Patent ID: 7495206

Claim:
An image sensor, comprising: a photo detection device including a photodiode formed at a first end of said photo detection device, a first plurality of bonding pads formed on a second end of said photo detection device opposite said first end and a transfer transistor configured to transfer photoelectric charges produced by said photodiode, said transfer transistor having an electrode and being located between said photodiode and said first plurality of bonding pads such that said electrode of said transfer transistor being located below a plane defined by said photodiode; and a peripheral circuits device including a second plurality of bonding pads formed on one end of said peripheral circuit device, said peripheral circuits device further including peripheral circuits formed on a substrate; wherein said photo detection device is stacked on top of said peripheral circuits device such that ones of said first plurality of boding pads are electrically coupled to associated ones of said second plurality of bonding pads to provide electrical connection path between said photodiode and said peripheral circuits.