Patent ID: 9162449
Filing Date: 2015-10-20
Classification: B05B,B41J

Abstract:
1. An apparatus for spraying and patterning, using an electrostatic force, comprising: a nozzle to which a voltage is applied to exhaust ink; a droplet circulation chamber connected to one end of the nozzle, with a hole provided in one end to spray the ink exhausted from the nozzle based on a particle size of the droplet and to temporarily collect the not-sprayed ink; and a substrate for impacting the ink sprayed from the hole thereon by forming an electric field between the nozzle and the substrate; a mask arranged between the droplet circulation chamber and the substrate, with a penetrated portion for adjusting a region where the ink is impacted, the mask to which a voltage is applied to focus an electric field in the penetrated portion; an ink supply unit for holding the ink, the ink supply unit being connected to the nozzle to supply the ink; and a circulation pipe having one end connected to the droplet circulation chamber and the other end connected to the ink supply unit, to circulate the ink held in the droplet circulation chamber to the ink supply unit, wherein a voltage smaller than a voltage applied to the nozzle and larger than a voltage applied to the substrate is applied to the mask to spray the ink to the penetrated portion.