Ink jet recording head, its fabricating method and ink jet recording apparatus

摘要

An object of the present invention is to provide an ink jet recording head which can compensate for shortage of mechanical strength of an ink reservoir (5) by preventing the piezoelectric film (3) on an ink reservoir from cracking or being broken due to the vibration of a piezoelectric film (3) or flowing or mechanical vibration of ink. The ink reservoir (5) has at least two plane orientations at its bottom and is given different depths.