Patent ID: 7898051
Filing Date: 2011-03-01
Classification: H01L

Abstract:
1. An imaging device comprising: in order, a photoelectric conversion layer that has a silicon crystal structure and generates signal charges upon incidence of light; a multiplication and accumulation layer that multiplies the signal charges by a phenomenon of avalanche electron multiplication; and a wiring substrate that reads the signal charges from the multiplication and accumulation layer and transmits the read signal charges, wherein the photoelectric conversion layer includes: a first conductive impurity layer containing first impurities in an impurity concentration; an electron acceleration layer containing the first impurities in a lower impurity concentration than that of the first conductive impurity layer; and a second conductive impurity layer to which a voltage is applied, the second conductive impurity layer containing second impurities and disposed on a side opposite a light incidence side of the electron acceleration layer, and an insulating layer is disposed between the electron acceleration layer and the multiplication and accumulation layer.