Patent ID: 6573120
Filing Date: 2003-06-03
Classification: H01L

Abstract:
A method of interfacing a horizontal charge transfer stage with a field insulating area of a solid state imaging device formed on a semiconductor substrate, comprising:selectively doping the semiconductor substrate with impurities of a second conductivity type to form a lower structure, wherein a field insulating area is defined on a surface of the lower structure; forming a discharge layer in a discharge area of the lower structure which is adjacent to the field insulating area by doping with impurities of a first conductivity type at a first concentration, forming a field insulating layer over the field insulation area of the surface of the lower structure; forming a barrier layer in a barrier area of the lower structure which is adjacent to the discharge area by doping with impurities of the second conductivity type, wherein the discharge area is interposed between the barrier area and the field insulating area; and forming an impurity layer in a horizontal charge transfer area of the lower structure which is adjacent to the barrier area by doping with impurities of the first conductivity type at a second concentration which is lower than the first concentration, wherein the barrier area is interposed between the horizontal charge transfer area and the discharge area.