Patent ID: 9147708
Filing Date: 2015-09-29
Classification: H01L

Abstract:
1. A solid-state image sensor comprising: a semiconductor substrate; a first semiconductor region of a first conductivity type arranged in the semiconductor substrate; a second semiconductor region of a second conductivity type constituting a charge accumulation region, and being arranged in the first semiconductor region; and a lens for condensing light to the second semiconductor region, wherein the second semiconductor region includes a plurality of portions arranged in a direction along a surface of the semiconductor substrate, a potential barrier to a charge accumulated in the charge accumulation region is formed between the plurality of portions, the second semiconductor region is configured to be wholly depleted by expansion of a depletion region from the first semiconductor region toward the second semiconductor region, and a finally-depleted portion, which is a part of the second semiconductor region and to be finally depleted of the second semiconductor region, is configured to be depleted by the expansion of the depletion region from a portion of the first semiconductor region, located in a lateral direction of the finally-depleted portion, toward the finally-depleted portion.