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: 8481249Abstract: A method for manufacturing a recording head including forming a flow-channel side-wall forming layer which contains a photosensitive resin, on a substrate having ejection energy generating elements and wiring thereon; exposing the flow-channel side-wall forming layer to light, and optically determining a flow channel; forming a shape stabilizing layer which contains a photosensitive resin; forming an ejection orifice forming layer which contains a photopolymerization initiator and a negative photosensitive resin; exposing the ejection orifice forming layer to light, and optically determining an ejection orifice; and developing the ejection orifice forming layer, shape stabilizing layer, and flow-channel side-wall forming layer, in the order named. The photosensitive resin in the shape stabilizing layer is a material to be cured by a component that is produced upon the exposure of the ejection orifice forming layer and derives from the photopolymerization initiator.Type: GrantFiled: July 3, 2012Date of Patent: July 9, 2013Assignee: Canon Kabushiki KaishaInventors: Keiji Matsumoto, Kazuhiro Asai, Tetsuro Honda, Kunihito Uohashi, Shuji Koyama, Masaki Ohsumi
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Patent number: 8450050Abstract: A method for manufacturing a recording head including forming a flow-channel side-wall forming layer which contains a photosensitive resin, on a substrate having ejection energy generating elements and wiring thereon; exposing the flow-channel side-wall forming layer to light, and optically determining a flow channel; forming a shape stabilizing layer which contains a photosensitive resin; forming an ejection orifice forming layer which contains a photopolymerization initiator and a negative photosensitive resin; exposing the ejection orifice forming layer to light, and optically determining an ejection orifice; and developing the ejection orifice forming layer, shape stabilizing layer, and flow-channel side-wall forming layer, in the order named. The photosensitive resin in the shape stabilizing layer is a material to be cured by a component that is produced upon the exposure of the ejection orifice forming layer and derives from the photopolymerization initiator.Type: GrantFiled: July 3, 2012Date of Patent: May 28, 2013Assignee: Canon Kabushiki KaishaInventors: Keiji Matsumoto, Kazuhiro Asai, Tetsuro Honda, Kunihito Uohashi, Shuji Koyama, Masaki Ohsumi
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Patent number: 8388084Abstract: 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: GrantFiled: November 23, 2010Date of Patent: March 5, 2013Assignee: Canon Kabushiki KaishaInventors: Masataka Nagai, Yoshinori Tagawa, Satoshi Ibe, Kazuhiro Asai, Masaki Ohsumi
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Patent number: 8388106Abstract: 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: GrantFiled: November 30, 2010Date of Patent: March 5, 2013Assignee: Canon Kabushiki KaishaInventors: Toshiaki Kurosu, Satoshi Ibe, Kazuhiro Asai, Yoshinori Tagawa
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Patent number: 8376525Abstract: Provided is a method of manufacturing a liquid discharge head including: forming a first pattern for forming the flow path on the substrate; forming a first coating layer which covers the first pattern; forming a hole in the first coating layer, through which the first pattern is exposed; forming a second pattern for forming the flow path on the first coating layer, such that the second pattern contacts with the first pattern through the hole; forming a second coating layer for covering the second pattern; forming the discharge port in the second coating layer; and removing the first pattern and the second pattern to form the flow path.Type: GrantFiled: August 20, 2007Date of Patent: February 19, 2013Assignee: Canon Kabushiki KaishaInventors: Kazuhiro Asai, Takumi Suzuki, Masahiko Kubota, Tamaki Sato, Maki Kato
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Patent number: 8371680Abstract: 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: GrantFiled: December 15, 2010Date of Patent: February 12, 2013Assignee: Canon Kabushiki KaishaInventors: Hiroto Komiyama, Yoshinori Tagawa, Satoshi Ibe, Mitsuru Chida, Kazuhiro Asai
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Patent number: 8367541Abstract: After a ferroelectric capacitor is formed, an Al wiring (conductive pad) connected to the ferroelectric capacitor is formed. Then, a silicon oxide film and a silicon nitride film are formed around the Al wiring. Thereafter, as a penetration inhibiting film which inhibits penetration of moisture into the silicon oxide film, an Al2O3 film is formed.Type: GrantFiled: July 27, 2005Date of Patent: February 5, 2013Assignee: Fujitsu Semiconductor LimitedInventors: Kouichi Nagai, Hitoshi Saito, Kaoru Sugawara, Makoto Takahashi, Masahito Kudo, Kazuhiro Asai, Yukimasa Miyazaki, Katsuhiro Sato, Kaoru Saigoh
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Publication number: 20130029056Abstract: A method for manufacturing a liquid ejecting head including an orifice plate having an ejecting orifice and a liquid channel, and a substrate having a liquid ejecting energy generating element and a liquid supply port, the method including: (1) forming a liquid channel mold of a soluble resin dissolved in (6) on the substrate; (2) coating the liquid channel mold with a photosensitive resin layer having a refractive index of n at an exposure wavelength used in (4); (3) forming an antireflective film having a refractive index of ?n?0.2 or more to ?n+0.2 or less at the exposure wavelength used in (4) on the photosensitive resin layer; (4) exposing and developing the photosensitive resin layer and antireflective film to form the ejecting orifice; (5) forming the liquid supply port on the substrate; and (6) dissolving and removing the liquid channel mold from the liquid supply port.Type: ApplicationFiled: July 10, 2012Publication date: January 31, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Kazuhiro Asai, Masaki Ohsumi, Yoshinori Tagawa
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Publication number: 20130027468Abstract: A liquid ejecting head including a liquid ejecting port for ejecting a liquid and nozzle layer having a liquid channel communicating with the liquid ejecting port, wherein the nozzle layer has two layers, and a first layer which is a layer at the side of the liquid channel among the two layers has a resin film-formed with an acid and has a smaller static contact angle of water as compared with a second layer which is the other layer.Type: ApplicationFiled: June 29, 2012Publication date: January 31, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Masaki Ohsumi, Yoshinori Tagawa, Kazuhiro Asai
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Publication number: 20130017496Abstract: A method for manufacturing a recording head including forming a flow-channel side-wall forming layer which contains a photosensitive resin, on a substrate having ejection energy generating elements and wiring thereon; exposing the flow-channel side-wall forming layer to light, and optically determining a flow channel; forming a shape stabilizing layer which contains a photosensitive resin; forming an ejection orifice forming layer which contains a photopolymerization initiator and a negative photosensitive resin; exposing the ejection orifice forming layer to light, and optically determining an ejection orifice; and developing the ejection orifice forming layer, shape stabilizing layer, and flow-channel side-wall forming layer, in the order named. The photosensitive resin in the shape stabilizing layer is a material to be cured by a component that is produced upon the exposure of the ejection orifice forming layer and derives from the photopolymerization initiator.Type: ApplicationFiled: July 3, 2012Publication date: January 17, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Keiji Matsumoto, Kazuhiro Asai, Tetsuro Honda, Kunihito Uohashi, Shuji Koyama, Masaki Ohsumi
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Patent number: 8342659Abstract: A liquid discharge head includes a substrate and a flow path wall member provided on the substrate and having a wall defining a flow path connected to a discharge port for discharging liquid. The flow path wall member is provided with a cavity not connected to the flow path, when viewed in a direction from the discharge port toward the substrate, the cavity has a shape of a character, and the character corresponds to information regarding the liquid discharge head.Type: GrantFiled: August 6, 2010Date of Patent: January 1, 2013Assignee: Canon Kabushiki KaishaInventors: Kenji Fujii, Kazuhiro Asai, Makoto Watanabe, Yoshinori Tagawa, Yoshiyuki Imanaka, Yuuji Tamaru, Kousuke Kubo
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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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Patent number: 8256878Abstract: 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: GrantFiled: December 11, 2009Date of Patent: September 4, 2012Assignee: Canon Kabushiki KaishaInventors: Satoshi Ibe, Yoshinori Tagawa, Kazuhiro Asai, Hiroto Komiyama, Toshiaki Kurosu, Masataka Nagai
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Patent number: 8227043Abstract: A method for manufacturing a liquid discharge head includes the steps of: forming 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 deposited on the solid layer; and removing the solid layer to form a flow path that communicates with the energy element and the discharge port. A material used for the coating layer contains a cationically polymerizable chemical compound, a cationic photopolymerization initiator and an inhibitor of cationic photopolymerization, and 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 acid and methacrylate ester.Type: GrantFiled: June 27, 2005Date of Patent: July 24, 2012Assignee: Canon Kabushiki KaishaInventors: Masahiko Kubota, Takumi Suzuki, Tamaki Sato, Ryoji Kanri, Maki Hatta, Kazuhiro Asai, Shoji Shiba, Etsuko Hino, Hiroe Ishikura, Akihiko Okano
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Publication number: 20120182544Abstract: An object of the present invention is to provide a device which detects matter suspended in air, represented by, for example, ice crystals, volcanic ash, in the forward direction of the flight of an aircraft. A method of detecting matter suspended in air of this invention is characterized in that, in airborne Doppler LIDAR using laser light, components of matter subjected to laser light reflection and scattering are remotely measured on a basis of an angular difference in planes of polarization of transmitted light which is laser light radiated into the atmosphere, and received light scattered by matter suspended in air in a remote region.Type: ApplicationFiled: January 4, 2012Publication date: July 19, 2012Applicant: JAPAN AEROSPACE EXPLORATION AGENCYInventors: Takashi Asahara, Hamaki Inokuchi, Kazuhiro Asai
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Patent number: 8220901Abstract: 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: GrantFiled: May 12, 2010Date of Patent: July 17, 2012Assignee: Canon Kabushiki KaishaInventors: Souta Takeuchi, Yoshinori Tagawa, Kazuhiro Asai, Hiroto Komiyama
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Patent number: 8197705Abstract: A method of manufacturing a substrate for a liquid discharge head having a silicon substrate in which a liquid supply port is provided includes providing the silicon substrate, an etching mask layer having an aperture being formed on one surface of the silicon substrate, forming a region comprising an amorphous silicon in the interior of the silicon substrate by irradiating the silicon substrate with laser light, forming a recess, which has an opening at a part of a portion exposed from the aperture on the one surface, from the one surface of the silicon substrate toward the region, and forming the supply port by performing etching on the silicon substrate in which the recess and the region have been formed from the one surface through the aperture of the etching mask layer.Type: GrantFiled: September 3, 2008Date of Patent: June 12, 2012Assignee: Canon Kabushiki KaishaInventors: Keisuke Kishimoto, Hirokazu Komuro, Satoshi Ibe, Takuya Hatsui, Kazuhiro Asai, Shimpei Otaka, Hiroto Komiyama
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Publication number: 20120140000Abstract: An ink jet recording head capable of maintaining ink supply capability for a long period of time, including a substrate provided with a plurality of energy generating elements and an ink supply port, and a flow path member which has a plurality of discharge ports, a plurality of ink flow paths in communication with the plurality of discharge ports, and a common liquid chamber in communication with the plurality of ink flow paths, in which the common liquid chamber is divided into a discharge port area and a drainage port area, the ink flows into the discharge port area through a filter, and in the case where a smallest diameter among the diameters of the discharge ports and the diameters of the ink flow paths is denoted by A and a largest diameter of openings of the filter is denoted by B, A?B is satisfied.Type: ApplicationFiled: November 3, 2011Publication date: June 7, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Hiroyuki Murayama, Yoshinori Tagawa, Mitsuru Chida, Kazuhiro Asai
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Patent number: 8191260Abstract: A manufacturing method of a liquid ejection head includes forming on a substrate a first flow passage wall forming member contacting a solid layer of equal height, exposing a first layer of a negative photosensitive resin material to form an ejection outlet forming member; exposing a second layer, on the first layer, of a negative photosensitive resin material to form a second flow passage wall forming member for forming another part of the wall of the flow passage; placing the exposed first and second layers on the solid layer and the first flow passage wall forming member so that a non-exposed portion of the second layer contacts the solid layer; forming parts of the flow passage and the ejection outlet by removing non-exposed portions of the first and second layers above the substrate; and forming the flow passage by removing the solid layer.Type: GrantFiled: March 9, 2009Date of Patent: June 5, 2012Assignee: Canon Kabushiki Kaisha KaishaInventors: Maki Kato, Masaki Ohsumi, Yoshinori Tagawa, Kazuhiro Asai, Masahiko Kubota, Tamaki Sato, Akihiko Okano