Patent ID: 7675101

Claim:
An image sensor comprising: a first substrate comprising a pixel portion in which a readout circuitry is provided and a peripheral portion in which a peripheral circuitry is provided; an interlayer dielectric on the first substrate, the interlayer dielectric comprising first metal lines connected with the readout circuitry and a second metal line connected with the peripheral circuitry; a crystalline semiconductor layer on a portion of the interlayer dielectric corresponding to the pixel portion; a first photodiode and a second photodiode in the crystalline semiconductor layer, the first photodiode and the second photodiode separated by device isolation trenches, the first photodiode and the second photodiode connected to respective ones of the first metal lines; a device isolation layer on the crystalline semiconductor layer including in the device isolation trenches; an upper electrode layer passing through the device isolation layer on the crystalline semiconductor layer to connect with a portion of the first photodiode; an expose portion in the upper electrode layer, the expose portion selectively exposing an upper region of the first photodiode; and a passivation layer on the first substrate on which the expose portion is provided, wherein the first photodiode is a main pixel electrically connected with the upper electrode layer to perform a substantial operation, and the second photodiode is a dummy pixel not electrically connected with the upper electrode layer.