Patent ID: 8342656

Claim:
A liquid ejecting head comprising: a fluid channel formation substrate that is made of a silicon single crystal substrate having a crystal face orientation of (110), the fluid channel formation substrate having a plurality of separate flow channels that include at least pressure generation chambers demarcated by a row of partition walls, each of the pressure generation chambers being in communication with a nozzle opening that ejects liquid drops, and the fluid channel formation substrate further having a communication portion that is in communication with each of the separate flow channels; and a pressure generation section that is provided so as to correspond to each of the pressure generation chambers, the pressure generation section generating a pressure change in the pressure generation chambers so as to cause ejection of liquid drops, wherein the tip surface at the communication portion side of each of the partition walls has a gradual diminution portion formed thereon, the gradual diminution portion being, in the thickness direction perpendicular to the row of the partition walls, slanted downward toward the communication portion, and the gradual diminution portion having an angle of gradient that gradually decreases toward one end portion of the partition wall, wherein the each of the gradual diminution portions is configured as a plurality of surfaces.