Patent ID: 7538328
Filing Date: 2009-05-26
Classification: H01L

Abstract:
1. An imaging detector for detecting ionizing radiation such as X-rays or electron radiation, in a predetermined energy range, comprising: a sensor having a germanium substrate having opposed first and second major surfaces, a upper silicon layer on the first major surface and a lower silicon layer on the second major surface, wherein the germanium substrate, upper silicon layer, and lower silicon layer are unpatterned, the sensor having a doped upper ohmic contact region formed in the upper silicon layer and a conductive electrode on the doped upper ohmic contact region in contact with the doped upper ohmic contact region; a plurality of contact electrodes connected to the lower silicon layer, the plurality of electrical contacts being arranged in a two-dimensional array to define a respective plurality of pixels; and a read-out chip connected to the sensor by the contact electrodes.