Patent ID: 6955993

Claim:
A mask comprising: a support frame; a thin film formed thinner than said support frame and surrounded by said support frame; a first sub-region of a plurality of sub-regions obtained by dividing said thin film by a plurality of lines including a first line passing through a reference point consisting of one point on said thin film and extending in a first direction and a second line orthogonal to the first line at the reference point and extending in a second direction; a second sub-region adjacent to said first sub-region in the first direction; a third sub-region adjacent to said first sub-region in the second direction; a fourth sub-region adjacent to said second sub-region in the second direction and adjacent to said third sub-region in the first direction; a first group of grid lines comprised of at least one grid line extending on said first sub-region in the second direction and having one end connected to one of a third group of grid lines to reinforce said thin film, said first group of grid lines including a grid line contacting the second line; a second group of grid lines comprised of at least one grid line extending on said second sub-region in the first direction and having one end connected to one of said first group of grid lines to reinforce said thin film, said second group of grid lines including a grid line contacting the first line; said third group of grid lines comprised of at least one grid line extending on said third sub-region in the first direction and having one end connected to one of a fourth group of grid lines to reinforce said thin film, said third group of grid lines including a grid line contacting the first line; said fourth group of grid lines comprised of at least one grid line extending on said fourth sub-region in the second direction and having one end connected to one of said second group of grid lines to reinforce said thin film, said fourth group of grid lines including a grid line contacting the second line; a first aperture formed at a portion that is not located at the grid lines in the first sub-region; and a second aperture formed at a portion that is not located at the grid lines in at least one sub-region of the second to fourth sub-regions, wherein the first to fourth sub-regions are divided into a plurality of chip transfer regions the same in shape and size by at least one first division line parallel to the first line and at least one second division line parallel to the second line.