Patent ID: 7690768
Filing Date: 2010-04-06
Classification: B41J

Abstract:
1. A liquid ejecting head comprising a plurality of liquid ejecting portions arrayed in a flat region on a substrate, the liquid ejecting portions each including: a liquid chamber that accommodates liquid to be ejected; a heater element arranged in the liquid chamber, the heater element generating bubbles in liquid in the liquid chamber when heated; and a nozzle for ejecting liquid in the liquid chamber in accordance with generation of bubbles by the heater element, wherein of a plurality of the heater elements, the center of the heater element located at the M-th position (M is either an odd number or even number) as counted from one end side is arranged on a straight line L the liquid chamber is formed in a substantially recessed configuration in plan view so as to surround three sides of the heater element, a plurality of the heater elements are arrayed at a constant pitch P in the directions of the straight line L the liquid chamber that surrounds the heater element arranged on the straight line L a gap Wx (Wx is a real number larger than 0) is formed at least one of between the liquid chambers that are arrayed on the straight line L a gap Wy (Wy is a real number larger than 0, where Wy>Wx) is formed between the liquid chamber arrayed on the straight line L a liquid channel having a width equal to the gap Wx, and a liquid channel having a width equal to the gap Wy are formed by the gap Wx and the gap Wy, respectively.