Patent ID: 10081181

Abstract:
A liquid ejecting head includes a pressure chamber formation substrate provided with pressure chambers that are disposed side by side and that communicate with nozzles that discharge a liquid, a nozzle plate provided with the nozzles, and a flow path formation substrate provided between the pressure chamber formation substrate and the nozzle plate. The flow path formation substrate has a plurality of individual communication paths that supply the liquid to the pressure chambers disposed side by side, a common liquid chamber that communicates with the pressure chambers, a liquid introduction port that introduces the liquid into the common liquid chamber, and a flow path of the liquid from the liquid introduction port toward the individual communication paths. The flow path formation substrate has a thick wall portion and a thin wall portion that are located at a pressure chamber formation substrate side of the common liquid chamber and that have a relatively large substrate thickness and a relatively small substrate thickness, respectively. The thick wall portion causes area of a cross-section of the flow path taken along a thickness direction of the flow path formation substrate to be smaller at an individual communication path side than at a liquid introduction port side. The thick wall portion includes a first inclined portion that, in a plan view from the nozzle plate side, is inclined from the liquid introduction port side toward at least one end side of two end sides of the plurality of individual communication paths in a side-by-side direction in which the pressure chambers are provided side by side and along which the individual communication paths are provided.