Patent ID: 9557638
Date: 2017-01-31
CPC Classifications: G03F

Claim:
1. A method for manufacturing a mask, comprising the following steps: (1) providing a partially finished mask, wherein the partially finished mask is made of a material and comprises a plurality of effective open areas each of which comprises vapor deposition apertures formed therein in such a manner that the vapor deposition apertures are spaced from each other and extend, in a given direction, through a first part of the material of the partially finished mask that constitutes the effective open area to form hollow openings extending through the first part of the material for allowing a deposition material to pass therethrough and ineffective areas located around the effective open areas and comprising a second part of the material such that solid portions of the second part of the material are respectively located adjacent to the effective open areas; and (2) applying an etching process to partially remove the solid portions so as to form recesses in the ineffective areas, wherein the partial removal of the solid portions is such that the ineffective areas that have the same surface area as that of the effective open areas are made to have substantially the same mass as that of the effective open areas.