Patent ID: 7198676

Claim:
A device manufacturing apparatus comprising an inkjet device including a pressure generation chamber having a variable internal volume and a Helmholtz resonance frequency of a period TH, the device manufacturing apparatus comprising: a nozzle opening connected with an inside of the pressure generation chamber; a driving unit that causes the pressure generation chamber to expand and contract; a control unit that generates a predetermined driving signal to the driving unit, the control unit generating: a first signal element to cause the pressure generation chamber to expand; a second signal element to cause the expanded pressure generation chamber to contract in order to eject a liquid material in the pressure generation chamber as a droplet from the nozzle opening; a third signal element to cause the pressure generation chamber to expand to a state, which is held before the first signal element is output and after the ejection of the droplet, a first time which elapses between the beginning of output of the first signal element and the beginning of output of the second signal element being set so as to be substantially equivalent to the period TH, a second time which elapses between the beginning of output of the second signal element and the beginning of output of the third signal element being set so as to be substantially equivalent to the period TH, and a sum of an amplitude of the first signal element and an amplitude of the third signal element being set so as to be substantially equivalent to an amplitude of the second signal element; a stage that supports a substrate onto which the droplet is ejected; a first shifter that moveably supports the stage; and a second shifter that moveably supports the inkjet device, and is capable of rotating the inkjet device around a lateral direction of a base that supports the first shifter, and around a direction along a portion between a front portion and a back portion of the base.