Adhesive Containing Patents (Class 428/65.2)
  • Patent number: 9123379
    Abstract: A disk (100) having a center hole (100a), the disk (100) being provided with a support-capable structure for making it possible to support a disk (100A) positioned one level above the lowermost part in a stacked state using separation claws (164Ac, 164Bc) protruding radially outward from the center hole (100a).
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: September 1, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hitoshi Higaki, Norikatsu Yoshida, Tatsuro Nishi, Yuji Ariyoshi, Takuto Yamazaki
  • Publication number: 20140127534
    Abstract: An optical or magnetic storage medium is disclosed that includes a disc having layers of graphene on one or both sides of the disc to provide wear protection against scratches and mechanical abrasion.
    Type: Application
    Filed: January 12, 2014
    Publication date: May 8, 2014
    Inventor: TYSON YORK WINARSKI
  • Publication number: 20140050877
    Abstract: There is provided an optical information recording medium including a plurality of laminated resin layers, and an inorganic layer that is formed in an interface between the resin layers. Storage elastic moduli are different when the interface is assumed to be a boundary. An information signal is recorded in the interface.
    Type: Application
    Filed: August 5, 2013
    Publication date: February 20, 2014
    Applicant: Sony Corporation
    Inventors: Yo Ota, Shiori Tashiro, Koichi Yasuda, Hiroshi Uchiyama, Shinya Narumi, Kenji Takayanagi, Mitsuaki Oyamada, Tetsuhiro Sakamoto
  • Publication number: 20130323439
    Abstract: An optical effect disc, has a transparent substrate and a surface optical structure, and an optical recording media combining the optical effect disc. The surface optical structure may be a computer-generated hologram optical structure or a micro-lens array structure for showing the effect of brightening or peep prevention, or a diffraction gating structure for achieving a three-dimensional visual effect. The optical effect disc or the optical recording media may include an image forming layer for forming an image to be shown by the optical effect disc with corresponding visual effect. The optical effect disc or the optical recording media may include an adhesive layer for attaching the optical effect disc to the optical recording media.
    Type: Application
    Filed: August 9, 2012
    Publication date: December 5, 2013
    Applicant: CMC MAGNETICS CORPORATION
    Inventors: Yung-Hui Hung, Cheng-Pi Lee, Min-Hao Pan, Yao-Kai Kuo
  • Publication number: 20130302553
    Abstract: An optical storage medium is disclosed that includes an optical disc having layers of graphene on one or both sides of the disc to provide wear protection against scratches and mechanical abrasion. Grahpene is a hard material that is 97.7% optically transparent. Thus, layers of graphene at or near the exterior sides of an optical disc provide wear protection to the optical media from mechanical abrasion and scratches while allowing laser light to pass through the graphene layers to read or write to the optical media.
    Type: Application
    Filed: May 5, 2013
    Publication date: November 14, 2013
    Inventor: Tyson York WINARSKI
  • Patent number: 8168690
    Abstract: A solvent-free photocurable resin composition is provided which can be applied to the surface of optical discs or the like to form a highly transparent protective film that can stably adhere to the surface and effectively protect the surface from scratches. The solvent-free photocurable resin composition contains a urethane(meth)acrylate oligomer, a trifunctional (meth)acrylic acid ester monomer, a photopolymerization initiator, and a dilution monomer. The dilution monomer contains a fluorine-based (meth)acrylic acid ester monomer having three or more fluorine atoms and a monofunctional or difunctional (meth)acrylic acid ester monomer in amounts of from 10 to 40 wt% and from 10 to 30 wt%, respectively.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: May 1, 2012
    Assignees: Sony Chemical & Information Device Corp., Sony Corp., Sony Disc & Digital Solutions Inc.
    Inventors: Kiichiro Oguni, Kozaburo Hayashi, Satoshi Yanagida, Hidetoshi Watanabe, Naoki Okawa
  • Publication number: 20110262675
    Abstract: The present invention provides a photo-curable transfer sheet by which an optical information recording medium having small thickness and high capacity can be advantageously prepared, the photo-curable transfer layer of the sheet cured in the production of the optical information recording medium having excellent adhesion to the reflective layer such silver alloy and easy peeling property from the stamper to easily bring about the transfer layer having an uneven surface such as pits, etc accurately formed along an uneven surface of the stamper. The photo-curable transfer sheet has a photo-curable transfer layer comprising a photo-curable composition deformable by application of pressure, wherein the photo-curable composition comprises a polymer and a reactive diluent having a photopolymerizable functional group, and the reactive diluent has at least one hydroxyl group and an acryloyl group and/or methacryloyl group, the total of acryloyl group and/or methacryloyl group being at least two.
    Type: Application
    Filed: August 31, 2006
    Publication date: October 27, 2011
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Takato Inamiya, Hideki Kitano, Hidefumi Kotsubo, Kenji Murayama
  • Publication number: 20110239240
    Abstract: A sticker media disk may be easily stuck on an old CD, DVD, or other optical disk as a base. The combination then becomes a media disk completely playable with content in audio players, computers drives, DVD, and/or high definition (HD) disk players.
    Type: Application
    Filed: June 10, 2011
    Publication date: September 29, 2011
    Applicant: Gibby Media Group
    Inventor: Lon Gibby
  • Patent number: 8012560
    Abstract: An optical disc (10) includes a substrate (11), which is formed from either a resin-impregnated paper produced by impregnating a paper with a resin, or a resin-coated paper produced by coating a surface of a paper with a resin, and a recording layer (13), wherein the resin contains at least one resin selected from the group consisting of polycarbonates, bisphenol A epoxy resins, copolymers of methyl methacrylate and styrene, and copolymers of acrylonitrile and styrene. Furthermore, a method of manufacturing an optical disc (20) includes: providing a recording layer sheet by forming tracks on a recording base material; and bonding the recording layer sheet to a resin-impregnated paper or a resin-coated paper, thereby providing a recording layer (13) formed from the recording layer sheet on the substrate (11).
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: September 6, 2011
    Assignees: Toppan Printing Co., Ltd., Sony Corporation
    Inventors: Toshiro Kinoshita, Masayuki Taniguchi, Hiroshi Umeyama, Takeshi Yamasaki, Tomomi Yukumoto
  • Publication number: 20110200780
    Abstract: Provided is a manufacturing method of an optical information storage medium irradiated with laser beams to optically record or reproduce information. A method of manufacturing an optical information storage medium according to the present invention includes forming asperity patterns for guiding laser beams on both sides of a second substrate 12, forming information recording layers 41 and 42 in the asperity patterns, bonding a first substrate 11 to a surface where one information storage layer 41 is formed in the second substrate 12 with an ultraviolet curable resin 22 formed therebetween, and bonding a third substrate 13 to a surface where another information storage layer 42 is formed in the second substrate 12 with an ultraviolet curable resin 22 formed therebetween.
    Type: Application
    Filed: August 18, 2009
    Publication date: August 18, 2011
    Applicant: NEC CORPORATION
    Inventor: Eiji Kariyada
  • Publication number: 20110189424
    Abstract: An optical disc is described that bears, on one surface, a plurality of color-forming layers that can form a multicolored image when heated in contact with a thermal print head. The color-forming composition comprises color-forming layers and thermally-insulating spacers and is designed such that warping of the optical disc in conditions of changing temperature and humidity is minimized. The compliance of the color-forming composition is such that intimate contact between the thermal print head and the printable surface of the disc can be maintained as one is translated relative to the other. Methods for assembling such an optical disc are provided.
    Type: Application
    Filed: February 3, 2011
    Publication date: August 4, 2011
    Inventors: Yulin HARDIN, Stephen Robert Herchen, Dana Frederic Schuh, William T. Vetterling, Michael Armour Young, Stephen J. Telfer, Chien Liu
  • Publication number: 20110143076
    Abstract: A sheet (1) for manufacturing an optical disc which includes a pressure-sensitive adhesive layer (11), having a peak temperature of a loss tangent not higher than ?10° C. and a polar component (?Ps) of the surface energy not smaller than 2.0 mJ/m2, and a protective sheet (12), is laminated on a data recording layer (3) (a laminate formed of a reflecting layer (31), a dielectric layer (32), a phase change layer (33) and a dielectric layer (32?)) that is formed on an optical disc substrate (2). The sheet for manufacturing an optical disk (1) allows obtaining an optical recording medium that is provided with the pressure-sensitive adhesive layer (11) that has high adhesion to the data recording layer (3) and does not peel readily off adjacent layers.
    Type: Application
    Filed: June 25, 2009
    Publication date: June 16, 2011
    Applicant: Lintec Corporation
    Inventors: Naoki Taya, Masaharu Ito, Takashi Morioka
  • Patent number: 7935213
    Abstract: A non-leaching adhesive system and its use in a liquid immersion objective for immersion-writing of masters for optical discs are disclosed. The adhesive system comprises at least one monomer, selected from among the group of acrylate and methacrylate monomers, allylic monomers, norbornene monomers, hybrid monomers thereof, containing chemically different polymerizable groups, and multifunctional thiol monomers, provided that said thiol is used in combination with at least one of said non-thiol monomers; and a polymerization initiator. At least one of said monomers, not being a thiol, is provided with at least two functional polymerizable groups to obtain a crosslinked polymer network. The polymerization initiator is preferably an initiator that can be activated both thermally and with UV radiation. The adhesive system may further contain a reactive diluent. Further the use of the present adhesive system in mounting a liquid immersion objective is disclosed.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: May 3, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Emile Johannes Karel Verstegen, Johan George Kloosterboer, Hendrik Roelof Stapert, Jacobus Hermanus Maria Neijzen, Helmar van Santen
  • Patent number: 7923090
    Abstract: A transparent protective layer (106) having a thickness of 100 ?m is formed of a resin film (100), a boundary layer (104) and an adhesive layer (103) on a signal recording layer (102). When nf, ni and na are the indices of refraction of the resin film (100), the boundary layer (104) and the adhesive layer (103), respectively, the relationship among nf, ni, and na satisfies any one of the following equation: na<ni?nf; na>ni?nf; na<nf?ni; or na>nf?ni, and the relationship among nf, ni, and na satisfies the following equation |nf?ni|<|nf?na|. At this time, a protrusion (111) and a scratch (110) are optically buried within the boundary layer (104), reducing scattering of laser beams and disturbance in the wave front which occur in these portions, and thereby, the error rate can be reduced.
    Type: Grant
    Filed: April 6, 2005
    Date of Patent: April 12, 2011
    Assignee: Panasonic Corporation
    Inventors: Kazuhiro Hayashi, Keiji Nishikiori, Sou Miyata
  • Patent number: 7846984
    Abstract: If an ultraviolet curing resin is colored by contamination by another substance, there have been issues regarding increased cost and the environmental burden of treating the waste solution due to an inability to recycle the resin as it is. The ultraviolet curing resin that is in a colored, uncured state is decolored in the present invention by irradiation of light having a wavelength in the vicinity of the maximum absorption wavelength of the coloring material, and then recycled. As a result, it is possible to reduce costs and contribute to the protection of the environment.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: December 7, 2010
    Assignee: Panasonic Corporation
    Inventors: Yukako Doi, Toshiyuki Aoyama
  • Patent number: 7799404
    Abstract: A photo-curable transfer sheet having a photo-curable layer comprising a photo-curable composition, the photo-curable composition being deformable by application of pressure and containing a reactive polymer having a photopolymerizable functional group. The photo-curable transfer sheet preferably has a light transmittance of not less than 70% in a wavelength rang of 380 to 420 nm. An optical information recording substrate and medium prepared by the sheet. The sheet easily and precisely enables transfer of unevenness of the surface of a stamper by pressing.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: September 21, 2010
    Assignee: Bridgestone Corporation
    Inventors: Hideki Kitano, Hidefumi Kotsubo, Takato Inamiya
  • Patent number: 7767284
    Abstract: The object of the present invention is to provide an optical recording medium which comprises a substrate, and a first information layer and a second information layer disposed on the substrate, and an intermediate layer disposed between the first information layer and the second information layer, wherein any one of recording and reproducing is performed in the first information layer and the second information layer by irradiating a laser beam from the first information layer side, the second information layer comprises a protective layer, a second dye layer which comprises an organic dye, an oxidized layer, and a reflective layer in this order from the laser beam irradiation side, and the oxidized layer comprises an oxide which is a material constituting the reflective layer.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: August 3, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Michiaki Shinotsuka, Masaru Shinkai, Hiroyuki Iwasa, Tatsuo Mikami, Yuki Nakamura, Tohru Yashiro
  • Patent number: 7758940
    Abstract: The present invention provides an optical disk producing sheet 1, obtained by laminating a stamper-receiving layer 11 that is energy rays-curable and whose storage elastic modulus prior to curing is from 103 to 107 Pa, and an adhesive layer 12 whose adhesive strength to polycarbonate is at least 200 mN/25 mm, and whose storage elastic modulus during the curing of the stamper-receiving layer 11 is from 103 to 107 Pa. With the optical disk producing sheet 1, separation that occurs during the production of an optical disk, or during the storage of the finished product, is prevented, and warpage in the resulting optical disk is reduced.
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: July 20, 2010
    Assignee: Lintec Corporation
    Inventors: Sou Miyata, Kazuya Katoh, Shin Kubota
  • Publication number: 20100143638
    Abstract: A sheet material for a multilayer optical recording medium (10-a) which comprises an optical recording layer comprising a multiple-photon absorbing material (1), an adhesive layer (4) and a transfer layer of the energy beam curable type (3). The transfer layer of the energy beam curable type (3) is a layer for transferring the shape of a stamper having a shape having protrusions and depressions on the surface as recording pits and/or grooves. The transfer layer of the energy beam curable type (3) and the adhesive layer (4) are each disposed as outermost layers. A multilayer optical recording medium which has a repetitive structure comprising a plurality of laminated optical recording layers and exhibits excellent accuracy of thickness of each layer and the whole laminate can be produced with excellent productivity. Positional information can be contained at the inside of the optical recording medium.
    Type: Application
    Filed: July 4, 2008
    Publication date: June 10, 2010
    Applicant: LINTEC CORPORATION
    Inventor: Masahito Nakabayashi
  • Publication number: 20090291248
    Abstract: A coating composition containing a solvent and a coating agent having an ionizing radiation-curable compound as a principal component thereof, wherein under the following condition for the concentration a (wt %) of the coating agent in the coating composition 0<a?60, the concentration a of the coating agent and the surface tension b (dyne/cm) of the coating composition satisfy the following relationship b?(?a/15)+26, is applied onto a surface of a protective film 11 and curing is carried out to form a hard coating layer 12. Even in the case that projections or foreign bodies are present on the surface of the protective film 11, the hard coating layer 12 can conceal these and hence can have high surface smoothness.
    Type: Application
    Filed: July 30, 2009
    Publication date: November 26, 2009
    Applicants: LINTEC CORPORATION, SONY CORPORATION
    Inventors: Yuki Hongo, Satoru Shoshi, Hideo Senoo, Takeshi Yamasaki, Tomomi Yukumoto
  • Publication number: 20090226659
    Abstract: A read-once record medium includes a data substrate having a control data zone and a data zone with pre-record data. In addition, a sensitive layer is disposed above the data substrate and a refractive layer is disposed above the sensitive layer. An adhesive layer is disposed above the refractive layer and a transparent substrate is disposed above the adhesive layer. As a result, the structure of the sensitive layer or the data substrate will be destroyed when laser beams with a specified power a emitted from an optical storage device pass through the data substrate and focus on the sensitive layer. The laser beams will be reflected by the sensitive layer and cannot be recognized by the optical storage device.
    Type: Application
    Filed: May 20, 2009
    Publication date: September 10, 2009
    Inventor: Wellen Sham
  • Publication number: 20090109833
    Abstract: A printable optical disc including an optical disc body, a waterproof protective film, and a first patterned layer is provided. The optical disc body has a printable surface. The waterproof protective film has an upper surface and a lower surface. The lower surface is disposed on the printable surface, and the upper surface has an optical grating pattern or a pixel pattern. The first patterned layer is disposed between the lower surface of the waterproof protective film and the printable surface.
    Type: Application
    Filed: September 4, 2008
    Publication date: April 30, 2009
    Applicant: DAXON TECHNOLOGY INC.
    Inventor: Chen Peng
  • Publication number: 20090075016
    Abstract: Disclosed herein is a method for producing a multilayer information recording medium having at least two information recording layers, in which a resin layer is formed between each pair of the information recording layers, the method including: holding a substrate; feeding a resin onto the substrate; and removing the excess resin by moving a squeegee throughout the entire surface of the substrate so that the interval between the bottom surface of the squeegee and the surface of the substrate is kept constant. The substrate may have a resin-coated region, onto which the resin is to be applied, and a non-resin-coated region, onto which the resin is not to be applied. In this case, the resin-coated region has a smaller contact angle with the resin than the non-resin-coated region.
    Type: Application
    Filed: May 15, 2006
    Publication date: March 19, 2009
    Inventors: Yuuko Tomekawa, Morio Tomiyama, Keiji Nishikiori, Masahiko Tsukuda
  • Patent number: 7498070
    Abstract: For improving the humidity resistance reliability and the jitter property of an optical disk, the adhesive layer used for bonding a bonding type optical information recording medium is defined such that the glass transition temperature is 100° C. or higher at 200° C. or lower, the modulus of elasticity at 25 to 80° C. is 1000 MPa or more, the adhesion strength thereof is 4 N or more, the reflective layer is defined such that the hardness is 60 mgf/?m2 or more as the nano indentation hardness, and the dye recording layer is defined such that the water solubility of the dye as light absorption is 0.2 or less.
    Type: Grant
    Filed: September 13, 2005
    Date of Patent: March 3, 2009
    Assignee: Taiyo Yuden Co., Ltd
    Inventors: Sachiko Ishibashi, Fumi Hara, Toru Fujii, Yuji Arai
  • Publication number: 20090029093
    Abstract: An optical information recording medium includes, in order, a first substrate; a recording layer capable of recording and reproducing information by irradiation with a first laser; a reflective layer; at least two visible information recording layers capable of recording visible information by irradiation with a second laser; and a second substrate, wherein said two visible information recording layers are not fused or mixed with each other by irradiation with said second laser light.
    Type: Application
    Filed: May 9, 2008
    Publication date: January 29, 2009
    Applicant: FUJIFILM CORPORATION
    Inventor: Takashi Imai
  • Patent number: 7452595
    Abstract: A heat-sensitive adhesive material contains a substrate and a heat-sensitive adhesive layer that contains a thermoplastic resin and a solid plasticizer, and the heat-sensitive adhesive material is so configured as to be heated and applied to an adherend, wherein the heat-sensitive adhesive material exhibits such an adhesive strength to the adherend as to increase with time from immediately after applying the heat-sensitive adhesive material to the adherend.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: November 18, 2008
    Inventors: Mitsunobu Morita, Tomoyuki Kugo, Hiroshi Goto, Norihiko Inaba
  • Publication number: 20080274323
    Abstract: The recording medium comprises at least a first (L1) and a second (L2) micro-structured stage assembled by an adhesive layer (4) and arranged between micro-structured bottom (2) and top substrates. A polymerizable layer forming the adhesive layer (4) is deposited on the first stage (L1). Then a micro-structured transparent matrix (5) is provisionally placed on the adhesive layer (4) so as to micro-structure the adhesive layer (4). Polymerization of the adhesive (4) is performed by exposure, through the matrix (5), with a polymerization light. Then the matrix (5) is removed and the second stage (L2) is deposited on the micro-structured adhesive layer (4). Then an additional adhesive layer (9) is deposited on the second stage (L2) and the micro-structured matrix (5) is definitively placed on the additional adhesive layer (9) so as to form the top substrate.
    Type: Application
    Filed: May 17, 2005
    Publication date: November 6, 2008
    Applicants: COMMISSARIAT A L'ENERGIE ATOMIQUE, MPO INTERNATIONAL
    Inventors: Jacques Raby, Alain Fargeix, Marc Plissonnier, Marine Ruty
  • Publication number: 20080206508
    Abstract: The present invention relates to a method for producing a two- or multilayer optical storage medium, wherein a first half-substrate with a first information layer is produced and a first metal layer is applied to the surface of the first half-substrate containing the information structure. Furthermore, a second half-substrate with a second information structure is produced and a separation layer is applied onto the surface of the second half-substrate containing the information structure. The two half-substrates are glued together by means of an adhesive, wherein the metal layer of the first half-substrate and the separation layer of the second half-substrate face each other with an adhesive layer in-between. After curing of the adhesive, the separation layer of the second half-substrate is separated from the adhesive layer and a second metal layer is applied onto the adhesive layer.
    Type: Application
    Filed: February 13, 2008
    Publication date: August 28, 2008
    Inventor: Thomas Jakob
  • Publication number: 20080182060
    Abstract: In accordance with the invention a new optical data carrier and methods for its production are provided. The optical data carrier of the invention is characterized in that different plates have different concentrations.
    Type: Application
    Filed: January 12, 2006
    Publication date: July 31, 2008
    Inventors: David Livshits, Ortal Alpert, Yair Salomon
  • Publication number: 20080145588
    Abstract: A coating composition for optical recording includes a uniform dispersion of polymer particles in a liquid, a quantity of dye particles uniformly dispersed in the liquid, the dye particles being soluble in the polymer but substantially insoluble in the liquid, and a quantity of radiation absorber material adapted to absorb radiation at a wavelength of a laser for optical recording of an image.
    Type: Application
    Filed: December 16, 2006
    Publication date: June 19, 2008
    Inventors: Vladek P. Kasperchik, Michael J. Day, Jayprakash C. Bhatt
  • Patent number: 7112359
    Abstract: The present invention provides a method and apparatus for a multilayer optical articles. A method comprises forming a first multilayer article with a first substrate and a second substrate with a first adherent disposed between the first and second substrate. A first surface of a third substrate is then grasped with a first holder and a second adherent is then disposed on one or more surfaces selected from a second surface of the third substrate and a surface of the first multilayer article while the multilayer article is grasped by a second holder. The second adherent is then at least partially cured while the first and second holders maintain their grasp and while the inner surfaces of the first and second holders are in the selected angular relationship to form a second multilayer article.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: September 26, 2006
    Assignee: InPhase Technologies, Inc.
    Inventors: Lisa Dhar, Mark David Michaels
  • Patent number: 7078084
    Abstract: The present invention provides a process for producing an optical information recording medium transparent sheet, including applying a radiation-curable resin coating solution continuously to one surface of a cover film wound in a roll form, followed by continuously irradiating the coat formed in order to cure the coat and thereby form a hard coat layer, forming an adhesive layer continuously onto another surface of the cover film, and winding back into a roll form the cover film on which the hard coat layer and the adhesive layer have been formed; an optical information recording medium transparent sheet produced by this production process, and an optical information recording medium provided with this optical information recording medium transparent sheet.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: July 18, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Takeshi Kakuta
  • Patent number: 7052756
    Abstract: The present invention provides an adhesive that can provide an excellent durability (reliability) to a bonded optical disk having a translucent reflection film comprising silicone, silver or a silver alloy. The adhesive of the present invention contains a (meth)acrylate monomer (A) having a solution resistance of 1.0×1010 ?·cm or more.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: May 30, 2006
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Kiyohisa Tokuda, Kazuhiko Ishii, Go Mizutani
  • Patent number: 7011877
    Abstract: A method of improving the ability of plastic layers of a multi-layered optical disc to bond to adhesive materials includes exposing the plastic layers to a plurality of ions. In one embodiment, one side of a plastic layer of a multi-layered optical disc is exposed to a plurality of non-reactive ions, an adhesive material is applied to the side of the plastic layer that was exposed to the plurality of ions, and a second layer of the optical disc is secured to the adhesive material. In another embodiment, a plurality of ions is formed by directing gas molecules through an electric field, and at least 25% of the width of the plastic layer of the multi-layered optical disc is exposed to the plurality of ions at about the same time. The plastic layer is positioned so that the ions contact the plastic layer while the ions still have a charge, and the disc is moved so that at least 25% of the surface of the plastic layer is exposed to the plurality of ions.
    Type: Grant
    Filed: October 19, 2004
    Date of Patent: March 14, 2006
    Assignee: National Film Laboratories, Inc.
    Inventors: Barry Alexander Singer, Robert I. Freedman
  • Patent number: 7005174
    Abstract: An optical disc-producing sheet 1, which has an adhesive layer 11 having a specific heat capacity after curing of not more than 1.9 J/g·° C. at 80° C. and a protective sheet 12, is laminated onto an information recording layer 3 (a laminate of a reflecting layer 31, a dielectric layer 32, a phase change layer 33 and a dielectric layer 32?) formed on an optical recording medium substrate 2. According to this optical disc, recorded information can be reproduced accurately even in the case that recording/erasure or reproduction of information has been carried out repeatedly.
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: February 28, 2006
    Assignees: LINTEC Corporation, SONY Corporation
    Inventors: Takeshi Yamasaki, Tomomi Yukumoto, Sou Miyata, Kazuya Katoh, Shin Kubota
  • Patent number: 6994900
    Abstract: To improve a bad appearance due to an interconnection between a pair of disk substrates (20, 30) which are bonded with annular grooves (25, 35) being opposed to each other by a simple structure and at a low cost, which have annular grooves (25, 35) near their center openings (15), an outer groove end (26) of the annular groove (25) of one disk substrate (20) in the radial direction is registered in position with an outer end (36) of the annular groove (35) of the other disk substrate (30) and inner groove ends (27, 37) of the annular grooves in the radial direction are located in different positions. The annular grooves have different groove widths A, B.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: February 7, 2006
    Assignee: Kabushiki Kaisha Meiki Seisakusho
    Inventor: Toshiyuki Ebina
  • Patent number: 6972143
    Abstract: The invention relates to a protective U.V. curable or photoimageable cover layer for an optical disk substrate and a method of applying the protective cover layer to an optical substrate. The U.V. curable or photoimageable layer is applied as a dry film and has high clarity and cures to a flexible, scratch resistant, non-shrinking film, which has good adhesion to the underlying substrate.
    Type: Grant
    Filed: October 27, 2003
    Date of Patent: December 6, 2005
    Inventor: Kyle Baldwin
  • Patent number: 6887548
    Abstract: An optical information recording medium includes a substrate having a thickness of approximately 1.0 mm to 1.2 mm, with a spiral pre-groove being formed at a predetermined area on the substrate excluding a central hole and an outer periphery. Successively disposed on the area at which the pre-groove is formed are a light-reflective layer, a recording layer that can record information when irradiated with light having a wavelength range of 380 nm to 500 nm, a protective layer for protecting the recording layer, an adhesive layer made of a photocurable resin that has been cured by being irradiated with visible light, and a thin transparent protective layer.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: May 3, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Michihiro Shibata
  • Patent number: 6884315
    Abstract: A method for bonding DVD layers which comprises EB bonding at least two layers of a DVD with an EB curable adhesive composition which consists essentially of at least one epoxy resin and at least one aryl iodonium salt (cationic) photoinitiator and DVDs produced by this method.
    Type: Grant
    Filed: August 20, 2002
    Date of Patent: April 26, 2005
    Assignee: UCB, S.A.
    Inventors: Morris A. Johnson, Michael J. Idacavage
  • Patent number: 6855389
    Abstract: The present invention relates to photopolymerizable resin composition inducing substantially no chemical degradation in metals in tight contract with the resin. Further, the present invention relates to optical recording media using the photopolymerizable resins. In one embodiment, a photopolymerizable resin composition includes a photopolymerizable resin based on acrylic ester, and an additive based on at least one selected from the group consisting of benzotriazole and a derivative of benzotriazole, and a photointiator.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: February 15, 2005
    Assignee: Sony Chemicals Corp.
    Inventors: Misao Konishi, Yoshiaki Nakata
  • Patent number: 6852773
    Abstract: The invention relates to a photocurable resin composition comprising: (A) a di or more functional urethane (meth)acrylate compound; (B) a monofunctional (meth)acrylate; (C) a photoinitiator; and (D) a polyoxyalkylene alkyl ether phosphate represented by the following formula (2): and to cured products obtained from the resins composition.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: February 8, 2005
    Assignee: DSM IP Assets B.V.
    Inventors: Takayoshi Tanabe, Jiro Ueda, Tetsuya Yamamura, Takashi Ukachi
  • Patent number: 6841220
    Abstract: The dielectric recording medium is provided with a dielectric material, a conductive thin film, and a substrate. The conductive thin film and the substrate are bonded by a resin adhesive. The dielectric material is constructed of a ferroelectric single crystal having a uniform thickness, and its one surface is used for a recording and/or reproducing surface, on the order of mm on a side and about 5000 ? thick. The conductive thin film, about 1000 to 2000 ? thick, is placed on a surrounding portion and a back surface of the recording and/or reproducing surface of the dielectric material. The substrate is intended to preserve the thin dielectric material and maintain the planarity, and concave portions are formed on the adhesive surface. The concave portions absorb excessive resin adhesive when the dielectric material is bonded onto the substrate, which makes the adhesive surface uniform and flat.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: January 11, 2005
    Assignees: Pioneer Corporation
    Inventors: Atsushi Onoe, Yasuo Cho
  • Publication number: 20040253486
    Abstract: CoCrPtB is a conventional material used in some of the layers of a thin film magnetic media structure used for recording data in data storage devices such as hard drives. Typically the CoCrPtB layers used for magnetic media have high Cr and low B in bottom magnetic layers and low Cr and high B in top magnetic layers. In accordance with one embodiment of this invention and to improve media electrical performance, fifth elements, such as Ta, Nb and Hf, etc. were added to the CoCrPtB materials, resulting in CoCrPtB—X, to enhance the grain segregation. The five element CoCrPtB—X layers were deposited using a pulsed direct current sputter technique instead of conventional direct current sputtering techniques. The resulting magnetic media structure having CoCrPtB—X alloy layers exhibits an increase in coercivity Hc and improvement in recording performance.
    Type: Application
    Filed: May 27, 2004
    Publication date: December 16, 2004
    Inventors: Charles Changqing Chen, Thanh Thien Ha, Abebe Hailu, Taesun Ernest Kim, Mariana Rodica Munteanu, Steve Kuo-Hsing Hwang
  • Publication number: 20040247816
    Abstract: An optical disc-producing sheet 1, which has an adhesive layer 11 having a specific heat capacity after curing of not more than 1.9 J/g·° C. at 80° C. and a protective sheet 12, is laminated onto an information recording layer 3 (a laminate of a reflecting layer 31, a dielectric layer 32, a phase change layer 33 and a dielectric layer 32′) formed on an optical recording medium substrate 2. According to this optical disc, recorded information can be reproduced accurately even in the case that recording/erasure or reproduction of information has been carried out repeatedly.
    Type: Application
    Filed: April 13, 2004
    Publication date: December 9, 2004
    Inventors: Takeshi Yamasaki, Tomomi Yukumoto, Sou Miyata, Kazuya Katoh, Shin Kubota
  • Patent number: 6815035
    Abstract: An article is disclosed that includes: a) a first polycarbonate substrate; b) a second polycarbonate substrate; and c) an adhesive composition disposed between the first polycarbonate substrate and the second polycarbonate substrate such that the first polycarbonate substrate is bonded to said second polycarbonate substrate through the adhesive composition; the adhesive composition includes an adhesive polymer that includes the reaction product of 1) an N-vinyl containing monomer selected from the group consisting of N-vinyl caprolactam, N-vinyl pyrrolidone, and N-vinylimidazole, and combinations thereof, and 2) an acrylic acid ester monomer of a non-tertiary alcohol having an alkyl group that includes 4 to 20 carbon atoms.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: November 9, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Richard E. Bennett, Greggory S. Bennett, Michele A. Craton, Shih-Hung Chou
  • Publication number: 20040170119
    Abstract: There are provided an optical disc that can be made highly-reliable by suppressing the occurrence of drawback such as warp and an optical disc manufacturing method that can make it possible to manufacture a highly-reliable optical disc with excellent work efficiency.
    Type: Application
    Filed: January 13, 2004
    Publication date: September 2, 2004
    Inventor: Hidetoshi Watanabe
  • Publication number: 20040151869
    Abstract: The present invention provides an adhesive that can provide an excellent durability (reliability) to a bonded optical disk having a translucent reflection film comprising silicone, silver or a silver alloy. The adhesive of the present invention contains a (meth)acrylate monomer (A) having a solution resistance of 1.0×1010 &OHgr;·cm or more.
    Type: Application
    Filed: November 13, 2003
    Publication date: August 5, 2004
    Inventors: Kiyohisa Tokuda, Kazuhiko Ishii, Go Mizutani
  • Patent number: 6767424
    Abstract: The present invention relates to a process for preparing a digital versatile disc. The process of the present invention includes providing a hot melt adhesive containing at least one thermoplastic elastomer, at least one hydrocarbon resin, at least one poly-&agr;-olefin, and at least one polar wax, and providing at least two disc blanks. The hot melt adhesive is applied directly or indirectly to at least one of the blanks and the blanks are bonded together using the hot melt adhesive. The present invention also provides a digital versatile disc containing the hot melt adhesive.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: July 27, 2004
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Ruediger Butterbach, Ulrike Maassen, Dirk Bonke, Siegfried Kopannia
  • Publication number: 20040110098
    Abstract: A method of improving the ability of plastic layers of a multi-layered optical disc to bond to adhesive materials includes exposing the plastic layers to a plurality of ions. In one embodiment, one side of a plastic layer of a multi-layered optical disc is exposed to a plurality of non-reactive ions, an adhesive material is applied to the side of the plastic layer that was exposed to the plurality of ions, and a second layer of the optical disc is secured to the adhesive material. In another embodiment, a plurality of ions is formed by directing gas molecules through an electric field, and at least 25% of the width of the plastic layer of the multi-layered optical disc is exposed to the plurality of ions at about the same time. The plastic layer is positioned so that the ions contact the plastic layer while the ions still have a charge, and the disc is moved so that at least 25% of the surface of the plastic layer is exposed to the plurality of ions.
    Type: Application
    Filed: November 22, 2002
    Publication date: June 10, 2004
    Applicant: NATIONAL FILM LABORATORIES, INC. dba CREST NATIONAL
    Inventors: Barry Alexander Singer, Robert I. Freedman
  • Patent number: 6737144
    Abstract: The optical recording medium of this invention includes: a first substrate having a first information surface; a semitransparent reflection film formed on the first information surface of the first substrate; a second substrate having a second information surface; a reflection film formed on the second information surface of the second substrate; and an adhesive layer for adhering the first substrate and the second substrate so that the first information surface and the second information surface face each other, wherein the thickness of the first substrate is 0.56 mm or more, the thickness of the adhesive layer is 30 &mgr;m or more, and the total thickness of the first substrate and the adhesive layer is 0.68 mm or less.
    Type: Grant
    Filed: October 9, 2002
    Date of Patent: May 18, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mitsurou Moriya, Shin-ichi Tanaka, Yasuhiro Sugihara, Hiroshi Taniguchi, Michiyoshi Nagashima