Abstract: Provided is a liquid ejecting head including: a first board on which a driving element for ejecting liquid is installed; a second board which is installed on the surface of the first board and covers the driving element; a wiring board that includes a first surface on which a wiring, where a driving signal is supplied to the driving element, is formed and a second surface that is at the opposite side to the first surface, and where the first surface of a first end section is joined to the surface of the first board; and a filling material which covers the wiring by being formed at least between the first surface and a wall surface of the second board, in which the height of the filling material with respect to the surface of the first board is high at the first surface side in comparison to the second surface side.

Abstract: Provided is a liquid ejecting head including: a first board on which a driving element for ejecting liquid is installed; a second board which is installed on the surface of the first board and covers the driving element; a wiring board that includes a first surface on which a wiring, where a driving signal is supplied to the driving element, is formed and a second surface that is at the opposite side to the first surface, and where the first surface of a first end section is joined to the surface of the first board; and a filling material which covers the wiring by being formed at least between the first surface and a wall surface of the second board, in which the height of the filling material with respect to the surface of the first board is high at the first surface side in comparison to the second surface side.

Abstract: A liquid ejecting head includes a pressure element that applies a pressure to a pressure chamber which communicates with a nozzle which ejects a liquid, and a lead electrode that is joined to a wiring substrate which supplies a driving signal which drives the piezoelectric element, and the pressure element, in which a surface of the lead electrode on the wiring substrate side in a connection region between the lead electrode and the wiring substrate becomes a concavo-convex surface, in which the lead electrode and the wiring substrate are fixed to each other at a periphery of the connection region and at least one portion of a concave portion of the concavo-convex surface of the lead electrode with a non-conductive paste, and in which the lead electrode and the wiring substrate are electrically connected to each other at a convex portion of the concavo-convex surface of the lead electrode on which the non-conductive paste is not present.

Abstract: A liquid ejecting head includes a pressure element that applies a pressure to a pressure chamber which communicates with a nozzle which ejects a liquid, and a lead electrode that is joined to a wiring substrate which supplies a driving signal which drives the piezoelectric element, and the pressure element, in which a surface of the lead electrode on the wiring substrate side in a connection region between the lead electrode and the wiring substrate becomes a concavo-convex surface, in which the lead electrode and the wiring substrate are fixed to each other at a periphery of the connection region and at least one portion of a concave portion of the concavo-convex surface of the lead electrode with a non-conductive paste, and in which the lead electrode and the wiring substrate are electrically connected to each other at a convex portion of the concavo-convex surface of the lead electrode on which the non-conductive paste is not present.

Abstract: A liquid ejecting head includes a pressure element and a lead electrode that is joined to a wiring substrate which supplies a driving signal, and the pressure element, in which a surface of the lead electrode on the wiring substrate side in a connection region between the lead electrode and the wiring substrate becomes a concavo-convex surface, in which the lead electrode and the wiring substrate are fixed to each other at a periphery of the connection region and at least one portion of a concave portion of the concavo-convex surface of the lead electrode with a non-conductive paste, and in which the lead electrode and the wiring substrate are electrically connected to each other at a convex portion of the concavo-convex surface of the lead electrode on which the non-conductive paste is not present.

Abstract: A liquid ejecting head includes a pressure element and a lead electrode that is joined to a wiring substrate which supplies a driving signal, and the pressure element, in which a surface of the lead electrode on the wiring substrate side in a connection region between the lead electrode and the wiring substrate becomes a concavo-convex surface, in which the lead electrode and the wiring substrate are fixed to each other at a periphery of the connection region and at least one portion of a concave portion of the concavo-convex surface of the lead electrode with a non-conductive paste, and in which the lead electrode and the wiring substrate are electrically connected to each other at a convex portion of the concavo-convex surface of the lead electrode on which the non-conductive paste is not present.

Abstract: A method of manufacturing a piezoelectric element includes a piezoelectric layer forming step of sequentially and repeatedly performing a heat treatment step of applying a piezoelectric material containing lead to a lower electrode film at a relative humidity in the range of 30% to 50% Rh and then performing a heat treatment to form a piezoelectric precursor film and a crystallization step of firing the piezoelectric precursor film to form a piezoelectric film on the lower electrode film, thereby forming a piezoelectric layer.

Abstract: A male die for forming a member incorporated in a liquid ejection head is disclosed. Each of a plurality of first forging punches is operable to form a first recess on a metal plate. The first forging punches are arranged at a fixed pitch to form a punch row in a first direction. Each of a plurality of second forging punches is operable to form a second recess on the metal plate. The second forging punches are arranged adjacently to first forging punches located at both ends of the punch row. The first recess is to be a first part of the member which is used to eject liquid from the liquid ejection head, and the second recess is to be a second part of the member which is not used to eject liquid.

Abstract: A method of manufacturing a piezoelectric element includes a piezoelectric layer forming step of sequentially and repeatedly performing a heat treatment step of applying a piezoelectric material containing lead to a lower electrode film at a relative humidity in the range of 30% to 50% Rh and then performing a heat treatment to form a piezoelectric precursor film and a crystallization step of firing the piezoelectric precursor film to form a piezoelectric film on the lower electrode film, thereby forming a piezoelectric layer.

Abstract: A method of manufacturing an actuator apparatus includes forming, on the base plate, a test pattern that is electrically discontinuous with the electrodes of the piezoelectric element and has the same layer as the lower electrode, the test pattern having the lower electrode with the upper electrode and the piezoelectric material layer removed by etching, and measuring electric resistance of the lower electrode of the test pattern to acquire the etch amount of the lower electrode when the piezoelectric element is formed.

Abstract: An object is to provide a fine forging method for forming partitions of recesses precisely and forming recess shapes for pressure generation chambers etc. with high accuracy as well as a liquid ejection head that is produced by using the fine forming method. A fine forging method for forming groove-shaped recesses that are arranged at a prescribed pitch. After groove-shaped recesses are formed tentatively in a material plate by a first punch in which tentative forming punches are arranged, finish forming is performed on the tentatively formed groove-shaped recesses by using a second punch in which finish forming punches are arranged. An end portion of a projection strip is formed with slant faces or a slant face, whereby an end portion of each groove-shaped recess is formed precisely. A liquid ejection head produced by the above method exhibits stable liquid ejection characteristics and its manufacturing cost can be reduced by virtue of simplified working of forging.

Abstract: A method of forming a metal pattern comprising forming a metal film having a lower layer made of a metal and an upper layer made of a metal different from the metal of the lower layer, forming a resist film having a predetermined pattern on the upper layer, and patterning the metal film by etching the metal film using the resist film as a mask. Here, patterning the metal film comprises etching the upper layer, immersing the resist film and the upper layer in a pretreatment liquid containing a nonionic surfactant after the first etching process, and etching the lower layer after the immersing process.

Abstract: A male die is adapted to be opposed to a first face of a metallic plate member. The male die includes a plurality of punches which are provided on the male die and arranged side by side in a first direction with a fixed pitch. A guide member is formed with a guide face which supports a side portion of the male die, at least when the punches are pressed into the plate member in a second direction, to form through holes therein.

Abstract: A method of forming a metal pattern comprising forming a metal film having a lower layer made of a metal and an upper layer made of a metal different from the metal of the lower layer, forming a resist film having a predetermined pattern on the upper layer, and patterning the metal film by etching the metal film using the resist film as a mask. Here, patterning the metal film comprises etching the upper layer, immersing the resist film and the upper layer in a pretreatment liquid containing a nonionic surfactant after the first etching process, and etching the lower layer after the immersing process.

Abstract: An object is to provide a fine forging method for forming partitions of recesses precisely and forming recess shapes for pressure generation chambers etc. with high accuracy as well as a liquid ejection head that is produced by using the fine forming method. A fine forging method for forming groove-shaped recesses that are arranged at a prescribed pitch. After groove-shaped recesses are formed tentatively in a material plate by a first punch in which tentative forming punches are arranged, finish forming is performed on the tentatively formed groove-shaped recesses by using a second punch in which finish forming punches are arranged. An end portion of a projection strip is formed with slant faces or a slant face, whereby an end portion of each groove-shaped recess is formed precisely. A liquid ejection head produced by the above method exhibits stable liquid ejection characteristics and its manufacturing cost can be reduced by virtue of simplified working of forging.

Abstract: An object is to provide a fine forging method for forming partitions of recesses precisely and forming recess shapes for pressure generation chambers etc. with high accuracy as well as a liquid ejection head that is produced by using the fine forming method. A fine forging method for forming groove-shaped recesses that are arranged at a prescribed pitch. After groove-shaped recesses are formed tentatively in a material plate by a first punch in which tentative forming punches are arranged, finish forming is performed on the tentatively formed groove-shaped recesses by using a second punch in which finish forming punches are arranged. An end portion of a projection strip is formed with slant faces or a slant face, whereby an end portion of each groove-shaped recess is formed precisely. A liquid ejection head produced by the above method exhibits stable liquid ejection characteristics and its manufacturing cost can be reduced by virtue of simplified working of forging.

Abstract: There is disclosed a punch for forging a metallic plate member. A first die is adapted to be opposed to a first face of the plate member. A second die is adapted to be opposed to a second face of the plate member. A plurality of first projections are provided on the first die and arranged in a first direction with a fixed pitch. Each of the first projections is elongated in a second direction perpendicular to the first direction. A plurality of second projections are provided on the second die and arranged in the first direction with the fixed pitch. Each of the second projections is elongated in the second direction and provided with a concave portion extending in the second direction at a distal end portion thereof. The plate member is sandwiched between the first die and the second die so that the first projections and the second projections are cut into the plate member in a third direction orthogonal to the first direction and the second direction, to perform a first forging work.

Abstract: There is disclosed a method of manufacturing a chamber formation plate of a liquid ejection head. The chamber formation plate includes a first region formed with at least recess portions to be pressure generating chambers communicated with nozzles from which liquid droplets are ejected by pressure generated in the pressure generating chambers. A metal plate and a forging die are provided. A reference part is provided on the metal plate. The reference part defines a relative position between the first region and the forging die. At least one deformation absorber is provided at a second region of the metal plate where is between the first region and the reference part. At least one plastic working is performed by the forging die, with respect to the first region to form at least the recess portions, while plastic deformation of the metal plate caused by the plastic working is absorbed by the deformation absorber.

Abstract: A metallic plate member is provided. A first punch is operable to perform a first forging work to mold a first member in the plate member. The first member has a first function. A second punch is operable to perform a second forging work to mold a second member in the plate member. The second member including at least one kind of positioning member. The first forging work and the second forging work are performed at a single stage.

Abstract: A male die for forming a member incorporated in a liquid ejection head is disclosed. Each of a plurality of first forging punches is operable to form a first recess on a metal plate. The first forging punches are arranged at a fixed pitch to form a punch row in a first direction. Each of a plurality of second forging punches is operable to form a second recess on the metal plate. The second forging punches are arranged adjacently to first forging punches located at both ends of the punch row. The first recess is to be a first part of the member which is used to eject liquid from the liquid ejection head, and the second recess is to be a second part of the member which is not used to eject liquid.