Patent ID: 6872992

Claim:
A semiconductor device comprising: a first back-illuminated semiconductor image pickup element, having a front and a back and a first photosensitive region which is closer to said front than said back thereof; and a second semiconductor image pickup element also having a front and a back and a second photosensitive region which is closer to said front than back thereof, said second semiconductor image pickup element being made of a semiconductor material different from that of said first back-illuminated semiconductor image pickup element, wherein said first back-illuminated semiconductor image pickup element and said second semiconductor image pickup element are secured such that respective fronts of said first back-illuminated semiconductor image pickup element and said second semiconductor image pickup element are closer to each other than their respective backs; wherein mutually opposite faces of said first back-illuminated semiconductor image pickup element and said second semiconductor image pickup element are adhered via at least three or more bumps; wherein said first back-illuminated semiconductor image pickup element comprises a shift register as formed over said first back-illuminated semiconductor image pickup element; wherein said shift register is electrically connected via said bumps to said second semiconductor image pickup element, and that a signal from said second semiconductor image pickup element is read by driving said shift register; and wherein said first back-illuminated semiconductor image pickup element is made of a wider energy band gap material than that of said second semiconductor image pickup element, the wider energy band gap material forming a thin shape portion for receiving light.