Patents by Inventor Shinya Iwahashi
Shinya Iwahashi 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: 20220314619Abstract: A substrate includes a layer including a base material and an intermediate layer including a wiring layer, an element formed on a side of the intermediate layer, and configured to generate energy for discharging a liquid, an insulating layer covering the element and the layer against a liquid chamber, and a conductive layer formed on the insulating layer so as to cover the element against the liquid chamber. The substrate further includes an electric connecting portion configured to electrically connect the wiring layer and the element, a non-insulated portion formed on a side of the intermediate layer and configured to be covered by the insulating layer against the liquid chamber, and an opening portion formed in the insulating layer at a position. The non-insulated portion is connected to the conductive layer via the opening portion.Type: ApplicationFiled: March 30, 2022Publication date: October 6, 2022Inventors: Shinya Iwahashi, Takeru Yasuda, Yuzuru Ishida
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Patent number: 10882314Abstract: A liquid ejection head and its manufacturing method are capable of reducing the thickness of a protective layer as compared to the traditional technique so as to efficiently transfer the heat energy generated by a heating resistance element to a droplet of liquid such as ink. To achieve this, power supply wirings are provided in the same layer below the heating resistance element.Type: GrantFiled: October 16, 2019Date of Patent: January 5, 2021Assignee: Canon Kabushiki KaishaInventors: Mineo Shimotsusa, Shinya Iwahashi, Sadayoshi Sakuma, Ichiro Saito
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Patent number: 10766255Abstract: Provided is an element substrate with suppressed variations in resistance though having a high resistance. In an element substrate equipped with a heat generating resistor that generates thermal energy for ejecting a liquid, the heat generating resistor is a stacked structure having stacked a plurality of resistor layers including a first resistor layer and a second resistor layer containing a metal silicon nitride and the first resistor layer and the second resistor layer are different from each other in at least one of a silicon content in the metal silicon oxide and a metal element contained in the metal silicon nitride.Type: GrantFiled: March 29, 2019Date of Patent: September 8, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Shinya Iwahashi, Mineo Shimotsusa, Sadayoshi Sakuma
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Publication number: 20200122459Abstract: A liquid ejection head capable of reducing the thickness of the protective layer as compared to the traditional technique and efficiently transferring the heat energy generated by the heating resistance element to a droplet such as ink and a method of manufacturing the liquid ejection head provide. To achieve this, a power supply wiring are provided in the same layer below the heating resistance element.Type: ApplicationFiled: October 16, 2019Publication date: April 23, 2020Inventors: Mineo Shimotsusa, Shinya Iwahashi, Sadayoshi Sakuma, Ichiro Saito
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Publication number: 20190308415Abstract: Provided is an element substrate with suppressed variations in resistance though having a high resistance. In an element substrate equipped with a heat generating resistor that generates thermal energy for ejecting a liquid, the heat generating resistor is a stacked structure having stacked a plurality of resistor layers including a first resistor layer and a second resistor layer containing a metal silicon nitride and the first resistor layer and the second resistor layer are different from each other in at least one of a silicon content in the metal silicon oxide and a metal element contained in the metal silicon nitride.Type: ApplicationFiled: March 29, 2019Publication date: October 10, 2019Inventors: Shinya Iwahashi, Mineo Shimotsusa, Sadayoshi Sakuma
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Patent number: 9975338Abstract: A method for manufacturing a liquid ejection head substrate, in which a heat storage layer, a pair of electrodes extending from the surface of the heat storage layer toward the back surface, a heat-generating resistor layer in contact with the pair of electrodes and the surface of the heat storage layer, and a first cover layer configured to cover the heat-generating resistor layer are stacked, includes the steps of etching the heat-generating resistor layer and the first cover layer by using a mask disposed on a substrate including the heat-generating resistor layer and the first cover layer, removing the mask, and forming a second cover layer configured to cover an end portion of the heat-generating resistor layer in that order.Type: GrantFiled: July 22, 2016Date of Patent: May 22, 2018Assignee: Canon Kabushiki KaishaInventors: Takuya Hatsui, Shuichi Tamatsukuri, Souta Takeuchi, Kenji Takahashi, Soichiro Nagamochi, Shinya Iwahashi
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Patent number: 9751301Abstract: Even if electrostatic discharge occurs, dielectric breakdown of an insulating layer for covering an element on a base substrate is inhibited. A substrate for an ink jet recording head includes: a base substrate including an element configured to apply energy for ejecting ink to ink and an insulating protective layer for covering the element; an ejection orifice forming member including an insulating first member for forming an ink flow path for supplying ink to the element and a second member including an ejection orifice surface having ejection orifices provided therein; and a columnar conductive member extending between the second member and the base substrate in a direction intersecting the ejection orifice surface.Type: GrantFiled: April 25, 2016Date of Patent: September 5, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Kenji Takahashi, Shinya Iwahashi, Soichiro Nagamochi, Souta Takeuchi, Takuya Hatsui, Shuichi Tamatsukuri
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Patent number: 9561651Abstract: An element substrate including a base having a heat-generating resistor element which generates thermal energy used for discharging a liquid; an electrically conductive protective layer covering the heat-generating resistor element; an insulating layer provided between the heat-generating resistor element and the protective layer; and a potential applying unit for applying a potential to the protective layer such that a potential of the protective layer is lower than a potential at one end of the heat-generating resistor element and higher than a potential at the other end of the heat-generating resistor element with a voltage being applied between the one end and the other end of the heat-generating resistor element.Type: GrantFiled: February 23, 2016Date of Patent: February 7, 2017Assignee: Canon Kabushiki KaishaInventors: Takuya Hatsui, Souta Takeuchi, Kenji Takahashi, Soichiro Nagamochi, Shinya Iwahashi
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Publication number: 20170021623Abstract: A method for manufacturing a liquid ejection head substrate, in which a heat storage layer, a pair of electrodes extending from the surface of the heat storage layer toward the back surface, a heat-generating resistor layer in contact with the pair of electrodes and the surface of the heat storage layer, and a first cover layer configured to cover the heat-generating resistor layer are stacked, includes the steps of etching the heat-generating resistor layer and the first cover layer by using a mask disposed on a substrate including the heat-generating resistor layer and the first cover layer, removing the mask, and forming a second cover layer configured to cover an end portion of the heat-generating resistor layer in that order.Type: ApplicationFiled: July 22, 2016Publication date: January 26, 2017Inventors: Takuya Hatsui, Shuichi Tamatsukuri, Souta Takeuchi, Kenji Takahashi, Soichiro Nagamochi, Shinya Iwahashi
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Publication number: 20160325544Abstract: Even if electrostatic discharge occurs, dielectric breakdown of an insulating layer for covering an element on a base substrate is inhibited. A substrate for an ink jet recording head includes: a base substrate including an element configured to apply energy for ejecting ink to ink and an insulating protective layer for covering the element; an ejection orifice forming member including an insulating first member for forming an ink flow path for supplying ink to the element and a second member including an ejection orifice surface having ejection orifices provided therein; and a columnar conductive member extending between the second member and the base substrate in a direction intersecting the ejection orifice surface.Type: ApplicationFiled: April 25, 2016Publication date: November 10, 2016Inventors: Kenji Takahashi, Shinya Iwahashi, Soichiro Nagamochi, Souta Takeuchi, Takuya Hatsui, Shuichi Tamatsukuri
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Publication number: 20160263888Abstract: An element substrate including a base having a heat-generating resistor element which generates thermal energy used for discharging a liquid; an electrically conductive protective layer covering the heat-generating resistor element; an insulating layer provided between the heat-generating resistor element and the protective layer; and a potential applying unit for applying a potential to the protective layer such that a potential of the protective layer is lower than a potential at one end of the heat-generating resistor element and higher than a potential at the other end of the heat-generating resistor element with a voltage being applied between the one end and the other end of the heat-generating resistor element.Type: ApplicationFiled: February 23, 2016Publication date: September 15, 2016Inventors: Takuya Hatsui, Souta Takeuchi, Kenji Takahashi, Soichiro Nagamochi, Shinya Iwahashi