Rounded corner triangle graphical substrate

The present invention relates to a rounded corner triangle graphical substrate. The rounded corner triangle graphical substrate comprises a substrate, periodization projections or depressed graphs are arranged around the surface of the substrate, the bottom edges of the projections or depressed graphs are rounded corner triangles and are closely arranged, namely the perpendicular bisector of any one edge of each arranged rounded corner triangle passes through the centers of the rounded corner triangle and the corresponding adjacent rounded corner triangle, there are gaps between adjacent rounded corner triangles, and any one edges of the arranged rounded corner triangles are axially symmetrical with the corresponding edges of the adjacent rounded corner triangle about the gap. The any one edge of the rounded corner triangle of the bottom edge is axially symmetrical with the corresponding edge of the adjacent rounded corner triangle, the rounded corner triangle graphical substrate has bigger figure gaps in the condition of keeping invariant duty ratio and compact arrangement so as to widen the epitaxial technical window and improve the product yield rate and reliability; and moreover, the rounded corner triangle is a traditional sharp-corner triangle to effectively prompt the dislocation bending and mutual annihilation in the epitaxial layers grown on the rounded corner triangle so as to improve the crystal quality of the epitaxial layers.