Patent ID: 8052251

Claim:
An ink jet recording head comprising: an element substrate; a plurality of ejection outlets, provided on said element substrate, for ejecting ink in a direction perpendicular to said element substrate; a nozzle formation member having a plurality of ink flow paths which are in fluid communication with said ejection outlets, respectively; an ink supply port, formed through said element substrate, for supplying the ink to said ink flow paths, and filter members provided between said ink supply port and an ink supply port side end of said ink flow paths, wherein said ink flow paths are arranged at a density higher than 1200 dpi in an arranging direction of said ejection outlets, wherein widths of flow passage walls forming said ink flow paths are smaller than heights of said ink flow paths and widths of said ink flow paths are smaller than the heights of said ink flow paths, and wherein each of said filter members has a width larger than the widths of said flow passage walls.