Patents by Inventor Mitsushi Ikeda
Mitsushi Ikeda 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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Method for manufacturing X-ray flat panel detector and X-ray flat panel detector TFT array substrate
Patent number: 9589855Abstract: A common interconnect ring is provided at a periphery of a portion used to form a TFT array of an X-ray flat panel detector, and an X-ray flat panel detector TFT array substrate connected to signal lines and scanning lines via pairs of two protection diodes connected in parallel and having mutually-reverse polarities is manufactured. When inspecting the X-ray flat panel detector TFT array substrate, the same reference bias voltage as the amplifier of a detection circuit is applied from an external voltage application pad provided at the vicinity of a connection unit for the common interconnect ring and the protection diodes on the same side of the signal lines, a signal is provided to a scanning line connection pad to switch the thin film transistor ON, and an electrical signal flowing through the signal line is read from a signal line connection pad.Type: GrantFiled: October 17, 2014Date of Patent: March 7, 2017Assignee: Toshiba Electron Tubes & Devices Co., Ltd.Inventors: Hiroshi Iwata, Mitsushi Ikeda -
METHOD FOR MANUFACTURING X-RAY FLAT PANEL DETECTOR AND X-RAY FLAT PANEL DETECTOR TFT ARRAY SUBSTRATE
Publication number: 20150028338Abstract: A common interconnect ring is provided at a periphery of a portion used to form a TFT array of an X-ray flat panel detector, and an X-ray flat panel detector TFT array substrate connected to signal lines and scanning lines via pairs of two protection diodes connected in parallel and having mutually-reverse polarities is manufactured. When inspecting the X-ray flat panel detector TFT array substrate, the same reference bias voltage as the amplifier of a detection circuit is applied from an external voltage application pad provided at the vicinity of a connection unit for the common interconnect ring and the protection diodes on the same side of the signal lines, a signal is provided to a scanning line connection pad to switch the thin film transistor ON, and an electrical signal flowing through the signal line is read from a signal line connection pad.Type: ApplicationFiled: October 17, 2014Publication date: January 29, 2015Applicants: Kabushiki Kaisha Toshiba, Toshiba Electron Tubes & Devices Co., Ltd.Inventors: Hiroshi IWATA, Mitsushi IKEDA -
Patent number: 7282717Abstract: An X-ray detector (5) comprises an X-ray-electric charge conversion film (21) for directly converting into charges an incident X-ray that has passed through a subject (2) and is received, and a charge information reading section (15) for detecting charges produced by the X-ray-electric charge conversion film (21) as image signals. The X-ray-electric charge conversion film (21) consists essentially of a rare-earth compound containing at least one of rare-earth element and at least one of element selected from oxygen, sulfur, selenium and tellurium. The X-ray-electric charge conversion film (21) does not adversely affect human bodies and environment, and is excellent in sensitivity, film-forming feature and the like. Accordingly, the X-ray detector (5) which is provided with the improved X-ray detection sensitivity, detection accuracy and the like with environmental loads and the like decreased can be provided.Type: GrantFiled: September 25, 2003Date of Patent: October 16, 2007Assignee: Kabushiki Kaisha ToshibaInventors: Masami Okamura, Eiji Oyaizu, Yukihiro Fukuta, Yoshihito Tsutsui, Masaaki Tamatani, Mitsushi Ikeda, Hiroshi Onihashi, Kenichi Ito
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Publication number: 20070181816Abstract: An anisotropic conductive film includes: an insulating material; and a plurality of conductive particles dispersed in the insulating material, the conductive particles provided in a plurality of lines in a first direction along the thickness of the insulating material, the conductive particles in the lines disposed electrically connectable to each other, and the conductive particles in different lines disposed apart from each other in a second direction perpendicular to the first direction.Type: ApplicationFiled: January 31, 2007Publication date: August 9, 2007Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Mitsushi Ikeda, Toshiyuki Oka
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Patent number: 7153589Abstract: A Mo—W material for the formation of wirings is discloses which, as viewed integrally, comprises 20 to 95% of tungsten and the balance of molybdenum and inevitable impurities by atomic percentage. The Mo—W material for wirings is a product obtained by compounding and integrating a Mo material and a W material as by the powder metallurgy technique or the smelting technique or a product obtained by arranging these materials in amounts calculated to account for the percentage composition mentioned above. The Mo—W material containing W in a proportion in the range of from 20 to 95% manifests low resistance and, at the same time, excels in workability and tolerance for etchants. The wiring thin film which is formed of the Mo—W alloy of this percentage composition is used as address wirings and others for liquid crystal display devices.Type: GrantFiled: October 6, 1998Date of Patent: December 26, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Yasuo Kohsaka, Yoshiharu Fukasawa, Yoshiko Tsuji, Mitsushi Ikeda, Michio Sato, Toshihiro Maki
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Publication number: 20060237647Abstract: Signal output of an X-ray-electric conversion layer prevents instability of operation due to variation of a threshold voltage of TFT mounted to read a signal. Pixel electrodes 17 are arranged in an array on the X-ray-electric conversion layer. Variation of the threshold voltage (Vth) is suppressed by applying in compensatory manner a voltage pulse for switch-off having a polarity opposite to an average polarity of a voltage for switch-on at operating period to the gate electrode of a field effect type TFT for pixel switching connected to each pixel electrode to read a signal.Type: ApplicationFiled: May 1, 2006Publication date: October 26, 2006Applicant: Kabushiki Kaisha ToshibaInventors: Mitsushi Ikeda, Akira Kinno, Toshiyuki Oka
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Patent number: 7126128Abstract: A flat panel X-ray detector, including an X-ray-electric-charge converting film containing a metal halide and serving to convert an incident X-ray into an electric charge, a pair of electrodes formed on both surfaces of the X-ray-electric-charge converting film, and a blocking layer formed in contact with at least one surface of the X-ray-electric-charge converting film and containing a substance selected from the group consisting of a metal oxide, a metal nitride, a metal halide oxide, a first mixture of at least two of these materials, and a second mixture of a metal halide and any of these materials.Type: GrantFiled: February 9, 2005Date of Patent: October 24, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Mitsushi Ikeda, Masaki Atsuta, Toshiyuki Oka, Kenichi Mori, Akira Kinno
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Patent number: 7115878Abstract: A flat panel X-ray detector which includes an X-ray-charge conversion film converting incident X-rays into electric charges, and a pair of electrodes disposed in contact with both surfaces of the X-ray-charge conversion film The X-ray-charge conversion film has a laminate structure including a plurality of metal halide films differing in band gap from one another and laminated along direction of c-axis of hexagonal crystal structure, and halogen atoms contained in the plurality of metal halide films are of the same kind among them.Type: GrantFiled: December 8, 2003Date of Patent: October 3, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Mitsushi Ikeda, Toshiyuki Oka, Mutsuki Yamazaki, Masaki Atsuta, Akira Kinno
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Publication number: 20050253077Abstract: A flat panel X-ray detector, including an X-ray-electric-charge converting film containing a metal halide and serving to convert an incident X-ray into an electric charge, a pair of electrodes formed on both surfaces of the X-ray-electric-charge converting film, and a blocking layer formed in contact with at least one surface of the X-ray-electric-charge converting film and containing a substance selected from the group consisting of a metal oxide, a metal nitride, a metal halide oxide, a first mixture of at least two of these materials, and a second mixture of a metal halide and any of these materials.Type: ApplicationFiled: February 9, 2005Publication date: November 17, 2005Inventors: Mitsushi Ikeda, Masaki Atsuta, Toshiyuki Oka, Kenichi Mori, Akira Kinno
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Patent number: 6862338Abstract: There are provided a photoelectric conversion film converting an x-ray to a charge, a switching element composed of a transistor, of which a gate is connected to a corresponding scanning line, a source is connected to the photoelectric conversion film, and a drain is connected to a corresponding signal line, and a accumulation element connected to the photoelectric conversion film and the switching element, accumulating the charged produced in the photoelectric conversion element, a scanning line driving circuit driving the scanning lines, and a signal detection circuit connected to the signal lines and reading out the charge accumulated in the accumulation element. A potential of the photoelectric conversion film and a gate potential of the switching element is set such that an absolute value of a gate-source voltage of the switching element decreases when the charge is accumulated in the accumulation element.Type: GrantFiled: May 13, 2003Date of Patent: March 1, 2005Assignee: Kabushiki Kaisha ToshibaInventors: Akira Kinno, Mitsushi Ikeda
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Patent number: 6849853Abstract: An X-ray flat panel detector includes an X-ray photosensitive film which generates signal charges upon being exposed to incident X-rays, pixel electrodes which are arrayed in contact with the X-ray photosensitive film, a bias voltage application unit which applies a bias voltage to the X-ray photosensitive film so as to make the pixel electrodes collect holes or electrons, which serve as the signal charges generated by the X-ray photosensitive film and have a higher mobility, capacitors which are arranged in correspondence with the pixel electrodes and store the charges generated by the X-ray photosensitive film, switching thin-film transistors which are arranged in correspondence with the pixel electrodes and read the charges in the capacitors, scanning lines which supply a control signal to OPEN/CLOSE-control the switching thin-film transistors, and signal lines which are connected to the switching thin-film transistors to read the charges when the switching thin-film transistors are opened.Type: GrantFiled: October 3, 2002Date of Patent: February 1, 2005Assignee: Kabushiki Kaisha ToshibaInventors: Mitsushi Ikeda, Kouhei Suzuki, Akira Kinno
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Publication number: 20040113087Abstract: A flat panel X-ray detector which includes an X-ray-charge conversion film converting incident X-rays into electric charges, and a pair of electrodes disposed in contact with both surfaces of the X-ray-charge conversion film The X-ray-charge conversion film has a laminate structure including a plurality of metal halide films differing in band gap from one another and laminated along direction of c-axis of hexagonal crystal structure, and halogen atoms contained in the plurality of metal halide films are of the same kind among them.Type: ApplicationFiled: December 8, 2003Publication date: June 17, 2004Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Mitsushi Ikeda, Toshiyuki Oka, Mutsuki Yamazaki, Masaki Atsuta, Akira Kinno
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Patent number: 6713748Abstract: An image detection device includes a pixel portion (OEF) having a photoelectric conversion film for converting incident light into a signal charge and a pixel capacitor for accumulating the signal charge, and a thin film transistor (TFT1) included in a signal detective circuit operation of which is controlled by a scanning line (G1) to read out the potential of a pixel electrode to a signal line (S1). The transistor (TFT1) having a source or drain connected to the pixel electrode is a TFT having an LDD structure on a high-potential side, a TFT having LDD structures on the high- and low-potential sides in which the LDD length is larger on the high-potential side, or a TFT having a double-gate structure.Type: GrantFiled: June 22, 1999Date of Patent: March 30, 2004Assignee: Kabushiki Kaisha ToshibaInventors: Junsei Tsutsumi, Akira Kinno, Mitsushi Ikeda
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Publication number: 20030215058Abstract: There are provided a photoelectric conversion film converting an x-ray to a charge, a switching element composed of a transistor, of which a gate is connected to a corresponding scanning line, a source is connected to the photoelectric conversion film, and a drain is connected to a corresponding signal line, and a accumulation element connected to the photoelectric conversion film and the switching element, accumulating the charged produced in the photoelectric conversion element, a scanning line driving circuit driving the scanning lines, and a signal detection circuit connected to the signal lines and reading out the charge accumulated in the accumulation element. A potential of the photoelectric conversion film and a gate potential of the switching element is set such that an absolute value of a gate-source voltage of the switching element decreases when the charge is accumulated in the accumulation element.Type: ApplicationFiled: May 13, 2003Publication date: November 20, 2003Applicant: Kabushiki Kaisha ToshibaInventors: Akira Kinno, Mitsushi Ikeda
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Patent number: 6559449Abstract: A planar X-ray detector including an X-ray-electric charge conversion film converting an incident X-ray into an electric charge, a pixel electrode contiguous to the X-ray-electric charge conversion film and arranged for every pixel, and a switching element connected to the pixel electrode. Also included is a signal line connected to the switching element, and a scanning line supplying a driving signal to the switching element. Further, the X-ray-electric charge conversion film contains phosphor particles, a photosensitive material, and a carrier transfer material.Type: GrantFiled: March 27, 2001Date of Patent: May 6, 2003Assignee: Kabushiki Kaisha ToshibaInventors: Mitsushi Ikeda, Masaki Atsuta, Katsuyuki Naito, Akira Kinno, Hitoshi Yagi, Manabu Tanaka
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Publication number: 20030063706Abstract: An X-ray flat panel detector includes an X-ray photosensitive film which generates signal charges upon being exposed to incident X-rays, pixel electrodes which are arrayed in contact with the X-ray photosensitive film, a bias voltage application unit which applies a bias voltage to the X-ray photosensitive film so as to make the pixel electrodes collect holes or electrons, which serve as the signal charges generated by the X-ray photosensitive film and have a higher mobility, capacitors which are arranged in correspondence with the pixel electrodes and store the charges generated by the X-ray photosensitive film, switching thin-film transistors which are arranged in correspondence with the pixel electrodes and read the charges in the capacitors, scanning lines which supply a control signal to OPEN/CLOSE-control the switching thin-film transistors, and signal lines which are connected to the switching thin-film transistors to read the charges when the switching thin-film transistors are opened.Type: ApplicationFiled: October 3, 2002Publication date: April 3, 2003Inventors: Mitsushi Ikeda, Kouhei Suzuki, Akira Kinno
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Patent number: 6507026Abstract: A planar X-ray detector has an X-ray charge conversion film converting an incident X-ray into electric charges, pixel electrodes provided on the X-ray charge conversion film corresponding to respective pixels arranged in an array, switching elements connected to the respective pixel electrodes, signal lines, each of which is connected to a column of switching elements, scanning lines, each of which transmits driving signals to a row of switching elements, and a common electrode provided on the surface of the X-ray charge conversion film opposite to the surface on which the pixel electrodes are provided. The X-ray charge conversion film contains an X-ray sensitive material made of inorganic-semiconductor particles, and a carrier transport material made of an organic semiconductor.Type: GrantFiled: January 10, 2001Date of Patent: January 14, 2003Assignee: Kabushiki Kaisha ToshibaInventors: Mitsushi Ikeda, Masaki Atsuta, Akira Kinno, Manabu Tanaka, Yasuhiro Sugawara
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Publication number: 20020093581Abstract: Signal output of an X-ray-electric conversion layer prevents instability of operation due to variation of a threshold voltage of TFT mounted to read a signal.Type: ApplicationFiled: November 13, 2001Publication date: July 18, 2002Applicant: Kabushiki Kaisha ToshibaInventors: Mitsushi Ikeda, Akira Kinno, Toshiyuki Oka
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Patent number: 6403965Abstract: An X-ray image detector system includes: a plurality of scanning lines; a plurality of signal lines formed so as to intersect the scanning lines; and a plurality of pixel parts, each of which is formed at a corresponding one of the intersections between the scanning lines and the signal lines so as to form an array; each of said pixel parts having an X-ray-to-charge converting part for converting an incident X-ray to an electric charge, a pixel electrode for receiving the electric charge from the X-ray-to-charge converting part, and a switching element which is operated on the basis of a signal of a corresponding one of the scanning lines, one end of the switching element being connected to the pixel electrode, and the other end of the switching element being connected to a corresponding one of the signal lines, wherein the X-ray-to-charge converting part includes at least a first X-ray-to-charge converting film, and a second X-ray-to-charge converting film having a lower resistivity than that of the first X-Type: GrantFiled: March 23, 2000Date of Patent: June 11, 2002Assignee: Kabushiki Kaisha ToshibaInventors: Mitsushi Ikeda, Masaki Atsuta, Akira Kinno, Kouhei Suzuki
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Publication number: 20020036267Abstract: Disclosed is a flat panel X-ray detector, comprising an X-ray-electric charge conversion film converting an incident X-ray into an electric charge, a pixel electrode contiguous to the X-ray-electric charge conversion film and arranged for every pixel, a switching element connected to the pixel electrode, a signal line connected to the switching element, and a scanning line supplying a driving signal to the switching element, wherein the X-ray-electric charge conversion film contains phosphor particles, a photosensitive material, and a carrier transfer material.Type: ApplicationFiled: March 27, 2001Publication date: March 28, 2002Inventors: Mitsushi Ikeda, Masaki Atsuta, Katsuyuki Naito, Akira Kinno, Hitoshi Yagi, Manabu Tanaka