Patents by Inventor Tomohiko Nakano
Tomohiko Nakano 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: 11413871Abstract: In a method of manufacturing a liquid ejection head including transferring a dry film for forming a partial structure of a liquid ejection head from a support to a substrate, the dry film with the support is bonded on a processing surface of the substrate with forming a projection part in which peripheral edges of the dry film and the support protrude further outside than a peripheral edge of the processing surface; the projection part is cut at a cutting position between an outer edge of the projection part and the peripheral edge of the processing surface to form a remaining projection part, and the support is peeled from the substrate with the remaining projection part as a start position to leave the dry film on the processing surface which forms the partial structure of the liquid ejection head.Type: GrantFiled: September 23, 2019Date of Patent: August 16, 2022Assignee: CANON KABUSHIKI KAISHAInventor: Tomohiko Nakano
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Patent number: 11155083Abstract: A member transfer method includes sticking a member supported at a support to an object, thinning the support after the sticking of the member to the object, and removing the support from the member after the thinning of the support.Type: GrantFiled: July 15, 2019Date of Patent: October 26, 2021Assignee: Canon Kabushiki KaishaInventors: Teruo Ozaki, Masaki Ohsumi, Tomohiko Nakano, Seiichiro Yaginuma, Keiji Matsumoto
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Patent number: 10744771Abstract: To manufacture a liquid ejection head, a film having a lower surface free energy than a surface free energy of a substrate is first formed on an inner face of a liquid supply port. Next, a dry film to be a flow path forming member is attached to cover the surface of the substrate, and then a member to be an ejection orifice forming member is provided on the surface of the dry film.Type: GrantFiled: August 30, 2018Date of Patent: August 18, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Keiji Matsumoto, Seiichiro Yaginuma, Koji Sasaki, Jun Yamamuro, Kunihito Uohashi, Ryotaro Murakami, Tomohiko Nakano, Shingo Nagata
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Publication number: 20200094557Abstract: In a method of manufacturing a liquid ejection head including transferring a dry film for forming a partial structure of a liquid ejection head from a support to a substrate, the dry film with the support is bonded on a processing surface of the substrate with forming a projection part in which peripheral edges of the dry film and the support protrude further outside than a peripheral edge of the processing surface; the projection part is cut at a cutting position between an outer edge of the projection part and the peripheral edge of the processing surface to form a remaining projection part, and the support is peeled from the substrate with the remaining projection part as a start position to leave the dry film on the processing surface which forms the partial structure of the liquid ejection head.Type: ApplicationFiled: September 23, 2019Publication date: March 26, 2020Inventor: Tomohiko Nakano
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Publication number: 20200023640Abstract: A member transfer method includes sticking a member supported at a support to an object, thinning the support after the sticking of the member to the object, and removing the support from the member after the thinning of the support.Type: ApplicationFiled: July 15, 2019Publication date: January 23, 2020Inventors: Teruo Ozaki, Masaki Ohsumi, Tomohiko Nakano, Seiichiro Yaginuma, Keiji Matsumoto
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Patent number: 10500861Abstract: A method for manufacturing a liquid ejection head including providing a negative first photosensitive resin layer on the substrate, forming a pattern of the flow path by selectively exposing the first photosensitive resin layer, providing a negative second photosensitive resin layer on the first photosensitive resin layer, providing a negative third photosensitive resin layer on the second photosensitive resin layer, forming a pattern of the ejection port by selectively exposing the second and third photosensitive resin layers, developing the first, second, and third photosensitive resin layers, irradiating an activation energy line on at least the third photosensitive resin layer after the developing, and heat curing the first, second, and third photosensitive resin layers after the irradiating of the activation energy line.Type: GrantFiled: August 4, 2017Date of Patent: December 10, 2019Assignee: Canon Kabushiki KaishaInventors: Kunihito Uohashi, Shingo Nagata, Kenji Fujii, Jun Yamamuro, Koji Sasaki, Keiji Matsumoto, Seiichiro Yaginuma, Ryotaro Murakami, Tomohiko Nakano, Masataka Nagai
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Publication number: 20190255852Abstract: Provided is a manufacturing method of a liquid ejection head including the following in an order listed: (1) providing a negative, photosensitive first resin layer on a first surface of a substrate, (2) forming a latent image of a pattern of a liquid flow path by exposure on the first resin layer, (3) providing a negative, photosensitive second resin layer on the first resin layer, (4) forming a latent image of a pattern of the liquid ejection orifice by exposure on the second resin layer, (5) heating the first and second resin layers at a certain temperature to obtain a certain Vickers hardness of a non-latent image portion of the second resin layer, and (6) heating the first and second resin layers at a temperature more than or equal to the softening temperature of the first resin layer.Type: ApplicationFiled: February 5, 2019Publication date: August 22, 2019Inventors: Tomohiko Nakano, Keiji Watanabe, Koji Sasaki
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Patent number: 10343406Abstract: A liquid ejection head has an ejection port forming region which includes liquid ejection energy generating elements arranged on a substrate, liquid supply ports each running through the substrate and having an opening at a surface of the substrate, a liquid path formed on the surface as a space containing the liquid ejection energy generating elements and the liquid supply ports therein, and ejection ports corresponding to the respective liquid ejection energy generating elements. The liquid ejection head is manufactured by forming a liquid path forming layer on the substrate using a dry film resist, forming an ejection port forming layer on the liquid path forming layer, forming a liquid path in the liquid path forming layer and ejection ports in the ejection port forming layer. The substrate has dummy holes each having an opening at a surface of the substrate outside the ejection port forming region.Type: GrantFiled: December 27, 2016Date of Patent: July 9, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Keiji Matsumoto, Jun Yamamuro, Kazuhiro Asai, Koji Sasaki, Kunihito Uohashi, Seiichiro Yaginuma, Ryotaro Murakami, Masahisa Watanabe, Tomohiko Nakano, Keiji Edamatsu, Haruka Nakada, Kenji Fujii
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Patent number: 10322584Abstract: A method for manufacturing a liquid ejection head including the steps of preparing a substrate including, on a surface of the substrate, a layer having a plurality of openings in which opening portions of supply portions are located and which are arrayed in an array direction and another opening which is different from the plurality of openings and is located beyond the array end portion in the array direction, and attaching a dry film for forming flow passages to the substrate and the layer.Type: GrantFiled: April 17, 2017Date of Patent: June 18, 2019Assignee: Canon Kabushiki KaishaInventors: Jun Yamamuro, Kenji Fujii, Kazuhiro Asai, Keiji Matsumoto, Koji Sasaki, Kunihito Uohashi, Seiichiro Yaginuma, Masahisa Watanabe, Ryotaro Murakami, Tomohiko Nakano, Keiji Edamatsu, Haruka Nakada
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Patent number: 10286668Abstract: A liquid ejection head has an ejection port forming region which includes liquid ejection energy generating elements arranged on a substrate, liquid supply ports each running through the substrate and having an opening at a surface of the substrate, a liquid path formed on the surface as a space containing the liquid ejection energy generating elements and the liquid supply ports therein, and ejection ports corresponding to the respective liquid ejection energy generating elements. The liquid ejection head is manufactured by forming a liquid path forming layer on the substrate using a dry film resist, forming an ejection port forming layer on the liquid path forming layer, forming a liquid path in the liquid path forming layer and ejection ports in the ejection port forming layer. The substrate has dummy holes each having an opening at a surface of the substrate outside the ejection port forming region.Type: GrantFiled: December 27, 2016Date of Patent: May 14, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Keiji Matsumoto, Jun Yamamuro, Kazuhiro Asai, Koji Sasaki, Kunihito Uohashi, Seiichiro Yaginuma, Ryotaro Murakami, Masahisa Watanabe, Tomohiko Nakano, Keiji Edamatsu, Haruka Nakada, Kenji Fujii
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Publication number: 20190070854Abstract: To manufacture a liquid ejection head, a film having a lower surface free energy than a surface free energy of a substrate is first formed on an inner face of a liquid supply port. Next, a dry film to be a flow path forming member is attached to cover the surface of the substrate, and then a member to be an ejection orifice forming member is provided on the surface of the dry film.Type: ApplicationFiled: August 30, 2018Publication date: March 7, 2019Inventors: Keiji Matsumoto, Seiichiro Yaginuma, Koji Sasaki, Jun Yamamuro, Kunihito Uohashi, Ryotaro Murakami, Tomohiko Nakano, Shingo Nagata
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Patent number: 9994018Abstract: A liquid ejection head includes a liquid ejection board and a liquid ejection head component disposed on the liquid ejection board. The liquid ejection board includes a substrate, an energy generating device on the substrate, a channel defining member defining a liquid channel and having a liquid ejection opening in communication with the liquid channel, a liquid supply passage in communication with the liquid channel, a liquid supply opening in communication with the liquid supply passage and having a smaller opening cross-sectional area taken in a direction perpendicular to a flow direction of a liquid than the liquid supply passage, and an opening in communication with the liquid channel. The liquid channel allows a liquid to be in contact with the energy generating device. The liquid ejection opening allows a liquid to be ejected therethrough. The liquid ejection head component closes at least a portion of the opening.Type: GrantFiled: July 25, 2016Date of Patent: June 12, 2018Assignee: Canon Kabushiki KaishaInventors: Seiichiro Yaginuma, Jun Yamamuro, Kazuhiro Asai, Keiji Matsumoto, Koji Sasaki, Masahisa Watanabe, Kunihito Uohashi, Ryotaro Murakami, Tomohiko Nakano, Keiji Edamatsu, Haruka Nakada, Kenji Fujii
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Publication number: 20180043689Abstract: A method for manufacturing a liquid ejection head including providing a negative first photosensitive resin layer on the substrate, forming a pattern of the flow path by selectively exposing the first photosensitive resin layer, providing a negative second photosensitive resin layer on the first photosensitive resin layer, providing a negative third photosensitive resin layer on the second photosensitive resin layer, forming a pattern of the ejection port by selectively exposing the second and third photosensitive resin layers, developing the first, second, and third photosensitive resin layers, irradiating an activation energy line on at least the third photosensitive resin layer after the developing, and heat curing the first, second, and third photosensitive resin layers after the irradiating of the activation energy line.Type: ApplicationFiled: August 4, 2017Publication date: February 15, 2018Inventors: Kunihito Uohashi, Shingo Nagata, Kenji Fujii, Jun Yamamuro, Koji Sasaki, Keiji Matsumoto, Seiichiro Yaginuma, Ryotaro Murakami, Tomohiko Nakano, Masataka Nagai
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Patent number: 9873255Abstract: A liquid ejection head includes a substrate having an energy generating element arranged therein and an ejection port forming member laid as superposed above the substrate. At least one ejection port is formed so as to run through the ejection port forming member. The ejection port forming member has a concave portion including the ejection port formed therein on the surface thereof opposite to the surface thereof facing the substrate, and has a convex portion on the surface of the ejection port forming member facing the substrate so as to correspond to the concave portion.Type: GrantFiled: March 24, 2016Date of Patent: January 23, 2018Assignee: Canon Kabushiki KaishaInventors: Koji Sasaki, Kenji Fujii, Jun Yamamuro, Kazuhiro Asai, Seiichiro Yaginuma, Keiji Matsumoto, Kunihito Uohashi, Masahisa Watanabe, Tomohiko Nakano, Keiji Edamatsu, Haruka Nakada
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Publication number: 20170297336Abstract: A method for manufacturing a liquid ejection head including the steps of preparing a substrate including, on a surface of the substrate, a layer having a plurality of openings in which opening portions of supply portions are located and which are arrayed in an array direction and another opening which is different from the plurality of openings and is located beyond the array end portion in the array direction, and attaching a dry film for forming flow passages to the substrate and the layer.Type: ApplicationFiled: April 17, 2017Publication date: October 19, 2017Inventors: Jun Yamamuro, Kenji Fujii, Kazuhiro Asai, Keiji Matsumoto, Koji Sasaki, Kunihito Uohashi, Seiichiro Yaginuma, Masahisa Watanabe, Ryotaro Murakami, Tomohiko Nakano, Keiji Edamatsu, Haruka Nakada
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Patent number: 9789690Abstract: A method for manufacturing a liquid ejection head includes the steps of: preparing a substrate including an energy-generating element disposed on a first surface of the substrate and a supply path for liquid; disposing a dry film on the first surface of the substrate in such a manner that the dry film partially enters the supply path; etching the dry film from a side of the dry film facing the first surface of the substrate so that the dry film has an etched surface substantially in parallel with the first surface and covers the supply path; forming a resin layer to be a flow path member on the dry film covering the supply path; and removing the dry film covering the supply path.Type: GrantFiled: May 25, 2016Date of Patent: October 17, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Masahisa Watanabe, Jun Yamamuro, Kazuhiro Asai, Keiji Matsumoto, Koji Sasaki, Kunihito Uohashi, Ryotaro Murakami, Tomohiko Nakano, Keiji Edamatsu, Haruka Nakada, Kenji Fujii, Seiichiro Yaginuma
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Publication number: 20170203569Abstract: A liquid ejection head has an ejection port forming region which includes liquid ejection energy generating elements arranged on a substrate, liquid supply ports each running through the substrate and having an opening at a surface of the substrate, a liquid path formed on the surface as a space containing the liquid ejection energy generating elements and the liquid supply ports therein, and ejection ports corresponding to the respective liquid ejection energy generating elements. The liquid ejection head is manufactured by forming a liquid path forming layer on the substrate using a dry film resist, forming an ejection port forming layer on the liquid path forming layer, forming a liquid path in the liquid path forming layer and ejection ports in the ejection port forming layer. The substrate has dummy holes each having an opening at a surface of the substrate outside the ejection port forming region.Type: ApplicationFiled: December 27, 2016Publication date: July 20, 2017Inventors: Keiji Matsumoto, Jun Yamamuro, Kazuhiro Asai, Koji Sasaki, Kunihito Uohashi, Seiichiro Yaginuma, Ryotaro Murakami, Masahisa Watanabe, Tomohiko Nakano, Keiji Edamatsu, Haruka Nakada, Kenji Fujii
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Publication number: 20170028730Abstract: A liquid ejection head includes a liquid ejection board and a liquid ejection head component disposed on the liquid ejection board. The liquid ejection board includes a substrate, an energy generating device on the substrate, a channel defining member defining a liquid channel and having a liquid ejection opening in communication with the liquid channel, a liquid supply passage in communication with the liquid channel, a liquid supply opening in communication with the liquid supply passage and having a smaller opening cross-sectional area taken in a direction perpendicular to a flow direction of a liquid than the liquid supply passage, and an opening in communication with the liquid channel. The liquid channel allows a liquid to be in contact with the energy generating device. The liquid ejection opening allows a liquid to be ejected therethrough. The liquid ejection head component closes at least a portion of the opening.Type: ApplicationFiled: July 25, 2016Publication date: February 2, 2017Inventors: Seiichiro Yaginuma, Jun Yamamuro, Kazuhiro Asai, Keiji Matsumoto, Koji Sasaki, Masahisa Watanabe, Kunihito Uohashi, Ryotaro Murakami, Tomohiko Nakano, Keiji Edamatsu, Haruka Nakada, Kenji Fujii
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Publication number: 20160347065Abstract: A method for manufacturing a liquid ejection head includes the steps of: preparing a substrate including an energy-generating element disposed on a first surface of the substrate and a supply path for liquid; disposing a dry film on the first surface of the substrate in such a manner that the dry film partially enters the supply path; etching the dry film from a side of the dry film facing the first surface of the substrate so that the dry film has an etched surface substantially in parallel with the first surface and covers the supply path; forming a resin layer to be a flow path member on the dry film covering the supply path; and removing the dry film covering the supply path.Type: ApplicationFiled: May 25, 2016Publication date: December 1, 2016Inventors: Masahisa Watanabe, Jun Yamamuro, Kazuhiro Asai, Keiji Matsumoto, Koji Sasaki, Kunihito Uohashi, Ryotaro Murakami, Tomohiko Nakano, Keiji Edamatsu, Haruka Nakada, Kenji Fujii, Seiichiro Yaginuma
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Publication number: 20160311222Abstract: A liquid ejection head includes a substrate having an energy generating element arranged therein and an ejection port forming member laid as superposed above the substrate. At least one ejection port is formed so as to run through the ejection port forming member. The ejection port forming member has a concave portion including the ejection port formed therein on the surface thereof opposite to the surface thereof facing the substrate, and has a convex portion on the surface of the ejection port forming member facing the substrate so as to correspond to the concave portion.Type: ApplicationFiled: March 24, 2016Publication date: October 27, 2016Inventors: Koji Sasaki, Kenji Fujii, Jun Yamamuro, Kazuhiro Asai, Seiichiro Yaginuma, Keiji Matsumoto, Kunihito Uohashi, Masahisa Watanabe, Tomohiko Nakano, Keiji Edamatsu, Haruka Nakada