Ink jet head

An ink jet head comprising:

• a main body comprising a plurality of nozzles, a plurality of pressure chambers, a plurality of actuators, and a plurality of actuator terminals, wherein each nozzle is connected to a uniquely corresponding pressure chamber, each pressure chamber is coupled with a uniquely corresponding actuator, each actuator is connected to a uniquely corresponding actuator terminal, wherein the actuator terminals are distributed on a surface of the main body to form matrix pattern and when a driving voltage is applied to a selected actuator terminal, ink within the pressure chamber coupled with the actuator connected to the selected actuator terminal is pressed and ink is discharged from the nozzle connected to the pressure chamber;
• a driver IC comprising a plurality of input contacts, and a plurality of output contacts distributed on a surface of the driver IC, wherein the driver IC is configured to select any output contact among the plurality of output contacts and transmit the driving voltage to the selected output contact;
• and
• a sheet having a first surface and a second surface, the driver IC being mounted at the first surface of the sheet and the sheet being fixed to the main body at the second surface, the sheet comprising a plurality of stacked layers including a first insulating layer and a second insulating layer, a plurality of input terminals, a plurality of first intermediate terminals distributed on the first surface, a plurality of second intermediate terminals distributed on the first surface, a plurality of output terminals distributed on the second surface forming the same matrix pattern, a plurality of first wirings connecting the input terminals and the first intermediate terminals, a plurality of second wirings connecting the second intermediate terminals and the output terminals, wherein the second wirings pass through the sheet from the first surface to the second surface, and wherein a surface of the first insulating layer contacts a surface of the second insulating layer,
• wherein each first intermediate terminal is connected to a uniquely corresponding input contact of the driver IC, each output contact of the driver IC is connected to a uniquely corresponding second intermediate terminal, and each output terminal is connected to a uniquely corresponding actuator terminal of the main body,
• wherein a portion of the second wirings connected to the output terminals at a first row of the matrix pattern is formed on a surface of the first insulating layer, and
• wherein a portion of the second wirings connected to the output terminals at a second row of the matrix pattern is formed on a surface of the second insulating layer.

An ink jet head comprising:

• a main body including:
• a plurality of nozzles,
• a plurality of pressure chambers, wherein each of the plurality of nozzles is connected to a corresponding pressure chamber,
• a plurality of actuators, wherein each pressure chamber is coupled with a uniquely corresponding actuator, and
• a plurality of actuator terminals, wherein each actuator is connected to a uniquely corresponding actuator terminal such that when a driving voltage is applied to a selected actuator terminal, ink in the pressure chamber corresponding to the actuator connected to the selected actuator terminal is pressed, wherein the plurality of actuator terminals are distributed on a surface of the main body to form a matrix pattern;
• a driver IC configured to select the selected actuator terminal and to transmit the driving voltage to the selected actuator terminal;
• and
• a sheet including:
• a first surface and a second surface, wherein the driver IC is mounted on a first surface of the sheet and wherein the sheet is fixed to the main body on the second surface,
• a plurality of stacked insulating layers including a first insulating layer and a second insulating layer, wherein a surface of the first insulating layer contacts a surface of the second insulating layer,
• a plurality of output terminals distributed on the second surface forming the same matrix pattern as the plurality of actuator terminals, and
• a plurality of wirings connecting the driver IC and the output terminals, wherein a first portion of the wirings are formed on the surfaces of the plurality of stacked insulating layers and wherein a second portion of the wirings pass through the plurality of stacked insulating layers of the sheet from the first surface to the second surface,
• wherein a third portion of the wirings connected to the output terminals at a first row of the matrix pattern is formed on a surface of the first insulating layer, and
• wherein a fourth portion of the wirings connected to the output terminals at a second row of the matrix pattern is formed on a surface of the second insulating layer.