Patent ID: 8138094

Claim:
A method for manufacturing a mask, comprising: forming a second mask layer and a first mask layer in this order on a first film; patterning the first and second mask layers to form openings in the first and second mask layers; enlarging diameters of the openings in the second mask layer so that the diameters of the openings in the second mask layer become larger than diameters of the openings in the first mask layer; depositing mask material into the openings in the first and second mask layers so that cavities are formed within the openings in the second mask layer; etching back the first mask layer and the mask material so that the second mask layer remains, to remove the first mask layer and to expose the cavities in the second mask layer; and removing the mask material from bottom surfaces of the cavities in a thickness direction of the mask material until the first film is exposed, to form a mask which includes the second mask layer and the mask material and has the openings including the cavities on the first film.