Patents by Inventor Mitsuaki Oyamada
Mitsuaki Oyamada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20140050877Abstract: 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: ApplicationFiled: August 5, 2013Publication date: February 20, 2014Applicant: Sony CorporationInventors: Yo Ota, Shiori Tashiro, Koichi Yasuda, Hiroshi Uchiyama, Shinya Narumi, Kenji Takayanagi, Mitsuaki Oyamada, Tetsuhiro Sakamoto
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Publication number: 20140037921Abstract: An optical information recording medium includes multiple laminated resin layers. At least one of interfaces between the resin layers has a refractive index which gradually changes in a thickness direction of the resin layers.Type: ApplicationFiled: July 22, 2013Publication date: February 6, 2014Applicant: Sony CorporationInventors: Yo Ota, Tetsuhiro Sakamoto, Shiori Tashiro, Koichi Yasuda, Hiroshi Uchiyama, Mitsuaki Oyamada
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Patent number: 8541086Abstract: An optical information recording medium including a recording layer that can record a large amount of information is manufactured using a simple system. A single recording layer is formed by bonding two optically transparent substrates on which the first photosensitive polymer and the second photosensitive polymer are spread such that the layers of the photosensitive polymers face each other. Furthermore, since the absorptivity of light in the recording layer increases as the focal point of light for information recording moves in a depth direction, information can be recorded without decreasing the recording transfer rate of the information.Type: GrantFiled: October 22, 2008Date of Patent: September 24, 2013Assignee: Sony CorporationInventors: Mitsuaki Oyamada, Norihiro Tanabe
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Patent number: 8526289Abstract: An optical information reproducing apparatus includes: an irradiation section irradiating a light beam onto an optical information recording medium, in which holes are formed along a virtual track on a recording medium, along the virtual track; a light receiving section receiving a reflected light beam when the light beam is reflected by the optical information recording medium and sequentially generating a light receiving signal corresponding to the light intensity; a detection section detecting a variation pattern appearing when a signal level of the light receiving signal changes according to the hole; and a code string generating section, when generating a code string corresponding to the signal level, generating a code corresponding to the one hole from the variation pattern if the variation pattern falls within a range and generating a code string, which includes a plurality of codes, from the variation pattern if the variation pattern exceeds the range.Type: GrantFiled: June 10, 2010Date of Patent: September 3, 2013Assignee: Sony CorporationInventors: Goro Fujita, Daisuke Ueda, Mitsuaki Oyamada, Takashi Iwamura, Kimihiro Saito, Jingcheng Yuan
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Publication number: 20130095286Abstract: A recording layer is formed from an organic material (thermoplastic resin, thermosetting resin) having an oxygen element ratio of 9.1% or more. Examples include polyethersulfone, polyimide, and polyethylene. Alternatively, the recording layer is formed from a material in which a low-molecular compound is added to a resin and which has an oxygen element ratio after mixing of 9.1% or more.Type: ApplicationFiled: June 24, 2011Publication date: April 18, 2013Applicant: SONY CORPORATIONInventors: Yo Ota, Takashi Iwamura, Mitsuaki Oyamada, Daisuke Ueda
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Patent number: 8116194Abstract: The invention is able to enhance a recording speed. In the invention, a recording mark (RM) composed of a cavity is formed by vaporizing a two-photon absorbing material by a two-photon absorption reaction as an embodiment of a photoreaction against a recording light beam (L1) as recording light to be condensed at the time of recording information. Also, in a recording layer (101), the information is reproduced on the basis of a return light beam (L3) formed by modulation of a readout light beam (L2) irradiated as prescribed readout light at the time of reproducing inform in conformity with the presence of absence of the recording mark (RM).Type: GrantFiled: January 8, 2009Date of Patent: February 14, 2012Assignee: Sony CorporationInventors: Takashi Iwamura, Mitsuaki Oyamada, Daisuke Ueda
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Publication number: 20110044156Abstract: An optical information recording medium including a recording layer that can record a large amount of information is manufactured using a simple system. A single recording layer is formed by bonding two optically transparent substrates on which the first photosensitive polymer and the second photosensitive polymer are spread such that the layers of the photosensitive polymers face each other. Furthermore, since the absorptivity of light in the recording layer increases as the focal point of light for information recording moves in a depth direction, information can be recorded without decreasing the recording transfer rate of the information.Type: ApplicationFiled: October 22, 2008Publication date: February 24, 2011Applicant: SONY CORPORATIONInventors: Mitsuaki Oyamada, Norihiro Tanabe
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Publication number: 20100322063Abstract: An optical information reproducing apparatus includes: an irradiation section irradiating a light beam onto an optical information recording medium, in which holes are formed along a virtual track on a recording medium, along the virtual track; a light receiving section receiving a reflected light beam when the light beam is reflected by the optical information recording medium and sequentially generating a light receiving signal corresponding to the light intensity; a detection section detecting a variation pattern appearing when a signal level of the light receiving signal changes according to the hole; and a code string generating section, when generating a code string corresponding to the signal level, generating a code corresponding to the one hole from the variation pattern if the variation pattern falls within a range and generating a code string, which includes a plurality of codes, from the variation pattern if the variation pattern exceeds the range.Type: ApplicationFiled: June 10, 2010Publication date: December 23, 2010Applicant: Sony CorporationInventors: Goro Fujita, Daisuke Ueda, Mitsuaki Oyamada, Takashi Iwamura, Kimihiro Saito, Jingcheng Yuan
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Publication number: 20100189948Abstract: The invention allows two-photon absorption to occur in response to a short-wavelength light beam. The recording layer (101) of the optical information recording medium (100) of the invention contains, as a two-photon absorbing material, a compound represented by general formula (1) having a hexadiyne structure that includes in the center thereof two acetylene groups connected by a ?-bond. At the time of information recording where a recording mark (RM) is formed in the recording layer (101), two-photon absorption occurs in response to a condensed, short-wavelength recording light, whereby the recording mark (RM) is formed.Type: ApplicationFiled: May 11, 2009Publication date: July 29, 2010Inventors: Takashi Iwamura, Mitsuaki Oyamada, Daisuke Ueda
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Publication number: 20100182895Abstract: An optical information recording medium includes a recording layer in which a recording mark formed of a cavity is formed in accordance with a light for recording, and which contains therein a compound having a skeleton expressed by the general formula (1): where R1, R2, R3, and R4 are either hydrogen atoms or substituents.Type: ApplicationFiled: January 12, 2010Publication date: July 22, 2010Applicant: Sony CorporationInventors: Mitsuaki Oyamada, Takashi Iwamura, Daisuke Ueda, Takehide Endo
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Publication number: 20100110858Abstract: The invention is able to enhance a recording speed. In the invention, a recording mark (RM) composed of a cavity is formed by vaporizing a two-photon absorbing material by a two-photon absorption reaction as an embodiment of a photoreaction against a recording light beam (L1) as recording light to be condensed at the time of recording information. Also, in a recording layer (101), the information is reproduced on the basis of a return light beam (L3) formed by modulation of a readout light beam (L2) irradiated as prescribed readout light at the time of reproducing inform in conformity with the presence of absence of the recording mark (RM).Type: ApplicationFiled: January 8, 2009Publication date: May 6, 2010Applicant: SONY CORPORATIONInventors: Takashi Iwamura, Mitsuaki Oyamada, Daisuke Ueda
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Publication number: 20090073845Abstract: An optical recording medium using Sn as the recording material to improve the jitter is provided, in which on the surface of a disc substrate 11 where a concave and convex shape dividing a track area is formed, are formed on the surface of the concave and convex shape a first protective layer 31 for protecting at least an optical recording layer 31, an optical recording layer 12 using a chemical compound at least composed of tin (Sn), nitrogen (N) and oxygen (O), formed on the first protective layer, a second protective layer 32 for protecting this optical recording layer, formed on this optical recording layer, and a light-transmittable layer 13 formed on the second protective layer; with this structure, the optical recording layer 12 under high temperature and high humidity can be stabilized by means of the first and second protective layers 31 and 32.Type: ApplicationFiled: November 5, 2008Publication date: March 19, 2009Applicant: Sony CorporationInventors: Kouichi Yasuda, Mitsuaki Oyamada, Jun Nakano, Norio Mitsui, Sakuya Tamada
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Patent number: 7468200Abstract: A write once optical recording medium has an inorganic recording film which includes an oxide film having germanium oxide (GeO) as a principal component, and a metal film adjacent to the oxide film, the metal film having a titanium/silicon alloy (TiSi) as a principal component. According to this arrangement, it is possible to construct an inexpensive write once optical recording medium with large strength capable of high density recording by using a short wavelength light source and an optical system with a high numerical aperture having excellent characteristics.Type: GrantFiled: March 10, 2006Date of Patent: December 23, 2008Assignee: Sony CorporationInventors: Yuichi Sabi, Etsuro Ikeda, Mitsuaki Oyamada
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Patent number: 7464391Abstract: An optical recording medium using Sn as the recording material to improve the jitter is provided, in which on the surface of a disc substrate 11 where a concave and convex shape dividing a track area is formed, are formed on the surface of the concave and convex shape a first protective layer 31 for protecting at least an optical recording layer 31, an optical recording layer 12 using a chemical compound at least composed of tin (Sn), nitrogen (N) and oxygen (O), formed on the first protective layer, a second protective layer 32 for protecting this optical recording layer, formed on this optical recording layer, and a light-transmittable layer 13 formed on the second protective layer; with this structure, the optical recording layer 12 under high temperature and high humidity can be stabilized by means of the first and second protective layers 31 and 32.Type: GrantFiled: March 10, 2004Date of Patent: December 9, 2008Assignee: Sony CorporationInventors: Kouichi Yasuda, Mitsuaki Oyamada, Jun Nakano, Norio Mitsui, Sakuya Tamada
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Patent number: 7427431Abstract: A write once optical recording medium includes a substrate on which an oxide film serving as an inorganic recording film is formed, the oxide film being made of a recording material of an oxide Ge1Ox (x is an atomic number ratio) of germanium (Ge) and a composition of Ge1Ox of the oxide film being specified so as to satisfy 1.0<x<2.0.Type: GrantFiled: April 22, 2005Date of Patent: September 23, 2008Assignee: Sony CorporationInventors: Yuichi Sabi, Mitsuaki Oyamada, Katsuhisa Aratani
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Publication number: 20070141294Abstract: An optical recording medium using Sn as the recording material to improve the jitter is provided, in which on the surface of a disc substrate 11 where a concave and convex shape dividing a track area is formed, are formed on the surface of the concave and convex shape a first protective layer 31 for protecting at least an optical recording layer 31, an optical recording layer 12 using a chemical compound at least composed of tin (Sn), nitrogen (N) and oxygen (O), formed on the first protective layer, a second protective layer 32 for protecting this optical recording layer, formed on this optical recording layer, and a light-transmittable layer 13 formed on the second protective layer; with this structure, the optical recording layer 12 under high temperature and high humidity can be stabilized by means of the first and second protective layers 31 and 32.Type: ApplicationFiled: March 10, 2004Publication date: June 21, 2007Inventors: Kouichi Yasuda, Mitsuaki Oyamada, Jun Nakano, Norio Mitsui, Sakuya Tamada
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Publication number: 20060246249Abstract: A write once optical recording medium has an inorganic recording film which includes an oxide film having germanium oxide (GeO) as a principal component, and a metal film adjacent to the oxide film, the metal film having a titanium/silicon alloy (TiSi) as a principal component. According to this arrangement, it is possible to construct an inexpensive write once optical recording medium with large strength capable of high density recording by using a short wavelength light source and an optical system with a high numerical aperture having excellent characteristics.Type: ApplicationFiled: March 10, 2006Publication date: November 2, 2006Applicant: Sony CorporationInventors: Yuichi Sabi, Etsuro Ikeda, Mitsuaki Oyamada
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Patent number: 7092343Abstract: An optical recording medium having two or more information recording layers in which information is recorded at a high recording density. The optical recording medium is comprised of information recording layers between a first surface at which light is incident and a second surface opposite the first surface. The first information recording layer nearest to the second surface is a phase-modulation information recording layer, and the second information recording layer is a reflectance-modulation information recording layer.Type: GrantFiled: January 22, 2003Date of Patent: August 15, 2006Assignee: Sony CorporationInventors: Yuichi Sabi, Takashi Iwamura, Mitsuaki Oyamada, Sakuya Tamada
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Publication number: 20060088786Abstract: A rewritable optical information recording medium including a recording layer composed of an organic dye film is provided, in which recording and erasing information can be performed reversibly by laser light irradiation. A rewritable optical information recording medium including at least one organic dye film which is substantially made of only at least one kind of organic dye compounds as a recording film is provided. The recording and erasure of information are performed by a reversible physical change of the organic dye film substance caused by laser light irradiation.Type: ApplicationFiled: February 14, 2003Publication date: April 27, 2006Inventors: Sakuya Tamada, Takashi Iwamura, Yuichi Sabi, Mitsuaki Oyamada, Masanobu Yamamoto, Tadashi Koike, Tatsumi Misawa, Akira Ogiso, Ryousuke Nara, Jun Tokuhiro, Hisashi Tsukahara
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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