Patent ID: 8319878
Filing Date: 2012-11-27
Classification: H01L,H04N

Abstract:
1. A solid-state imaging device comprising: a semiconductor substrate having photoelectric conversion elements formed in a matrix pattern, a plurality of vertical transfer elements, each of which reads signal charges from said photoelectric conversion elements arranged in a column direction and transfers said signal charges in a vertical direction, and a horizontal transfer element which transfers in a horizontal direction the signal charges sent from each of said vertical transfer elements, wherein said horizontal transfer element is comprised of: a charge transfer channel having a first charge transfer channel portion and a second charge transfer channel portion arranged alternately, said second charge transfer channel portion having a lower impurity concentration than said first charge transfer channel portion; a first transfer electrode formed over said first charge transfer channel portion, with a gate insulating film interposed in between; a second transfer electrode formed over said second charge transfer channel portion, with a gate insulating film interposed in between; and an interelectrode insulating film which is formed above a boundary between said first charge transfer channel portion and said second charge transfer channel portion and between said first transfer electrode and said second transfer electrode; wherein said first transfer electrode and said second transfer electrode are connected to a same driving potential and the first charge transfer electrode and the second charge transfer electrode are each more narrow than the corresponding first charge transfer channel portion and second charge transfer channel portion.