Patent ID: 8047632
Filing Date: 2011-11-01
Classification: B41J

Abstract:
1. An ink jet recording head comprising: a plurality of ejection outlets for ejecting ink; a plurality of energy generating elements, provided on a silicon substrate, for generating energy for ejecting the ink from said ejection outlets; a plurality of ink flow passages, provided correspondingly to said energy generating elements, communicating with said ejection outlets; a through-hole passing through the silicon substrate, wherein said through-hole extends from one longitudinal end side to the other longitudinal end side of the silicon substrate and supplies the ink to said plurality of ink flow passages; and an ink supply port for supplying the ink supplied into said through-hole to said ink flow passages, wherein said ink supply port is provided correspondingly to said through-hole and extends from the one longitudinal end side to the other end side of the silicon substrate, wherein said ink supply port is formed with an extended member which contacts a bottom of a wall constituting said plurality of ink flow passages and extends into an opening of said through-hole, and wherein the wall partitions said plurality of ink flow passages and extends in a direction crossing a direction in which said ink supply port extends.