Cyanine Chromophore Patents (Class 430/270.2)
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Patent number: 8927082Abstract: To provide an optical recording medium including: a substrate having at least one of grooves and pits on a surface thereof; and a dye recording layer formed over the substrate, wherein the dye recording layer comprises a cyanine dye represented by the following General Formula (I), a squaric acid complex represented by the following General Formula (II), and an amine compound.Type: GrantFiled: February 15, 2007Date of Patent: January 6, 2015Assignee: Ricoh Company, Ltd.Inventors: Tohru Yashiro, Satoshi Mizukami
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Patent number: 8927193Abstract: To provide a coloring photosensitive composition and a lithographic printing plate precursor, ensuring that coloring stability after exposure by infrared laser exposure is good and high coloring is obtained even when exposed after the elapse of time. These can be a coloring photosensitive composition containing a microgel encapsulating (A) a polymer having a glass transition temperature of 50° C. or more, (B) a photoinitiator, and (C) an infrared absorbing dye, and a lithographic printing plate precursor having an image-recording layer containing the composition.Type: GrantFiled: March 15, 2011Date of Patent: January 6, 2015Assignee: FUJIFILM CorporationInventors: Shota Suzuki, Toshihide Aoshima
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Patent number: 8778590Abstract: A lithographic printing plate precursor comprising a coating provided on a support having a hydrophilic surface, the coating containing thermoplastic polymer particles and an IR-dye characterized in that the IR-dye contains a structural element according to Formula I wherein A represents hydrogen, halogen or a monovalent organic group; Y and Y? independently represent —CH— or —N—; R1 and R2 independently represent hydrogen, an optionally substituted alkyl or aryl group or represent the necessary atoms to form a ring; * represents the linking positions to the rest of the molecule.Type: GrantFiled: December 3, 2009Date of Patent: July 15, 2014Assignee: Agfa Graphics NVInventor: Paul Callant
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Patent number: 8722308Abstract: An aluminum-containing substrate can be provided for use in lithographic printing plate precursors. Before radiation-sensitive layers are applied, a grained and sulfuric acid anodized aluminum-containing support is treated with an alkaline or acidic pore-widening solution to provide its outer surface with columnar pores. The diameter of the columnar pores at their outermost surface is at least 90% of the average diameter of the columnar pores. Directly on this treated surface, a hydrophilic layer is applied, which hydrophilic layer contains a non-crosslinked hydrophilic polymer having carboxylic acid side chains.Type: GrantFiled: August 31, 2011Date of Patent: May 13, 2014Assignee: Eastman Kodak CompanyInventor: Koji Hayashi
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Patent number: 8703381Abstract: On-press developable, negative-working lithographic printing plate precursors have a sulfuric acid anodized aluminum-containing substrate in which the oxide layer pores have been widened using an acidic or alkaline treatment. Over the widened pores, a hydrophilic coating is applied, which coating comprises a non-crosslinked hydrophilic polymer having carboxylic acid side chains. This particular substrate provides improved adhesion and printing durability for on-press development and printing.Type: GrantFiled: August 31, 2011Date of Patent: April 22, 2014Assignee: Eastman Kodak CompanyInventor: Koji Hayashi
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Patent number: 8685622Abstract: a method for preparing a lithographic printing plate that includes imagewise exposing a lithographic printing plate precursor comprising a coating provided on a support having a hydrophilic surface, the coating containing thermoplastic polymer particles and an infrared radiation absorbing dye characterized in that the coating further comprises a phenolic stabilizer.Type: GrantFiled: April 21, 2010Date of Patent: April 1, 2014Assignee: Agfa Graphics NVInventors: Johan Loccufier, Paul Callant, Jens Lenaerts, Ineke Van Severen
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Patent number: 8632947Abstract: The invention provides a near infrared absorption polymer comprising at least two different pendent infra-red chromophoric moieties covalently bonded to the backbone of an alkali-soluble resin, at least one of which is an indole cyanine dye and the other of which is a benz[e]-indole cyanine dye. When used in the coating of a heat sensitive positive working lithographic printing plate precursor the stabilization time needed after manufacture is significantly reduced, avoiding further conditioning processes before use. The precursors are preferably imagewise exposed with a near-infrared laser emitting at between 780 nm and 850 nm.Type: GrantFiled: November 8, 2005Date of Patent: January 21, 2014Assignee: Ipagsa Industrial, S.L.Inventors: Peter Jonathan Bentley, My T. Nguyen
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Patent number: 8431207Abstract: The present invention provides an optical recording material allows for obtaining excellent recording signal properties even at high-speed recording and is excellent in durability in both a single-sided single layer optical recording medium and a single-sided two-layer optical recording medium having a first recording layer and a second recording layer. The optical recording material contains a cyanine compound having a specific structure and a squarylium compound as dyes for optical recording layers.Type: GrantFiled: January 10, 2008Date of Patent: April 30, 2013Assignee: Ricoh Company, Ltd.Inventors: Tohru Yashiro, Fumiya Ohmi, Satoshi Mizukami, Yuki Nakamura, Masahiro Hayashi, Ippei Matsumoto
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Patent number: 8350015Abstract: An objective of this invention is to extend the range of choosing organic dye compounds as radiation-absorbing agents in a variety of fields by providing a novel organic dye compound which absorbs short-wavelength visible radiation and exhibits a superior in optical resistance, solubility in solvents, and heat characteristics required in a novel field in which the organic dye compound is applied: The objective is attainable by providing a cyanine dye which has a specific structure and exhibits a major adsorption maximum at a wavelength longer than 400 nm in a solution.Type: GrantFiled: February 24, 2005Date of Patent: January 8, 2013Assignee: Kabushiki Kaisha Hayashibara Seibutsu Kagaku KenkyujoInventors: Yasushi Aizawa, Yoshinori Koyama, Ayashi Noguchi
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Patent number: 8206806Abstract: A cyanine compound is represented by formula (I): A1: benzene or naphthalene ring. A3: 5- or 6-membered ring. R1, R2: hydrogen atom and the like. R7: an alkyl group and the like. R12: a substituent by formula (II) or (II?). R20: a hydrogen atom and the like. Anq-: a q-valent anion. q: 1 or 2; p: a coefficient for neutral charge. In formula (II): bond between L and T is a double, conjugated double, or triple bond. L: carbon atom. T: carbon, oxygen, sulfur, or nitrogen atom. x, y, z: 0 or 1. s: 0-4. R13: hydrogen atom and the like. R14, R15, and R16: hydrogen atom and the like. In formula (II?), the bond between L? and T? is a double or conjugated double bond. L?: carbon atom. T?: carbon, oxygen, nitrogen atom. s?: 0-4. Ring containing L? and T?: 5-membered ring, may contain a heteroatom.Type: GrantFiled: March 23, 2007Date of Patent: June 26, 2012Assignee: Adeka CorporationInventors: Toru Yano, Satoshi Yanagisawa, Yohei Aoyama, Koichi Shigeno
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Patent number: 8178282Abstract: A heat-sensitive imaging element includes an IR dye, and more particularly a heat-sensitive lithographic printing plate precursor includes the IR dye. A method for making the lithographic printing plate produces a print-out image of high contrast upon exposure to IR-radiation or heating.Type: GrantFiled: June 20, 2006Date of Patent: May 15, 2012Assignee: Agfa Graphics NVInventors: Paul Callant, Hieronymus Andriessen, Alexander Williamson, Christel Geukens, Jos Louwet
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Patent number: 8092891Abstract: A cyanine compound is represented by: wherein, R11 and R12 each independently represent a hydrogen atom, a hydroxyl group, a halogen atom, a nitro group, a cyano group, an organic group having 1 to 30 carbon atoms, or a group represented by the following general formula (II), (II?), or (III); R13 and R14 each independently represent a hydrogen atom, an organic group having 1 to 30 carbon atoms, or a substituent represented by the following general formula (III); R11 and R12 may be connected together to form a ring structure; R19 represents a hydrogen atom or an organic group having 1 to 30 carbon atoms; R13 and R14 may be connected together to form a heterocycle; N—R13 may be connected together with a methylene group in a polymethine chain to form a heterocycle; Z00 is an organic group having 1 to 10 carbon atoms; m is 0 or 1; s is 2 to 8; Anq? represents an anion having a valence of q; q is 1 or 2; and p represents a coefficient for maintaining charge neutrality.Type: GrantFiled: July 10, 2007Date of Patent: January 10, 2012Assignee: Adeka CorporationInventor: Satoshi Yanagisawa
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Patent number: 7914969Abstract: According to one embodiment, a write-once type information storage medium comprises a recording layer which is formed by mixing a plurality of organic dye based recording materials whose molecular weights are different from each other, and wherein a mixture ratio of organic dye based recording materials whose molecular weight is small is larger than a mixture ratio of organic dye based recording materials whose molecular weight is large.Type: GrantFiled: April 13, 2006Date of Patent: March 29, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Hideo Ando, Seiji Morita, Koji Takazawa, Yasuaki Ootera, Naoki Morishita, Kazuyo Umezawa
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Patent number: 7781044Abstract: A recording layer including a novel organic compound for a high density optical recording medium is provided. The information may be recorded on the recording layer at a 2× speed or higher speed with a relatively lower writing power so that heat distribution of the recording layer in the irradiated area is not likely to become steep both in time and space. The organic compound incorporated in the recording layer has the following general chemical structural formula (I).Type: GrantFiled: September 5, 2007Date of Patent: August 24, 2010Assignee: Industrial Technology Research InstituteInventors: Ming-Chia Li, An-Tse Lee, Chien-Liang Huang, Chung-Ta Cheng, Kuo-Chi Chiu, Tzuan-Ren Jeng
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Publication number: 20100118680Abstract: The present invention provides an optical recording material allows for obtaining excellent recording signal properties even at high-speed recording and is excellent in durability in both a single-sided single layer optical recording medium and a single-sided two-layer optical recording medium having a first recording layer and a second recording layer. The optical recording material contains a cyanine compound having a specific structure and a squarylium compound as dyes for optical recording layers.Type: ApplicationFiled: January 10, 2008Publication date: May 13, 2010Applicant: Ricoh Company Ltd.Inventors: Tohru Yashiro, Fumiya Ohmi, Satoshi Mizukami, Yuki Nakamura, Masahiro Hayashi, Ippei Matsumoto
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Patent number: 7682773Abstract: The cyanine compound of the present invention is represented by general formula (I) below and suitable as an optical recording material used in a recording layer of optical recording media on which recording and play-back are conducted with laser beam. The cyanine compound of the present invention particularly exhibits appropriate thermal decomposition behavior to attain sensitivity compatible with high-speed recording.Type: GrantFiled: October 13, 2005Date of Patent: March 23, 2010Assignee: Adeka CorporationInventors: Mitsuhiro Okada, Toru Yano, Koichi Shigeno
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Patent number: 7674569Abstract: An optical recording material for use in an optical recording layer of an optical recording medium comprising the optical recording layer provided on a substrate, the optical recording material comprising a cyanine compound represented by general formula (I): wherein rings A and B each represent a substituted or unsubstituted benzene or naphthalene ring; X represents O, S, Se, CR3R4 or NY; one of R1 and R2 represents a specific group of formula (II) or (III), with the other representing a C1 to C30 organic group; R3 and R4 each represent a C1 to C30 organic group; Y, Y1, and Y2 each represent a hydrogen atom or a C1 to C30 organic group; Z represents a hydrogen atom, a halogen atom or a cyano group; Anm? represents an m-valent anion; m represents an integer of 1 or 2; and p represents a coefficient maintaining charge neutrality.Type: GrantFiled: June 7, 2005Date of Patent: March 9, 2010Assignee: Adeka CorporationInventors: Toru Yano, Koichi Shigeno
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Patent number: 7598360Abstract: A bisstyryl compound. The bisstyryl compound has formula (I): wherein Z1 and Z2 are benzene, naphthalene, or heterocyclic ring, R1 is H, C1-5 alkyl, hydroxyl, halogen atoms, or alkoxy, R2 is H, halogen atoms, C1-5 alkyl, nitro, ester, carboxyl, sulfo, sulfonamide, sulfuric ester, amide, C1-3 alkoxy, amino, alkylamino, cyano, C1-6 alkylsulfonyl, or C2-7 alkoxy carbonyl, R3, R4, R5, and R6 are H, halogen atoms, alkyl, aralkyl, or heterocyclic ring containing O, S, or N, or R3 and R4 are joined to a nitrogen atom or R5 and R6 are joined together to form a ring, R7 and R8 are H or alkyl, W is nitrogen with or without Z1 and Z2 or aromatic group without Z1 and Z2, Y is carbon, oxygen, sulfur, selenium, —NR, or —C(CH3)2, m is 1-3, n is 1-18, and X1 and X2 are anionic groups or anionic organometallic complexes.Type: GrantFiled: October 21, 2005Date of Patent: October 6, 2009Assignee: Industrial Technology Research InstituteInventors: Shin-Shin Wang, Chien-Wen Chen, Jong-Lieh Yang, Chii-Chang Lai, Hui-Ping Tsai, Wen-Ping Chu, Wen-Yih Liao, Chien-Liang Huang, Tzuan-Ren Jeng, Ching-Yu Hsieh, An-Tse Lee
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Patent number: 7598359Abstract: A bis(indolestyryl) compound. The 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, C1-5 alkyl, nitro, ester, carboxyl, sulfo, sulfonamide, amide, sulfo ester, C1-3 alkoxy, amino, alkylamino, 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, R4 is H, C1-5 alkyl, hydroxyl, halogen, or alkoxy, R5 and R5? comprise H, halogen, C1-5 alkyl, nitro, C1-3 alkoxy, amino, cyano, C1-6 alkylsulfonyl, or C2-7 alkoxy carbonyl, W comprises oxygen, sulfur, selenium, —NR, or —C(CH3)2, n is 1˜18 and Z1 and Z2 are different and comprise an anion or an anionic organometallic complex with +1 or +2 valence, wherein R bonded to nitrogen is C1-4 alkyl.Type: GrantFiled: September 1, 2005Date of Patent: October 6, 2009Assignee: Industrial Technology Research InstituteInventors: Shin-Shin Wang, Jong-Lieh Yang, Chii-Chang Lai, Hui-Ping Tsai, Wen-Ping Chu, Chien-Wen Chen, Chien-Liang Huang, Wen-Yih Liao, Ming-Chia Lee
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Patent number: 7553604Abstract: A cyanine compound represented by formula (I): wherein ring A and ring B each represent a substituted or unsubstituted benzene ring or a substituted or unsubstituted naphthalene ring; R1, R2, R3, and R4 each represent an alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted benzyl group, or R1 and R2 are taken together, or R3 and R4 are taken together, to form a 3- to 6-membered ring, provided that at least one of R1, R2, R3, and R4 is a substituted benzyl group; Y1 and Y2 each represent an organic group having 1 to 30 carbon atoms; Anm? represents an m-valent anion; m represents an integer 1 or 2; and p represents a coefficient for maintaining overall charge neutrality.Type: GrantFiled: July 27, 2004Date of Patent: June 30, 2009Assignee: Adeka CorporationInventors: Toru Yano, Koichi Shigeno, Mitsuhiro Okada
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Patent number: 7531667Abstract: To provide a two-photon absorption dye-containing material having a great off-resonant two-photon absorption cross section and comprising a two-photon absorption dye capable of decoloring itself through off-resonant two-photon absorption, useful for a three-dimensional refractive index or absorption index modulation material, a three-dimensional optical recording medium, three-dimensional refractive index modulation method and recording and reproducing method for a three-dimensional optical recording medium a two-photon absorption dye-containing material comprising at least a two-photon absorption dye capable of decoloring itself through two-photon absorption.Type: GrantFiled: July 16, 2004Date of Patent: May 12, 2009Assignee: FUJIFILM CorporationInventor: Hiroo Takizawa
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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
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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
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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
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Patent number: 7381517Abstract: A curable composition comprising: (A) an infrared absorber which is a cyanine dye having a structure in which hetero rings are bonded to each other via a methine chain and which has at least one substituent having a structure selected from the group consisting of an amide bond, a urethane bond, a urea bond and a sulfonamide bond on at least one of aromatic rings at both ends, nitrogen atoms present on the hetero rings at both ends and the methine chain; (B) at least one of a radical generator and an acid generator; and (C) at least one of a radical polymerizable compound and an acid crosslinking agent.Type: GrantFiled: March 10, 2005Date of Patent: June 3, 2008Assignee: FUJIFILM CorporationInventor: Kazuhiro Fujimaki
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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
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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
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Patent number: 7122290Abstract: Holographic storage mediums, methods for producing the storage medium, methods for storing data in the holographic storage medium, and optical storage reading methods are described herein. The holographic storage medium can be formed from a composition comprising a thermally crosslinked polysiloxane binder; a photoactive material; and a photo-initiator, wherein the photoactive material has a concentration that remains about the same before and after a thermal cure process to form the thermally crosslinked polysiloxane binder.Type: GrantFiled: June 15, 2004Date of Patent: October 17, 2006Assignee: General Electric CompanyInventors: Michael Jeffrey McLaughlin, Marc Dubois, James Edward Pickett, Peifang Tian
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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
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Patent number: 7094517Abstract: High sensitive organic dye-in-polymer (DIP) medium for write-once-read-many (WORM) optical discs with fluorescent reading. The medium consists of a fluorescent color means, capable of absorbing writing radiation produced by a laser, a compound capable of generating free radicals upon influence of heat produced by the writing radiation and a polymer capable of producing a translucent film enabling high quantum yield of the fluorescence induced in the color means. The color means can be selected from xanthene dyes of the eosine and rhodamine groups, acridine, oxazine, azine, peylene, violanthrone, cyanine, phtalocyanine, indigoide colors and porphyries. The free radicals generating compound can be chosen from the group of compounds comprising azo and diazoi compounds or peroxyde compounds. The film producing polymer can be selected from the group of compounds comprising cellulose ethers, vinyl resins or acrylic resins.Type: GrantFiled: May 13, 1999Date of Patent: August 22, 2006Assignee: D Data Inc.Inventors: Mark Alperovich, Eugene Levich, Irene Zuhl, Svetlana Makievskaya
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Patent number: 7078149Abstract: A method for fabricating an optical recording medium is provided. A dye layer is formed on a molded substrate by spin-coating. A reflection layer is formed on the dye layer by sputtering so that the optical disc has enough reflection rate. The dye layer comprises a cyanine type dye and an azo metal chelate compound selected from the formula (I): wherein M is a metal ion; R1 is a hydrogen atom, a linear or branched alkyl group containing 1 to 6 carbon atoms, amino group, alkyl amino group or toluidinyl group; R2 is a hydrogen atom, a hydroxyl group, a halogen atom, an ether group, an ester group or a linear or branched alkyl group containing 1 to 6 carbon atoms; R3 is a hydrogen atom or a linear or branched alkyl group containing 1 to 6 carbon atoms; R4 is a hydrogen atom, a halogen atom or a linear or branched alkyl group containing 1 to 6 carbon atoms; A1 is a heterocyclic derivative group constituted by carbon atoms and nitrogen atoms.Type: GrantFiled: October 3, 2002Date of Patent: July 18, 2006Assignee: Ritek CorporationInventors: Wen-Dar Liu, Nae-Jen Wang, Wan-Chun Chen, Biing-Hwang Lin, Hui-Jen Chen, Hsin-Te Kuo
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Patent number: 7041354Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on or read by means of blue, red or infrared light, preferably laser light, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one cyanine dye is used as light-absorbent compound.Type: GrantFiled: September 29, 2004Date of Patent: May 9, 2006Assignee: Bayer AktiengesellschaftInventors: Horst Berneth, Friedrich-Karl Bruder, Wilfried Haese, Rainer Hagen, Karin Hassenrück, Serguei Kostromine, Peter Landenberger, Rafael Oser, Thomas Sommermann, Josef-Walter Stawitz, Thomas Bieringer
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Patent number: 7022393Abstract: An optical recording medium can be recorded at a high linear velocity of at least 10 m/s while maintaining an excellent light stability and favorable reflectance. A recording medium is constructed of a recording layer on a substrate, the recording layer including a first dye with a maximum absorption wavelength in a thin-film state of 450 nm to 620 nm inclusive as a first dye and being formed so as to include a second dye with an extinction coefficient of at least 0.5 for a recording wavelength. In this case, it is preferable for the second dye to have a maximum absorption wavelength of 620 nm to 750 nm inclusive in a thin-film state.Type: GrantFiled: December 20, 2004Date of Patent: April 4, 2006Assignee: TDK CorporationInventors: Takashi Horai, Hiroyuki Arioka, Narutoshi Fukuzawa, Syuji Tsukamoto
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Patent number: 7008753Abstract: The present invention provides an optical recording medium including a recording layer and an optical reflection layer formed on a substrate. The recording layer contains at least one particular polymethine pigment selected from polymethine pigments having 1 to 4 carbons in the methine main chain, so as to obtain a sufficient recording sensitivity for a red wavelength range of light.Type: GrantFiled: March 4, 2004Date of Patent: March 7, 2006Assignee: Sony CorporationInventors: Shinichiro Tamura, Mitsuaki Oyamada
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Patent number: 6824953Abstract: Disclosed are a photopolymerizable composition and a recording material containing the composition. The composition comprises a polymerizable compound having an ethylenic unsaturated bond, a compound of the following general formula (1), and a radical generator that interacts with the compound of formula (1) to generate a radical.Type: GrantFiled: February 1, 2002Date of Patent: November 30, 2004Assignee: Fuji Photo Film Co., Ltd.Inventors: Masanobu Takashima, Yuuichi Fukushige
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Publication number: 20040214107Abstract: The present invention provides an optical recording medium including a recording layer 2 and an optical reflection layer 3 formed on a substrate 1. The recording layer 2 contains at least one particular polymethine pigment selected from polymethine pigments having 1 to 4 carbons in the methine main chain, so as to obtain a sufficient recording sensitivity for a red wavelength range of light.Type: ApplicationFiled: March 4, 2004Publication date: October 28, 2004Inventors: Shinichiro Tamura, Mitsuaki Oyamada
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Publication number: 20040197705Abstract: A cyanine compound of formula (I), an optical filter containing the cyanine compound, and an optical recording material containing the cyanine compound which is used to form an optical recording layer of an optical recording medium: 1Type: ApplicationFiled: March 30, 2004Publication date: October 7, 2004Applicant: ASAHI DENKA CO., LTD.Inventors: Masaaki Shimizu, Koichi Shigeno, Toru Yano
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Publication number: 20040161701Abstract: Disclosed are novel trimethine cyanine dyes, light absorbents, light-resistant improvers, and optical recording media which comprise the trimethine cyanine dyes. The cyanine dyes exert satisfactory solubility and heat resistance when used in high-density optical recording media.Type: ApplicationFiled: February 5, 2004Publication date: August 19, 2004Applicant: KABUSHIKI KAISHA HAYASHIBARA SEIBUTSU KAGAKU KENYUJOInventors: Ayako Hohsaka, Dai Matsuura, Toshio Kawata, Shigeo Yasui
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Publication number: 20040157152Abstract: A lithographic printing plate precursor capable of forming an image upon irradiation with an infrared laser comprising a support, a first layer containing as the main component an alkali-soluble resin and a second layer containing as the main component an alkali-soluble resin that is different from the alkali-soluble resin contained as the main component in the first layer in this order, and at least one of the first layer and the second layer contains a mixture comprising at least two kinds of infrared absorbing agents.Type: ApplicationFiled: January 12, 2004Publication date: August 12, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventor: Ippei Nakamura
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Patent number: 6770347Abstract: A cyanine dye compound represented by formula (I) shown below, and an optical recording medium having a recording layer which is capable of recording information by laser irradiation and contains the cyanine dye compound. In formula (I), Xp− represents a p-valent anionic tetracyanoquinodimethane compound represented by formula (II): The other symbols in the formulas are defined in the specification.Type: GrantFiled: July 3, 2002Date of Patent: August 3, 2004Assignee: Fuji Photo Film Co., Ltd.Inventor: Shinnichi Morishima
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Publication number: 20040142278Abstract: An optical recording medium dye is disclosed.Type: ApplicationFiled: January 9, 2004Publication date: July 22, 2004Inventors: Chao-Nan Kuo, Mei-Jung Hu
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Patent number: 6737142Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on and read by means of infrared light, preferably laser light, particularly preferably light having a wavelength in the range 750-800 nm, in particular 770-790 nm, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one cobalt(III) phthalocyanine in which the Co metal centre bears two axial substituents R1 and R2 which represent, independently of one another, CN, SCN, alkoxy or alkylthio is used as light-absorbent compound.Type: GrantFiled: March 20, 2002Date of Patent: May 18, 2004Assignee: Bayer AktiengesellschaftInventors: Horst Berneth, Friedrich-Karl Bruder, Wilfried Haese, Rainer Hagen, Karin Hassenrück, Serguei Kostromine, Peter Landenberger, Rafael Oser, Thomas Sommermann, Josef-Walter Stawitz, Thomas Bieringer
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Publication number: 20040086803Abstract: 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: ApplicationFiled: October 6, 2003Publication date: May 6, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Hiroo Takizawa, Takeharu Tani, Naoki Morinaga
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Patent number: 6727041Abstract: Optical recording media comprising a base (1), a recording layer (2) formed thereon, and a reflecting layer (3) formed on the layer (2), wherein the recording layer (2) contains at least one kind of specified dyes selected from among polymethine dyes having 1 to 4 carbon atoms in the main methine chain to secure a sufficient recording sensitivity to a light in the red wavelength region.Type: GrantFiled: February 7, 2000Date of Patent: April 27, 2004Assignee: Sony CorporationInventors: Shinichiro Tamura, Mitsuaki Oyamada
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Patent number: 6716506Abstract: A recordable optical recording medium, particularly a recordable high-density optical recording medium is disclosed. The optical recording medium comprises a substrate and a recording layer formed on said substrate, wherein said recording layer contains at least one laser beam absorbing dyes of formula (I): wherein Q is phenyl or naphthyl substituted by C1-4alkoxy; R1 and R2, independently of each other, are C1-8alkyl; Y is hydrogen or C1-4alkoxy; and X− is an anion.Type: GrantFiled: November 28, 2001Date of Patent: April 6, 2004Assignee: Gigastorage CorporationInventor: Guang Fu Yan
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Patent number: 6716509Abstract: An optical recording medium provided on a substrate with a recording layer, said recording layer comprising at least one kind of the trimethine-cyanine dye and an additive, wherein said the additive of recording layer selectively comprises the dye selected from the group consisting of the chemical compounds represented by the following general formula [10], [11], [12], and [13]: “EDG” represents any electron-withdrawing substituted group such as alkylamino or anino group.Type: GrantFiled: August 20, 2002Date of Patent: April 6, 2004Assignee: CMC Magnetics CorporationInventors: Sue-Min Yeh, Kao-Ming Chang, Wen-Pin Chiu, Chiung-Man Huang, Lii-Chyuan Tsai
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Patent number: 6713146Abstract: The present invention relates to a singly recordable optical data medium using Co-phthalocyanine complexes of the formula (I) in which the groups are defined herein, as light-absorbing compounds in the information layer of optical data media, in which information layer is recordable using light, particularly for CD-R, and the application of the above-mentioned compounds to a polymer substrate, particularly polycarbonate, by spin coating.Type: GrantFiled: September 20, 2001Date of Patent: March 30, 2004Assignee: Bayer AktiengesellschaftInventors: Josef-Walter Stawitz, Horst Berneth, Thomas Bieringer, Friedrich-Karl Bruder, Rainer Hagen, Karin Hassenrück, Serguei Kostromine, Rafael Oser
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Patent number: 6699591Abstract: The present invention provides an optical information recording medium comprising a substrate including a groove that has a track pitch of 200 to 400 nm and a depth of 20 to 150 nm, the substrate having successively disposed thereon a light-reflective layer, a recording layer containing a dye and on which information is recordable by a laser beam having a wavelength of 600 nm or less, and a cover layer, wherein the recording layer contains at least two organic solvent-soluble compounds each having an absorption maximum in the range of 300 to 450 nm and a specific absorbance at a recording laser wavelength.Type: GrantFiled: June 3, 2002Date of Patent: March 2, 2004Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshio Ishida, Takeshi Kakuta
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Patent number: 6667087Abstract: An optical information recording medium with a recording layer enables a recording and reproducing to be effected with a 650 nm (or further) laser beam, and the recording layer contains at least one kind of the trimethine-cyanine dye which is a compound represented by the following general formula [1], [2], [3], [4]. The “EWG” represents any electron-withdrawing substituted group such as cyano or nitro group.Type: GrantFiled: November 30, 2001Date of Patent: December 23, 2003Assignee: CMC Magnetics CorporationInventors: Sue-Min Yeh, Kao-Ming Chang, Wen-Pin Chiu, Lii-Chyuan Tsai
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Publication number: 20030224293Abstract: An optical recording medium comprising a substrate having formed thereon a thin film comprising an organic compound dye that can form pits when irradiated with a semiconductor laser beam and a compound represented by formula (I) as a recording layer: 1Type: ApplicationFiled: February 19, 2003Publication date: December 4, 2003Applicant: ASAHI DENKA KOGYO KABUSHIKI KAISHAInventors: Keiji Oya, Atsurou Tomita, Toru Yano