Patent ID: 7491925

Claim:
A photodetector for processing low luminous intensities comprising a monolithically integrated transimpedance amplifier and evaluation electronics, the photodetector having two opposite chip sides, and light (L) being incident from one of the chip sides, the photodetector further comprising a photocell portion ( 20 ) associated with one of the chip sides; an electronic circuit portion ( 30 ) formed on the other of the chip sides, opposite said photocell portion ( 20 ); electric connections between said photocell portion ( 20 ) and the electronic circuit portion ( 30 ), said electric connections extending in a direction parallel to an axis, said axis being orthogonal as a chip normal with respect to a chip plane, said chip plane being parallel to each of the opposite chip sides; wherein said electric connections between said photocell portion ( 20 ) and said electronic circuit portion ( 30 ) are formed by filled trenches doped in specified areas that are extending in a crystalline semiconductor.