Patent ID: 8598638

Claim:
A solid-state image capturing element, comprising: a one conductivity type semiconductor substrate; an opposite conductivity type well region formed on the one conductivity type semiconductor substrate; a photodiode section formed on the opposite conductivity type well region, constituted of a plurality of one conductivity type regions with successively different impurity concentrations for complete electric charge transferring; a one conductive drain region capable of reading out signal charges from the photodiode section; a transfer gate formed above a substrate between the one conductivity drain region and the photodiode section; and wherein the plurality of one conductivity type regions constituting the photodiode section are constituted of n stages (n being a natural number of 2 or above) of impurity concentration regions, including a first one conductivity type region proximal to the transfer gate; a second one conductivity type region covering the outside of the first one conductivity type region excluding the transfer gate side thereof, . . . and an n th one conductivity type region covering the outside of an (n−1) th one conductivity type region excluding the transfer gate side thereof.