Patent ID: 8114695

Claim:
A method of producing a solid-state image pickup element, comprising the steps of: forming a hole portion defining a hole therein, in a first-conductive type planar semiconductor layer formed on a second-conductive type planar semiconductor layer; forming a first-conductive type high-concentration impurity region in a bottom wall of the hole portion of the first-conductive type planar semiconductor layer; forming a first-conductive type high-concentration impurity-doped element isolation region in a part of a sidewall of the hole portion of the first-conductive type planar semiconductor layer; forming a second-conductive type photoelectric conversion region adapted to undergo a change in charge amount upon receiving light, in a portion of the first-conductive type planar semiconductor layer located beneath the first-conductive type high-concentration impurity region and in a part of a lower region of the remaining part of the sidewall of the hole portion of the first-conductive type planar semiconductor layer; forming a transfer electrode on the entire sidewall of the hole portion of the first-conductive type planar semiconductor layer through a gate dielectric film wherein forming the transfer electrode further comprises forming the transfer electrode on the sidewall where the first-conductive type high-concentration impurity-doped element isolation region is formed; forming a second-conductive type CCD channel region in a top surface of the first-conductive type planar semiconductor layer and in a part of an upper region of the remaining part of the sidewall of the hole portion of the first-conductive type planar semiconductor layer; and forming a read channel 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.