Fujifilm Corporation

Yasuhiko Maeda

Katsumi Enomoto

Ken Kawata

Michiaki Murata

Seiichi Inoue

A sealing sheet is configured to restrain at least one of leakage of liquid in and out. The sealing sheet includes: a film member which is impermeable to the liquid and configured to cover a region that needs to be sealed; and electrical wires which are arranged on the film member. An electrical signal corresponding to change in electrical resistance due to contact with the liquid is obtainable from the electrical wires.

Sealing sheet, and liquid ejection head and inkjet apparatus using same

The liquid ejection head for ejecting liquid from nozzles includes: pressure chambers connecting to the nozzles; a common liquid chamber which is connected to the pressure chambers, is arranged across the pressure chambers from the nozzles, and is defined by at least a multi-layer wiring substrate which has a recess-shaped structure including a base section forming one of a ceiling and a floor of the common liquid chamber and a projecting section forming a side wall of the common liquid chamber; electrical wires which are formed at least partially inside the multi-layer wiring substrate; and a connection electrode which is provided in a top of the projecting section of the multi-layer wiring substrate.

Liquid ejection head and image forming apparatus including liquid ejection head

The electrical connection structure includes: a first substrate which has a first electrode part; a second substrate which has a second electrode part opposing the first electrode part, and a wiring pattern connected to the second electrode part; an insulating cavity substrate which is disposed between the first substrate and the second substrate and has a through hole in a position corresponding to the first electrode part, the through hole being deeper that a sum of a height of the first electrode part and a height of the second electrode part and having an opening surface area not smaller that an area of the first electrode part; and conductive material which is filled in the through hole.

Electrical connection structure, liquid ejection head, method of manufacturing same, and image forming apparatus

A metal pattern forming method includes the steps of: applying one of a metal salt solution and an acetylene compound solution onto the substrate, the acetylene compound solution containing an acetylene compound expressed by a general formula of:(R.(C&#x2261;C))-(L)-(A),where R is one of a metal element, hydrogen, a carboxyl group or salt thereof, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, an aralkyl group and a heterocyclic group, L is one of a compound linking A with a carbon-carbon triple bond and a group having (k+m) valency, A is one of a polyoxyether group, a polyaminoether group and polythioether group, k and l are integers not less than 1, and m is an integer not less than 0; and then applying the other of the metal salt solution and the acetylene compound solution onto the substrate so that the metal salt solution reacts with the acetylene compound solution to form a metal precipitate on the substrate, wherein at least one of the applying steps is performed by using an inkjet apparatus to directly form the metal pattern composed of the metal precipitate on the substrate.

Metal pattern forming method

The liquid ejection head has: a plurality of head units each of which includes a plurality of nozzles, a plurality of pressure chambers connected respectively to the plurality of nozzles, liquid supply ports for supplying liquid respectively to the plurality of pressure chambers, and a plurality of actuators causing the liquid to be ejected respectively from the plurality of nozzles; and a single common liquid chamber plate formed with a common liquid chamber which supplies the liquid to the plurality of pressure chambers of the plurality of head units, wherein: the plurality of head units are arranged in a planar configuration; the plurality of head units are covered with the single common liquid chamber plate; and the common liquid chamber is provided in common to the plurality of head units.

Liquid ejection head, method of manufacturing liquid ejection head and image forming apparatus

The electrical wiring structure includes an electrical connection section where a first electrode and a second electrode are connected, wherein: the electrical connection section is formed by a first alloy containing at least gallium metal; and the first alloy has a melting point lower than 30&#xb0; C.

Electrical wiring structure, liquid ejection head, liquid ejection apparatus and image forming apparatus

The liquid ejection head includes: a plurality of pressure chambers into which liquid is filled; a plurality of nozzles which are connected to the pressure chambers; a common flow channel which supplies the liquid to the pressure chambers; a plurality of liquid ejection devices which cause the liquid inside the pressure chambers to be ejected through the nozzles; a selector circuit which selects one of the liquid ejection devices to be a destination of a drive signal; a first wiring substrate which transmits the drive signal outputted from the selector circuit to be applied to the one of the liquid ejection devices; and a second wiring substrate which transmits the drive signal to be inputted to the selector circuit, wherein the first wiring substrate is connected to a first face of a member constituting the selector circuit, and the second wiring substrate is connected to a second face of the member constituting the selector circuit, the first and second faces being different to each other.

Liquid ejection head and image forming apparatus

The method manufactures a liquid ejection head comprising a pressure chamber which accommodates liquid, a diaphragm which forms a portion of the pressure chamber, a piezoelectric element which is disposed on the diaphragm and deforms the pressure chamber through the diaphragm to pressurize the liquid in the pressure chamber so as to eject the liquid from an ejection port in connection with the pressure chamber. The method comprises: a resist layer forming step of applying a resist in a liquid state onto the diaphragm on which the piezoelectric element has been disposed so as to cover the piezoelectric element, and curing the resist to form a resist layer on the diaphragm; a space forming step of separately removing the resist covering a movable portion of the piezoelectric element and the resist covering an electrical connection portion of the piezoelectric element, by exposing and developing the resist formed on the diaphragm, to separately form a movement space and a connection space for the piezoelectric element, in the resist layer; and a conductive material filling step of filling a conductive material into the connection space formed in the resist layer.

Method of manufacturing a liquid ejection head

The liquid ejection head includes: a head main body which is constructed from a plurality of head units layered together in a layering direction perpendicular to a liquid ejection direction of nozzles, each of the head units having the nozzles, pressure chambers connected with the nozzles and arranged in a one-dimensional configuration, and piezoelectric elements corresponding to the pressure chambers and arranged in a one-dimensional configuration, the head main body having through channels substantially parallel to the layering direction of the head units, the through channels being in connection with the pressure chambers; and first and second liquid accommodating chambers which are arranged on sides of the head main body opposing to each other in the layering direction of the head units, the first and second liquid accommodating chambers being in connection with the through channels.

Liquid ejection head, image forming apparatus and liquid supply method for liquid ejection head

The liquid ejection head includes: a liquid ejection unit which includes nozzles ejecting liquid, pressure chambers connected with the nozzles and filled with the liquid, and piezoelectric elements pressurizing the liquid in the pressure chambers; a frame substrate which has a hole section passing through the frame substrate and is disposed on a side of the liquid ejection unit reverse to a side on which the nozzles are arranged, the hole section being defined with a lateral wall and corresponding to a common liquid chamber accumulating the liquid to be supplied to the pressure chambers; a cover plate which is arranged on a side of the frame substrate reverse to a side adjacent to the liquid ejection unit; and through electrodes which pass through the lateral wall of the frame substrate and are exposed on the side adjacent to the liquid ejection unit and the side adjacent to the cover plate, wherein the piezoelectric elements are applied with drive signals via the through electrodes.

Liquid ejection head, method of manufacturing liquid ejection head, and image forming apparatus

A liquid ejection head having a flow channel plate in which liquid flow channels are formed and an actuator forming plate on which actuators for generating pressure which ejecting the liquid are formed. Plate bonding parts through which the flow channel plate and the actuator forming plate are bonded together, and electrical bonding parts through which electrical signals are supplied to the actuators, are bonded by non-conductive pastes having same curing conditions.

Liquid ejection head, image forming apparatus and method of manufacturing liquid ejection head

A liquid ejection head having a plurality of ejection ports which eject liquid, a plurality of pressure chambers which are connected respectively to the ejection ports, a plurality of piezoelectric elements which are disposed on a side of the pressure chambers reverse to a side adjacent to the ejection ports and respectively deform the pressure chambers, and a laminated body which is disposed on the side of the pressure chambers reverse to the side adjacent to the ejection ports and includes a plurality of ceramic thin plates arranged to overlap each other. The laminated body is formed with a common liquid chamber which supplies the liquid to the pressure chambers, and electrical wires which supply drive signals to the piezoelectric elements and are formed so as to rise upward in a direction substantially perpendicular to a surface on which the piezoelectric elements are disposed.

The liquid ejection head comprises: a plurality of ejection ports which eject liquid; a plurality of pressure chambers which are communicated with the ejection ports; a plurality of piezoelectric elements which are arranged to sides of the pressure chambers opposite sides of the pressure chambers where the ejection ports are formed, the piezoelectric elements each having driving electrodes, the piezoelectric elements each deforming the pressure chambers when drive signals are applied through the driving electrodes; a protective member which covers the piezoelectric elements and has a first wiring layer electrically connected to a first external wiring; a common liquid chamber which is arranged on the protective member on the sides of the plurality of pressure chambers opposite the sides of the pressure chambers where the ejection ports are formed, a wall of the common liquid chamber opposite the protective member having a second wiring layer electrically connected to a second external wiring, the common liquid chamber supplying the liquid to the plurality of pressure chambers; and a plurality of wiring members which are electrically connected to the second wiring layer and formed so that at least a part of each of the wiring members extends inside the common liquid chamber in a direction substantially perpendicular to a surface on which the piezoelectric elements are arranged, wherein a part of the driving electrodes of the piezoelectric elements are electrically connected to the first wiring layer, and another part of the driving electrodes of the piezoelectric elements are electrically connected to the second wiring layer through the wiring members.

Growing community of inventors

Kanagawa-ken, Japan

Yasuhiko Maeda