Patent ID: 8634060

Claim:
A microlithography projection exposure installation, comprising: a first microlithography projection system, comprising: a first illumination system configured to illuminate a first pattern; and a first projection objective configured to image the first pattern onto a first substrate; a second microlithography projection system, spatially separated from the first projection system, the second microlithography system comprising: a second illumination system configured to illuminate a second pattern; and a second projection objective configured to image the second pattern onto a second substrate; a single light source assigned to both the first and second microlithography projection systems; and an adjustable optical deflector in a light path downstream of the single light source, wherein: the adjustable optical deflector is capable of deflecting light from the single light source along a first partial path to the first projection system or along a second partial path to the second projection system, and the first and second microlithography projection systems each comprise a positioning device configured to position the substrate with the aid of measurement such that the position of the second substrate relative to a position of the first substrate is configured to be set with a positional error that is not greater than a smallest structural size to be projected onto the substrate.