Patent ID: 7065874
Filing Date: 2006-06-27
Classification: B41J,Y10T

Abstract:
1. A method for making a liquid ejection head comprising a plurality of ejection ports, a liquid passage having a plurality of pressure chambers communicating with the plurality of ejection ports, and a plurality of piezoelectric elements corresponding to the plurality of pressure chambers with isolated pressure-transmitting portions between the corresponding piezoelectric elements and pressure chambers, respectively, the plurality of piezoelectric elements being arranged in a comb shape, the method comprising the steps of: (a) filling the spaces between the piezoelectric elements with a filler; (b) forming a pressure-transmitting layer for forming the isolated pressure-transmitting portions on a planar surface including ends of the plurality of piezoelectric elements; (c) placing a diaphragm on the pressure-transmitting layer and forming a pattern for the liquid passage on the diaphragm; (d) forming a coating layer on the pattern for the liquid passage; (e) removing the pattern for the liquid passage to form the plurality of pressure chambers; and (f) removing the pressure-transmitting layer except for the portions corresponding to the plurality of pressure chambers, to form the isolated pressure-transmitting portions.