Patent ID: 7723668

Claim:
Photodetector arrangement, having a semiconductor body which comprises a semiconductor substrate, a first layer at a first main surface of the semiconductor substrate, said first layer being adapted for reception of an incident photon radiation which is to be detected, a second layer which is a semiconductor layer of a first conduction type at a second main surface of the semiconductor substrate which is on an opposite side of the substrate from the first main surface, a third layer which is a semiconductor layer of a second conduction type which is opposite the first conduction type and is located between the substrate and the second layer, a first measurement terminal which is located on the second layer at the second main surface and is adapted for making electrical contact to the second layer from outside the photodetector arrangement, a second measurement terminal which is adapted for making electrical contact to the second layer from outside the photodetector arrangement and which is located on the second layer at the second main surface on an edge area in a region which is away from the first measurement terminal, wherein an x-coordinate of the position of incidence of a light beam on the photodetector arrangement is obtainable from the magnitude of a first measurement current flowing through said first measurement terminal and of a second measurement current flowing through said second measurement terminal.