Image sensor and electronic apparatus

An electronic apparatus comprising:

• an image sensor;
• an optical system configured to guide incident light to the image sensor;
• and
• a processing unit configured to process a signal output from the image sensor,
• wherein the image sensor includes
• a first substrate having a plurality of photoelectric transducers formed on the first substrate,
• a second substrate having a pixel transistor for each of sets of two or more of the photoelectric transducers as a constituent unit, the pixel transistor being shared by the set and formed on the second substrate, and
• a second wiring which is connected to a first wiring formed on the second substrate via one contact, and is connected to a plurality of first elements, the first wiring leading to a second element shared by a plurality of first elements among a plurality of elements formed on the first substrate, each of the plurality of first elements being formed for each of the photoelectric transducers.

An image sensor comprising:

• a first substrate having a first photoelectric transducer and a second photoelectric transducer formed on the first substrate;
• a first wiring formed on the first substrate and connected to the first photoelectric transducer and the second photoelectric transducer;
• a second substrate having a pixel transistor formed on the second substrate, the pixel transistor being connected to the first photoelectric transducer and the second photoelectric transducer;
• a second wiring formed on the second substrate;
• and
• a third wiring formed to penetrate the first substrate and the second substrate and connected to the first wiring and the second wiring.

An electronic apparatus comprising:

• an image sensor;
• an optical system configured to guide incident light to the image sensor;
• and
• a processing unit configured to process a signal output from the image sensor,
• wherein the image sensor includes
• a first substrate having a first photoelectric transducer and a second photoelectric transducer formed on the first substrate;
• a first wiring formed on the first substrate and connected to the first photoelectric transducer and the second photoelectric transducer;
• a second substrate having a pixel transistor formed on the second substrate, the pixel transistor being connected to the first photoelectric transducer and the second photoelectric transducer;
• a second wiring formed on the second substrate;
• and
• a third wiring formed to penetrate the first substrate and the second substrate and connected to the first wiring and the second wiring.