Canon Kabushiki Kaisha

Yohei Hamade

Satoshi Tsutsui

Etsuko Sawada

Hiroaki Mihara

Kazunari Ishizuka

Ken Ikegame

Miho Ishii

Isamu Horiuchi

Shuichi Murakami

Isao Imamura

Keiji Tomizawa

Atsushi Omura

Hyou Takahashi

Toshikazu Nagatsuka

Shoji Shiba

Sachiko Yamauchi

Haruka Yamaji

Songhee Kim

Hikaru Sugimoto

A method for manufacturing a microstructure comprising cured products of photosensitive resin compositions, the method comprising: a step of forming at least two layers of the photosensitive resin compositions each comprising a photopolymerization initiator; a step of subjecting each of the formed at least two layers of the photosensitive resin compositions to patterning exposure; and a step of collectively developing the exposed at least two layers of the photosensitive resin compositions to obtain a microstructure, wherein in the at least two layers of the photosensitive resin compositions, 90% by mass or more of the photopolymerization initiators contained in at least one of the two adjacent layers of the photosensitive resin compositions is a nonionic photopolymerization initiator.

Method for manufacturing microstructure including cured products of photosensitive resin compositions

An ink jet recording head that includes a substrate having an ejection orifice for ejecting a liquid and a member provided with a recessed portion for accommodating the substrate, the head including a gap formed between a wall of the recessed portion of the member and the substrate, and a sealing material that seals the gap, in which the sealing material contains a cured product of a composition containing at least a hydrogenated bisphenol A type epoxy resin, a solid basic compound, and polythiol.

Ink jet recording head

An inkjet recording head comprising a flow channel member, wherein the flow channel member is formed of a heat-cured product of a molding material comprising a resin composition comprising a thermosetting epoxy resin and a curing agent, and a filler; the filler comprises alumina and silica; and with d50 as a median diameter of the silica and with alumina A as the alumina having a median diameter of d50/4 or less, the content of the alumina A is 11 parts by mass or more relative to 100 parts by mass of the silica.

Inkjet recording head and method for producing same

Provided is a method for manufacturing a liquid ejection head including an ejection orifice for ejecting a liquid, a substrate and a flow path forming member that is joined to the substrate to form a liquid flow path communicating with the ejection orifice, the method including: (1) forming a resin layer having a flow path mold pattern, on the substrate; (2) adding a hydrophilizing material represented by Chemical Formula 1 to an entire surface layer of the resin layer; (3) forming a covering resin layer serving as the flow path forming member, on the resin layer and forming a compatible layer containing the resin layer, the covering resin layer and the hydrophilizing material, at an interface between the resin layer and the covering resin layer; (4) forming the ejection orifice by exposing the covering resin layer; and (5) forming a flow path by removing the resin layer.

Method for manufacturing liquid ejection head and liquid ejection head

A hydrophilic coating material including an alginate compound having a bond with a silane compound is used. The material is produced by reacting a water-soluble alginate compound and a silane compound and then by adding a divalent metal ion to an alginic acid-derived carboxyl group in the reaction product.

Hydrophilic coating material, method for producing the same and inkjet recording head

A liquid discharge head including: a substrate having a liquid supply port; a flow channel forming member that is provided on the substrate and has discharge ports for discharging a liquid and a liquid flow channel that makes the liquid supply port and the discharge ports communicate with each other; and a support member that is provided on the substrate and arranged to be in contact with at least one surface of the flow channel forming member, with the one surface not being in contact with the liquid, wherein the flow channel forming member includes a cured product of a first photosensitive resin composition including a photosensitive resin, the support member includes a cured product of a second photosensitive resin composition including the epoxy resin A having a structure represented by formula (a1) or (a2) below in main chain structure: where, nand nrepresent integers of at least 2.

Liquid discharge head and method for manufacturing liquid discharge head

A liquid discharge head comprising a substrate comprising a liquid feeding port and an energy generating element for liquid discharge, and a flow channel member comprising, on the substrate, a discharge port through which a liquid is discharged and a liquid flow channel communicating with both the liquid feeding port and the discharge port, wherein the flow channel member comprises a flow channel member () not comprising a surface in contact with the liquid and a flow channel member () comprising a surface in contact with the liquid, a film stress Sand Sof the flow channel members () and (), respectively, satisfy S&#x3c;S, a film thickness Land Lof the flow channel member () and (), respectively, in a direction perpendicular to the substrate, satisfy L&#x3c;L, and satisfying 470 MPa&#xb7;&#x3bc;m&#x3c;[L&#xd7;S+(L&#x2212;L)&#xd7;S]&#x3c;1200 MPa&#xb7;&#x3bc;m.

Liquid discharge head and method for producing liquid discharge head

A liquid discharge head is provided which has a substrate, a flow channel forming member provided on a substrate surface of the substrate and forming a flow channel of a liquid, and a discharge port forming member provided on the flow channel forming member and having a discharge port through which a liquid is discharged, wherein the discharge port forming member and the flow channel forming member are formed of materials different from each other, a thickness of the flow channel forming member is greater than a thickness of the discharge port forming member in a direction perpendicular to the substrate surface, the discharge port forming member is a cured product of a photosensitive resin composition, and the flow channel forming member contains at least one resin selected from the group consisting of a polyether amide resin, a polyether imide resin and a polyether amide-imide resin.

A hydrophilic coating material including an alginic acid compound and a resin, in which the alginic acid compound is granulated and dispersed in the resin. In a coating film using the material, it is preferred that the granulated alginic acid compound is exposed on the surface. Such a hydrophilic coating film is suitable as a hydrophilization treatment film of a nozzle face surface of an inkjet recording head.

Hydrophilic coating material, method of producing hydrophilic coating film, and inkjet recording head

A method of detecting an organic residue is provided. The method comprises a step of bringing a liquid A into contact with a surface of a base material; a step of measuring the contact angle (i) of a liquid B on the surface with which the liquid A came into contact; a step of heating and drying the base material; a step of measuring the contact angle (ii) of the liquid B on the dried surface; and a step of comparing the contact angle (i) with the contact angle (ii).

Organic residue inspecting method and liquid discharge head producing method

A method for manufacturing a coating material containing a condensate of a hydrolytic silane compound includes a process of obtaining a condensate of a fluorine-containing hydrolytic silane compound and a process of causing the condensate to react with fluoroalcohol.

Method for manufacturing coating material

A liquid ejection head includes an ejection orifice configured to eject a liquid, the ejection orifice has at least one protrusion protruding from the peripheral portion of the ejection orifice toward the center of the ejection orifice, and the protrusion includes, on the outer surface including at least the protrusion edge, a highly water-repellent region having a higher water repellency than that of the outer surface of the periphery of the ejection orifice.

Liquid ejection head, method for producing the same, and printing apparatus

In at least one embodiment of a method for forming a pattern having a hollow structure, a light-absorbing layer capable of absorbing light is formed on a surface of a photosensitive resin film. Subsequently, a substrate having a protrusion and the photosensitive resin film are bonded together so that the protrusion and the light-absorbing layer come into contact with each other. Then, the photosensitive resin film and the light-absorbing layer are patterned at one time by photolithography.

Method for forming pattern having hollow structure

In an inkjet recording head comprising a substrate including an energy-generating element that generates energy for ejecting a liquid, an ejection port for ejecting the liquid, and a liquid flow passage communicating with the ejection port, a liquid-repellent layer is formed on a surface of a member for forming the ejection port, and a liquid-repellent region and a liquid-nonrepellent region are formed on the same surface of the liquid-repellent layer by irradiating a part of the liquid-repellent layer with light including a wavelength decomposing the liquid-repellent component in the liquid-repellent layer.

Inkjet recording head and method of manufacturing the same

Provided is a liquid-ejecting head, including a member having opened therein an ejection orifice configured to eject a liquid, in which the liquid-ejecting head has, on a side being positioned on the member and having opened therein the ejection orifice, a cured layer of a mixture containing: (a) a condensate of hydrolyzable silane compounds containing a hydrolyzable silane compound having 20 or more fluorine atoms and a hydrolyzable silane compound having a cationically polymerizable group; (b) a fluorine atom-containing nonionic surfactant; and (c) an epoxy resin.

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Tokyo, Japan

Yohei Hamade