Patent ID: 9202839
Filing Date: 2015-12-01
Classification: H01L

Abstract:
1. A solid-state imaging device comprising: a semiconductor substrate having a back side and a front side, the back side being a light incident surface, the front side being a circuit-forming surface; an opening formed in a region of a semiconductor layer of the semiconductor substrate; a connection portion formed in the region of the semiconductor layer, the connection portion connected to a contact plug that transfers signal charges generated on the back side of the semiconductor substrate into the semiconductor substrate, the connection portion having a peak of an impurity concentration distribution near an interface of the semiconductor substrate on the back side of the semiconductor substrate; a first epitaxial layer formed in the region of the semiconductor layer to completely fill the opening; a second epitaxial layer formed on the entire top surface of the semiconductor substrate; and one or more first photoelectric conversion units formed in the semiconductor substrate.