Patents by Inventor Keiji Edamatsu
Keiji Edamatsu 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: 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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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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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
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Patent number: 8771792Abstract: Provided is a method for manufacturing a liquid discharge head, the liquid discharge head includes a substrate provided on a surface with a first energy generating part and a second energy generating part for generating energy utilized for discharging a liquid; a first discharge port provided corresponding to the first energy generating part so as to face the surface; a second discharge port provided corresponding to the second energy generating part so as to face the surface; a first wall member which has a wall of a first liquid flow path which communicates with the first discharge port; and a second wall member which has a wall of a second liquid flow path which communicates the second discharge port, wherein a distance between the second energy generating part and the second discharge port is greater than a distance between the first energy generating part and the first discharge port.Type: GrantFiled: January 25, 2011Date of Patent: July 8, 2014Assignee: Canon Kabushiki KaishaInventors: Kazuhiro Asai, Yoshinori Tagawa, Satoshi Ibe, Hiroyuki Murayama, Kouji Sasaki, Keiji Edamatsu
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Patent number: 8430476Abstract: A method for manufacturing a liquid discharge head provided with a substrate which has a layer made of silicon nitride and with a discharge port forming member which is disposed above the layer made of silicon nitride and has a discharge port for discharging liquid. The method includes providing a photosensitive layer that is to be the discharge port forming member above the layer made of silicon nitride, and forming the discharge port by exposing the photosensitive layer to i-line. The layer made of silicon nitride has a refractive index of 2.05 or more to light of a wavelength of 633 nm and irradiation with the i-line is performed in the exposure.Type: GrantFiled: April 26, 2012Date of Patent: April 30, 2013Assignee: Canon Kabushiki KaishaInventors: Jun Yamamuro, Masaki Ohsumi, Masahisa Watanabe, Keiji Edamatsu
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Patent number: 8338195Abstract: A method for manufacturing a liquid-ejection head having a plurality of nozzles arranged to eject liquid includes: preparing a substrate having a first layer, a second layer, and a third layer stacked in this order, the second layer more resistant than the third layer to etching by an etching method to be used on the third layer; partially etching the third layer by the etching method to expose the second layer; and removing the exposed second layer at least in part to expose some area on the top surface of the first layer, opening a first one of the nozzles down from the exposed area of the top surface, and opening a second one of the nozzles down from the top surface of the third layer.Type: GrantFiled: July 26, 2011Date of Patent: December 25, 2012Assignee: Canon Kabushiki KaishaInventors: Koji Sasaki, Kazuhiro Asai, Keiji Edamatsu, Yoshinori Tagawa
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Patent number: 8286351Abstract: There is disclosed a manufacturing method of a liquid discharge head including a substrate in which a first energy generating element and a second energy generating element that generate energy used for discharging liquid are provided, a discharge port member in which a first discharge port discharging the liquid is provided corresponding to the first energy generating element and a second discharge port discharging the liquid is provided corresponding to the second energy generating element, and a flow path wall member having a portion of the liquid flow path wall that communicates with the first discharge port and the second discharge port, in which a distance between the second energy generating element and the second discharge port is larger than that between the first energy generating element and the first discharge port.Type: GrantFiled: January 3, 2011Date of Patent: October 16, 2012Assignee: Canon Kabushiki KaishaInventors: Keiji Edamatsu, Yoshinori Tagawa, Kazuhiro Asai, Satoshi Ibe, Hiroto Komiyama, Toshiaki Kurosu, Masataka Nagai
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Publication number: 20120206535Abstract: A method for manufacturing a liquid discharge head provided with a substrate which has a layer made of silicon nitride and with a discharge port forming member which is disposed above the layer made of silicon nitride and has a discharge port for discharging liquid. The method includes providing a photosensitive layer that is to be the discharge port forming member above the layer made of silicon nitride, and forming the discharge port by exposing the photosensitive layer to i-line. The layer made of silicon nitride has a refractive index of 2.05 or more to light of a wavelength of 633 nm and irradiation with the i-line is performed in the exposure.Type: ApplicationFiled: April 26, 2012Publication date: August 16, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Jun Yamamuro, Masaki Ohsumi, Masahisa Watanabe, Keiji Edamatsu
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Patent number: 8187898Abstract: A method for manufacturing a liquid discharge head provided with a substrate which has a layer made of silicon nitride and with a discharge port forming member which is disposed above the layer made of silicon nitride and has a discharge port for discharging liquid. The method includes providing a photosensitive layer that is to be the discharge port forming member above the layer made of silicon nitride, and forming the discharge port by exposing the photosensitive layer to i-line. The layer made of silicon nitride has a refractive index of 2.05 or more to light of a wavelength of 633 nm and irradiation with the i-line is performed in the exposure.Type: GrantFiled: December 19, 2008Date of Patent: May 29, 2012Assignee: Canon Kabushiki KaishaInventors: Jun Yamamuro, Masaki Ohsumi, Masahisa Watanabe, Keiji Edamatsu
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Publication number: 20120028384Abstract: A method for manufacturing a liquid-ejection head having a plurality of nozzles arranged to eject liquid includes: preparing a substrate having a first layer, a second layer, and a third layer stacked in this order, the second layer more resistant than the third layer to etching by an etching method to be used on the third layer; partially etching the third layer by the etching method to expose the second layer; and removing the exposed second layer at least in part to expose some area on the top surface of the first layer, opening a first one of the nozzles down from the exposed area of the top surface, and opening a second one of the nozzles down from the top surface of the third layer.Type: ApplicationFiled: July 26, 2011Publication date: February 2, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Kouji Sasaki, Kazuhiro Asai, Keiji Edamatsu, Yoshinori Tagawa
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Publication number: 20110195192Abstract: Provided is a method for manufacturing a liquid discharge head, the liquid discharge head includes a substrate provided on a surface with a first energy generating part and a second energy generating part for generating energy utilized for discharging a liquid; a first discharge port provided corresponding to the first energy generating part so as to face the surface; a second discharge port provided corresponding to the second energy generating part so as to face the surface; a first wall member which has a wall of a first liquid flow path which communicates with the first discharge port; and a second wall member which has a wall of a second liquid flow path which communicates the second discharge port, wherein a distance between the second energy generating part and the second discharge port is greater than a distance between the first energy generating part and the first discharge port.Type: ApplicationFiled: January 25, 2011Publication date: August 11, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Kazuhiro Asai, Yoshinori Tagawa, Satoshi Ibe, Hiroyuki Murayama, Kouji Sasaki, Keiji Edamatsu
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Publication number: 20110167636Abstract: There is disclosed a manufacturing method of a liquid discharge head including a substrate in which a first energy generating element and a second energy generating element that generate energy used for discharging liquid are provided, a discharge port member in which a first discharge port discharging the liquid is provided corresponding to the first energy generating element and a second discharge port discharging the liquid is provided corresponding to the second energy generating element, and a flow path wall member having a portion of the liquid flow path wall that communicates with the first discharge port and the second discharge port, in which a distance between the second energy generating element and the second discharge port is larger than that between the first energy generating element and the first discharge port.Type: ApplicationFiled: January 3, 2011Publication date: July 14, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Keiji Edamatsu, Yoshinori Tagawa, Kazuhiro Asai, Satoshi Ibe, Hiroto Komiyama, Toshiaki Kurosu, Masataka Nagai