Patent ID: 7852473

Claim:
Apparatus for the spatially resolved measurement of a luminescence of a semiconductor sample, in particular of a semiconductor wafer or any part thereof, said apparatus comprising: a rotatable sample holder for holding a semiconductor sample, said sample holder having a drive mechanism for rotating the sample holder rapidly during the measurement; a first device for fixing the semiconductor sample on the sample holder; a first linear stage for driving the rotatable sample holder in x direction; a second device for exciting luminescence light in a surface area of the semiconductor sample; a first detector for measuring the luminescence light; an optical device for guiding the luminescence light of the semiconductor sample to the first detector and defining a height adjustable focal point in an area of the surface of the semiconductor sample; a second linear stage arranged under the rotatable sample holder and forming together with the first linear stage an xy stage on which the sample holder is rotatably mounted; and a fixation device to remove the rotatable sample holder from the xy stage and to put it back on the xy stage or to replace it with a cryostat which is equipped with an optical window and contains a further semiconductor sample having a surface in the range of the focal point.