Patent ID: 8106457
Filing Date: 2012-01-31
Classification: H01L

Abstract:
1. A structure for detecting ionizing radiation, the structure comprising: a substrate having a buried insulator layer formed over the substrate and an active layer formed over the buried insulator layer; a transistor formed over the active layer, the transistor including a first gate conductor, a first gate dielectric and source/drain diffusion regions, the first gate conductor including a material having a substantially depleted doping concentration, wherein the first gate conductor includes a portion doped with an impurity, the doped portion located at an outer edge of the first gate conductor; a second gate conductor formed below the buried insulator layer, wherein a portion of the buried insulator layer provides a second gate dielectric corresponding to the second gate conductor; and a channel region between the first gate conductor and the second gate conductor, wherein the second gate conductor has a higher capacitive coupling to the channel region than the first gate conductor and controls the channel region, and wherein the second gate conductor acts as a detector of ionizing radiation.