Patents by Inventor Koichi Omata
Koichi Omata 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: 20230095423Abstract: A liquid ejection head substrate includes a base layer, a heating resistance element provided over the base layer to generate a heat energy for ejecting a liquid, a first insulation layer covering the heating resistance element, and a protective layer having, on the first insulation layer, a first region which overlaps the heating resistance element via the first insulation layer and a second region which does not overlap the heating resistance element and formed of a material including a metal which is eluted by an electrochemical reaction. The liquid ejection head substrate further includes a second insulation layer provided over a region overlying the base layer and not provided with the protective layer and over the second region of the protective layer.Type: ApplicationFiled: August 22, 2022Publication date: March 30, 2023Inventors: Takeru Yasuda, Koichi Omata, Yuzuru Ishida
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Patent number: 10889113Abstract: A recording element board has a plurality of heat-generating resistor elements arranged in a row and each of the plurality of heat-generating resistor elements comprises a heat-generating resistor layer and first and second pairs of electrodes connected to the heat-generating resistor layer. The first and second pairs of electrodes contact the heat-generating resistor layer at the opposite surfaces thereof to each other. The first pair of electrodes is formed as vias, while each surface of the second pair of electrodes is inclined so as to gradually reduce the thickness thereof toward the end thereof.Type: GrantFiled: July 8, 2019Date of Patent: January 12, 2021Assignee: Canon Kabushiki KaishaInventors: Ryoji Oohashi, Tsubasa Funabashi, Koichi Omata, Hideo Tamura, Kousuke Kubo, Yohei Osuki
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Patent number: 10889112Abstract: The liquid ejection head includes a plurality of element substrates including first and second element substrates and an electrical wiring substrate. The first and second element substrates each has a heating element array in which a plurality of heating elements producing heat energy for liquid ejection is arrayed, an electrically conductive protection layer covering the plurality of heating elements, an insulating layer arranged between the plurality of heating elements and the electrically conductive protection layer, and a connecting terminal for connecting to the outside. The electrical wiring substrate is electrically connected with the first and second element substrates via the connecting terminal.Type: GrantFiled: February 6, 2019Date of Patent: January 12, 2021Assignee: Canon Kabushiki KaishaInventors: Kousuke Kubo, Koichi Omata
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Publication number: 20200016896Abstract: A recording element board has a plurality of heat-generating resistor elements arranged in a row and each of the plurality of heat-generating resistor elements comprises a heat-generating resistor layer and first and second pairs of electrodes connected to the heat-generating resistor layer. The first and second pairs of electrodes contact the heat-generating resistor layer at the opposite surfaces thereof to each other. The first pair of electrodes is formed as vias, while each surface of the second pair of electrodes is inclined so as to gradually reduce the thickness thereof toward the end thereof.Type: ApplicationFiled: July 8, 2019Publication date: January 16, 2020Inventors: Ryoji Oohashi, Tsubasa Funabashi, Koichi Omata, Hideo Tamura, Kousuke Kubo, Yohei Osuki
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Patent number: 10500851Abstract: A print element substrate, comprises: a heater layer; a wiring layer that is connected to the heater layer and is for causing the heater layer to generate heat; an insulating layer arranged on the wiring layer; an anti-cavitation layer arranged on the insulating layer that is for protecting the insulating layer; and a switch that has a control terminal that is pulled-down to a ground, and causes the anti-cavitation layer and the ground to have an electrical connection when the control terminal is in a high-level state.Type: GrantFiled: August 31, 2017Date of Patent: December 10, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Yohei Osuki, Koichi Omata, Hideo Tamura, Takaaki Yamaguchi, Kousuke Kubo, Ryoji Oohashi, Yuji Tamaru, Toshio Negishi, Suguru Taniguchi
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Publication number: 20190255849Abstract: The liquid ejection head includes a plurality of element substrates including first and second element substrates and an electrical wiring substrate. The first and second element substrates each has a heating element array in which a plurality of heating elements producing heat energy for liquid ejection is arrayed, an electrically conductive protection layer covering the plurality of heating elements, an insulating layer arranged between the plurality of heating elements and the electrically conductive protection layer, and a connecting terminal for connecting to the outside. The electrical wiring substrate is electrically connected with the first and second element substrates via the connecting terminal.Type: ApplicationFiled: February 6, 2019Publication date: August 22, 2019Inventors: Kousuke Kubo, Koichi Omata
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Patent number: 9950525Abstract: An element substrate for a liquid ejecting head includes a substrate, an element forming layer on the substrate, and a discharge port forming member formed of an insulating member on the element forming layer. The element forming layer includes an energy generating element configured to provide energy to a liquid for ejection. The discharge port forming member includes a discharge port forming surface having discharge ports through which the liquid is ejected and an exterior side surface positioned between the discharge port forming surface and the element forming layer. The exterior side surface has a first edge facing the element forming layer. The element substrate further includes a conductive layer disposed between the first edge and the element forming layer and grounded.Type: GrantFiled: October 6, 2016Date of Patent: April 24, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Ryoji Oohashi, Koichi Omata, Hideo Tamura, Takaaki Yamaguchi, Kousuke Kubo, Suguru Taniguchi, Yuji Tamaru, Toshio Negishi, Yohei Osuki
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Publication number: 20180104954Abstract: A print element substrate, comprises: a heater layer; a wiring layer that is connected to the heater layer and is for causing the heater layer to generate heat; an insulating layer arranged on the wiring layer; an anti-cavitation layer arranged on the insulating layer that is for protecting the insulating layer; and a switch that has a control terminal that is pulled-down to a ground, and causes the anti-cavitation layer and the ground to have an electrical connection when the control terminal is in a high-level state.Type: ApplicationFiled: August 31, 2017Publication date: April 19, 2018Inventors: Yohei Osuki, Koichi Omata, Hideo Tamura, Takaaki Yamaguchi, Kousuke Kubo, Ryoji Oohashi, Yuji Tamaru, Toshio Negishi, Suguru Taniguchi
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Patent number: 9833992Abstract: A recording-element substrate includes a substrate including a base member, a pair of electrodes, a heating element formed of a thermal resistor layer between the electrodes, a surface on which an electroconductive film coating the heating element has been formed, and an insulating film between the heating element and the electroconductive film and a flow-path-forming member including walls forming a liquid flow path toward the heating element while being disposed on the substrate's surface side. The substrate includes an electric connecting portion in contact with the electroconductive film to connect the electroconductive film with the base member. The shortest distance between the electric connecting portion and a portion where an angle formed by the walls is 120 degrees or smaller when viewed from a direction orthogonal to the surface is smaller than that between a boundary between the electrodes and the heating element and the portion.Type: GrantFiled: December 16, 2016Date of Patent: December 5, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Suguru Taniguchi, Koichi Omata, Hideo Tamura, Takaaki Yamaguchi, Kousuke Kubo, Ryoji Oohashi, Yuji Tamaru, Toshio Negishi, Yohei Osuki
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Publication number: 20170173953Abstract: A recording-element substrate includes a substrate including a base member, a pair of electrodes, a heating element formed of a thermal resistor layer between the electrodes, a surface on which an electroconductive film coating the heating element has been formed, and an insulating film between the heating element and the electroconductive film and a flow-path-forming member including walls forming a liquid flow path toward the heating element while being disposed on the substrate's surface side. The substrate includes an electric connecting portion in contact with the electroconductive film to connect the electroconductive film with the base member. The shortest distance between the electric connecting portion and a portion where an angle formed by the walls is 120 degrees or smaller when viewed from a direction orthogonal to the surface is smaller than that between a boundary between the electrodes and the heating element and the portion.Type: ApplicationFiled: December 16, 2016Publication date: June 22, 2017Inventors: Suguru Taniguchi, Koichi Omata, Hideo Tamura, Takaaki Yamaguchi, Kousuke Kubo, Ryoji Oohashi, Yuji Tamaru, Toshio Negishi, Yohei Osuki
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Publication number: 20170100930Abstract: An element substrate for a liquid ejecting head includes a substrate, an element forming layer on the substrate, and a discharge port forming member formed of an insulating member on the element forming layer. The element forming layer includes an energy generating element configured to provide energy to a liquid for ejection. The discharge port forming member includes a discharge port forming surface having discharge ports through which the liquid is ejected and an exterior side surface positioned between the discharge port forming surface and the element forming layer. The exterior side surface has a first edge facing the element forming layer. The element substrate further includes a conductive layer disposed between the first edge and the element forming layer and grounded.Type: ApplicationFiled: October 6, 2016Publication date: April 13, 2017Inventors: Ryoji Oohashi, Koichi Omata, Hideo Tamura, Takaaki Yamaguchi, Kousuke Kubo, Suguru Taniguchi, Yuji Tamaru, Toshio Negishi, Yohei Osuki
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Patent number: 9242460Abstract: A method of manufacturing a liquid-discharge-head substrate is provided, which includes a plurality of elements for discharging liquid, and a heating member for heating the liquid-discharge-head substrate, the method including the steps of preparing a substrate having an insulating layer made of an insulating material provided on or above the substrate, providing a conductive layer made of a conductive material, and forming a conductive line being configured to supply current for driving the element and a part of a heating member by using the conductive layer.Type: GrantFiled: August 27, 2009Date of Patent: January 26, 2016Assignee: Canon Kabushiki KaishaInventors: Koichi Omata, Yoshiyuki Imanaka, Takaaki Yamaguchi, Yuuji Tamaru
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Patent number: 8943690Abstract: When protective portions are independently provided for each energy generation element, a leakage current inspection between the protective portions and the energy generation elements cannot be performed at once. Therefore, there is a concern that the inspection in manufacturing a substrate for liquid ejection head requires time. Therefore, the substrate for liquid ejection head is manufactured by performing a leakage current inspection between a connecting portion that is electrically connected to plurality of protective portions and a terminal to which the plurality of energy generation elements are connected, and thereafter removing the connecting portion.Type: GrantFiled: August 23, 2011Date of Patent: February 3, 2015Assignee: Canon Kabushiki KaishaInventors: Yuzuru Ishida, Takuya Hatsui, Kazuaki Shibata, Takeru Yasuda, Ryoji Oohashi, Yoshiyuki Imanaka, Koichi Omata, Hideo Tamura, Kousuke Kubo, Yuji Tamaru
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Patent number: 8876242Abstract: A print head is provided that well preserves ink characteristics upon printing by way of performing effective ink preliminary heating. The print head has heaters and ejection openings formed at locations corresponding to the heaters. Viewed from the side from which ink is ejected, a sub-heater is established in the print head between the ink supply port and the print elements so as to surround the ink supply port.Type: GrantFiled: April 20, 2010Date of Patent: November 4, 2014Assignee: Canon Kabushiki KaishaInventors: Yuuji Tamaru, Yoshiyuki Imanaka, Koichi Omata, Hideo Tamura, Takaaki Yamaguchi, Kousuke Kubo, Ryoji Oohashi, Toshio Negishi, Tatsuo Furukawa, Nobuyuki Hirayama, Ryo Kasai, Tomoko Kudo
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Patent number: 8733901Abstract: Performing a high-speed recording operation using a slender liquid discharge head substrate causes an uneven temperature distribution for each energy generating element because the center portion of the liquid discharge head substrate is more liable to accumulate heat than the end portion thereof, which may affect the quality of a recorded image. For this reason, the surface of the energy generating element which contacts liquid is separated into a first region and a second region in which a protection film is thicker than the one in the first region, and the area in the first region for the element positioned at the end portion of the array of the elements is made greater than that in the first region at the center portion thereof.Type: GrantFiled: March 8, 2011Date of Patent: May 27, 2014Assignee: Canon Kabushiki KaishaInventors: Hideo Tamura, Yoshiyuki Imanaka, Koichi Omata, Yuji Tamaru
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Patent number: 8708443Abstract: An element substrate capable of independently confirming an electrical connection status with a logic power source without increasing costs due to increasing the number of terminals or the like. The element substrate includes a connection status output circuit that outputs a signal in response to a connection status of a logic power source input terminal, or a connection status of input terminals of each of a print signal, a clock signal, a drive signal, and a latch signal, and a connection status output terminal that outputs an output signal from the connection status output circuit.Type: GrantFiled: August 18, 2011Date of Patent: April 29, 2014Assignee: Canon Kabushiki KaishaInventors: Kousuke Kubo, Yoshiyuki Imanaka, Koichi Omata, Souta Takeuchi, Takaaki Yamaguchi
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Patent number: 8534796Abstract: A liquid-discharging recording head includes first and second substrates each having an energy generating element and a supply port, and a support member on which the substrates are arranged. The first substrate is provided on one side in a longitudinal direction of the support member, and the second substrate is provided on an other side in the longitudinal direction of the support member. A driving circuit configured to drive the energy generating element is provided in a larger region between an end of a supply port in the first substrate on the other side in the longitudinal direction and an end of the first substrate on the other side and in a larger region between an end of a supply port in the second substrate on the one side in the longitudinal direction and an end of the second substrate on the one side.Type: GrantFiled: November 23, 2011Date of Patent: September 17, 2013Assignee: Canon Kabushiki KaishaInventors: Koichi Omata, Yoshiyuki Imanaka, Hideo Tamura, Takaaki Yamaguchi, Kousuke Kubo, Ryoji Oohashi, Yuuji Tamaru
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Patent number: 8523324Abstract: A liquid discharge head substrate includes an external terminal, a diode, a first conductive layer, a second conductive layer, and a third conductive layer. The external terminal is configured to connect to an external. The first conductive layer is connected to the external terminal for causing an input current to flow from the external terminal, and the diode includes an anode and a cathode. The second conductive layer is connected to the first conductive layer and one electrode of the anode and cathode, and causes a surge current generated when a surge voltage is applied from the external terminal, to flow from the first conductive layer to the one electrode. The third conductive layer is connected to the other electrode of the anode and the cathode and passes the surge current flowing from the one electrode to the other electrode.Type: GrantFiled: March 9, 2011Date of Patent: September 3, 2013Assignee: Canon Kabushiki KaishaInventors: Takaaki Yamaguchi, Yoshiyuki Imanaka, Koichi Omata, Toshio Negishi
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Patent number: 8439485Abstract: A liquid discharge head includes a heat accumulation layer provided on a board, an energy generation element configured to generate energy to discharge liquid from a discharge port and including a heat generation resistor layer provided on the heat accumulation layer and formed of a material configured to generate heat through supply of electricity and a pair of electrodes connected to the heat generation resistor layer, and an insulation layer including a silicon compound and provided so as to cover the energy generation element, and a line formed of a metal material provided between the heat accumulation layer and the insulation layer, and in at least a portion at a position closer to a flow path than the energy generation element.Type: GrantFiled: May 20, 2011Date of Patent: May 14, 2013Assignee: Canon Kabushiki KaishaInventors: Yuji Tamaru, Yoshiyuki Imanaka, Koichi Omata, Hideo Tamura, Kousuke Kubo, Ryoji Oohashi
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Patent number: 8246147Abstract: An inkjet printhead substrate includes: a heat generating element configured to generate energy for ejecting ink; an electric wire electrically connecting the heat generating element and an electrode lead provided on a flexible film wiring substrate; a protecting film configured to protect the electric wire; an electrode pad to which the electrode lead is connected, the electrode pad being formed by providing an opening in the protecting film at a position above the electric wire; a region to which a sealing resin configured to protect an electrically connected portion of the electrode pad and the electrode lead is to be applied; and an ink-detecting electrode composed of a metal wire and formed at the region to which the sealing resin is to be applied. The metal wire has a smaller width than an opening provided in the protecting film from which the metal wire is exposed.Type: GrantFiled: June 15, 2009Date of Patent: August 21, 2012Assignee: Canon Kabushiki KaishaInventors: Hideo Tamura, Yoshiyuki Imanaka, Koichi Omata, Takaaki Yamaguchi, Kousuke Kubo, Yuuji Tamaru, Ryoji Oohashi, Toshio Negishi, Kazuaki Shibata