Patent ID: 7537868

Claim:
A method of manufacturing color filters using a first mixed gas, which contains a fluorine-based gas and oxygen gas, and a second mixed gas, which contains nitrogen gas and oxygen gas, comprising: a stopper layer forming step of forming, on a support, a stopper layer whose etching rate by the second mixed gas is low; a colored layer forming step of forming a colored layer on the stopper layer; a photo resist layer forming step of forming a photo resist layer on the colored layer; an image forming step of forming an image on the colored layer by removing the photo resist layer according to a pattern; a first etching step of removing, by dry etching process using the first mixed gas, a part of the colored layer to the extent that the stopper layer is not exposed so as to form a colored-layer removed portion according to the pattern formed in the image forming step; a second etching step of removing, after the first etching step, the colored-layer removed portion by dry etching process using the second mixed gas so as to form a stopper-layer exposed portion according to the pattern; and a photo resist layer removing step of removing the photo resist layer remaining after the second etching step.