Patent Document ID: 8673793
Application ID: 13358131
Patent Status: 1

Claim One:
1. A method for calculating an offset value for aligned deposition of a second pattern onto a first pattern, comprising steps of: (a) loading a substrate with the first pattern on a surface of the substrate into a pattern recognition device at an original position inside the pattern recognition device; (b) determining a coordinate of a prescribed point of the first pattern by the pattern recognition device by use of illumination; (c) superimposing the second pattern onto the first pattern on the surface of the substrate; (d) bringing back the substrate with the first pattern and the second pattern into the original position inside the pattern recognition device; (e) determining a coordinate of a prescribed point of the second pattern by the pattern recognition device by use of illumination; wherein the prescribed point of the first pattern corresponds to the prescribed point of the second pattern; and (f) calculating the offset value between the first pattern and the second pattern, wherein an illumination for determining the prescribed point of the first pattern has a different spectrum or illumination intensity from an illumination for determining the prescribed point of the second pattern, and wherein the prescribed point is an intersection of a busbar and a finger contact on a silicon wafer.