Patent attributes
The present invention relates to a photo-detecting apparatus having a structure which can accurately detect light by restraining noises from occurring. The photo-detecting apparatus comprises a first substrate having a surface provided with M×N photodiodes and switches; a second substrate having a surface provided with signal processing parts for processing output signals of the photodiodes; and a third substrate arranged between the first and second substrates. The third substrate has a first surface opposing the first substrate and a second surface opposing the second substrate. In the third substrate, M common wires for connecting the photodiodes to the signal processing parts are arranged on the first surface, whereas bonding pads connected to the respective common wires are arranged on the second surface. The photodiodes on the first substrate are electrically connected to their corresponding common wires in the third substrate by way of first bumps, whereas the signal processing parts on the second substrate are electrically connected to their corresponding bonding pads in the third substrate by way of second bumps.
