Patent ID: 7310129
Filing Date: 2007-12-18
Classification: G03F

Abstract:
1. A method for carrying out a double or multiple exposure of a resist for transferring at least two different structure patterns into one layer level arranged on a semiconductor wafer, comprising: providing a mask structure including a first structure pattern and a second structure pattern; loading one mask substrate holder of a wafer scanner, as the exposure apparatus with the mask structure, the substrate holder including an exposure slot; aligning the one mask substrate holder such that, in a first position, the first structure pattern of the mask structure enters the beam path of projection optics in the exposure apparatus in order to determine a first set of alignment parameters; aligning the one mask substrate holder, such that, in a second position, the second structure pattern of the mask structure enters the beam path of the projection optics in order to determine a second set of alignment parameters; exposing a plurality of exposure fields on the semiconductor wafer, including, for each exposure field: unloading the mask structure.