Patent attributes
A solid-state image pickup device comprises a plurality of pixels arrayed in an XY matrix fashion, each pixel including a photoelectric-converting portion 1 for photoelectrically converting incident light into signal electric charges and accumulating therein the thus photoelectrically-converted signal electric charges, an accumulation region 3 for converting the thus accumulated signal electric charges into a voltage and a transfer gate 2 for transferring the signal electric charges accumulated in this photoelectric-converting portion 1 to the accumulation region 3, wherein an amount of saturation electric charges is increased by forming a difference in potential level under the transfer gate 2.