Patent ID: 7569936

Claim:
A semiconductor device comprising: a semiconductor substrate having a pattern area and a non-pattern area; a conductor pattern formed on said pattern area of said semiconductor substrate; a plurality of dummy patterns formed on said non-pattern area of said semiconductor substrate; an insulating film formed on said conductive pattern and said plurality of dummy patterns; wherein said insulating film is formed by a chemical vapor deposition and is smoothed by chemical mechanical polishing; wherein each of said plurality of dummy patterns are formed in a plurality of dummy areas, each of said plurality of dummy areas having a same shape, and each of said plurality of dummy patterns being arranged in a matrix with predetermined spacing; wherein each of said dummy patterns has a space portion within each of the dummy areas so that a pattern ratio of said semiconductor device is reduced; wherein each of said dummy patterns includes an opening at the space portion, the opening having a shape of a letter or a number, each opening of said dummy patterns having a width less than 72 μm; and wherein the openings of the dummy patterns each have a shape different from one another.