Patent ID: 6852456
Filing Date: 2005-02-08
Classification: G03F

Abstract:
1. A computer readable medium on a computer, the computer readable medium comprising computer executable instructions for performing a method comprising: determining a first critical dimension of a registration structure, the semiconductor registration structure formed in at least two overlying material layers of a semiconductor wafer for registering the relative position of a first material layer to a second material layer; determining an apparent registration measurement of the registration structure; measuring a second critical dimension of the registration structure when the registration structure comprises an asymmetrically deposited film; using the first critical dimension and the second critical dimension to determine the registration measurement error of the registration structure due to the asymmetrically-deposited film; subtracting the registration measurement error from the apparent registration measurement of the registration structure to generate a corrected data representative of an actual registration of the registration structure; and conveying the actual registration data to a patterning apparatus to align a subsequently patterned layer relative to the structure.