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31. 发明专利

JPH11232694A RECORD MEDIUM 失效
公开(公告)号：JPH11232694A
公开(公告)日：1999-08-27
申请号：JP33367998
申请日：1998-11-25
申请人： HITACHI LTD , HITACHI MAXELL
发明人： ANDO KEIKICHI , TERAO MOTOYASU , TAMURA NORIHITO , MIYAUCHI YASUSHI , NISHIDA TETSUYA , OTA NORIO
IPC分类号： G11B7/24 , G11B7/241 , G11B7/254 , G11B7/257
摘要： PROBLEM TO BE SOLVED: To suppress reduction of a recording sensitivity by heat conduction of a thin film by providing, close to a recording thin film, multi-layers of a protection layer having Si, an appropriate oxide, a sulfide, and a nitride as main components. SOLUTION: An information recording thin film 4 is not deformed and shows a change in atom arrangement when irradiated with a recording beam such as a laser light or the like. Heat generated in the information recording thin film 4 when information is recorded by irradiation of the recording beam is diffused by a thin film of a second protection layer 2 having as a main component an oxide, a carbide or a nitride with a high heat conductivity, and shielded by a thin film of a first protection layer 3 having as a main component an oxide or a sulfide with a low heat conductivity. Accordingly, heat conduction to a substrate 1 of a disk which is made of resin or glass and provided with guide grooves is small. In addition, the heat generated by the irradiation of the recording beam is absorbed or diffused by respective thin films having a metal element as a main component, whereby heat conduction to a resin to be used for adhering the disk is small. Furthermore, the number of pinholes is reduced, resistance against a stress generated when erasing the recorded information is enhanced, and the resin exhibits no deformation or changes in quality.

32. 发明专利

JPH11219527A RECORDING MEDIUM OF INFORMATION, RECORDING METHOD AND RECORDER 失效
公开(公告)号：JPH11219527A
公开(公告)日：1999-08-10
申请号：JP31563098
申请日：1998-11-06
申请人： HITACHI LTD , HITACHI MAXELL
发明人： MIYAUCHI YASUSHI , TERAO MOTOYASU , HIROTSUNE AKEMI , MINEMURA HIROYUKI
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/006 , G11B7/007 , G11B7/24 , G11B7/243 , G11B20/12
摘要： PROBLEM TO BE SOLVED: To suppress the regenerative signal waveform distortion by the flow of a recording film at the time of many times of rewriting in an information recording method capable of recording information by irradiation with an energy beam. SOLUTION: The recording of the information is executed by the signal obtd. by adding the signal of a dummy to at least either before or behind the recording information signal by using the recording medium having recording regions 14 held by dummy regions 15, 16 in succession to a preformat region 10. As a result, the flow of the recording film at the time of many times of rewriting accumulates up to the dummy regions and does not affect the inside of the desired recording regions and, therefore, the sure reproduction of the desired recording information is made possible.

33. 发明专利

JPH10228676A INFORMATION RECORDING MEDIUM AND INFORMATION RECORDING AND REPRODUCING SYSTEM 失效
公开(公告)号：JPH10228676A
公开(公告)日：1998-08-25
申请号：JP32265597
申请日：1997-11-25
申请人： HITACHI LTD , HITACHI MAXELL
发明人： MIYAMOTO MAKOTO , HIROTSUNE AKEMI , TERAO MOTOYASU , FUKUI YUKIO , TOKUJIYUKU NOBUHIRO , MIYAUCHI YASUSHI , ANDO KEIKICHI , NISHIDA TETSUYA , MORIYA KOICHI
IPC分类号： C23C28/02 , G11B7/00 , G11B7/004 , G11B7/24 , G11B7/258
摘要： PROBLEM TO BE SOLVED: To obtain an information recording medium having an information recording thin film as a recording layer in which the configuration of atoms is changed by irradiation of energy beams of form recording marks, and to enable rewriting in many times in this medium. SOLUTION: A first reflection layer formed nearer to a recording layer has a compsn. essentially comprising Al, Cu, Ag, Au, Pt, Pd, and the sum of the compsn. rations of these elements is controlled to >=65% and

34. 发明专利

JPH097224A RECORDING MEMBER AND RECORDING METHOD AND RECORDING DEVICE USING THE SAME MEMBER 失效
公开(公告)号：JPH097224A
公开(公告)日：1997-01-10
申请号：JP15824395
申请日：1995-06-26
申请人： HITACHI LTD , HITACHI MAXELL
发明人： MIYAUCHI YASUSHI , TERAO MOTOYASU , NISHIDA TETSUYA , HIROTSUNE AKEMI
IPC分类号： G11B7/24 , G11B7/00 , G11B7/30 , G11B11/10 , G11B11/105
摘要： PURPOSE: To enable accurate multi-valued recording with good reproducibility by using a multilayered recording member in which reflectance in the same position is changed stepwise and an almost same recording mark can be formed in each recording layer when information is recorded or rewrited by irradiation of energy beams. CONSTITUTION: The recording member has a multilayers structure comprising phase transition recording films (A) 4, (B) 6 and (C) 8 having different recrystallization times after fused and dielectric layers 5, 7 among the recording films. When recording or rewriting is done in this recording member, the recording waveform is controlled in such a manner that the power is the level to melt the whole recording films and that either the power level falling just after the recording pulse or the holding time of the low power level after falling is changed, or both of these waveforms are changed according to the information signal to be recorded. Thereby enabling multilevel recording with good reproducibility according to the recording waveform in the same position.

35. 发明专利

JPH0863785A OPTICAL RECORDING MEDIUM AND INFORMATION PROCESSOR USED FOR THE SAME 失效
公开(公告)号：JPH0863785A
公开(公告)日：1996-03-08
申请号：JP20176294
申请日：1994-08-26
申请人： HITACHI LTD , HITACHI MAXELL
发明人： TERAO MOTOYASU , NISHIDA TETSUYA , MIYAUCHI YASUSHI , HIROTSUNE AKEMI
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/005 , G11B7/006 , G11B7/125 , G11B7/126 , G11B7/24 , G11B7/257
摘要： PURPOSE: To prevent imperfect erasing at the time rewriting by a reflectivity difference between recording mark parts and parts exclusive thereof and to increase the number of reloadable times. CONSTITUTION: This optical recording medium is provided with a layer (reflectivity adjusting layer) 6 which is changed in optical constant by melting, etc., at the time of photoirradiation separately from a recording layer 8 by a phase transition, etc., and is so formed that the reflectivity of the part having the high reflectivity on recording tracks is =60% at the time of the irradiation with the weak light. The laser power of the optical disk device using such optical disk is set at the power higher than the power at which the optical constant of the reflectivity adjusting layer changes largely and at which the high melting component does not melt at the time of rewriting. The optical disk which has the high recording sensitivity, is readable out by a CD player, etc., and is reloadable by overwriting and the optical disk device using such disk are obtd. The overwriting characteristics are good and the number of rewriting times is large.

36. 发明专利

JPH05135362A RECORDING MATERIAL FOR INFORMATION AND RECORDING DEVICE 失效
公开(公告)号：JPH05135362A
公开(公告)日：1993-06-01
申请号：JP29902691
申请日：1991-11-14
申请人： HITACHI LTD , HITACHI MAXELL
发明人： MIYAUCHI YASUSHI , TERAO MOTOYASU , MIYAMOTO JIICHI , OKAMINE SHIGENORI
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/24 , G11B7/30
摘要： PURPOSE:To provide a recording material for information which shortens a read-out time of information and also in which a ROM region with a large capacity and a RAM region coexist and to provide a recording device using the material. CONSTITUTION:Since a RAM information track 42 between ROM information tracks 41 is provided, the read-out of information and the recording are carried out in an instant and surely. Also the information is inputted in the tracking groove and between the grooves, thus the recording capacity is greatly increased.

37. 发明专利

JPH04310640A INFORMATION RECORDING MEMBER 失效
公开(公告)号：JPH04310640A
公开(公告)日：1992-11-02
申请号：JP7609291
申请日：1991-04-09
申请人： HITACHI LTD , HITACHI MAXELL
发明人： ANDO KEIKICHI , TERAO MOTOYASU , MIYAUCHI YASUSHI , OKAMINE SHIGENORI
IPC分类号： G11B7/24
摘要： PURPOSE:To provide an information recording member without the reading laser beam being scattered by the cracking of the protective layer or the recording film and with the change in the recording and reading characteristics reduced. CONSTITUTION:The objectives are achieved by providing a protective layer consisting of at least one kind of material consisting essentially of the oxide, selenide, sulfide or nitride having the density of 50-80% of the bulk density. Furthermore, the ratio of the density of the protective layer close to the information recording film to that far from the thin film is preferably controlled to (1:0.5) to (1:0.85). Consequently, the protective layer withstands the external force, especially the tensile force, and the diffusion of the atom in the recording film into the protective film is strictly inhibited.

38. 发明专利

JPH04228127A INFORMATION RECORDING THIN FILM, INFORMATION RECORDING MEMBER AND THEIR PRODUCTION 失效
公开(公告)号：JPH04228127A
公开(公告)日：1992-08-18
申请号：JP10250891
申请日：1991-05-08
申请人： HITACHI LTD , HITACHI MAXELL
发明人： TERAO MOTOYASU , ANDO KEIKICHI , OKAMINE SHIGENORI , MIYAUCHI YASUSHI , TAKAHASHI MASAHIKO , FUTAMOTO MASAAKI , TAMURA NORIHITO
IPC分类号： G11B11/105 , G11B7/24 , G11B7/254 , G11B7/257 , G11B7/26 , G11B11/10
摘要： PURPOSE:To provide a high-sensitivity and durable information recording thin film capable of being rewritten many times, an information recording member using the thin film and its production. CONSTITUTION:Ruggednesses are provided on at least one surface of an information recording thin film with the physical properties such as phase transition and reversal of magnetization changed by the irradiation with a recording energy beam, and an inorg. protective layer is furnished on the rugged surface. Since the flow of the recording thin film is almost perfectly prevented with respect to a phase-transition optical disk, the frequency of rewriting is drastically increased. Besides, as the line of magnetic force in the recording thin film is not spread with respect to the magneto-optical or magnetic disk, the recording thin film composition even with small vertical magnetic anisotropy is magnetized perpendicularly to the film surface, and the tolerance for the composition is widened.

39. 发明专利

JPH0373436A MEMBER FOR INFORMATION RECORDING 失效
公开(公告)号：JPH0373436A
公开(公告)日：1991-03-28
申请号：JP11006090
申请日：1990-04-27
申请人： HITACHI LTD , HITACHI MAXELL
发明人： ANDO KEIKICHI , TERAO MOTOYASU , TAMURA NORIHITO , MIYAUCHI YASUSHI , NISHIDA TETSUYA , OTA NORIO
IPC分类号： G11B7/24 , G11B7/241 , G11B7/254 , G11B7/257
摘要： PURPOSE:To prevent the deformation of a substrate by the irradiation heat of a beam for recording by providing 1st and 2nd protective layers essentially consisting of a specific oxide, sulfide or nitride in proximity to a thin film for recording. CONSTITUTION:The thin film 4 for information recording which is formed on the substrate 1 and generates a change by receiving the irradiation with a beam for recording is provided. The 1st protective layer 3 which consists of at least one material selected from the materials essentially consisting of the oxide, sulfide or selenide having the thermal conductivity ranging >= 0.5 W/m.K and = 8W/m.K and

40. 发明专利

JPH0298488A INFORMATION RECORDING THIN FILM AND RECORDING AND REPRODUCTION OF INFORMATION 失效
公开(公告)号：JPH0298488A
公开(公告)日：1990-04-10
申请号：JP24989088
申请日：1988-10-05
申请人： HITACHI LTD , HITACHI MAXELL
发明人： TAMURA NORIHITO , TERAO MOTOYASU , MIYAUCHI YASUSHI , ANDO KEIKICHI , NISHIDA TETSUYA
IPC分类号： B41M5/26 , G11B7/00 , G11B7/004 , G11B7/24 , G11B7/243
摘要： PURPOSE:To provide an information recording thin film having favorable recording and reproduction characteristics, high sensitivity and favorable stability by providing an information recording thin film which has an average composition in the film thickness direction of the general formula: SnxSbyTezSealphaAbetaBgammaCdelta. CONSTITUTION:An information recording thin film in which the arrangement of atoms is varied when being irradiated with a beam has an average composition in the film thickness direction of the general formula: SnxSbyTezSealphaAbetaBgammaCdelta, wherein x, y, z, alpha, beta, gamma and delta are such atomic percentages that 3

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