A mask used in production procedure of an electronic product, the electronic product comprising a substrate to be coated, the mask comprising: a support and a mask strip mounted on the support , wherein the support comprises a main body and two side portions provided on opposite sides of the main body , the main body comprises the first main surface and a second main surface opposite to each other, each side portion comprises a third outer surface , characterized in that the mask strip comprising at least two connecting portions each connected with the support , and a pattern portion located between the at least two connecting portions , the pattern portion comprising a first outer surface , and the connecting portion comprising a second outer surface ; wherein the first outer surface and the second outer surface are non-coplanar with each other, wherein the included angle (Q) between the second outer surface and the first outer surface is greater than 180 degrees and less than 270 degrees, the third outer surface of the side portion is in two-stair-step shape and comprises a first sub-surface , a second sub-surface , a third sub-surface and a fourth sub-surface which are sequentially connected, the first sub-surface is connected with a first main surface of the main body , the first sub-surface and the first main surface of the main body intersect with each other to form a first boundary, and the third sub-surface and the fourth sub-surface intersect with each other to form a second boundary; an included angle (c) between a plane defined by the first boundary and the second boundary and the fourth sub-surface is greater than an included angle (b) between the third sub-surface and the fourth sub-surface , and the second outer surface is fixed onto the third sub-surface . a support and a mask strip mounted on the support , wherein the support comprises a main body and two side portions provided on opposite sides of the main body , the main body comprises the first main surface and a second main surface opposite to each other, each side portion comprises a third outer surface , characterized in that the mask strip comprising at least two connecting portions each connected with the support , and a pattern portion located between the at least two connecting portions , the pattern portion comprising a first outer surface , and the connecting portion comprising a second outer surface ; wherein the first outer surface and the second outer surface are non-coplanar with each other, wherein the included angle (Q) between the second outer surface and the first outer surface is greater than 180 degrees and less than 270 degrees, the third outer surface of the side portion is in two-stair-step shape and comprises a first sub-surface , a second sub-surface , a third sub-surface and a fourth sub-surface which are sequentially connected, the first sub-surface is connected with a first main surface of the main body , the first sub-surface and the first main surface of the main body intersect with each other to form a first boundary, and the third sub-surface and the fourth sub-surface intersect with each other to form a second boundary; an included angle (c) between a plane defined by the first boundary and the second boundary and the fourth sub-surface is greater than an included angle (b) between the third sub-surface and the fourth sub-surface , and the second outer surface is fixed onto the third sub-surface . <EOS>