Patent ID: 9553007
Date: 2017-01-24
CPC Classifications: H01L

Claim:
1. A coating method comprising: a step of forming a film of a coating solution over an entire surface of a substrate, the film having a larger thickness in a central region of the substrate than in an edge region of the substrate by discharging droplets of the coating solution from a plurality of nozzles formed on an inkjet head to the substrate; and a step of moving the coating solution in the film from the central region toward the edge region of the substrate by rotating the substrate without discharging the droplets from the inkjet head, wherein the step of forming the film includes: a first discharging step of discharging the droplets from the inkjet head with the inkjet head disposed at a first position while rotating the substrate, to form a circular first film having a first thickness in the central region of the substrate, and a second discharging step of discharging the droplets from the inkjet head with the inkjet head disposed at a second position while rotating the substrate, to form an annular second film having a second thickness adjoining a periphery of the first film, the second thickness being smaller than the first thickness; and wherein the step of forming the film includes moving the inkjet head without rotating the substrate and without discharging the droplets from the inkjet head between the first and second discharging steps; and wherein the step of forming the film adjusts a discharge quantity of the inkjet head to allow the discharge quantity per unit area in the central region of the substrate to be larger than that in the edge region of the substrate.