SPUTTERING TARGET

摘要

Objects of the present invention consist in achievement of both of elongation of life of a sputtering target as well as uniformity of a thickness of a resulting thin coating layer formed on a substrate during the period. The present invention provides a sputtering target comprising a target material, which is characterized in that the target material has a sputtering surface having a first area placed at the center, which is circular and flat; and a second area placed outside of the first area and concentrically with the first area, which has a ring shape, wherein the first area is positioned at a location lower than that of the second area by 15% of thickness of the second area at most, and the first area has a diameter which is ranging from 60% to 80% of a circumferential diameter of the sputtering surface.

主权项

1. A sputtering target comprising a target material, which is characterized in that
the target material has a sputtering surface having
a first area placed at the center, which is circular and flat; anda second area placed outside of the first area and concentrically with the first area, which has a ring shape, wherein the first area is positioned at a location lower than that of the second area by 15% of thickness of the second area at most, and the first area has a diameter which is ranging from 60% to 80% of a circumferential diameter of the sputtering surface.