Abstract: A liquid ejection head is manufactured by covering a mold material arranged on a patterned protecting layer on a substrate and subsequently removing the mold material to produce a flow path. A sacrificial layer employed as the mold material operates as mask for patterning the protecting layer.

Abstract: 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.

Abstract: A method for manufacturing a liquid discharge head includes a transferring step of transferring a dry film supported by a supporting member to a substrate having a hole, and a peeling step of peeling the supporting member off the dry film on the substrate. In the peeling step, the dry film is in contact with a wall surface defining the hole in the substrate.

Abstract: A method for manufacturing a liquid discharge head includes a transferring step of transferring a dry film supported by a supporting member to a substrate having a hole, and a peeling step of peeling the supporting member off the dry film on the substrate. In the peeling step, the dry film is in contact with a wall surface defining the hole in the substrate.

Abstract: 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.

Abstract: A method of manufacturing a structure includes (1) positioning a first resin layer provided on a first supporting member on a substrate having a through hole, with the first resin layer facing toward the substrate, and releasing the first supporting member from the first resin layer; and (2) positioning a second resin layer provided on a second supporting member on the first resin layer from which the first supporting member has been released, with the second resin layer facing toward the first resin layer, and releasing the second supporting member from the second resin layer. A first resin layer portion that is above the through hole is removed before or simultaneously with the releasing of the first supporting member.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A process for producing a liquid discharge head including a substrate having a liquid supply path passing through from its first surface to second surface and an discharge port forming member having a discharge port communicating with the supply path through a flow path, the process including providing a first layer of photosensitive resin in a region covering an opening of the supply path in the first surface; forming a latent image of a pattern of the flow path in the first layer by exposure; providing a second layer of negative photosensitive resin on the first layer; curing a portion, opposing to the opening of the supply path in the first surface, of the second layer; forming a latent image of a pattern of the discharge port in the second layer by exposure; and developing latent images of patterns of the flow path and discharge port.

Abstract: The invention provides a process for producing a liquid ejection head having an ejection orifice forming member in which an ejection orifice for ejecting a liquid has been formed, and a substrate having an energy-generating element for generating energy for ejecting a liquid from the ejection orifice on the side of a front surface thereof, the process includes the steps of providing a film having a support, a first layer and a second layer in this order, arranging the film on the substrate in such a manner that the second layer faces the front surface, detaching the support from the film arranged, forming the ejection orifice in the second layer, and removing at least a part of the first layer from the second layer.

Abstract: A method of manufacturing a substrate for a liquid ejection head including an ejection port forming member which has formed therein ejection ports, includes the steps of: forming a first layer by using a first layer forming member; forming a second layer on the first layer by using a second layer forming member; and hardening a partial region of each of the first layer and the second layer and removing a region different from the partial region so as to form the ejection ports, resulting in that the first layer and the second layer constitute the ejection port forming member, and a member containing a solvent to dissolve the first layer forming member and a photo-acid-generating agent having an acid strength weaker than an acid strength of the photo-acid-generating agent contained in the first layer forming member is used as the second layer forming member.

Abstract: The present invention provides a process for producing a liquid ejection head, the process including: (1) forming a mold pattern of a liquid flow path and a base pattern surrounding the mold pattern on a substrate, (2) disposing a covering layer to cover the mold pattern and the base pattern, (3) forming at least an ejection orifice in the covering layer to form an orifice plate, and (4) removing the mold pattern and the base pattern, in which the base pattern has such a form that the orifice plate is formed to have a side wall portion constituting a side wall of the liquid flow path and a plurality of support structures that are disposed on the substrate in a peripheral region of the side wall portion and support an upper surface portion constituting an upper wall of the orifice plate.

Abstract: A process for producing a liquid ejection head, comprising providing a substrate with an energy-generating element for ejecting liquid and a wiring; forming a flow path wall forming layer containing a negative photosensitive resin on the substrate; exposing a portion to be a flow path wall of the flow path wall forming layer; forming an ejection orifice forming layer containing a negative photosensitive resin on the flow path wall forming layer; applying a material for a water-repellent layer onto the ejection orifice forming layer; drying a solvent contained in the applied material to form the water-repellent layer; exposing another region than a portion to be an ejection orifice of the ejection orifice forming layer and the water-repellent layer; and dissolving and removing the non-exposed portions, wherein the boiling point of the solvent is not more than the drying temperature in the step to form the water-repellent layer.

Abstract: A liquid ejection head includes a substrate and a channel wall member on a surface of the substrate. The channel wall member serves as a wall of a channel through which a liquid flows. The channel wall member comprises a photosensitive resin. The channel wall member includes a first region and a second region that are arranged in a direction parallel to the surface of the substrate. The first region of the channel wall member has a higher crosslink density than the second region of the channel wall member.

Abstract: A method of manufacturing a structure includes (1) positioning a first resin layer provided on a first supporting member on a substrate having a through hole, with the first resin layer facing toward the substrate, and releasing the first supporting member from the first resin layer; and (2) positioning a second resin layer provided on a second supporting member on the first resin layer from which the first supporting member has been released, with the second resin layer facing toward the first resin layer, and releasing the second supporting member from the second resin layer. A first resin layer portion that is above the through hole is removed before or simultaneously with the releasing of the first supporting member.

Abstract: A liquid ejection head includes a substrate and a channel wall member on a surface of the substrate. The channel wall member serves as a wall of a channel through which a liquid flows. The channel wall member comprises a photosensitive resin. The channel wall member includes a first region and a second region that are arranged in a direction parallel to the surface of the substrate. The first region of the channel wall member has a higher crosslink density than the second region of the channel wall member.