Patent ID: 7237877

Claim:
A droplet discharging device comprising: a first substrate comprising a plurality of reservoir chambers for holding a liquid; a second substrate comprising a plurality of discharge units comprising supply openings for receiving a supply of the liquid stored in said reservoir chambers, pressurizing chambers for applying a pressure to the liquid supplied from said supply openings, and discharge openings for discharging the liquid pressurized in the pressurizing chambers to the outside; and a third substrate sandwiched between said first substrate and said second substrate and comprising channels for connecting said plurality of reservoir chambers with said plurality of supply openings corresponding thereto, wherein the plurality of supply openings provided in said second substrate are arranged such that the relative positions thereof have a zigzag disposition, wherein said second substrate comprises an electrode substrate having electrodes on the surface, a pressurizing chamber substrate disposed via a small gap opposite said electrode substrate and comprising pressurizing chambers with a pressure inside thereof adjusted by the displacement of diaphragms oscillating under the effect of an electrostatic force induced by said electrodes, and a nozzle substrate disposed on the opposite side of said pressurizing chamber substrate and having nozzle holes for discharging said liquid filling said pressurizing chambers to the outside.