Abstract: A metal mask in which deformation and breakage are less likely to occur at a boundary portion, and a method for manufacturing the metal mask are provided. The metal mask includes an effective region, a peripheral region, and a dummy region. The effective region includes a first through-hole and a first top part. The first top part has a height H1. The peripheral region is positioned around the effective region. The dummy region is positioned between the effective region and the peripheral region. The dummy region includes a second top part. The second top part has a height H2. The height H2 is greater than the height H1.

Abstract: A metal mask in which shadow is less likely to occur while the strength is kept, and a method for manufacturing the metal mask are provided. The metal mask includes a first surface, and a second surface positioned opposite to the first surface. The first surface has through-holes, a first top part, and a second top part. The through-holes have a first through-hole, a second through-hole, a third through-hole, a fourth through-hole, a fifth through-hole, and a sixth through-hole. The first through-hole has a first short axis and a first long axis. The second through-hole has a second short axis and a second long axis. The third through-hole has a third short axis and a third long axis. The fourth through-hole has a fourth short axis and a fourth long axis. The fifth through-hole has a fifth short axis and a fifth long axis.

Abstract: A metal mask in which shadow is less likely to occur while the strength is kept, and a method for manufacturing the metal mask are provided. The metal mask includes a first surface, and a second surface positioned opposite to the first surface. The first surface has through-holes, a first top part, and a second top part. The through-holes have a first through-hole, a second through-hole, a third through-hole, a fourth through-hole, a fifth through-hole, and a sixth through-hole. The first through-hole has a first short axis and a first long axis. The second through-hole has a second short axis and a second long axis. The third through-hole has a third short axis and a third long axis. The fourth through-hole has a fourth short axis and a fourth long axis. The fifth through-hole has a fifth short axis and a fifth long axis.

Abstract: A deposition mask includes a metal plate including first and second surfaces located opposite each other, through holes bored through the metal plate from the first surface to the second surface, and a flat region located between two through holes adjacent to each other in a case where the deposition mask is seen from the second surface side. The through holes are arrayed in a staggered arrangement in first and second directions in planar view. The flat region includes first and second flat regions located at first and second sides, respectively, of a first center line. The first center line passes through center points of two through holes adjacent to each other in the first direction. The first and second flat regions include portions in which dimensions of the first and second flat regions in the first direction increase away from the first center line, respectively.

Abstract: In a shadow mask 201, a large number of slots 2 are made in a mask body 201a in the horizontal direction X and in the vertical direction Y. Each slot 2 has a roughly rectangular backside opening 21 and a roughly rectangular front-side opening 22 that are made by an etching process, and a through-hole 11 that connects these two openings.