Method for manufacturing an ink jet head in which droplets of conductive ink are expelled

A method for manufacturing an ink jet head in which droplets of conductive ink are expelled, comprising the steps of:

• attaching a mask on a portion of a first insulating film;
• adding a pair of electrodes facing each other through an opening on the remaining portion of the first insulating film by an electro-plating process before removing the mask;
• attaching a second transparent insulating film on the added electrodes and the first insulating film so that the electrodes are located between the first insulating film and the second transparent insulating film and the opening is occupied with the second transparent insulating film;
• excavating both the first insulating film and the second transparent insulating film with a beam of light radiated from above the second transparent insulating film to form an expelling nozzle penetrating both the first insulating film and the second transparent insulating film, the opening occupied with the second transparent insulating film being excavated to project the electrodes into the expelling nozzle;
• attaching an ink holding cap to the first insulating film to hold conductive ink in a hollow portion thereof;
• and
• connecting electrical leads to the electrodes for applying a voltage generated in a voltage generator to the electrodes.

A method for manufacturing an ink jet head in which droplets of conductive ink are expelled, comprising the steps of:

• attaching a conductive metal film on a first insulating film;
• etching the conductive metal film to produce a pair of etched electrodes with an opening being positioned between the etched electrodes;
• attaching a second insulating film on the etched electrodes and the first insulating film so that the etched electrodes are between the first insulating film and the second insulating film and the opening is occupied with the second insulating film;
• excavating both the first insulating film and the second insulating film with a beam of light to form both an expelling nozzle penetrating the second insulating film through the opening and an ink passageway penetrating the first insulating film, the etched electrodes projecting into the expelling nozzle and the ink passageway communicating with the expelling nozzle;
• attaching an ink holding cap to the first insulating film to hold conductive ink in a hollow portion thereof;
• and
• electrically connecting the etched electrodes with a voltage generator through electrical leads for applying a voltage generated in the voltage generator to the etched electrodes.

A method for manufacturing an ink jet head in which droplets of conductive ink are expelled, comprising the steps of:

• attaching a conductive metal film on a first insulating film;
• etching the conductive metal film to produce a pair of etched electrodes with an opening positioned between the etched electrodes;
• attaching a second transparent insulating film on the etched electrodes and the first insulating film so that the etched electrodes are between the first insulating film and the second transparent insulating film and the opening is occupied with the second transparent insulating film;
• excavating both the first insulating film and the second transparent insulating film with a beam of light to form both an expelling nozzle penetrating the second transparent insulating film through the opening and an ink passageway penetrating the first insulating film, the etched electrodes projecting into the expelling nozzle and the ink passageway communicating with the expelling nozzle;
• and
• electrically connecting the etched electrodes with a voltage generator through electrical leads for applying a voltage generated in the voltage generator to the etched electrodes.