Patent ID: 6713782
Filing Date: 2004-03-30
Classification: H01L

Abstract:
A wafer comprising:a semiconductor substrate; a dielectric formed over the semiconductor substrate, the dielectric having a plurality of trenches therein; conductive lines in the trenches; wherein the dielectric and the conductive material in the trenches form a first structure and a second structure spaced from the first structure, wherein each of the first and second structures have the same distance between corresponding points of adjacent trenches, wherein at least one trench extends from a first side of the first structure to a second side of the first structure, and the first structure also has a third side and a fourth side opposite to the third side, wherein the first structure is adjoined on at least its third and fourth sides by first regions which do not have said conductive material or in which said conductive material has a lower density than in the first structure, wherein at least one trench extends from a first side of the second structure to a second side of the second structure, and the second structure also has a third side and a fourth side opposite to the third side, and the second structure is adjoined on at least its third and fourth sides by second regions which do not have said conductive material or in which said conductive material has a lower density than in the second structure, wherein the second regions are disjoint from the first regions or overlap the first regions; wherein the second structure is smaller in size than the first structure, the first structure is part of a functional circuitry, and the second structure is a test structure not forming part of any functional circuitry manufactured in the wafer.