Patent ID: 8488034

Claim:
An imaging device comprising: a pixel array section having an array of pixels each of which has a photoelectric converting device and outputs an electric signal according to an input photon, wherein the pixel array section including the pixels arranged in an array is formed on a first semiconductor substrate; a sense circuit section having a plurality of sense circuits each of which makes a binary decision on whether there is a photon input to a pixel in a predetermined period upon reception of the electric signal therefrom, wherein the sense circuit section including the plurality of sense circuits arranged in an array is formed on a second semiconductor substrate, and the first semiconductor substrate and the second semiconductor substrate are laminated one on the other; and a decision result IC section which integrates decision results from the sense circuits, pixel by pixel or for each group of pixels, multiple times to generate imaged data with a gradation, the decision result IC section including a count circuit which performs a count process to integrate the decision results from the sense circuits, and a memory for storing a counting result for each pixel from the count circuit, the plurality of sense circuits sharing the count circuit for integrating the decision results, wherein, of the count circuit and the memory, at least the count circuit is formed on the second semiconductor substrate.