Patent ID: 8171876
Filing Date: 2012-05-08
Classification: B41J,G02F,Y10T

Abstract:
1. An applicator for allowing dispersion liquid of which solid microparticles are dispersed to be applied at a desired position on a substrate by relatively moving a head module and the substrate, comprising: a head module for applying a liquid on a substrate; first and a second circulation tanks placed outside the head module; a buffer tank provided in the head module; a discharge chamber having an inlet connected to the buffer tank; a main line provided between the first and second circulation tanks and the buffer tank; a return line provided between an outlet of the discharge chamber and the first and second circulation tanks; a feed valve provided on the main line for connecting at least one of the first and second circulation tanks to the buffer tank; and a return valve provided on the return line for connecting at least one of the first and second circulation tanks to the head module, wherein the first and second circulation tanks and the buffer tank are hermetically sealed and the pressure of the space above the dispersion liquid placed in each of the tanks can be controlled, and further comprising a vacuum pump and a gas feeding system connected to the buffer tank in order to control the pressure of a space above the liquid level of the dispersion liquid in the buffer tank.