Patent ID: 7700482
Filing Date: 2010-04-20
Classification: G11B,H01L,Y10S

Abstract:
1. A method of forming a patterned material layer, the method comprising: a resist layer forming step of forming a resist layer on a substrate, the resist layer having a first photosensitive resin layer of a certain thickness, an intermediate resin layer of a certain thickness that is soluble in a developing solution, and a second photosensitive resin layer which are laminated in this order; an exposing step of exposing the resist layer to light in a predetermined pattern; a developing step of partly removing the resist layer so as to form a trench exposing the substrate and partly removing the intermediate resin layer so as to form a groove on a side face of the trench, thereby forming by one dissolution into the developing solution a resist frame that includes a portion of the first photosensitive resin layer, a portion of the intermediate resin layer, and a portion of the second photosensitive resin layer; a vacuum coating step of forming a vacuum coating layer having a material pattern part covering the exposed part of the substrate and a part to lift off covering the resist frame by a vacuum coating process, the vacuum coating layer having a thickness that is thinner than the thickness of the first photosensitive resin layer; and a liftoff step of removing the part to lift off in the vacuum coating layer together with the resist frame, so as to yield a patterned material layer.