Patent ID: 8368131

Claim:
A light detecting apparatus comprising: a semiconductor substrate having a first conductivity type first semiconductor region, and a second conductivity type second semiconductor region formed on the first semiconductor region and constituting a photodiode based on a pn junction formed between the first semiconductor region and the second semiconductor region; a first electrode layer arranged above the second semiconductor region so as to be opposed to the second semiconductor region, and electrically connected to the second semiconductor region; and a second electrode layer arranged above the first electrode layer so as to be opposed to the first electrode layer, and forming a capacitance component connected to the photodiode, between the first electrode layer and the second electrode layer, wherein the semiconductor substrate includes first and second principal surfaces opposed to each other, wherein the second semiconductor region is formed on the second principal surface side of the semiconductor substrate, the light detecting apparatus further comprising a device arranged relative to the second principal surface of the semiconductor substrate and provided with amplifying means, wherein the second electrode layer and an input terminal of the amplifying means are electrically connected to each other through a bump.