Patent ID: 8115237

Claim:
A solid-state image pickup element comprising: a first-conductive type planar semiconductor layer; a second-conductive type planar semiconductor layer on which the first-conductive type planar semiconductor layer is formed; a hole formed in the first-conductive type planar semiconductor layer; a first-conductive type high-concentration impurity region formed in a bottom wall of the hole of the first-conductive type planar semiconductor layer; a first-conductive type high-concentration impurity-doped element isolation region formed in a sidewall of the hole of the first-conductive type planar semiconductor layer, and connected to the first-conductive type high-concentration impurity region; a second-conductive type photoelectric conversion region formed in the first-conductive type planar semiconductor layer located beneath the first-conductive type high-concentration impurity region and in a lower region of the sidewall of the hole of the first-conductive type planar semiconductor layer, and adapted to change a charge amount upon receiving light, wherein the second-conductive type photoelectric conversion region has an impurity concentration less than 1×10 18 cm −3 ; a transfer electrode formed on the entire sidewall of the hole of the first-conductive type planar semiconductor layer through a gate dielectric film, wherein the transfer electrode is formed on the sidewall where the first-conductive type high-concentration impurity-doped element isolation region is formed; a second-conductive type CCD channel region formed in a top surface of the first-conductive type planar semiconductor layer and in an upper region of the sidewall of the hole of the first-conductive type planar semiconductor layer; and a read channel formed in a region of the first-conductive type planar semiconductor layer sandwiched between the second-conductive type photoelectric conversion region and the second-conductive type CCD channel region.