Patent ID: 6654108
Filing Date: 2003-11-25
Classification: B24B,H01L

Abstract:
A test structure, which is to be formed on a patterned structure, progressing on a production line and having a pattern area formed by spaced-apart metal-containing regions representative of real features of the patterned structure, so as to enable concurrent application of a Chemical Mechanical Planarization process to a top surface of the test structure and to a top surface of said pattern area, wherein the test structure comprises at least one pair of structures arranged in a spaced-apart relationship along a vertical axis, each of said structures comprising at least one pattern zone containing spaced-apart metal regions, the test structure thereby comprising at least one pair of vertically aligned upper and lower pattern zones, the upper and lower pattern zones in each pair having different patterns oriented with respect to each other such that the metal regions of the lower pattern are located underneath the spaces between the metal regions of the upper pattern, said upper pattern zone being disposed as a top layer of said test structure.