Mask plate and mask sheet

A mask plate, comprising:

• a first mask sheet, comprising a first mask area located in a middle region of the first mask sheet and first peripheral areas located on both sides of the first mask area in a first direction, a thickness of the first mask area is less than a thickness of the first peripheral areas to form a first concave portion corresponding to the first mask area, in a plane where the first mask area is located and in a direction perpendicular to the first direction, a size of the first mask area is equal to a size of the first mask sheet;
• and
• a second mask sheet, comprising a second mask area located in a middle region of the second mask sheet and second peripheral areas located on both sides of the second mask area in a second direction, a thickness of the second mask area is less than a thickness of the second peripheral areas to form a second concave portion corresponding to the second mask area, in a plane where the second mask area is located and in a direction perpendicular to the second direction, a size of the second mask area is equal to a size of the second mask sheet,
• wherein the first direction intersects the second direction, and a surface of the first mask area facing the first concave portion and a surface of the second mask area facing the second concave portion are attached facing each other.