Patent ID: 7494206
Filing Date: 2009-02-24
Classification: B41J

Abstract:
1. A liquid ejection head comprising: a flow path forming substrate having a first surface and a second surface opposite to each other and formed with a space, including a liquid reserving chamber and pressure generating chambers, the liquid reserving chamber being so formed as to communicate with each of the pressure generating chambers and to penetrate from the first surface to the second surface; a nozzle plate, stacked on the first surface and provided with nozzle openings each of which is communicated with one of the pressure chambers; and a sealing plate, stacked on the second surface and adapted to seal the space, wherein a step is formed on an inner wall of the liquid reserving chamber, wherein the inner wall is perpendicular to an ejection surface of the nozzle plate, and wherein the step is formed such that a first portion of the inner wall, which is closer to the nozzle plate than the sealing plate, is projected with respect to a second portion of the inner wall, which is closer to the sealing plate than the nozzle plate.