Display panel, mask, method for manufacturing display panel, and display device

A method for manufacturing a display panel, comprising:

• providing a substrate and at least one mask, wherein the substrate has a first region and a second region, a projection of the first region on a plane of the substrate does not overlap with a projection of the second region on the plane of the substrate, the first region and the second region each extend from an edge of the substrate into the substrate, each of the at least one mask comprises an aperture portion and a shielding portion, and the at least one shielding portion extends from an edge of the mask into the mask;
• and
• forming a functional layer on a side of the substrate sequentially by vapor deposition through the aperture portion of the at least one mask, wherein the functional layer comprises a first functional portion, a second functional portion, and an uneven portion, and the first functional portion and the second functional portion are respectively located on two sides of the uneven portion,
• wherein the first functional portion covers the second region, the second functional portion covers the first region, and the first functional portion and the second functional portion are arranged in a same layer.