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81. 发明专利

JPH01208744A RECORDING MEMBER 失效
公开(公告)号：JPH01208744A
公开(公告)日：1989-08-22
申请号：JP3274888
申请日：1988-02-17
申请人： HITACHI LTD , HITACHI MAXELL
发明人： ANDO KEIKICHI , TERAO MOTOYASU , NISHIDA TETSUYA , MIYAUCHI YASUSHI , TAMURA AYAHITO
IPC分类号： G11B7/241 , G11B7/24
摘要： PURPOSE:To prevent deterioration in properties of a resin or deformation thereof by radiation of a recording beam by providing a thin film essentially consisting of specific metal elements having a small thermal conductivity on a thin film for recording. CONSTITUTION:A protective layer 4 is laminated on the thin film 3 for information recording which is formed via a lower protective layer 2 on a substrate 1 having guide grooves and generates a change of atomic configuration with substantially no deformation when subjected to irradiation of the beam for recording. The layer essentially consisting of at least one selected from a group consisting of Al, Ti, V, Cr, Fe, Ni, Bi, etc., is laminated as a thin film 5 and thereafter, the thin film 5 side of the substrate 1 and a protective plate 7 are stuck to each other by using a resin 6 which is cured by radiation of UV rays. The thin film 5 consists essentially of the metal elements having the small thermal conductivity and diffuses the heat generated by the radiation of the beam for recording. The deterioration in the properties of the resin 6 or the deformation thereof generated by the radiation of the beam for recording thereto is thereby prevented.

82. 发明专利

JPS6425327A INFORMATION RECORDING MEDIUM 失效
公开(公告)号：JPS6425327A
公开(公告)日：1989-01-27
申请号：JP18111687
申请日：1987-07-22
申请人： HITACHI LTD
发明人： NISHIDA TETSUYA , TERAO MOTOYASU , OTA NORIO , KATO KEIZO , ANDO KEIKICHI
IPC分类号： B41M5/26 , G11B7/24 , G11B7/253
摘要： PURPOSE:To provide the titled medium which decreases noise at the time of recording and reproducing and decreases the incomplete erasing at the time of rewriting of information by forming a recording film directly or via other layer onto a highly heat resistant substrate which is directly formed with guides for tracking and has >=200 deg.C glass transition point at 5 deg.C heating up rate per minute. CONSTITUTION:The highly heat resistant material which is directly formed with the guides for tracking and has >=200 deg.C glass transition point at 5 deg.C heating up rate per minute is used as the substrate 1 to be used for the information recording medium which utilizes the change of atomic configuration by projection of an energy beam. The recording film 2 may be directly formed on the substrate 1 and may be formed via the highly heat resistant org. material layer having >=200 deg.C glass transition point in the case of forming the recording film on this substrate 1. The deformation of the substrate 1 at the time of recording and erasing the information by the projection of the energy beam is thereby obviated and, therefore, the increase in the noises at the time of the recording and erasing of the information is obviated. The incomplete erasing at the time of the information rewriting is extremely little.

83. 发明专利

JPS63281237A INFORMATION RECORDING MEDIUM 失效
公开(公告)号：JPS63281237A
公开(公告)日：1988-11-17
申请号：JP11461687
申请日：1987-05-13
申请人： HITACHI LTD
发明人： NISHIDA TETSUYA , TERAO MOTOYASU , YASUOKA HIROSHI , ANDO KEIKICHI , OTA NORIO
IPC分类号： B41M5/26 , G11B7/24 , G11B7/254 , G11B7/257 , G11B9/10
摘要： PURPOSE:To decrease disk noises and signals which remain without being erased at the time of rewriting of information and to stabilize tracking by specifying the heat conductivity of inorg. protective layers formed on a recording film and at least one side of the recording film. CONSTITUTION:The inorg. protective layers are so formed that the heat conductivity thereof is >=2J/m.s.k at 273K. The heat conductivity of at least one of the protective layers is specified within this range in the case of providing said layers on both faces of the recording film. The inorg. protective layers may be of one-layered structure or the structure in which >=2 layers are combined; however, the escape of the heat applied by laser light increases too much and the greatly deteriorated recording sensitivity is caused if the heat conductivity is excessively large. The heat conductivity of the inorg. protective layers is, therefore,

84. 发明专利

JPS63263642A THIN FILM FOR INFORMATION RECORDING 失效
公开(公告)号：JPS63263642A
公开(公告)日：1988-10-31
申请号：JP9739387
申请日：1987-04-22
申请人： HITACHI LTD , HITACHI MAXELL
发明人： NISHIDA TETSUYA , TERAO MOTOYASU , ANDO KEIKICHI , TAMURA AYAHITO , OTA NORIO
IPC分类号： B41M5/26 , G11B7/24 , G11B7/243 , G11B9/10
摘要： PURPOSE:To improve recording, erasing and reproducing characteristics, sensitivity, stability, etc., by using a material of which the compsn. in the film thickness direction satisfies the specific formula to form a thin film for recording which generates a change in atomic arrangement when irradiated with an energy beam for recording. CONSTITUTION:The thin film for information recording which has the good recording, erasing and reproducing characteristics and has the high sensitivity and stability is obtd. when the thin film for recording is formed on a substrate by using the compsn. material of which the compsn. in the film thickness direction satisfies the formula. In the formula, B; at least one element among Zn, Cd, Al, Ga, Bi, O, and S, A: at least one element among elements except the elements of B and In, Sb.

85. 发明专利

JPS63183624A METHOD FOR RECORDING AND ERASING INFORMATION 失效
公开(公告)号：JPS63183624A
公开(公告)日：1988-07-29
申请号：JP1416187
申请日：1987-01-26
申请人： HITACHI LTD
发明人： NISHIDA TETSUYA , TERAO MOTOYASU , SUKETA YASUSHI , OTA NORIO , TSUNODA YOSHITO , KAKU TOSHIMITSU , ANDO KEIKICHI
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/0055 , G11B7/006 , G11B7/013 , G11B7/30 , G11B11/105
摘要： PURPOSE:To facilitate checking of recording or erasing and to shorten access time of an information recording medium which utilizes the change in optical constant which takes place when the regularity of atomic arrangement is changed by projection of laser light to said medium by detecting the reflected light from said medium during recording or erasing. CONSTITUTION:The replica of grooves for tracking is formed by a UV curing resin on the surface of disk-shaped chemical tempered glass to form a substrate 1. An SiO2 protective film 2 is deposited thereon by a magnetron sputtering method. A recording film 3 is then formed thereon by respective independent vapor deposition of Ge, Te and Se. The surface thereof is coated with a protective layer 4 formed by the similar method. Rectangular pulses of single laser light are projected to the information recording medium constituted in such a manner, then the medium attains a noncrystalline state, i.e., low reflectivity regardless of the crystal state prior to the irradiation if the power is high. The medium attains the crystal state, i.e., high reflectivity if the power is low. Checking of whether recording state or erasing state is facilitated when the reflected light is detected.

86. 发明专利

JPS61187305A GARNET FILM FOR ION-IMPLANTING TYPE MAGNETIC BUBBLE ELEMENT 失效
公开(公告)号：JPS61187305A
公开(公告)日：1986-08-21
申请号：JP2622885
申请日：1985-02-15
申请人： HITACHI LTD
发明人： HOSOE YUZURU , ANDO KEIKICHI , IKEDA HITOSHI , SUZUKI MAKOTO
IPC分类号： G11C11/14 , C01G49/00 , C23C14/08 , G11C19/08 , H01F10/24
摘要： PURPOSE:To enable to obtain excellent transfer characteristics in a wide temperature range by a method wherein the composition of the garnet film, to be used for an ion-implanting type magnetic bubble, is formed into a specific one. CONSTITUTION:The composition of the magnetic garnet film to be used for an ion-implanting type magnetic bubble element is indicated by formula in such a manner that the value of v, w, x and z is brought within the range of 0.05

87. 发明专利

JPS5156786A 失效
公开(公告)号：JPS5156786A
公开(公告)日：1976-05-18
申请号：JP12995774
申请日：1974-11-13
申请人： HITACHI LTD
发明人： KASAI TOSHIAKI , ANDO KEIKICHI , ISHIDA FUMIHIKO , SETA YOSHIRO , SUGITA YUTAKA
IPC分类号： C30B19/10 , H01F41/28 , H01L21/208

88. 发明专利

JP2003178487A INFORMATION RECORDING MEDIUM AND ITS MANUFACTURING METHOD 审中-公开
公开(公告)号：JP2003178487A
公开(公告)日：2003-06-27
申请号：JP2001378026
申请日：2001-12-12
申请人： HITACHI LTD
发明人： HIROTSUNE AKEMI , MIYAMOTO MAKOTO , SHINTANI TOSHIMICHI , ANDO KEIKICHI , ANZAI YUMIKO , KUROKAWA TAKAHIRO
IPC分类号： G11B7/24 , B32B3/02 , G11B5/127 , G11B7/254 , G11B7/257 , G11B7/26
摘要： PROBLEM TO BE SOLVED: To provide an information recording medium for performing high- density recording and reproducing which maintains favorable recording and reproducing characteristics and is excellent in the mass-productivity by using an interfacial layer having high thermal stability and a high sputtering rate. SOLUTION: The recording medium has the interfacial layer 3 having the film thickness as ≥0.25 and ≤0.67 time as the total thickness of a first protective layer 2 and the interfacial layer and containing tantalum (Ta) and oxygen (O). COPYRIGHT: (C)2003,JPO

89. 发明专利

JP2003051137A Information recording medium 审中-公开
标题翻译：信息记录媒体
公开(公告)号：JP2003051137A
公开(公告)日：2003-02-21
申请号：JP2001238686
申请日：2001-08-07
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SHINTANI TOSHIMICHI , TERAO MOTOYASU , ANDO KEIKICHI
IPC分类号： G11B7/24 , G11B7/241 , G11B7/243 , G11B7/244
CPC分类号： G11B7/246 , B82Y10/00 , G11B7/24 , G11B7/24038 , G11B7/243 , G11B7/252 , G11B7/2534 , G11B7/257
摘要： PROBLEM TO BE SOLVED: To eliminate the difficulty in optimizing optical characteristics while maintaining optimum recording characteristics because there is heretofore a need for equally dividing signals with layers existing in a plurality. SOLUTION: A multilayered disk having (n) layers of recording layers is so designed as to satisfied an equation (4) when the transmittance Ti ((i) is an integer from 1 to n-1) of the first layer when viewed from a light incident side is condensed to the recording layer of the j-th layer ((j) is an integer of (2) to (n)) in order to improving the reproducing and/or recording characteristics in the respective layers. As a result, the recording and reproducing characteristics of the multilayered medium of the optical disk, more particularly the multilayered medium of a rewriting type can be improved.
摘要翻译：要解决的问题：为了消除在优化光学特性的同时保持最佳记录特性的难度，因为迄今为止需要具有存在多个层的信号的均分信号。解决方案：具有（n）层记录层的多层盘被设计成当第一层的透光率Ti（（i）为1至n-1的整数）时满足公式（4），当从为了提高各层的再现和/或记录特性，光入射侧被冷凝到第j层的记录层（（j）是（2）至（n）的整数）。结果，可以提高光盘的多层介质，更具体地说是重写型的多层介质的记录和再现特性。

90. 发明专利

JP2001344818A INFORMATION RECORDING MEDIUM AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2001344818A
公开(公告)日：2001-12-14
申请号：JP2001086638
申请日：2001-03-26
申请人： HITACHI LTD , HITACHI MAXELL
发明人： TERAO MOTOYASU , USHIYAMA JUNKO , MIYAUCHI YASUSHI , ANDO KEIKICHI , MIYAMOTO MAKOTO , ANZAI YUMIKO , TAMURA NORIHITO , IKARI YOSHIHIRO , FUCHIOKA TAMOTSU
IPC分类号： G11B7/254 , G11B7/24 , G11B7/243 , G11B7/257 , G11B7/258 , G11B7/26
摘要： PROBLEM TO BE SOLVED: To provide an information recording medium keeping recording/ reproducing characteristics excellent and having high reliability even when overwriting is carried out in the case of high-density recording/reproducing. SOLUTION: Such a stress adjusting layer 17 is arranged, as contains a metal element such as Cr as the principal component and has shrinking property (tensile stress) so that a laminated film has a columnar structure reaching from the under surface to the top surface. As a result, since the internal stress between the whole laminated film and a substrate can be made small, the deformation of the disk surface can be strained to be small and address reading errors, cross talk and erasion of the adjacent tracks can not be caused. It is possible to record/rewrite information many times in the case of high-density recording. The layer 17 rarely exerts bad influences on high-density recording, many-time recording and reliability to obtain the extremely useful information recording medium.

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