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21. 发明专利

GB2163863A OPTICAL INFORMATION RECORDING MEDIUM 未知
公开(公告)号：GB2163863A
公开(公告)日：1986-03-05
申请号：GB8517074
申请日：1985-07-05
申请人： RICOH KK
发明人： ABE MICHIHARU , SATO TSUTOMU , OBA HIDEAKI , UMEHARA MASAAKIRA , UEDA YUTAKA , YAMAMURO TETSU
IPC分类号： G11B7/244 , G03C5/00
摘要： This invention relates to an optical information recording medium, characterized by having an organic thin film recording layer containing at least one of triaryl methane type coloring matters expressed by the general formula (1), (2) or (3): (1) (2) (wherein, in the above formulas (1) and (2), Ar1, Ar2 and Ar3 may be the same or different and represent a substituted or non-substituted arylene group, at least one pair of optical two nitrogen atoms bonded with said arylene groups being connected by an atomic chain having at least ten carbon atoms in total number in the shortest way; R1, R2, R3, R4, R5, R6 and R7 may be the same or different and represent hydrogen atom, aliphatic hydrocarbon group, cycloaliphatic hydrocarbon group, aromatic hydrocarbon group, halogen group, oxygen-containing characteristic group, ether group, carboxylic acid group, carboxylic acid ester group, acyl group, oxygen-containing complex group, sulfur-containing characteristic group, one nitrogen atom-containing characteristic group, two nitrogen atom-containing characteristic group or heterocyclic group; and X- represents and acid anion); or (3) (wherein in the above general formula (3), Ar4, Ar5 and Ar6 may be the same or different and represent a substituted or non-substituted aryl group; and X- represents an acid anion; provided that at least one of said three aryl groups is a group expressed by the general formula, wherein Z represents R8, R9, R10 and R11 may be the same or different and represent hydrogen atom, aliphatic hydrocarbon group, cycloaliphatic hydrocarbon group, aromatic hydrocarbon group, halogen group, oxygen-containing characteristic group, ether group, carboxylic acid group, carboxylic acid ester group, acyl group, oxygen-containing complex group, sulfur-containing characteristic group, one nitrogen atom-containing characteristic group, two nitrogen atom-containing characteristic group or heterocyclic group; 1 represents 0 or an integer of 1 to 3; and m represents 0 or an integer of 1 to 4).

22. 发明专利

FR2569034A1 未知
公开(公告)号：FR2569034A1
公开(公告)日：1986-02-14
申请号：FR8512349
申请日：1985-08-13
申请人： RICOH KK
发明人： OBA HIDEAKI , UEDA YUTAKA , SATO TSUTOMU , UMEHARA MASAAKIRA , ABE MICHIHARU
IPC分类号： G11B7/2472 , G11B7/249 , G11B7/253 , G11B7/2533 , G11B7/24
摘要： This invention provides an optical information recording medium that has, on a substrate, a recording layer containing a cyanine dye represented by the general formula: (wherein, R1, R2 and R3 may be the same or different and each stands for a substituted or unsubstituted alkyl group; X stands for a perhalogenate ion, a toluenesulfonate ion or an alkylsulfate ion; n stands for an integrer of 0 or 1-3; a first halogen atom is present in at least one of each 4, 6 and 7-positions of the indole and indolenine rings; a second halogen atom may be present in each 5-position of said rings; and at lest one group consisting of alkyl, alkoxy, hydroxy, carboxy, allyl and alkylcarbonyl may be present in at least one of each 4, 5, 6 and 7-positions of said rings.) and, if necessary, a transition metal complex or a salt of said complex with a cation.

23. 发明专利

DE3503995A1 未知
公开(公告)号：DE3503995A1
公开(公告)日：1985-08-08
申请号：DE3503995
申请日：1985-02-06
申请人： RICOH KK
发明人： SATO TSUTOMU , UMEHARA MASAAKIRA , ABE MICHIHARU , OBA HIDEAKI , UEDA YUTAKA
IPC分类号： G11B7/241 , G11B7/244 , G11B7/246 , G11B7/2463 , G11B7/247 , G11B7/2472 , G11B7/2475 , G11B7/248 , G11B7/249 , G11B7/2492 , G11B7/2498 , G11B7/253 , G11B7/2533 , G11B7/254 , G11B7/257 , G11B7/24
摘要： This invention relates to an optical information recording medium having an organic thin film recording layer, and optionally having an underlayer and/or protective layer, characterized in that at least one of said recording layer, underlayer and protective layer contains a compound expressed by the general formula (1), (1) wherein R represents hydrogen or a lower alkyl group; X represents acid anion; m represents 0, 1 or 2; and A represents (n being 1 or 2) or (when m is 2); all the aromatic rings optionally having a substituent selected from the group of a lower alkyl group, lower alkoxy group, halogen and hydroxyl group.

24. 发明专利

JPH0512680A OPTICAL INFORMATION RECORDING MEDIUM AND PRODUCTION OF MASTER DISK OF STAMPER FOR OPTICAL INFORMATION RECORDING MEDIUM 失效
公开(公告)号：JPH0512680A
公开(公告)日：1993-01-22
申请号：JP19095491
申请日：1991-07-05
申请人： RICOH KK
发明人： UEDA YUTAKA , YASHIRO TORU
IPC分类号： G11B7/007 , G11B7/0045 , G11B7/24 , G11B7/26
摘要： PURPOSE:To obviate the flucuation of reflectance at a connecting part between a ROM part and a DRAW part in an optical information recording medium providing the ROM part and the DRAW part on one medium face. CONSTITUTION:On the ROM part of a substrate 1, a pre-pit P having the sectional shape of a roughly trapesoid is formed previously, on the DRAW part, a guiding groove G having the sectional shape of a roughly V-shape is formed previously. Further, in a ROM area, the adjacent pre-pits are connected with each other in a track direction with a groove G' having the same shape as the guiding groove G of the DRAW part. Besides, the initial pre-pit and/or the last pre-pit of the ROM part are connected respectively with the guiding groove of the back and forth of the ROM part without being interrupted. Thus, since the same shape groove is present in a space part between the pits of the ROM part and the DRAW part, the reflectance of both the parts are equal. Then, the fluctuation of the reflectance in the above-mentioned connecting part is obviated.

25. 发明专利

JPH04313832A PRODUCTION OF OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH04313832A
公开(公告)日：1992-11-05
申请号：JP10684791
申请日：1991-04-11
申请人： RICOH KK
发明人： YASHIRO TORU , UEDA YUTAKA
IPC分类号： G11B7/26
摘要： PURPOSE:To allow coating with the accurate position control at the inner peripheral end of a light absorption layer and to execute stable reading out of information by executing the spin coating in the environment where the gaseous pressure on the central side of a substrate is higher than the atm. pressure on the outer peripheral side of the substrate. CONSTITUTION:This optical recording medium has the light absorption layer formed by spin coating on the substrate. The environment where the gaseous pressure on the central side of the substrate is higher than on the outer peripheral end side of the substrate is formed by circumferentially discharging gaseous nitrogen of a specified flow rate from a gaseous nitrogen outflow port 5 in this system. The flowing or splashing of a coating liquid by a difference in the atm. pressure does not arise on the inner peripheral side of the substrate and, therefore, the control accuracy in the position at the inner peripheral end is improved and the degradation in the recording capacity is obviated. The stable reading out of the information is thus executed.

26. 发明专利

JPH04193588A OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH04193588A
公开(公告)日：1992-07-13
申请号：JP32630890
申请日：1990-11-28
申请人： RICOH KK
发明人： UEDA YUTAKA , YASHIRO TORU
IPC分类号： B41M5/26 , G11B7/24 , G11B7/244
摘要： PURPOSE:To obtain a sufficient track error signal by forming a light absorbing layer from a dye membrane formed by a vapor deposition method and making the max. absorption wavelength shorter than the wavelength of laser beam for recording and regeneration. CONSTITUTION:A light absorbing layer 2, a reflecting layer 3 and a protective layer 4 are successively laminated to a substrate 1. Since the light absorbing layer 2 is provided by a vapor deposition method, even when a thick film is formed, said film does not fill the grooves of the substrate like a film provided by a spin coating method. Therefore, a track error signal is ensured. Since the max. absorption wavelength of a dye membrane is shifted from the wavelength of laser beam for recording and regeneration, the dye membrane has proper transmissivity and can obtain high reflecivity by multiple reflection interference effect. The material of the light absorbing layer is composed of a dye susceptible to vapor deposition and pref. formed into a vapor deposition film whose max. absorption wavelength is shifted from the wavelength of laser beam on a short wavelength side. Further, absorption in the wavelength region of laser beam is required to a certain extent.

27. 发明专利

JPH03187034A OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH03187034A
公开(公告)日：1991-08-15
申请号：JP32614289
申请日：1989-12-18
申请人： RICOH KK
发明人： UEDA YUTAKA , YASHIRO TORU
IPC分类号： G11B7/24
摘要： PURPOSE:To release the deterioration of sensitivity by providing a recording layer, org. dye or pigment layer, and protective layer and allowing the lowest temp. among the melting point, sublimation point, or/and thermal decomposition temp. of the org. dye or pigment to be higher by >=50 deg.C than the crystallization temp. of the recording layer. CONSTITUTION:An org. dye layer 3 is provided between the phase-change recording layer 2 and protective layer 4 on a substrate 1 and the org. dye absorbs the light of such wavelength used for recording and reproducing. The rays of light partly transmitted through the layer 2 which are too much for absorption are absorbed by the org. dye or pigment and converted into heat, which improves recording sensitivity. By constituting the light-absorbing layer with single org. dye or pigment, the efficiency of heat generation is high and can be easily formed. Recording can be performed by irradiating the amorphous film with the light to crystallize the film. Therefore, it is required that the lowest temp. among the melting point, sublimation point, or/and thermal decomposition temp. of the org. dye or pigment is higher by >=50 deg.C than the crystallization point of the recording layer 2. If the lowest temp. among these is lower than this spec, the deformation or the modification of the org. dye or pigment layer is generated on recording to deteriorate C/N.

28. 发明专利

JPH03172358A RESIN COMPOSITION FOR OVERCOATING OPTICAL DISC 失效
公开(公告)号：JPH03172358A
公开(公告)日：1991-07-25
申请号：JP31314889
申请日：1989-12-01
申请人： RICOH KK
发明人： UEDA YUTAKA , YASHIRO TORU
IPC分类号： G11B7/24 , C09D4/00 , C09D4/02 , C09D171/00 , G11B7/254 , G11B7/257
摘要： PURPOSE:To obtain the title composition capable of reducing cost, being subjected to spin coating without using a solvent, comprising pentaacrylate, etc., triacrylate, diacrylate, monoacrylate and a photopolymerization initiator. CONSTITUTION:The objective composition comprising 100 pts.wt. total amounts of (A) 5-50 pts.wt. penta- and/or hexaacrylate (e.g. dipentaerythritol pentaacrylate) shown by formula I [at least five of R1 to R6 are acryloyloxy (CH2=CHCOO) and the rest is OH], (B) 10-60 pts.wt. triacrylate (e.g. pentaerythritol triacrylate) shown by formula II R7 is OH or CH3: R8 to R10 are acryloyloxy), (C) 10-40 pts.wt. diacrylate (e.g. diacrylate of butanediol diglycidyl ether) shown by formula III (R11 and R12 are acryloyloxy; (n) is 4-8) and (D) 5-30 pts.wt. monoacrylate shown by formula IV and (E) 2-8 pts.wt. photopolymerization initiator.

29. 发明专利

JPH038143A OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH038143A
公开(公告)日：1991-01-16
申请号：JP14265389
申请日：1989-06-05
申请人： RICOH KK
发明人： UEDA YUTAKA , YASHIRO TORU
IPC分类号： G11B7/254 , G11B7/24 , G11B7/257
摘要： PURPOSE:To improve the recording and erasing sensitivity and productivity of the medium formed with a recording layer and protective layer on a transparent substrate by forming the protective layer of the hydrolyzed condensate of a specific metal org. compd. and fine particles of carbon black. CONSTITUTION:The recording layer 2 which is changed in phase by a light beam and the protective layer 3 are provided on the transparent substrate 1 to form the recording medium. The layer 3 is formed of the hydrolyzed condensate of the metal org. compd. expressed by formula I or formula II (M is Al, Si, Ti, Zr, In, Sn and R1 to R4 and R5 to R7 are 1 to 18C alkyl group or aryl group) and the fine particles of the carbon black dispersed therein. The light transmitted through the layer 2 is, therefore, absorbed and converted to heat by the carbon black. The recording and erasing sensitivity is improved in this way and the protective layer is highly resistant to heat. In addition, this recording medium is formed by a coating method and, therefore, the productivity is improved.

30. 发明专利

JPH02285532A OPTICAL RECORDING MEDIUM AND RECORDING METHOD USING THE SAME 失效
公开(公告)号：JPH02285532A
公开(公告)日：1990-11-22
申请号：JP10457189
申请日：1989-04-26
申请人： RICOH KK
发明人： UEDA YUTAKA
IPC分类号： G11B11/10 , G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/24 , G11B7/26 , G11B7/30 , G11B11/105
摘要： PURPOSE:To detect the degradation of a recorded layer caused by reloading as early as possible and to avoid the worst that information are lost by providing a part, for which durability to the repetition of recording and erasing is weaker than the other part, in one part of each prescribed information unit. CONSTITUTION:Between an address part 11 and a data part 12 of a sector 1, an indicator signal recording part 13 is provided and width between lands 21 and 22 of the indicator signal recording part 13 is made narrow. Then, the indicator signal recording part 13 is formed so that a recording mark S of an indicator signal can cover a boundary between the land 21 or 22 and a group 3. As a result, a step is provided for the recording mark and in comparison with the flat mark of the other address part and data part, damage caused by thermal shock is received more easily. Thus, since the degradation of the recorded layer caused by the reloading can be detected as early as possible, the state that the information are lost can be prevented in advance.

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