Patent ID: 6896999

Claim:
A method of exposing a semiconductor wafer in an exposer, the method which comprises: providing a semiconductor wafer having at least one alignment mark disposed in a first layer on the semiconductor wafer and being covered by at least a second layer disposed on the first layer; providing a microscope measuring instrument including an optical lens system, a first light source with a visible wavelength range for a visual detection of the at least one alignment mark, a second light source with a ultraviolet wavelength range for an exposure of a first resist layer, a movable substrate holder, a changeover device for changing over from the first light source to the second light source, and a detector unit; applying a first resist layer to the second layer, transmitting light from one of the first light source and the second light source through the optical lens system onto the semiconductor wafer in order to expose the first resist layer in a region above the at least one alignment mark and developing the resist layer; etching the second layer underneath an exposed region above the at least one alignment mark in order to uncover the at least one alignment mark; removing the first resist layer; applying a second resist layer to the semiconductor wafer; aligning the semiconductor wafer in the exposer by using the at least one alignment mark; and exposing the second resist layer in the exposer by projecting a structure from a mask onto the semiconductor wafer.