Patents by Inventor Kazuhiro Asai
Kazuhiro Asai 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: 8133662Abstract: A method for manufacturing a liquid discharge head that includes a flow path wall member which forms a wall of a flow path communicating with a discharge port for discharging a liquid and a substrate which forms the flow path in contact with the flow path wall member includes providing a first layer, which is made of a photosensitive resin on the substrate, for forming a pattern having a shape of the flow path, providing a second layer which is capable of absorbing light within a photosensitive wavelength range of the photosensitive resin and has a shape corresponding to the shape of the flow path, on the first layer so as to come into contact with the first layer, performing patterning of the first layer which includes exposure of the first layer with the light using the second layer as a mask, and forming the pattern from the first layer, providing a cover layer which is made of a photosensitive resin and serves as the flow path wall member so as to cover the second layer and the pattern, forming the dischaType: GrantFiled: March 10, 2010Date of Patent: March 13, 2012Assignee: Canon Kabushiki KaishaInventors: Makoto Watanabe, Yoshinori Tagawa, Satoshi Ibe, Kazuhiro Asai, Masaki Ohsumi, Masataka Nagai
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Publication number: 20120044294Abstract: A liquid ejection head includes a member having ejection ports and dummy ejection ports. The ejection ports are provided in correspondence with energy-generating elements used in ejecting liquid. The dummy ejection ports are provided in correspondence with a light-receiving element outputting current whose level changes in accordance with the intensity of light applied thereto. By detecting the level of current that is output from the light-receiving element, the shapes of the ejection ports are estimated.Type: ApplicationFiled: August 16, 2011Publication date: February 23, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Masataka Nagai, Yoshinori Tagawa, Satoshi Ibe, Kazuhiro Asai, Hiroyuki Murayama, Mitsuru Chida
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Patent number: 8114305Abstract: A method of manufacturing a silicon substrate for a liquid discharge head with a liquid supply opening formed therein includes: forming one processed portion by laser processing on the substrate from one surface of the substrate; expanding the one processed portion to form a recess portion by performing laser processing at a position which overlaps a part of the one processed portion and does not overlap another part of the one processed portion; and etching from the one surface the substrate with the recess portion formed therein to form the liquid supply opening.Type: GrantFiled: September 3, 2008Date of Patent: February 14, 2012Assignee: Canon Kabushiki KaishaInventors: Hiroto Komiyama, Hirokazu Komuro, Satoshi Ibe, Takuya Hatsui, Keisuke Kishimoto, Kazuhiro Asai, Shimpei Otaka
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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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Patent number: 8091234Abstract: A manufacturing method, for a liquid discharge head that includes a silicon substrate in which a supply port is formed for supplying a liquid, includes the steps of providing the silicon substrate, a mask layer provided with an opening that corresponds to the supply port being provided on one face of the silicon substrate; forming a groove in the silicon substrate along the shape of the opening in the mask layer; removing, via sandblasting, silicon of the silicon substrate inward of the groove in the silicon substrate; and performing, from the one face, anisotropic etching of the silicon substrate that has been sandblasted, and forming the supply port.Type: GrantFiled: September 3, 2008Date of Patent: January 10, 2012Assignee: Canon Kabushiki KaishaInventors: Satoshi Ibe, Hirokazu Komuro, Takuya Hatsui, Kazuhiro Asai, Shimpei Otaka, Hiroto Komiyama, Keisuke Kishimoto
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Patent number: 8017307Abstract: A method for manufacturing a minute structure comprises a step of forming an ionizing radiation decomposing type positive type resist layer including a methyl isopropenyl ketone as a first positive type photosensitive material layer, a step of forming an ionizing radiation decomposing type positive type resist layer including a photosensitive material of a copolymer as a second positive type photosensitive material layer to be sensitized by an ionizing radiation of a second wavelength range on the first positive type photosensitive material layer, a step of forming a desired pattern in the above-mentioned second positive type photosensitive material layer, and development using a developing solution, and then, a step of forming a desired pattern in the above-mentioned first positive type photosensitive material layer to form a convex shape pattern.Type: GrantFiled: June 27, 2005Date of Patent: September 13, 2011Assignee: Canon Kabushiki KaishaInventors: Masahiko Kubota, Takumi Suzuki, Tamaki Sato, Ryoji Kanri, Maki Hatta, Kazuhiro Asai, Shoji Shiba, Hiroe Ishikura, Akihiko Okano
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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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Patent number: 7980675Abstract: An ink jet head includes a substrate having an ink supply port, an ejection outlet for ejecting ink supplied through the supply port, and a flow path portion which provides fluid communication between the supply port and the ejection outlet. The flow path portion includes a near portion which is near to the substrate and a remote portion which is remote from the substrate, and a width of the near portion is different from a width of the remote portion in a sectional plane perpendicular to a direction of flow of the ink, and a stepped portion is provided between the near portion and the remote portion.Type: GrantFiled: May 2, 2007Date of Patent: July 19, 2011Assignee: Canon Kabushiki KaishaInventors: Takumi Suzuki, Masahiko Kubota, Tamaki Sato, Maki Kato, Kazuhiro Asai
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Patent number: 7982254Abstract: A protective film (56) having a water/hydrogen blocking function is formed so as to cover the periphery of a pad electrode (54a) while being electrically isolated from the pad electrode. A material selected in the embodiment for composing the protective film is a highly moisture-proof material having a water/hydrogen blocking function considerably superior to that of the insulating material, such as palladium (Pd) or palladium-containing material, and iridium (Ir) or iridium oxide (IrOx: typically x=2) or an iridium- or iridium oxide-containing material. An FeRAM capable of reliably preventing water/hydrogen from entering inside, and of maintaining high performance of the ferroelectric capacitor structure (30) may be realized only by a simple configuration.Type: GrantFiled: January 3, 2008Date of Patent: July 19, 2011Assignee: Fujitsu Semiconductor LimitedInventors: Kouichi Nagai, Katsuhiro Sato, Kaoru Sugawara, Makoto Takahashi, Masahito Kudou, Kazuhiro Asai, Yukimasa Miyazaki, Kaoru Saigoh
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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
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Patent number: 7971964Abstract: A method for manufacturing a liquid discharge head including an energy generating element, which generates energy utilized for discharging a liquid, and a discharge portion provided at a position facing the energy generating element and having a discharge port for discharging the liquid is provided. This method includes the steps of forming a negative photosensitive resin layer used for a member that forms the discharge port on the substrate, and exposing the layer to an i-line to form the discharge portion that is tapered in a direction from the substrate to the discharge port, wherein the layer has an absorbance per 1 ?m thickness of about 0.02 to about 0.07 for light used for the exposure.Type: GrantFiled: November 16, 2007Date of Patent: July 5, 2011Assignee: Canon Kabushiki KaishaInventors: Shoji Shiba, Akihiko Okano, Yoshikazu Saito, Kazuhiro Asai, Tamaki Sato, Takumi Suzuki, Masahiko Kubota, Maki Kato, Hiroe Ishikura, Shinsuke Tsuji
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Publication number: 20110148960Abstract: The opening area and shape of ejection orifices provided in an ejection orifice member influence the amount of liquid droplet. Therefore, it is necessary to check the opening area and shape of the ejection orifices in detail. For this purpose, in a liquid ejection head having ejection orifices used for ejecting liquid using energy generated by energy generating elements and a dummy ejection orifice having the same shape as the ejection orifices and not used for ejection of liquid, an examination member is provided at a position facing the dummy ejection orifice.Type: ApplicationFiled: November 23, 2010Publication date: June 23, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Masataka Nagai, Yoshinori Tagawa, Satoshi Ibe, Kazuhiro Asai, Masaki Ohsumi
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Publication number: 20110141193Abstract: An ink discharge head includes a coating resin layer having a plurality of discharge ports for discharging ink, and ink flow passages which communicate with the plurality of discharge ports, respectively; and a substrate having energy generation elements which generate the energy for discharging ink and provided with the coating resin layer. A crack inducing portion for relieving the stress produced at the interface between the coating resin layer and the substrate is formed at lateral faces of the outer peripheral edge of the coating resin layer.Type: ApplicationFiled: November 30, 2010Publication date: June 16, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Toshiaki Kurosu, Satoshi Ibe, Kazuhiro Asai, Yoshinori Tagawa
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Publication number: 20110141197Abstract: When an insulating layer is provided in order to protect an energy generating element, there arises a possibility that the layer dissolves in a contacting liquid. Therefore, in order to eject liquid, a first protection layer containing metal is provided on the insulating layer facing a substrate for a liquid-ejection head and a second protection layer containing metal is provided on the surface of a liquid supply port to which a base containing silicon is exposed.Type: ApplicationFiled: December 15, 2010Publication date: June 16, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Hiroto Komiyama, Yoshinori Tagawa, Satoshi Ibe, Mitsuru Chida, Kazuhiro Asai
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Publication number: 20110050828Abstract: A liquid discharge head of the present invention comprises a substrate and a flow path wall member provided on the substrate and having a wall of a flow path communicated with a discharge port for discharging liquid, wherein said flow path wall member is provided with a cavity not communicated with said flow path, when viewed in a direction from said discharge port toward said substrate, said cavity has a shape of a character, and said character corresponds to information regarding said liquid discharge head.Type: ApplicationFiled: August 6, 2010Publication date: March 3, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Kenji Fujii, Kazuhiro Asai, Makoto Watanabe, Yoshinori Tagawa, Yoshiyuki Imanaka, Yuuji Tamaru, Kousuke Kubo
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Publication number: 20100315467Abstract: A liquid discharge head includes, a substrate, a flow path wall member provided with a wall of a liquid flow path connected to a discharge port for discharging liquid, the flow path being formed by the flow path wall member and one surface of the substrate which are in contact with each other, and a coated resin member made of a cured material of a resin composition provided to cover end surfaces of the substrate, wherein a liquid repellent member having a contact angle of the resin composition larger than that of both the flow path wall member and the one surface is provided to cover at least a part of an intersection line between an outer lateral surface of the flow path wall member and the one surface.Type: ApplicationFiled: May 12, 2010Publication date: December 16, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Souta Takeuchi, Yoshinori Tagawa, Kazuhiro Asai, Hiroto Komiyama
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Publication number: 20100233630Abstract: A method for manufacturing a liquid discharge head that includes a flow path wall member which forms a wall of a flow path communicating with a discharge port for discharging a liquid and a substrate which forms the flow path in contact with the flow path wall member includes providing a first layer, which is made of a photosensitive resin on the substrate, for forming a pattern having a shape of the flow path, providing a second layer which is capable of absorbing light within a photosensitive wavelength range of the photosensitive resin and has a shape corresponding to the shape of the flow path, on the first layer so as to come into contact with the first layer, performing patterning of the first layer which includes exposure of the first layer with the light using the second layer as a mask, and forming the pattern from the first layer, providing a cover layer which is made of a photosensitive resin and serves as the flow path wall member so as to cover the second layer and the pattern, forming the dischaType: ApplicationFiled: March 10, 2010Publication date: September 16, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Makoto Watanabe, Yoshinori Tagawa, Satoshi Ibe, Kazuhiro Asai, Masaki Ohsumi, Masataka Nagai
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Publication number: 20100149280Abstract: A liquid ejection head according to the present invention includes a heat-generating resistor layer, a first electrode layer, an insulating layer extending over the heat-generating resistive layers and the first electrode layer, and a second electrode layer that has a first portion which extending through the insulating layer and which is electrically connected to the first electrode layer and also has a second portion which is not in contact with the insulating layer. The second portion has a space or a piece of resin disposed between the insulating layer and the second electrode layer.Type: ApplicationFiled: December 11, 2009Publication date: June 17, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Satoshi Ibe, Yoshinori Tagawa, Kazuhiro Asai, Hiroto Komiyama, Toshiaki Kurosu, Masataka Nagai
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Publication number: 20100037460Abstract: A liquid discharge head includes a substrate having an energy generating element configured to generate energy required to discharge liquid, a discharge port configured to discharge the liquid and provided in an opposed relationship to the energy generating element, a wall member defining a chamber adapted to store the energy required to discharge liquid the energy being generated by the energy generating element, a discharge portion defining a fluid path connecting the chamber and the discharge port, a supply path facilitating supplying the liquid into the chamber, and a pair of hollow portions provided in the wall member, wherein the hollow portions oppose each other and sandwich at least the entire discharge port in a direction from the discharge port to the substrate, and the hollow portions are independent of the chamber.Type: ApplicationFiled: October 19, 2009Publication date: February 18, 2010Applicant: Canon Kabushiki KaishaInventors: Naozumi Nabeshima, Toru Yamane, Takumi Suzuki, Masahiko Kubota, Tamaki Sato, Ryoji Kanri, Maki Hatta, Kazuhiro Asai
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Patent number: 7629111Abstract: A method for manufacturing a liquid discharge head includes the steps of depositing a solid layer for forming a flow path on a substrate on which an energy generating element is arranged to generate energy that is used to discharge liquid, forming, on the substrate where the solid layer is mounted, a coating layer for coating the solid layer, forming a discharge port used to discharge a liquid, through a photolithographic process, in the coating layer formed on the solid layer, and removing the solid layer to form a flow path that communicates with the energy element and the discharge port, whereby a material used for the coating layer contains a cationically polymerizable chemical compound, a cationic photopolymerization initiator and an inhibitor of cationic photopolymerization, and whereby a material of the solid layer that forms a boundary with a portion where the discharge port of the coating layer is formed contains a copolymer of methacrylic anhydride and methacrylate ester.Type: GrantFiled: June 27, 2005Date of Patent: December 8, 2009Assignee: Canon Kabushiki KaishaInventors: Masahiko Kubota, Takumi Suzuki, Tamaki Sato, Ryoji Kanri, Maki Hatta, Kazuhiro Asai, Shoji Shiba, Etsuko Hino, Hiroe Ishikura, Akihiko Okano