Patent ID: 7445318
Filing Date: 2008-11-04
Classification: B41J,Y10T

Abstract:
1. A method of manufacturing a liquid droplet ejection head including nozzles that eject liquid droplets, pressure chambers that are communicated with the nozzles and filled with a liquid, a diaphragm that configures part of the pressure chambers, a pool chamber that pools the liquid supplied to the pressure chambers via flow paths, and piezoelectric elements that cause the diaphragm to be displaced, the method comprising: disposing the diaphragm on a support substrate; disposing plural non-through holes in an undersurface of the support substrate; forming a boundary separation layer on an upper surface of the support substrate, the diaphragm being formed on the boundary separation layer, and patterning the undersurface of the support substrate to make the non-through holes into through holes; disposing the through holes in a tapered manner so that their cross-sectional area is reduced from an injection port side for injecting a solvent towards the diaphragm side; disposing the piezoelectric elements on the diaphragm; disposing a top plate including wirings on the diaphragm; and removing the support substrate from the diaphragm to form a piezoelectric element substrate and joining a flow path substrate, in which the pressure chambers are formed, to the piezoelectric element substrate.