Patent ID: 6419347
Filing Date: 2002-07-16
Classification: B41J

Abstract:
A liquid eject head comprising:a substrate having a plurality of eject energy generating elements for ejecting liquid droplets, a plurality of micro processed portions including said eject energy generating elements, and a first surface on which the plurality of said micro processed portions are arranged, and a grooved plate having a plurality of eject ports for ejecting said liquid droplets, a plurality of grooves communicating to a plurality of said respective eject ports for forming liquid paths, and a second surface on which the plurality of said grooves are arranged, wherein; said first surface and second surface are fitted together so as to keep a state where said respective eject energy generating elements face against corresponding said grooves, said substrate has at least two protrusions; a width of the protrusions in an arranged direction of said liquid paths being set larger than the width of said liquid path and, a height of the protrusions from said first surface being set higher than a height of said micro processed portions, and said grooved plate has engaging recessed portions for positioning said grooved plate against said substrate by engaging said protrusions with said engaging recessed portions, and a summed up height comprising a height of a wall of said engaging recessed portions from a ceiling of said liquid path and said height of said protrusions, is set larger than a height of partition walls parting said liquid paths from the ceiling of said liquid path.