Patent ID: 6410080
Filing Date: 2002-06-25
Classification: B05D,G03F,H01L

Abstract:
A liquid film forming method of dropping a liquid from a dropping nozzle or dropping nozzles of a dropping unit onto a substrate to be processed, and then providing relative movement between the dropping unit and the substrate while keeping the liquid dropping on the substrate, so as to form a liquid film on the substrate,wherein the relative movement between the dropping unit and the substrate is composed of straight movement along a file direction in which the dropping unit passes from one end side of the substrate over the substrate to the other end side of the substrate, and movement along a rank direction perpendicular to the file direction outside the substrate at a pitch p, the movement along the file direction contains movement of a constant speed of v in a section where the dropping nozzle passes over the substrate, and movement of an acceleration of a or âˆ’a in the section where the dropping nozzle passes over an outside area of the substrate; wherein a dropping amount W of the liquid dropped from the nozzle, where W is measured in volume/time, is proportional to the movement of a constant speed v; and wherein the movement of constant speed v along the file direction is represented by the formula v=((L)(a)/2)1/2 where (L) is a length of the section in the file direction of the substrate over which the nozzle passes at the constant speed, and (a) is the absolute value of acceleration.