A metal coated substrate with improved resistivity to cyclic temperature stress is provided. A metal layers is attached to an insulating layer having a thickness of 0.2 mm. The metal layer is formed in a border area and is weakened by openings disposed in two rows. The depth of the openings nearer the border are greater than the depth of the openings in the tow farther from the border. The distance between the bottoms of the openings in the first row and the insulating layer is less than 1/3 of the thickness of the metal layer, and the distance between the bottom of the second row of openings and the surface of the insulating layer is 1/3 to 1/2 the thickness of the metal layer.