Abstract: Electrically non-active structures are formed for an electronic circuit to make uniform a surface above a semiconductor substrate. The electronic circuit includes first electrically active structures comprising conductive elements of a first height projecting from the semiconductor substrate, and second electrically active structures comprising conductive elements of a second height projecting from the semiconductor substrate. The first height is different from the second height. The electrically non-active structures are formed by identifying, among the electrically non-active structures, a first group of electrically non-active structures formed within areas that substantially extend for a radius around each electrical component belonging to the second electrically active structures. The method further includes identifying, among the electrically non-active structures, a second group of electrically non-active structures not belonging to the first group of electrically non-active structures.