Ranging device

A ranging device, comprising:

• a semiconductor layer having a first surface and a second surface opposite to the first surface;
• a lens provided on a side of the second surface;
• first and second charge storage sections provided in the semiconductor layer on a side of the first surface;
• a photodiode that is provided on and that is in contact with the semiconductor layer on the side of the first surface, wherein the photodiode includes a material different from a material of the semiconductor layer;
• an impurity layer provided in the semiconductor layer on the side of the first surface and in contact with the photodiode;
• an interlayer insulating film, wherein the interlayer insulating film is on the side of the first surface, wherein a first portion of the photodiode is disposed in the interlayer insulating film, and wherein a second portion of the photodiode protrudes into the impurity layer provided in the semiconductor layer;
• first and second voltage application sections that apply a voltage to the semiconductor layer between the first and second charge storage sections and the photodiode;
• and
• a first wire provided on the side of the first surface and electrically connected to the photodiode.