Liquid discharge apparatus and method for producing liquid discharge apparatus

A method for producing a liquid discharge apparatus which includes a liquid channel in which a discharge port through which the liquid is discharged is formed at one end of the liquid channel and a pressure chamber which stores the liquid is provided at an intermediate portion of the liquid channel;

• a piezoelectric layer which deforms to change a volume of the pressure chamber when a voltage is applied to the piezoelectric layer, the piezoelectric layer having one surface facing the pressure chamber;
• and a power feeding electrode which is electrically connected to the piezoelectric layer to apply the voltage to the piezoelectric layer, the method comprising:
• providing the piezoelectric layer such that the one surface of the piezoelectric layer faces the pressure chamber;
• providing a first insulating layer having a first through hole formed therein on the other surface of the piezoelectric layer such that the first through hole overlaps with the pressure chamber to expose a part of the other surface of the piezoelectric layer in the first through hole;
• injecting a liquid electroconductive material into the first through hole;
• and
• joining the power feeding electrode to the piezoelectric layer via the first insulating layer such that the power feeding electrode faces the other surface of the piezoelectric layer in the area via the first through hole.

A method for producing a liquid discharge apparatus which includes a liquid channel in which a discharge port through which the liquid is discharged is formed at one end of the liquid channel and a pressure chamber which stores the liquid is provided at an intermediate portion of the liquid channel;

• a piezoelectric layer which deform to change a volume of the pressure chamber when a voltage is applied to the piezoelectric layer, the piezoelectric layer having one surface facing the pressure chamber;
• and a power feeding electrode which is electrically connected to the piezoelectric layer to apply the voltage to the piezoelectric layer, the method comprising:
• providing the piezoelectric layer such that the one surface of the piezoelectric layer faces the pressure chamber;
• joining a drive electrode to the other surface of the piezoelectric layer such that the drive electrode corresponds to a position of the pressure chamber;
• providing a first insulating layer having a first through hole formed therein on the other surface of the piezoelectric layer such that the pressure chamber, the drive electrode, and the first through hole overlap with one another to expose the drive electrode in the first through hole;
• injecting a liquid electroconductive material into the first through hole;
• and
• joining the power feeding electrode to the piezoelectric layer via the first insulating layer such that the power feeding electrode faces the other surface of the piezoelectric layer via the first through hole.