Patent ID: 6539276
Filing Date: 2003-03-25
Classification: G03F,H01L

Abstract:
A method of adjusting a tool so as to put it into a particular position with respect to a surface of a semiconductor circuit that has a plurality of registration features electrically isolated from the components of the circuit, said method comprising the steps of:producing an at least partial topographic record of the registration features on the surface of the semiconductor circuit, the registration features forming a plurality of projecting parts that are uniformly distributed in the form of a graduated matrix over at least part of the surface of the circuit so as to define a plurality of adjacent registration areas on the surface of the circuit; determining an adjustment position for the tool with respect to at least one of the registration features of the graduated matrix, the at least one registration feature defining the registration area that includes the adjustment position; bringing the at least one registration feature of the graduated matrix of the topographic record into coincidence with at least one reference feature of a reference drawing for at least part of the circuit, the reference features of the reference drawing corresponding to the registration features of the circuit; and adjusting the position of the tool using the at least one registration feature defining the registration area that includes the adjustment position as adjustment reference, so as to bring the tool to the adjustment position.