读取的用户数据的加密密钥数据来保护用户数据全部免受任何未经授权的访问，当具有授权访问权限的用户不访问用于 预定的时间长度。 根据一个实施例，通过使用其中加密密钥数据记录区域的数据丢失时间短于用户数据记录区域中的数据丢失时间的磁盘，在磁盘中执行记录，同时在 记录和加密密钥数据被记录在加密数据记录区中。 为了由具有授权访问权限的用户再现用户数据，从加密密钥数据记录区读取加密密钥数据，并且在使用由加密产生的加密密钥进行解密的同时输出在记录期间加密的用户数据 密钥数据和加密密钥数据被重写在加密密钥数据记录区域上。

公开(公告)号：US20050259343A1

公开(公告)日：2005-11-24

申请号：US11134088

申请日：2005-05-19

Applicant: Fumiko Akagi ,  Masukazu Igarashi ,  Hideki Saga

Inventor： Fumiko Akagi ,  Masukazu Igarashi ,  Hideki Saga

IPC: G11B5/64 ,  G11B5/00 ,  G11B5/02 ,  G11B5/65 ,  G11B5/66 ,  G11B5/706 ,  H01F10/13 ,  H01F10/16 ,  G11B5/82

CPC classification number: G11B5/66 ,  G11B5/02 ,  G11B5/656 ,  G11B11/10536 ,  G11B11/10584 ,  G11B11/10586 ,  G11B2005/001 ,  G11B2005/0021 ,  H01F10/137 ,  H01F10/16

Abstract: A thermally assisted magnetic recording system is provided to achieve excellent thermal resistance and low noise. In one embodiment, a magnetic recording medium is used, in which the magnetic intergrain exchange coupling is large to let the magnetization be thermally stable by coupling the magnetic grains constituting the recording layer at room temperature (the temperature maintaining the magnetization) and reduced by heating during recording to let the recording magnetization transition slope become steep. Parameter A normalizing the slope around the coercivity of the MH-loop of the medium is 1.5≦A

Abstract translation: 提供热辅助磁记录系统以实现优异的耐热性和低噪声。 在一个实施例中，使用磁记录介质，其中磁性颗粒间交换耦合大以通过在室温下（构成记录层的磁性颗粒）（保持磁化的温度）并通过加热而减小而使磁化热稳定 在记录期间使记录磁化转变斜率变得陡峭。 参数A围绕介质MH环的矫顽力的斜率标准化在室温下为1.5 <= A <6.0，加热时变为约1.0。

公开(公告)号：US20050237890A1

公开(公告)日：2005-10-27

申请号：US11170154

申请日：2005-06-30

Applicant: Makoto Miyamoto ,  Tsuyoshi Toda ,  Masatoshi Ohtake ,  Motoyasu Terao ,  Junko Ushiyama ,  Keikichi Andoo ,  Yumiko Anzai ,  Akemi Hirotsune ,  Tetsuya Nishida ,  Hideki Saga

Inventor： Makoto Miyamoto ,  Tsuyoshi Toda ,  Masatoshi Ohtake ,  Motoyasu Terao ,  Junko Ushiyama ,  Keikichi Andoo ,  Yumiko Anzai ,  Akemi Hirotsune ,  Tetsuya Nishida ,  Hideki Saga

IPC: G11B7/00 ,  G11B5/09 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/006 ,  G11B7/125 ,  G11B7/126 ,  G11B20/10 ,  G11B20/14

CPC classification number: G11B7/0062 ,  G11B7/00454 ,  G11B7/00557 ,  G11B7/006 ,  G11B7/126 ,  G11B20/10009 ,  G11B20/1426

Abstract: Recording information is disclosed in which an information recording medium is irradiated with a recording energy beam that is power-modulated into at least a record power level and a record-ready power level lower than the record power level. The information is recorded on the recording medium in the form of length and interval of a mark portion. When forming a mark portion of a predetermined length, the radiation energy of the energy beam is increased as compared with when forming a mark portion of a different length before or after the first pulse of an energy beam pulse train including at least a pulse for forming the mark portion.

Abstract translation: 公开了一种信息记录介质，其被记录能量束照射，所述记录能量束被功率调制成至少记录功率电平和低于记录功率电平的记录就绪功率电平。 信息以标记部分的长度和间隔的形式记录在记录介质上。 当形成预定长度的标记部分时，与在至少包括用于形成的脉冲的能量束脉冲串的第一脉冲之前或之后形成不同长度的标记部分相比，能量束的辐射能量增加 标记部分。

公开(公告)号：US06842415B2

公开(公告)日：2005-01-11

申请号：US10600442

申请日：2003-06-23

Applicant: Makoto Miyamoto ,  Tsuyoshi Toda ,  Masatoshi Ohtake ,  Motoyasu Terao ,  Junko Ushiyama ,  Keikichi Andoo ,  Yumiko Anzai ,  Akemi Hirotsune ,  Tetsuya Nishida ,  Hideki Saga

Inventor： Makoto Miyamoto ,  Tsuyoshi Toda ,  Masatoshi Ohtake ,  Motoyasu Terao ,  Junko Ushiyama ,  Keikichi Andoo ,  Yumiko Anzai ,  Akemi Hirotsune ,  Tetsuya Nishida ,  Hideki Saga

IPC: G11B7/00 ,  G11B5/09 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/006 ,  G11B7/125 ,  G11B7/126 ,  G11B20/10 ,  G11B20/14

CPC classification number: G11B7/0062 ,  G11B7/00454 ,  G11B7/00557 ,  G11B7/006 ,  G11B7/126 ,  G11B20/10009 ,  G11B20/1426

Abstract: A method for recording information is disclosed in which an information recording medium is irradiated with a recording energy beam power-modulated into at least a record power level and a record-ready power level lower than the record power level. When forming a mark portion of a predetermined length, the radiation energy of the energy beam is increased as compared with when forming a mark portion of a different length before or after the first pulse of an energy beam pulse train including at least a pulse for forming the mark portion. Also, only in the case where the energy beam is modulated by the power lower in power level than the record-ready power level after the last pulse of the energy beam pulse train including at least one pulse for forming a mark portion and the mark portion is followed by a space portion of a predetermined length, the particular radiation energy of low power level is reduced as compared with when the mark portion is followed by a space potion of a different length. The radiation energy is increased and/or decreased.

公开(公告)号：US06809908B1

公开(公告)日：2004-10-26

申请号：US10069668

申请日：2002-05-20

Applicant: Kenchi Ito ,  Hideki Saga ,  Hiroaki Nemoto ,  Tomohiro Okada

Inventor： Kenchi Ito ,  Hideki Saga ,  Hiroaki Nemoto ,  Tomohiro Okada

IPC: G11B539

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/127 ,  G11B5/1278 ,  G11B5/3163 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  G11B7/1387 ,  G11B11/10534 ,  G11B11/10554 ,  G11B11/1058 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/001 ,  G11B2005/0021

Abstract: A light induction type thin film magnetic recording head according to the present invention includes a lower magnetic core (2) formed on a substrate, an upper magnetic core (6) whose front end part is connected to the lower magnetic core through a magnetic gap film and whose rear end part is directly connected to the lower magnetic core with a back contact part (11) formed of a magnetic substance, and an insulating layer (3) formed between the upper magnetic core and the lower magnetic core, characterized in that an optically transparent waveguide part (5) whose width is smaller than the width of the upper magnetic core and whose thickness is thinner than the thickness of the upper magnetic core is buried in the upper magnetic core, and a coil (8) which generates magnetic flux in a magnetic circuit composed of the upper magnetic core, lower magnetic core, magnetic gap, and back contact part is arranged around the back contact part.

Abstract translation: 根据本发明的感光型薄膜磁记录头包括形成在基板上的下磁芯（2），上磁芯（6），其前端部通过磁隙膜连接到下磁芯 并且其后端部由与磁性物质形成的背接触部（11）直接连接到下磁芯，以及形成在上磁芯与下磁芯之间的绝缘层（3），其特征在于， 光学透明的波导部分（5）的宽度小于上磁芯的宽度，其厚度比上磁芯的厚度薄，埋在上磁芯中，并且产生磁通量的线圈（8） 在由上磁芯，下磁芯，磁隙和后接触部构成的磁路中，配置在后接触部的周围。

公开(公告)号：US06614737B2

公开(公告)日：2003-09-02

申请号：US10076149

申请日：2002-02-15

Applicant: Harukazu Miyamoto ,  Hideki Saga ,  Seiji Yonezawa

Inventor： Harukazu Miyamoto ,  Hideki Saga ,  Seiji Yonezawa

IPC: G11B700

CPC classification number: G11B7/005 ,  G11B11/10515

Abstract: An optical reproduction apparatus includes a light source which irradiates irradiation light onto a recording medium, the irradiation light being reflected by the recording medium to produce reflection light, a modulator which repetitively pulse modulates the irradiation light to produce irradiation light pulses, a photodetector which detects reflection light from the recording medium at more than two timings during each of the irradiation light pulses, and outputs detection signals respectively representative of the reflection light detected at the more than two timings during each of the irradiation light pulses, and an operation circuit which performs an operation between the detection signals outputted from the photodetector during each of the irradiation light pulses.

公开(公告)号：US06608806B2

公开(公告)日：2003-08-19

申请号：US10270543

申请日：2002-10-16

Applicant: Makoto Miyamoto ,  Tsuyoshi Toda ,  Masatoshi Ohtake ,  Motoyasu Terao ,  Junko Ushiyama ,  Keikichi Andoo ,  Yumiko Anzai ,  Akemi Hirotsune ,  Tetsuya Nishida ,  Hideki Saga

Inventor： Makoto Miyamoto ,  Tsuyoshi Toda ,  Masatoshi Ohtake ,  Motoyasu Terao ,  Junko Ushiyama ,  Keikichi Andoo ,  Yumiko Anzai ,  Akemi Hirotsune ,  Tetsuya Nishida ,  Hideki Saga

IPC: G11B700

CPC classification number: G11B7/0062 ,  G11B7/00454 ,  G11B7/00557 ,  G11B7/006 ,  G11B7/126 ,  G11B20/10009 ,  G11B20/1426

Abstract: A method for recording information is disclosed in which an information recording medium is irradiated with a recording energy beam power-modulated into at least a record power level and a record-ready power level lower than the record power level. When forming a mark portion of a predetermined length, the radiation energy of the energy beam is increased as compared with when forming a mark portion of a different length before or after the first pulse of an energy beam pulse train including at least a pulse for forming the mark portion. Also, only in the case where the energy beam is modulated by the power lower in power level than the record-ready power level after the last pulse of the energy beam pulse train including at least one pulse for forming a mark portion and the mark portion is followed by a space portion of a predetermined length, the particular radiation energy of low power level is reduced as compared with when the mark portion is followed by a space potion of a different length. The radiation energy is increased and/or decreased.