Method of producing an inkjet printhead for an inkjet printer with a print engine controller
View Patent ↗A method of fabricating a plurality of inkjet nozzles on a substrate. The method comprises the steps of: (a) providing a substrate having a plurality of trenches corresponding to ink inlets; (b) depositing sacrificial material so as fill the trenches and form a scaffold on the substrate; (c) defining openings in the sacrificial material; (d) depositing roof material over the sacrificial material to form nozzle chambers and filter structures simultaneously; (e) etching nozzle apertures through the roof material; and (f) removing the sacrificial material.
1. A method of producing a printhead for an inkjet printer with a print engine controller for controlling the printhead operation, the method comprising the steps of:
providing a printhead integrated circuit having an array of ink ejection nozzles formed on a substrate;
providing circuitry for electrical connection to the print engine controller;
providing a support member for supporting the printhead integrated circuit and the circuitry within the printer;
providing a thermoplastic polymer sealing film;
securing the polymer film to a surface of the support member by applying heat and pressure thereto for a predetermined time;
mounting the printhead integrated circuit and the circuitry to the support member via the polymer film; and,
electrically connecting the circuitry to the printhead integrated circuit; wherein,
the support member has a plurality of ink feed conduits for establishing fluid communication with at least one ink storage compartment; and,
the polymer film is attached to the support member between the ink feed conduits and the printhead integrated circuits, the polymer film having an array of apertures such that the ejection nozzles are in fluid communication with the ink feed conduits.
2. A method according to claim 1 wherein the circuitry is a flexible printed circuit board with tracks of conductive material in layers of polyimide film, and the printhead integrated circuit and the flexible printed circuit board are simultaneously attached to the support member via the polymer film.
3. A method according to claim 1 wherein the circuitry is a flexible printed circuit board with tracks of conductive material in layers of polyimide film, and the flexible printed circuit board is attached to the polymer film after the printhead integrated circuit is attached.
4. A method according to claim 3 wherein the flexible printed circuit board has an adhesive area for attachment to the polymer film once the polymer film has cooled and hardened after the printhead integrated circuit attachment process.
5. A method according to claim 1 wherein the circuitry is tracks of conductive material laid within the polymer film.
6. A method according to claim 1 wherein the polymer film is more than 25 microns thick.
7. A method according to claim 6 wherein the polymer film is about 50 microns thick.
8. A method according to claim 1 wherein the array of apertures is an array of laser drilled holes in registration with respective ends of the ink feed conduits.
9. A method according to claim 1 wherein the polymer sealing film is a laminate with an adhesive layer on both sides of a thermoplastic film.
10. A method according to claim 9 wherein the thermoplastic film is a polyethylene terephthalate or polysulphone.
11. A method according to claim 1 wherein the ink feed conduits are formed in a liquid crystal polymer micro molding.