Patent ID: 7605376

Claim:
An image sensor comprising: an output bus; a two-dimensional array of pixel sensors, each pixel sensor comprising: a capacitor; a plurality of light sensors, each light sensor comprising a photodiode and a photodiode gate transistor for connecting said photodiode to said capacitor; a charge converter that generates an output signal on an output node, said output signal being determined by a charge on said capacitor; and a transfer gate that connects said output node to said output bus; and a layer of scintillation material adjacent to said array, said scintillation material emitting light in response to x-rays impinging thereon, said light being detected by said pixel sensors; wherein said photodiodes are pinned photodiodes of a light sensing area no greater than 6 μm by 6 μm; and wherein each of said pixel sensors has a light sensing area significantly greater than 36 μm 2 .