Patent ID: 8884319

Claim:
A semiconductor device comprising: a semiconductor substrate having a main surface; a first conductivity type impurity layer disposed over the main surface of the semiconductor substrate; a plurality of unit pixels arranged in a matrix pattern, each unit pixel including: a photoelectric transducer, disposed over the first conductivity type impurity layer, including a first conductivity type impurity region and a second conductivity type impurity region which are joined to each other, a first transistor, formed in a first active region, including the first impurity region as the photoelectric transducer and a second impurity region as an impurity diffusion layer, and a second transistor, electrically coupled to the first transistor and formed in a second active region, including an impurity region as an impurity diffusion layer; and an isolation insulating layer, containing an air gap, for electrically isolating one photoelectric transducer from another photoelectric transducer adjacent to the one photoelectric transducer, the isolation insulating layer abutting on a top surface of the first conductivity type impurity layer, wherein a shortest distance between the first active region of the first transistor included in one unit pixel of a pair of neighboring unit pixels among the plurality of unit pixels and the first active region of the first transistor included in the other unit pixel of the pair of unit pixels is smaller than a shortest distance between the first active region of the first transistor and the second active region of the second transistor adjacent to the first transistor in a plan view.