Patent ID: 8901690
Filing Date: 2014-12-02
Classification: H01L

Abstract:
1. A semiconductor structure for photon detection, comprising: a substrate composed of a semiconductor material having a doping of a first type; a contact region formed on a frontside of the substrate; a bias layer composed of a semiconductor material having a second doping, is arranged on a backside of the substrate and at a distance from the contact region, wherein the contact region lies opposite to at least part of the bias layer, such that an overlap region is formed to extend in a lateral direction of the substrate; and a guard ring, which is arranged on the frontside of the substrate, surrounds the contact region; wherein a reverse voltage can be applied between the contact region and the guard ring, and wherein the overlap region has a lateral extent amounting to at least one quarter of a distance between the contact region and the bias layer, and wherein the contact region comprises a metal contact connection and a semiconductor well region having doping of the first type of opposite sign to the substrate.