Patent ID: 7766460

Claim:
A liquid-droplet jetting apparatus which jets liquid droplets of a liquid, the apparatus comprising a channel unit having a common liquid chamber which extends in a predetermined direction, a first individual liquid channel which is from a first connecting port to the common liquid chamber and up to a first jetting port via a pressure chamber, and a second individual liquid channel which is from a second connecting port to the common liquid chamber up to a second jetting port; wherein the pressure chamber is formed as a plurality of pressure chambers arranged in a row along the common liquid chamber to form a pressure-chamber surface; the common liquid chamber includes an upper wall surface which extends in the predetermined direction, a lower wall surface which is separated from the upper wall surface in a direction orthogonal to the pressure-chamber surface and which faces the upper wall surface, and a step-surface which extends from the upper wall surface so as to intersect the pressure-chamber surface; the step-surface partitions the common liquid chamber into a first area with which the first individual liquid channel communicates, and a second area with which the second individual liquid channel communicates; and with respect to the direction orthogonal to the pressure-chamber surface, a distance between the pressure-chamber surface and a step-surface farthest portion, of the step-surface, which is disposed farthest from the pressure-chamber surface is greater than a distance between the second connecting port and the pressure-chamber surface; and an upper wall surface of the second area is separated from the second connecting port.