Mask and method of manufacturing the same

A mask comprising:

• a mask sheet provided with a plurality of open areas defined therein in a plan view;
• and
• a mask frame which supports the mask sheet, the mask sheet comprising:
• a first surface that is configured to be in contact with a target substrate;
• and
• a second surface disposed above the first surface and defining the open areas,
• wherein the second surface is an inclined surface inclined downward with respect to a first direction, and the first direction is parallel to a plane in which the first surface is included.

A method of manufacturing a mask, comprising:

• forming a mask sheet;
• tensioning the mask sheet;
• and
• coupling the mask sheet to a mask frame, the forming of the mask sheet comprising:
• preparing a preliminary mask sheet;
• and
• irradiating a laser beam onto the preliminary mask sheet to form a plurality of open areas,
• wherein the open areas are defined by an inner side surface of the mask sheet, and the inner side surface is an inclined surface with respect to a major surface plane of the mask sheet.

A mask comprising:

• a mask sheet provided with a plurality of open areas to stack a plurality of thin film layers of a same material on a target substrate;
• and
• a mask frame which supports the mask sheet, the mask sheet comprising:
• a first portion comprising a first surface, wherein the first surface is configured to be in contact with the target substrate;
• and
• a second portion disposed on the first portion, extending from a top of the first portion in a first direction and comprising a second surface defining the open areas,
• wherein the second surface is an inclined surface inclined downward with respect to the first direction, the first direction is parallel to a plane in which the first surface is included, and the inclined surface has an inclination angle from about 30 degrees to about 70 degrees.