Patents by Inventor Ryuuta Yamada
Ryuuta Yamada 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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Patent number: 9324964Abstract: An organic EL element including anode, hole injection layer, buffer layer, light-emitting layer, and cathode, layered on substrate in the stated order, and banks defining a light-emission region, and having excellent light-emission characteristics, due to the hole injection layer having excellent hole injection efficiency, being a tungsten oxide layer including an oxygen vacancy structure, formed under predetermined conditions to have an occupied energy level within a binding energy range from 1.8 eV to 3.6 eV lower than a lowest binding energy of a valence band, and after formation, subjected to atmospheric firing at a temperature within 200 ° C. -230 ° C. inclusive for a processing time of 15-45 minutes inclusive to have increased film density and improved dissolution resistance against an etching solution, a cleaning liquid, etc., used in a bank forming process.Type: GrantFiled: July 15, 2011Date of Patent: April 26, 2016Assignee: JOLED INC.Inventors: Ryuuta Yamada, Satoru Ohuchi, Takahiro Komatsu, Shinya Fujimura, Hirofumi Fujita
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Patent number: 9224956Abstract: A method for reducing an internal pressure of a vacuum chamber while preventing impurity contamination within the vacuum chamber as much as possible is provided. The method includes: rough pumping reducing an internal pressure of a vacuum chamber by using a roughing pump, the roughing pump being a mechanical pump that is capable of reducing the internal pressure of the vacuum chamber to be less than 15 Pa; main pumping reducing the internal pressure of the vacuum chamber by using a main pump after the rough pumping, the main pump being a non-mechanical pump. Transition from the rough pumping to the main pumping is performed when the internal pressure of the vacuum chamber is no less than 15 Pa.Type: GrantFiled: March 19, 2013Date of Patent: December 29, 2015Assignee: JOLED INC.Inventors: Yuko Kawanami, Ryuuta Yamada
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Patent number: 9112189Abstract: Method for manufacturing organic EL element including anode, hole injection layer, buffer layer, light-emitting layer, and cathode, layered on substrate in the stated order, and banks defining a light-emission region, and having excellent light-emission characteristics, due to the hole injection layer having excellent hole injection efficiency, being a tungsten oxide layer including an oxygen vacancy structure, formed under predetermined conditions to have an occupied energy level within a binding energy range from 1.8 eV to 3.6 eV lower than a lowest binding energy of a valence band, and after formation, subjected to atmospheric firing at a temperature within 200° C.-230° C. inclusive for a processing time of 15-45 minutes inclusive to have increased film density and improved dissolution resistance against an etching solution, a cleaning liquid, etc., used in a bank forming process.Type: GrantFiled: July 15, 2011Date of Patent: August 18, 2015Assignee: JOLED INC.Inventors: Ryuuta Yamada, Satoru Ohuchi, Takahiro Komatsu, Shinya Fujimura, Hirofumi Fujita
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Patent number: 9065069Abstract: Method for manufacturing organic EL element including anode, hole injection layer, buffer layer, light-emitting layer, and cathode, layered on substrate in the stated order, and banks defining a light-emission region, and having excellent light-emission characteristics, due to the hole injection layer having excellent hole injection efficiency, being a tungsten oxide layer including an oxygen vacancy structure, formed under predetermined conditions to have an occupied energy level within a binding energy range from 1.8 eV to 3.6 eV lower than a lowest binding energy of a valence band, and after formation, subjected to atmospheric firing at a temperature within 200° C.-230° C. inclusive for a processing time of 15-45 minutes inclusive to have increased film density and improved dissolution resistance against an etching solution, a cleaning liquid, etc., used in a bank forming process.Type: GrantFiled: July 15, 2011Date of Patent: June 23, 2015Assignee: JOLED INC.Inventors: Ryuuta Yamada, Satoru Ohuchi, Takahiro Komatsu, Shinya Fujimura, Hirofumi Fujita
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Publication number: 20150087098Abstract: A method for reducing an internal pressure of a vacuum chamber while preventing impurity contamination within the vacuum chamber as much as possible. The method includes: rough pumping reducing an internal pressure of a vacuum chamber (1) by using a roughing pump (2), the roughing pump (2) being a mechanical pump that is capable of reducing the internal pressure of the vacuum chamber (1) to be less than 15 Pa; main pumping reducing the internal pressure of the vacuum chamber (1) by using a main pump (3) after the rough pumping, the main pump (3) being a non-mechanical pump. Transition from the rough pumping to the main pumping is performed when the internal pressure of the vacuum chamber (1) is no less than 15 Pa.Type: ApplicationFiled: March 19, 2013Publication date: March 26, 2015Applicant: PANASONIC CORPORATIONInventors: Yuko Kawanami, Ryuuta Yamada
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Patent number: 8981361Abstract: A hole injection layer and a second electrode are both formed to be continuous above a first electrode and above an auxiliary wiring. The hole injection layer contains a tungsten oxide. An UPS spectrum, obtained from a UPS measurement, has a protrusion appearing near a Fermi surface and within a region corresponding to a binding energy range lower than a top of a valence band, and the tungsten oxide satisfies a condition, determined from an XPS measurement, that a ratio in a number density of atoms other than tungsten atoms and oxygen atoms to the tungsten atoms does not exceed 0.83.Type: GrantFiled: November 18, 2011Date of Patent: March 17, 2015Assignee: Panasonic CorporationInventors: Satoru Ohuchi, Takahiro Komatsu, Ryuuta Yamada, Hirofumi Fujita, Shinya Fujimura, Seiji Nishiyama, Kenichi Nendai, Kou Sugano, Shuhei Yada
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Patent number: 8963415Abstract: An organic EL element comprises: a transparent electrode; a reflective electrode opposite the transparent electrode; and a light-emitting layer having a film thickness of 20 nm to 200 nm, between the electrodes. The reflective electrode is a layered film of: a metal film including Al as a main component and having a film thickness of at least 43 nm; and a Ni film, whose film thickness d satisfies: 0 nm<d <5 nm, layered with respect to an entirety of a surface, facing the light-emitting layer, of the metal film, without interposition of an oxide layer that covers the surface of the metal film entirely. A surface of the layered film facing the light-emitting layer has an average roughness Ra satisfying: 0.6 nm?Ra<2.0 nm and a maximum height difference Rmax satisfying: 5 nm?Rmax<20 nm.Type: GrantFiled: November 15, 2010Date of Patent: February 24, 2015Assignee: Panasonic CorporationInventors: Kou Sugano, Ryuuta Yamada
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Patent number: 8957412Abstract: An organic EL panel comprises anodes, a cathode, organic light-emitting layers, and first functional layers each including a hole injection layer and a hole transport layer. The hole injection layer of each of the R, G, and B colors is made of only a metal oxide including tungsten oxide, and has a thickness of 5 nm to 40 nm. At least one of the hole injection layers has a thickness different from the other hole injection layers. The hole transport layers of the R, G, and B colors are equivalent in thickness. The organic light-emitting layers of the R, G, and B colors are equivalent in thickness.Type: GrantFiled: November 29, 2010Date of Patent: February 17, 2015Assignee: Panasonic CorporationInventors: Ryuuta Yamada, Keiko Kurata, Shinya Fujimura, Hirofumi Fujita, Yoshiaki Tsukamoto, Takahiro Komatsu, Satoru Ohuchi
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Patent number: 8884281Abstract: Provided is an organic EL element which withstands mass production of organic EL display panels, and promises driving at a low voltage and high luminous efficiency due to excellent hole-injection efficiency. Specifically, an organic EL element is formed by sequentially laminating an anode, a hole injection layer, a buffer layer, a light-emitting layer, and a cathode on one surface of a substrate. The hole injection layer is a at least 2 nm thick tungsten oxide layer formed under predetermined film forming conditions, and includes an occupied energy level that is 1.8 eV to 3.6 eV lower than a lowest energy level of a valence band of the hole injection layer in terms of a binding energy. This reduces the hole injection barrier between the anode and the hole injection layer and the hole injection barrier between the hole injection layer and the buffer layer.Type: GrantFiled: January 21, 2011Date of Patent: November 11, 2014Assignee: Panasonic CorporationInventors: Satoru Ohuchi, Ryuuta Yamada, Takahiro Komatsu, Shinya Fujimura, Hirofumi Fujita, Kenichi Nendai, Kou Sugano, Shuhei Yada
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Patent number: 8884276Abstract: Provided is organic EL display panel and an organic EL display apparatus that can be driven at a low voltage and that exhibit excellent light-emitting efficiency. Included are a substrate, a first electrode, an auxiliary wiring, a hole injection layer, a functional layer, and a second electrode. The hole injection layer and the second electrode are formed to be continuous above the first electrode and above the auxiliary wiring. The second electrode and the auxiliary wiring are electrically connected by the hole injection layer in an organic EL display panel. The hole injection layer is a metal oxide film, and metal atoms constituting the metal oxide include both metal atoms at a maximum valence thereof and metal atoms at a valence less than the maximum valence. The metal oxide film includes a metal oxide crystal with a particle diameter on the order of nanometers.Type: GrantFiled: October 25, 2012Date of Patent: November 11, 2014Assignee: Panasonic CorporationInventors: Takahiro Komatsu, Satoru Ohuchi, Ryuuta Yamada, Hirofumi Fujita, Shinya Fujimura, Seiji Nishiyama, Kenichi Nendai, Kou Sugano, Shuhei Yada
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Patent number: 8829510Abstract: The present invention provides an organic EL display panel and an organic EL display apparatus that can be driven at a low voltage and that exhibit excellent light-emitting efficiency. Sequentially fixated on a substrate are: a first electrode; auxiliary wiring; a hole injection layer; a functional layer; and a second electrode. The hole injection layer and the second electrode are both formed to be continuous above the first electrode and above the auxiliary wiring. The second electrode and the auxiliary wiring are electrically connected by the hole injection layer. The hole injection layer contains tungsten oxide and at least 2 nm thick so as to have, in an electronic state thereof, an occupied energy level in a range between 1.8 eV and 3.6 eV lower than a lowest energy level of a valence band in terms of a binding energy.Type: GrantFiled: January 18, 2012Date of Patent: September 9, 2014Assignee: Panasonic CorporationInventors: Takahiro Komatsu, Satoru Ohuchi, Ryuuta Yamada, Hirofumi Fujita, Shinya Fujimura, Seiji Nishiyama, Kenichi Nendai, Kou Sugano, Shuhei Yada
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Publication number: 20140147952Abstract: Method for manufacturing organic EL element including anode, hole injection layer, buffer layer, light-emitting layer, and cathode, layered on substrate in the stated order, and banks defining a light-emission region, and having excellent light-emission characteristics, due to the hole injection layer having excellent hole injection efficiency, being a tungsten oxide layer including an oxygen vacancy structure, formed under predetermined conditions to have an occupied energy level within a binding energy range from 1.8 eV to 3.6 eV lower than a lowest binding energy of a valence band, and after formation, subjected to atmospheric firing at a temperature within 200° C.-230° C. inclusive for a processing time of 15-45 minutes inclusive to have increased film density and improved dissolution resistance against an etching solution, a cleaning liquid, etc., used in a bank forming process.Type: ApplicationFiled: July 15, 2011Publication date: May 29, 2014Applicant: PANASONIC CORPORATIONInventors: Ryuuta Yamada, Satoru Ohuchi, Takahiro Komatsu, Shinya Fujimura, Hirofumi Fujita
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Publication number: 20140145172Abstract: An organic EL element including anode, hole injection layer, buffer layer, light-emitting layer, and cathode, layered on substrate in the stated order, and banks defining a light-emission region, and having excellent light-emission characteristics, due to the hole injection layer having excellent hole injection efficiency, being a tungsten oxide layer including an oxygen vacancy structure, formed under predetermined conditions to have an occupied energy level within a binding energy range from 1.8 eV to 3.6 eV lower than a lowest binding energy of a valence band, and after formation, subjected to atmospheric firing at a temperature within 200° C.-230° C. inclusive for a processing time of 15-45 minutes inclusive to have increased film density and improved dissolution resistance against an etching solution, a cleaning liquid, etc., used in a bank forming process.Type: ApplicationFiled: July 15, 2011Publication date: May 29, 2014Applicant: PANASONIC CORPORATIONInventors: Ryuuta Yamada, Satoru Ohuchi, Takahiro Komatsu, Shinya Fujimura, Hirofumi Fujita
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Publication number: 20140127846Abstract: Method for manufacturing organic EL element including anode, hole injection layer, buffer layer, light-emitting layer, and cathode, layered on substrate in the stated order, and banks defining a light-emission region, and having excellent light-emission characteristics, due to the hole injection layer having excellent hole injection efficiency, being a tungsten oxide layer including an oxygen vacancy structure, formed under predetermined conditions to have an occupied energy level within a binding energy range from 1.8 eV to 3.6 eV lower than a lowest binding energy of a valence band, and after formation, subjected to atmospheric firing at a temperature within 200° C.-230° C. inclusive for a processing time of 15-45 minutes inclusive to have increased film density and improved dissolution resistance against an etching solution, a cleaning liquid, etc., used in a bank forming process.Type: ApplicationFiled: July 15, 2011Publication date: May 8, 2014Applicant: PANASONIC CORPORATIONInventors: Ryuuta Yamada, Satoru Ohuchi, Takahiro Komatsu, Shinya Fujimura, Hirofumi Fujita
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Patent number: 8642360Abstract: A resin material layer including photosensitive resin material is formed on an interlayer on an underlayer. By partially exposing and developing the resin material layer using developer in which the resin material layer and the interlayer are soluble, an uncured portion of the resin material layer is removed to form an opening penetrating to the interlayer, and the developer infiltrates into the interlayer via the opening to remove at least surfaces of first and second portions of the interlayer. The first portion corresponds to the opening. The second portion surrounds the first portion. Each bank is formed by heating a remaining portion of the resin material layer to soften an overhanging portion above a space formed by the surface of the second portion being removed, so that the overhanging portion flows downward to fill the space, cover an exposed portion of the interlayer, and contact the underlayer or the interlayer.Type: GrantFiled: November 4, 2011Date of Patent: February 4, 2014Assignee: Panasonic CorporationInventors: Takahiro Komatsu, Takayuki Takeuchi, Tetsuro Kondoh, Ryuuta Yamada
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Publication number: 20130328039Abstract: A hole injection layer and a second electrode are both formed to be continuous above a first electrode and above an auxiliary wiring. The hole injection layer contains a tungsten oxide. An UPS spectrum, obtained from a UPS measurement, has a protrusion appearing near a Fermi surface and within a region corresponding to a binding energy range lower than a top of a valence band, and the tungsten oxide satisfies a condition, determined from an XPS measurement, that a ratio in a number density of atoms other than tungsten atoms and oxygen atoms to the tungsten atoms does not exceed 0.83.Type: ApplicationFiled: November 18, 2011Publication date: December 12, 2013Applicant: PANASONIC CORPORATIONInventors: Satoru Ohuchi, Takahiro Komatsu, Ryuuta Yamada, Hirofumi Fujita, Shinya Fujimura, Seiji Nishiyama, Kenichi Nendai, Kou Sugano, Shuhei Yada
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Publication number: 20130313543Abstract: Provided is an organic EL element which withstands mass production of organic EL display panels, and promises driving at a low voltage and high luminous efficiency due to excellent hole-injection efficiency. Specifically, an organic EL element is formed by sequentially laminating an anode, a hole injection layer, a buffer layer, a light-emitting layer, and a cathode on one surface of a substrate. The hole injection layer is a at least 2 nm thick tungsten oxide layer formed under predetermined film forming conditions, and includes an occupied energy level that is 1.8 eV to 3.6 eV lower than a lowest energy level of a valence band of the hole injection layer in terms of a binding energy. This reduces the hole injection barrier between the anode and the hole injection layer and the hole injection barrier between the hole injection layer and the buffer layer.Type: ApplicationFiled: January 21, 2011Publication date: November 28, 2013Applicant: PANASONIC CORPORATIONInventors: Satoru Ohuchi, Ryuuta Yamada, Takahiro Komatsu, Shinya Fujimura, Hirofumi Fujita, Kenichi Nendai, Kou Sugano, Shuhei Yada
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Publication number: 20130285042Abstract: The present invention provides an organic EL display panel and an organic EL display apparatus that can be driven at a low voltage and that exhibit excellent light-emitting efficiency. Sequentially fixated on a substrate are: a first electrode; auxiliary wiring; a hole injection layer; a functional layer; and a second electrode. The hole injection layer and the second electrode are both formed to be continuous above the first electrode and above the auxiliary wiring. The second electrode and the auxiliary wiring are electrically connected by the hole injection layer. The hole injection layer contains tungsten oxide and at least 2 nm thick so as to have, in an electronic state thereof, an occupied energy level in a range between 1.8 eV and 3.6 eV lower than a lowest energy level of a valence band in terms of a binding energy.Type: ApplicationFiled: January 18, 2012Publication date: October 31, 2013Applicant: PANASONIC CORPORATIONInventors: Takahiro Komatsu, Satoru Ohuchi, Ryuuta Yamada, Hirofumi Fujita, Shinya Fujimura, Seiji Nishiyama, Kenichi Nendai, Kou Sugano, Shuhei Yada
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Publication number: 20130240854Abstract: An organic EL element comprises: a transparent electrode; a reflective electrode opposite the transparent electrode; and a light-emitting layer having a film thickness of 20 nm to 200 nm, between the electrodes. The reflective electrode is a layered film of: a metal film including Al as a main component and having a film thickness of at least 43 nm; and a Ni film, whose film thickness d satisfies: 0 nm<d<5 nm, layered with respect to an entirety of a surface, facing the light-emitting layer, of the metal film, without interposition of an oxide layer that covers the surface of the metal film entirely. A surface of the layered film facing the light-emitting layer has an average roughness Ra satisfying: 0.6 nm?Ra<2.0 nm and a maximum height difference Rmax satisfying: 5 nm?Rmax<20 nm.Type: ApplicationFiled: November 15, 2010Publication date: September 19, 2013Applicant: PANASONIC CORPORATIONInventors: Kou Sugano, Ryuuta Yamada
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Publication number: 20130234129Abstract: An organic EL panel comprises anodes, a cathode, organic light-emitting layers, and first functional layers each including a hole injection layer and a hole transport layer. The hole injection layer of each of the R, G, and B colors is made of only a metal oxide including tungsten oxide, and has a thickness of 5 nm to 40 nm. At least one of the hole injection layers has a thickness different from the other hole injection layers. The hole transport layers of the R, G, and B colors are equivalent in thickness. The organic light-emitting layers of the R, G, and B colors are equivalent in thickness.Type: ApplicationFiled: November 29, 2010Publication date: September 12, 2013Applicant: PANASONIC CORPORATIONInventors: Ryuuta Yamada, Keiko Kurata, Shinya Fujimura, Hirofumi Fujita, Yoshiaki Tsukamoto, Takahiro Komatsu, Satoru Ohuchi