Coloring Agent Containing Patents (Class 428/64.8)
-
Patent number: 7449279Abstract: An optical information recording medium including a substrate in which at least one of a groove and a pit is formed; a recording layer located overlying the substrate and including a dye; and a reflection layer located overlying the recording layer, wherein the optical information recording medium has an absorbance curve with an absorbance L of from 10 to 40% against light having a wavelength ? of from 645 nm to 670 nm, a ratio (Lmax/Lmin) of a maximum absorbance Lmax of the absorbance curve to a minimum absorbance Lmin of from 1.0 to 2.0 at the wavelength range of from 645 nm to 670 nm, and a reflectance of from 45 to 85% against the light having a wavelength ? of from 645 nm to 670 nm.Type: GrantFiled: August 22, 2005Date of Patent: November 11, 2008Assignee: Ricoh Company, Ltd.Inventors: Tohru Yashiro, Soh Noguchi, Tatsuya Tomura
-
Patent number: 7439008Abstract: The object of the present invention is to provide an optical recording medium in which a recording material of the optical recording medium has a high solubility in an organic solvent, so that the recording material can be shaped to film by a coating process and the recording material is excellent in light-resistance and stability during the preservation, so that the optical recording medium is applicable to the recordable DVD. For the object, the present invention provides the optical recording medium comprising a substrate and at least a recording medium disposed on the substrate, wherein the recording medium comprises at least one type of formazan-metal chelate dyes.Type: GrantFiled: September 27, 2005Date of Patent: October 21, 2008Assignee: Ricoh Company, Ltd.Inventors: Tatsuya Tomura, Tsutomu Sato, Yasunobu Ueno, Soh Noguchi
-
Patent number: 7432036Abstract: A non-resonant two-photon absorbing material is provided, comprising a methine dye undergoing a non-resonant two-photon absorption, in which the methine dye is preferably a cyanine dye, a merocyanine dye or an oxonol dye, and a non-resonant two-photon absorbing material is provided, comprising a non-resonant two-photon absorbing compound undergoing non-resonant two-photon absorption in the intermolecular aggregation state.Type: GrantFiled: October 6, 2003Date of Patent: October 7, 2008Assignee: FUJIFILM CorporationInventors: Hiroo Takizawa, Takeharu Tani, Naoki Morinaga
-
Patent number: 7427432Abstract: A dual-layer optical recording medium, which is formed by adhering a disk substrate (inverted-stack structure) formed by stacking a reflective layer (1) and a recording layer (1) on a substrate (1) and a disk substrate (conventional-stack structure) formed by sequentially stacking a recording layer (2) and a reflective layer (2) on a transparent substrate (2) with a transparent resin layer interposed therebetween, is prepared such that the transparent resin layer has a product obtained by multiplying the thickness by the elastic modulus at 25±5° C. falling within the range of not less than 2.0×104 MPa·?m to not more than 30.0×104 MPa·?m, resulting in suppressing excessive deformation involving an adjacent track portion produced by recording optical information in the recording layer (1) of the inverted-stack structure, thereby reducing crosstalk and providing satisfactory recording and/or reading characteristics in high-speed recording applications.Type: GrantFiled: April 28, 2006Date of Patent: September 23, 2008Assignee: Mitsubishi Kagaku Media Co., Ltd.Inventor: Shigeyuki Furomoto
-
Publication number: 20080226860Abstract: The present invention relates to a recording medium consisting of transparent substrate, recording layer, reflective layer, and protective layer, wherein the recording layer comprising at least one organic optical dye of structural formula (1): wherein each of R1, R2, R3, R4, R5, R6, X, and Y is defined as herein. The recording medium of present invention is useful as a write once recording medium, particularly is using as a recording medium for laser wavelength of 630 to 660 nm.Type: ApplicationFiled: March 14, 2008Publication date: September 18, 2008Inventor: Yen-Cheng TSAI
-
Patent number: 7425401Abstract: An optical recording medium containing a cyanine dyes of formula: Where at least one pair of R1 & R2 and R3 & R4 are benzyl moieties, rings A and B are each a benzene or naphthalene ring, Y1 and Y2 are C 1-30 organic groups and Anm? is an m valent anion, present in an integer p.Type: GrantFiled: July 27, 2004Date of Patent: September 16, 2008Assignee: Adeka CorporationInventors: Toru Yano, Koichi Shigeno, Mitsuhiro Okada
-
Patent number: 7419762Abstract: A media can comprise: a reflective layer, an oxygen penetrable UV coating, and a reactive layer disposed between the UV coating and the reflective layer. The reactive layer can comprise a reactive material that oxidizes with exposure to oxygen.Type: GrantFiled: November 12, 2004Date of Patent: September 2, 2008Assignee: General Electric CompanyInventors: Eric Michael Breitung, Eelco Michiel Sebastiaan van Hamersveld, Daniel Robert Olson, Marc Brian Wisnudel
-
Publication number: 20080182058Abstract: Metal alloy thin films are provided for use in the highly reflective and semi-reflective layers of optical discs. Alloys include silver alloyed with gold, palladium, copper, rhodium, ruthenium, osmium, iridium, and platinum. Other alloys include copper alloys with silver, magnesium, cadmium, aluminum, nickel, beryllium, zirconium and zinc. These alloys have moderate to high reflectivity and reasonable corrosion resistance in the ambient environment.Type: ApplicationFiled: May 15, 2006Publication date: July 31, 2008Inventor: Han H. Nee
-
Publication number: 20080182059Abstract: Provided is an optical recording medium having a recording layer, an intermediate layer, an adhesive layer and a cover sheet in this order on a substrate, wherein the thickness t1 of the intermediate layer after a high-temperature high-humidity storage test satisfies the relationship: 0.8t?t1?1.2t wherein t is the thickness of the intermediate layer before the high-temperature high-humidity storage test.Type: ApplicationFiled: April 12, 2006Publication date: July 31, 2008Applicant: FUJIFILM CORPORATIONInventors: Takeshi Kakuta, Kazutoshi Katayama, Shiho Kamisawa, Nobuyuki Kawano
-
Patent number: 7402375Abstract: The present invention provides organic dye compounds having their absorption maxima in a region ranging from the ultraviolet region to a relatively short wavelength visible region and uses thereof. The present invention provides specific monomethine cyanine dyes, light absorbents and optical recording media comprising the monomethine cyanine dyes, and a process for producing the monomethine cyanine dyes which comprises a step of reacting a quaternary ammonium salt of nitrogen atom-containing heterocyclic compound having a reactive methyl group with a quaternary ammonium salt of nitrogen atom-containing heterocyclic compound having an appropriate leaving group.Type: GrantFiled: May 16, 2003Date of Patent: July 22, 2008Assignee: Kabushiki Kaisha Hayashibara Seibutsu Kagaku KenkyujoInventors: Chiaki Kasada, Yasushi Aizawa, Toshio Kawata, Shigeo Yasui
-
Publication number: 20080160244Abstract: The invention provides dyes for optical disc recoding media, having the general formula: wherein m, n is independently selected from integers 0-3; X represents oxygen, sulfur, C—R1, or N—R2R3; Y is oxygen or sulfur; each of R1, R2, and R3 can be the same or different; and Z? is a cation. The dyes have a maximum absorption in wavelength of 300-500 nm and can be used in recording layers of high density optical disc recording media.Type: ApplicationFiled: December 27, 2006Publication date: July 3, 2008Inventors: Shin-Shin Wang, Wen-Ping Chu, Chien-Liang Huang, Wen-Yih Liao, Hui-Ping Tsai, Jong-Lieh Yang, An-Tse Lee
-
Patent number: 7390549Abstract: An asymmetric bis(indolestyryl) compound. The asymmetric bis(indolestyryl) compound has formula (I): wherein A and B comprise benzene, naphthalene, or heterocyclic ring containing O, S, or N, R1 and R1? are H, halogen atoms, C1-5 alkyl, nitro, ester, carboxyl, sulfo, C1-3 alkoxy, amine, alkylamine, cyano, C1-6 alkylsulfonyl, or C2-7 alkoxy carbonyl, R2, R2?, R3, and R3? comprise H, C1-6 alkyl, C6-18 aryl, C2-6 alkenyl, C3-6 cycloalkenyl, or C3-6 cycloalkyl, or C3-6 cycloalkyl containing hetero atom, R4 is H, hydroxyl, halogen atoms, or alkoxy, R5 and R5? comprise H, halogen atoms, C1-5 alkyl, nitro, C1-3 alkoxy, amine, cyano, C1-6 alkylsulfonyl, or C2-7 alkoxy carbonyl, n is 1˜18, Y is C(R6R7), C1-3 alkylamino or hetero atom, R6 and R7 are C1-3 alkyl, and Z? is an anion or an anionic organometallic complex. The invention also provides a high density recording medium utilizing the asymmetric bis(indolestyryl) compound.Type: GrantFiled: June 17, 2005Date of Patent: June 24, 2008Assignee: Industrial Technology Research InstituteInventors: Shin-Shin Wang, Chii-Chang Lai, Hui-Ping Tsai, Chien-Liang Huang, Wen-Yih Liao, Ming-Chia Lee
-
Patent number: 7384723Abstract: An optical information recording medium including a substrate having successively disposed thereon a recording layer, an interlayer, a pressure sensitive adhesive layer and a cover film in which information is recordable and reproducible by irradiating laser light and the pressure sensitive adhesive layer contains a polymer having a glass transition temperature Tg of 0° C. or lower, as well as a method for producing an optical information recording medium including adhering a cover layer to a surface of a recording layer so that a pressure sensitive adhesive layer is abutted on the surface of the recording layer, and an optical information recording medium produced by the method.Type: GrantFiled: January 22, 2003Date of Patent: June 10, 2008Assignee: FUJIFILM CorporationInventors: Takeshi Kakuta, Toshio Ishida, Takako Ozawa
-
Patent number: 7384677Abstract: A silver-based alloy thin film is provided for the highly reflective or the semi-reflective layer of optical discs. Alloy additions to silver include magnesium, gold, rhodium, ruthenium, osmium, platinum, palladium, copper, silicon, cadmium, tin, lithium, nickel, cobalt, manganese, indium, chromium, antimony, gallium, boron, molybdenum, zirconium, beryllium, titanium, aluminum, germanium and zinc. These alloys have moderate to high reflectivity and reasonable corrosion resistance in ambient environments.Type: GrantFiled: March 31, 2006Date of Patent: June 10, 2008Assignee: Target Technology Company, LLCInventor: Han H. Nee
-
Patent number: 7378219Abstract: The present invention relates to materials comprising hydrophilic polymers and immobilized proteorhodopsin and the use of such materials as an optical information carrier. The material comprises one or more hydrophilic polymers that are capable to form a homogeneous phase with proteorhodopsin prior to solidification to a solid form. The hydrophilic polymer, for example, is silica sol-gel, gelatin, polyvinylalcohol, agarose, agar, methyl cellulose, polyvinyl acetate, polyvinyl pyrrolidone, polyethylene glycol, or a mixture thereof. The solid material having immobilized proteorhodopsin is deposited on a substrate selected from the group consisting of glass, paper, metal, fabric material, plastic material, and used as an optical data storage material or a fraud-proof carrier. The present invention further provides a security ink comprising proteorhodopsin and one or more hydrophilic polymers.Type: GrantFiled: November 26, 2003Date of Patent: May 27, 2008Assignee: Genencor International, Inc.Inventors: Rasmus B. Jensen, Bradley R. Kelemen, Joseph C. McAuliffe, Wyatt Charles Smith
-
Patent number: 7378220Abstract: An optical information recording medium includes a substrate having disposed thereon a recording layer that is recordable by irradiating the recording layer with a laser having a wavelength of 450 nm or less. The recording layer contains a specific phthalocyanine derivative. An optical information recording method uses the medium.Type: GrantFiled: June 27, 2002Date of Patent: May 27, 2008Assignee: FUJIFILM CorporationInventor: Naoki Saito
-
Patent number: 7378221Abstract: Mixtures of metallocenyl phthalocyanines obtainable by reacting a mixture A comprising two phthalocyanines: with a metallocene derivative in the presence of a catalyst, and also oligomeric metallocenyl phthalocyanines, processes for preparing them, their use for, inter alia, optical recording and optical recording media.Type: GrantFiled: June 28, 2005Date of Patent: May 27, 2008Assignee: Ciba Specialty Chemicals CorporationInventors: Jürgen Beyrich, Rudolf Blattner, Jean-Luc Budry, Wolfgang Freitag, Colin Morton, Gerald Anthony Murphy, Beat Schmidhalter, Michael Schulz, Heinz Spahni, Christian Stern, Annemarie Wolleb, Heinz Wolleb, Roland Zoelper
-
Patent number: 7374804Abstract: An optically readable media (10) has an information-encoding layer (16) and at least one color-forming layer (12) that embodies an optical readout-limiting mechanism. In a first embodiment the at least one color-forming layer contains an additive that does not interfere with the optical readability of the media for a duration of a readout period. The additive, upon exposure to a source of optical radiation that is suitable for reversing the color-forming layer from an optical readout inhibiting state to an optical readout enabling state, undergoes a transformation that maintains the color-forming layer in the optical readout inhibiting state. More specifically, exposure to the source causes the color-forming layer to photobleach and the additive to oxidize, where the oxidation of the additive permanently inhibits the optical readability of the media. The additive may be a leuco dye.Type: GrantFiled: August 23, 2005Date of Patent: May 20, 2008Assignee: Flexplay Technologies, Inc.Inventor: Marianne Krieg-Kowald
-
Patent number: 7371449Abstract: In an optical recording medium having two recording layers of a first recording layer and a second recording layer, the second recording layer contains metallized azo dyes represented by the following general formula (I) or (II), and recording characteristics of the second recording layer are improved by having optical density of 1.3 times as large as, or 1.3 times greater than, that of a dye contained in the first recording layer. (In this regard, rings A1 and A2 are nitrogen-containing heteroaromatic rings, rings B1 and B2 are aromatic rings, and X is alkyl group substituted by at least two fluorine atoms).Type: GrantFiled: March 31, 2006Date of Patent: May 13, 2008Assignee: Mitsubishi Kagaku Media Co., Ltd.Inventors: Yoshihiro Noda, Shigeyuki Furomoto
-
Patent number: 7368221Abstract: Copy-protected optical medium utilizing a composition comprising a transient optical state change security materials constrained to change the optical state light absorption at a wavelength of about 400 nm and an electron transfer agent.Type: GrantFiled: September 23, 2005Date of Patent: May 6, 2008Assignee: Verification Technologies, Inc.Inventor: Richard H. Selinfreund
-
Patent number: 7364780Abstract: A medium includes a plurality of Fabry-Perot cavities of varying depths. The cavities correspond to different colors which are produced by the respective cavities under incident light. A thermo-sensitive material covers the plurality of cavities. The cavities are selectively exposed by heating portions of said thermo-sensitive material to alter the thermo-sensitive material where heated thereby forming an image.Type: GrantFiled: December 8, 2004Date of Patent: April 29, 2008Inventors: Andrew L. Van Brocklin, Timothy F. Myers
-
Patent number: 7361449Abstract: The present invention provides an optical information recording medium comprising a substrate having disposed thereon a recording layer, wherein the recording layer includes a recording dye represented by the following formula (I) or (II): wherein A represents an aromatic ring which may have a substituent, B represents an aromatic ring which may have a substituent other than a hydroxyl group, n is an integer of 1 to 3, m is an integer of 2 to 6, L represents a bivalent linking group, which may have a substituent, or a single bond, and V represents an aromatic ring, which may have a substituent other than L.Type: GrantFiled: May 26, 2004Date of Patent: April 22, 2008Assignee: FUJIFILM CorporationInventor: Tetsuya Watanabe
-
Patent number: 7354694Abstract: The present invention provides styryl dyes which have absorption maxima at a wavelength of 400 nm or less and are sensitive to a laser beam with a wavelength of 450 nm or less, light absorbents and optical recording media which comprise the styryl dyes, and a process for producing the styryl dyes which comprises reacting with an aldehyde compound a quaternary ammonium salt of nitrogen atom containing heterocyclic compound having an active methyl or active methylene group.Type: GrantFiled: November 24, 2000Date of Patent: April 8, 2008Assignee: Kabushiki Kaisha Hayashibara Seibutsu Kagaku KenkyukoInventors: Chiaki Kasada, Toshio Kawata, Kentaro Yano, Shigeo Yasui
-
Patent number: 7351461Abstract: An article comprising the compound of Formula (I) wherein X is hydrogen or a radical of Formula (II), R1 independently at each occurrence is a C1-C20 aliphatic radical, a C3-C10 cycloaliphatic radical, or a C3-C10 aromatic radical; R2, R3, R4 and R5 are independently at each occurrence a halogen, a nitro group, a cyano group, a hydroxy group, a C1-C20 aliphatic radical, a C3-C20 cycloaliphatic radical, or a C6-C20 aromatic radical; and “n”, “q”, and “p” are each independently integers having a value of 0 to 3, and “m” is an integer having a value of 0 to 4.Type: GrantFiled: June 5, 2007Date of Patent: April 1, 2008Assignee: General Electric CompanyInventors: Yogendrasinh B. Chauhan, Adil Minoo Dhalla, Rahul R. Khanwelkar, Krishnamoorthy Sivakumar, Kiran Arunkumar Puthamane
-
Patent number: 7348125Abstract: Disclosed is an optical information recording medium comprising a substrate having provided thereon a recording layer capable of recording information by laser beam irradiation, wherein the recording layer contains at least one compound represented by the following general formula (I): The symbols in the formula (I) are defined in the specification. Also disclosed is a method for recording optical information using the optical information recording medium.Type: GrantFiled: July 25, 2002Date of Patent: March 25, 2008Assignee: FUJIFILM CorporationInventors: Shinnichi Morishima, Michihiro Shibata
-
Patent number: 7341820Abstract: The present invention is an optical information recording medium comprising a substrate having disposed in an order thereon a recording layer, an interlayer, and a cover layer, wherein recording and reproduction are carried out by the irradiation with a laser light having a wavelength in the range of 380 to 500 nm through a lens having a lens numerical aperture NA of 0.7 or more, wherein the recording layer is a layer of an organic substance and the thickness of the interlayer is within a range of 1 nm to 9 nm.Type: GrantFiled: November 29, 2002Date of Patent: March 11, 2008Assignee: FUJIFILM CorporationInventors: Toshio Ishida, Takeshi Kakuta, Shinji Saito
-
Patent number: 7332261Abstract: A phthalocyanine compound represented by the following general formula (I) and the mixture thereof, and an optical recording medium containing the compound/mixture in its recording layer. wherein in formula (I), M is two hydrogen atoms, a divalent metal atom, a mono-substituted trivalent metal atom, a di-substituted tetravalent metal atom, or an oxymetal, and L1, L2, L3 and L4 are each independently formula (a), formula (b), or formula (c): wherein X, Y, Z and R are defined.Type: GrantFiled: February 14, 2003Date of Patent: February 19, 2008Assignee: Ciba Specialty Chemicals CorporationInventors: Kazuhiro Seino, Shinichi Nakagawa, Tsutami Misawa, Satoshi Kinoshita, Akihiro Kosaka, Hiroshi Terao, Yojiro Kumagae
-
Publication number: 20080014401Abstract: A first write-once type recording layer, on which information can be recorded by being irradiated with a laser beam having a wavelength of not more than 450 nm, is provided on a first substrate of a first optical information-recording medium. A dye compound, which contains boron as a constitutive element, is contained in the first write-once type recording layer. Preferred examples of the dye compound include boronic acid. In particular, it is preferable to use a compound having a boroxin moiety formed by condensation of boronic acid. The condensation of boronic acid can be advanced such that a solution, which is prepared by dissolving boronic acid in a solvent, is applied onto the first substrate to form the first write-once type recording layer, and then the first write-once type recording layer is subjected to an annealing treatment.Type: ApplicationFiled: July 2, 2007Publication date: January 17, 2008Applicant: FUJIFILM CorporationInventors: Keita Takahashi, Kazutoshi Katayama
-
Patent number: 7316836Abstract: An optical recording medium comprises a transmission substrate and a recording layer formed on the transmission substrate, the recording layer containing at least a dye material expressed by a general formula shown at the following chemical formula (in the chemical formula 1, R1 represents alkyl group having carbon numbers 1 to 4, R2, R3 represent alkyl group having carbon numbers 1 to 4, benzyl group or groups combined to form 3 to 6 rings, Y1 and Y2 independently represent organic groups and X represent ClO4, BF4, PF6, SbF6) and a dye material expressed by a general formula represented by the following chemical formula 2(in the chemical formula 2, R1 and R2 represent alkyl groups having carbon numbers 1 to 4, benzyl groups or groups combined to form 3 to 6 rings, Y1, Y2 independently represent organic groups and X represent ClO4, BF4, PF6, SbF6): In a write once type optical recording medium such as DVD?R and DVD+R, satisfactory recording characteristics can be obtained from low-speed recording to high-Type: GrantFiled: October 27, 2004Date of Patent: January 8, 2008Assignee: Sony CorporationInventors: Yutaka Wada, Masatsugu Suwabe, Toshihiro Akimori, Junko Shimada, Keiji Oya, Koichi Shigeno, Toru Yano
-
Patent number: 7316890Abstract: Indolestyryl compounds and use thereof for a high density recording media and method for fabricating the same. The indolestyryl compounds exhibit strong absorbance in the visible light region (400˜700 nm) of the spectrum, resistance to heat and light, high light sensitivity, and excellent solubility, resulting from their special chemical configuration. Furthermore, the indolestyryl compounds can be used as recording layer materials in high density recording media for matching a reading laser wavelength and enhancing the reflective index and carrier-to-noise ratio (CNR) of the high density recording media. Accordingly, the recording sensitivity and the readout characteristics of high density recording media comprising the indolestyryl compound according to the present invention can be improved.Type: GrantFiled: April 26, 2004Date of Patent: January 8, 2008Assignee: Industrial Technology Research InstituteInventors: Shin-Shin Wang, Hui-Ping Tsai, Chii-Chang Lai, Jie-Hwa Ma, Jong-Lieh Yang, Tzuan-Ren Jeng, Wen-Yih Liao, Chien-Liang Huang, Ming-Chia Lee, Chuen-Fuw Yan
-
Publication number: 20070243489Abstract: A first optical information-recording medium has, on a first substrate, a first write-once type recording layer capable of recording information by being irradiated with a laser beam of not more than 440 nm, wherein the first write-once type recording layer contains a metal complex having a ligand of a compound represented by the following general formula (I): wherein Z represents: wherein each of X, Y1, Y2 independently represents an atom group for forming a five-membered or six-membered heterocyclic ring which may be condensed.Type: ApplicationFiled: April 13, 2007Publication date: October 18, 2007Applicant: FUJIFILM CorporationInventor: Tetsuya Watanabe
-
Patent number: 7282320Abstract: A three dimensional optical data storage and retrieval system that includes a three dimensional optical data storage medium and an apparatus for providing access to data stored on the medium. The data storage medium includes an optical data storage material which either a low molecular weight or polymeric glassy solid that are capable of undergoing multi-photon excitation that are energetically different in the write and read cycles. The optical data storage materials provide substantially higher storage capacities relative to conventional materials, and show high robustness in that written and stored data can undergo multiple read cycles without erasure or overwriting. An apparatus for data recording and accessing stored data on the medium includes a controllable variable energy photo-emitting excitation source and an emission photo-detector.Type: GrantFiled: November 8, 2005Date of Patent: October 16, 2007Assignee: The Trustees of Boston CollegeInventors: John T. Fourkas, Christopher E. Olson, Michael J. R. Previte
-
Patent number: 7270864Abstract: For improving the jitter property and ensuring the high reliability of an optical disk, a metal film containing phosphorus is disposed in a reflective layer. The layer has a hardness of 60 mgf/?m2 or more as nano indentation hardness, and an adhesive layer used for bonding has a glass transition temperature of 100° C. or higher but 200° C. or lower, an elastic modulus at 25 to 80° C. of 1000 MPa or more, and an adhesion strength of 4N or more. The dye for the dye recording layer has a water solubility of 20% or less as measured as light absorbance of hot water in which the dye recording layer is soaked.Type: GrantFiled: September 29, 2005Date of Patent: September 18, 2007Assignee: Taiyo Yuden Co., Ltd.Inventors: Fumi Hara, Sachiko Ishibashi, Masashi Satoh, Toru Fujii, Yuji Arai
-
Publication number: 20070202441Abstract: The present invention relates to an optical storage medium using nanoparticles, and more specifically to a multi-layer optical storage medium. According to the invention, the optical storage medium has two or more storage layers with nanoparticles, each storage layer being made of a dielectric material, wherein the dielectric materials of at least two storage layers have a different dielectric permittivity.Type: ApplicationFiled: February 20, 2007Publication date: August 30, 2007Inventor: Nicolas Richard
-
Patent number: 7247417Abstract: The present invention provides an optical recording medium that includes a recording layer composed mainly of an organic compound and can utilize blue-violet semiconductor laser light (390 to 420 nm in wavelength) as recording/reproducing laser light. The present invention also provides an optical recording/reproducing method using the optical recording medium. The optical recording medium 1 comprises at least a supporting substrate 2; a recording layer 3 on the supporting substrate 2, the recording layer 3 containing an organic compound as a major component; and a light-transmitting layer 5 on the recording layer 3, the light-transmitting layer 5 being capable of transmitting laser light with a wavelength of 390 to 420 nm for recording and reproducing information.Type: GrantFiled: September 9, 2003Date of Patent: July 24, 2007Assignee: TDK CorporationInventors: Narutoshi Fukuzawa, Takashi Horai, Hiroshi Take
-
Patent number: 7244486Abstract: An organic dye type optical recording medium capable of recording or reading information by a blue laser having a shorter wavelength, is provided. An optical recording medium comprising a substrate and a recording layer capable of recording or reading information by a laser, formed on the substrate, characterized in that the recording layer contains a compound represented by the following formula (1): wherein each of R1 to R6 which are independent of one another, is a hydrogen atom or a linear or branched alkyl group which may be substituted, each of k and n which are independent of each other, is an integer of from 0 to 2, provided 0?k+n?4, each of l and m which are independent of each other, is 0 or 1, provided 1?l+m?2, each of rings A and B which are independent of each other, is an aromatic ring which may have optional substituents, provided that such optional substituents may be bonded to each other to form a ring.Type: GrantFiled: January 25, 2005Date of Patent: July 17, 2007Assignee: Mitsubishi Chemical CorporationInventors: Takashi Miyazawa, Yutaka Kurose
-
Patent number: 7241555Abstract: The present invention provides an optical information recording medium including a substrate; and a recording layer provided onto the substrate, to which information can be recorded and from which the information can be replayed by irradiating the medium with a laser having a short wavelength, specifically a highly versatile semiconductor laser having a wavelength near 405 nm, wherein the recording layer includes a specific compound, and the recording medium has superior recording properties. An information recording method capable of recording information at high density using a laser having a short wavelength is also provided.Type: GrantFiled: August 5, 2003Date of Patent: July 10, 2007Assignee: Fujifilm CorporationInventors: Tetsuya Watanabe, Masaki Okazaki
-
Patent number: 7240352Abstract: An optical recording medium which comprises a print-receiving layer as the outermost layer on the side opposite to the light incidence side, wherein a pattern is formed on the print-receiving layer.Type: GrantFiled: March 15, 2006Date of Patent: July 3, 2007Assignee: Mitsubishi Kagaku Media Co., Ltd.Inventors: Hideharu Takeshima, Mitsugu Wakabayashi
-
Patent number: 7238461Abstract: An optical information-recording medium which contains a dye having at least two chromophores bonded to each other without any conjugated bond intervening between those chromophores.Type: GrantFiled: December 1, 2003Date of Patent: July 3, 2007Assignee: Fujifilm CorporationInventors: Masaharu Akiba, Shin-ichi Morishima, Yoshio Inagaki, Hisashi Mikoshiba, Michihiro Shibata
-
Patent number: 7238460Abstract: Disclosed is an optical recording medium, comprising a polymer alloy forming a phase-separated domain structure of a coating object, and a volatile substance interacting with the polymer alloy. The volatile substance in a vapor state is deposited on the surface of specific phase-separated domain, and dispersedly infiltrated into the phase-separated domain. The phase-separated domain and the volatile substance chemically interact with each other. The optical recording medium is operable to perform optical recording by utilizing change in the transmittance, reflectance, refractive index or surface potential thereof in response to irradiation of ultraviolet light, visible light, or infrared light from outside. The present invention can provide an optical recording medium suitable for high-density recording in a wide wavelength range.Type: GrantFiled: September 4, 2003Date of Patent: July 3, 2007Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Toshiko Mizokuro, Takashi Hiraga, Noritaka Yamamoto, Hiroyuki Mochizuki, Shin Horiuchi, Norio Tanaka
-
Patent number: 7226719Abstract: The present invention provides a formulation for a reactive dye layer for a limited-play optical storage medium, the reactive formulation including at least one carrier material or curable acrylate monomer, at least one reactive material disposed within the carrier material or acrylate monomer, and at least one photo-bleaching retarder material disposed within the at least one adhesive material. The at least one photo-bleaching retarder material includes at least one polymeric polyhydroxy compound selected from the group consisting of polyhydroxystyrenes, cellulose, and functionalized cellulose derivatives.Type: GrantFiled: September 8, 2003Date of Patent: June 5, 2007Assignee: General Electric CompanyInventors: Marc Brian Wisnudel, Daniel Robert Olson, David Andrew Simon, Kathryn Lynn Longley, Edward Paul Lindholm
-
Patent number: 7226720Abstract: A limited play optical storage medium for data is described which comprises a first substrate, a reflective layer, a data layer disposed between said substrate and said reflective layer; a reactive layer comprising at least one carrier, and at least one reactive material, and an optically transparent second substrate comprised of a polymethacrylate copolymer or blend comprising a polymethacrylate copolymer or homopolymer. The second substrate is disposed between the reactive layer and a laser incident surface and is tailored to provide an oxygen permeability in a range between about 0.1 Barrers and about 1.35 Barrers at 25° C.Type: GrantFiled: September 8, 2003Date of Patent: June 5, 2007Assignee: General Electric CompanyInventors: Marc Brian Wisnudel, Kathryn Lynn Longley
-
Patent number: 7223521Abstract: Squarylium-metal chelate compounds as recording materials for optical recording media, and optical recording media using these compounds, which have excellent recording properties, light resistance and storage stability. The squarylium-metal chelate compound is represented by following Structural Formulas (1) and (2): In the formula (1), M represents a metal atom capable of coordinating; “a”, “b” and “c” each represents a squarylium dye ligand of formula (2), where “a” is different from “b”; and “c” may be the same as or different from “a” or “b”; and “m” represents 0 or 1. In the formula (2), R1 and R2 are the same or different and each represents an alkyl group, aralkyl group, aryl group or heterocyclic group, each of which may be substituted; and X represents an aryl group which may be substituted, a heterocyclic group which may be substituted, or Z3=CH—, wherein Z3 represents a heterocyclic group which may be substituted.Type: GrantFiled: February 11, 2004Date of Patent: May 29, 2007Assignees: Ricoh Company, Ltd., Kyowa Hakko Kogyo Co., Ltd., Kyowa Yuka Co., Ltd.Inventors: Tohru Yashiro, Tomomi Ishimi, Tatsuo Mikami, Ikuo Shimizu, Motoharu Kinugasa, Hiroshi Toyoda
-
Patent number: 7205039Abstract: An optical information recording medium whose recording layer includes a phthalocyanine derivative having a substituent of the following formula (I): (in the formula (I), R1, R2 and R3 each independently represent a substituent other than a hydrogen atom). A dye compound represented by the following formula (II): (in the formula (II), M represents a metal or a metal oxide each of which may have a ligand. R4, R5 and R6 each independently represent a substituent other than a hydrogen atom, and n is an integer of from 1 to 8).Type: GrantFiled: October 18, 2004Date of Patent: April 17, 2007Assignee: FujiFilm CorporationInventors: Tetsuya Watanabe, Naoki Saito
-
Patent number: 7166415Abstract: A phase-change recording material used for an information recording medium utilizing a crystalline state as a non-recorded state and an amorphous state as a recorded state, which has the composition of the following formula (1) as the main component: (Sb1?xSnx)1?y?w?zGeyTewM1z??formula (1) wherein each of x, y, z and w represents atomicity, x, z and w are numbers which satisfy 0.01?x?0.5, 0?z?0.3 and 0?w?0.1, respectively, and the element M1 is at least one element selected from the group consisting of In, Ga, Pt, Pd, Ag, rare earth elements, Se, N, O, C, Zn, Si, Al, Bi, Ta, W, Nb and V, and (I) when z=0 and w=0, y is a number which satisfies 0.1?y?0.3, (II) when 0<z?0.3 and w=0, y is a number which satisfies 0.05?y?0.3, and (III) when 0?z?0.3 and 0<w?0.1, y is a number which satisfies 0.01?y?0.3.Type: GrantFiled: March 5, 2003Date of Patent: January 23, 2007Assignee: Mitsubishi Kagaku Media Co., Ltd.Inventors: Michikazu Horie, Takashi Ohno
-
Patent number: 7163730Abstract: An optical information storage medium includes a first substrate, a first recording layer, a first reflective layer, a spacer layer, a second recording layer, a second reflective layer, and a second substrate. In this case, the first recording layer is disposed above the first substrate. The first reflective layer is disposed above the first recording layer. The spacer layer is disposed above the first reflective layer. The second recording layer is disposed above the spacer layer, and the second recording layer is made of an inorganic material. The second reflective layer is disposed above the second recording layer. The second substrate is disposed above the second reflective layer.Type: GrantFiled: August 12, 2004Date of Patent: January 16, 2007Assignee: Prodisc Technology Inc.Inventor: Tsai-Chu Hsiao
-
Patent number: 7144677Abstract: This invention provides a recording method for an optical recording medium having superior high-speed recording, and a playable optical recording medium in which data pits are formed by this recording method. For this purpose, recording materials having special thermal decomposition characteristics are used for the recording layer of the optical recording medium, and the recording pulse pattern at the inner circumference and outer circumference of the optical recording medium is adjusted to be suitable for high-speed recording conditions.Type: GrantFiled: March 18, 2002Date of Patent: December 5, 2006Assignee: Ricoh Company, Ltd.Inventor: Tohru Yashiro
-
Patent number: 7129019Abstract: The present invention provides an optical information recording medium that includes a substrate including a groove with a track pitch of 200 to 400 nm and a groove depth of 20 to 150 nm and having successively disposed thereon a light reflecting layer, a recording layer containing a dye in which information is recorded by irradiation with a laser beam having a wavelength of no greater than 450 nm, an adhesive layer, and a cover layer with a thickness of 0.01 to 0.5 mm. A surface of the optical information recording medium on a side disposed with the cover layer has a center surface average roughness (SRa1) of no greater than 3.0 nm when measured over a large surface area and a center surface average roughness (SRa2) of no greater than 3.0 nm when measured over a minute surface area.Type: GrantFiled: June 21, 2002Date of Patent: October 31, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Takeshi Kakuta, Shinji Saito, Toshio Ishida, Takako Ozawa, Hiroaki Doushita
-
Patent number: 7125594Abstract: A write-once optical recording medium has a transparent resin substrate having a concentric groove or a spiral groove and having recessed cells defining recording regions that are arranged in the groove, a recording film comprising an organic dye formed to fill the cells, and a metal reflection film formed on the recording film.Type: GrantFiled: July 23, 2004Date of Patent: October 24, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Seiji Morita, Masatoshi Sakurai, Katsuyuki Naito
-
Patent number: 7101655Abstract: A fluorescent composition for use with single-layer and multilayer optical discs for CD ROM, DVD and WORM type devices with fluorescent reading is disclosed. The composition comprises a fluorescent dye, film-forming polymer, plasticizer, surfactant and light stabilizer. A method of increasing fluorescent signal level from the optical discs both for single-layer and multilayer optical memory materials is also disclosed along with the resulting optical discs.Type: GrantFiled: January 28, 2000Date of Patent: September 5, 2006Assignee: D Data Inc.Inventors: Mark Alperovich, Irene Zuhl, Eugene Levich, Arie Chaikin