Patent ID: 6486954
Filing Date: 2002-11-26
Classification: G01B,G03F

Abstract:
A mark for use in measuring the relative position between a first layer and a second layer of a semiconductor device wherein the second layer is a different layer than the first layer, the,mark comprising:a first test zone that includes a first section and a second section, the first section containing a plurality of test structures formed on the first layer and the second section containing a plurality of test structures formed on the second layer, each of the test structures being composed of sub-test structures; and a second test zone that includes a first section and a second section, the first section containing a plurality of test structures formed on the first layer and the second section containing a plurality of test structures formed on the second layer, each of the test structures being composed of sub-test structures, the first section and the second section of the first test zone being positioned proximate to the second section and the first section, respectively, of the second test zone.