Patent ID: 9048164
Filing Date: 2015-06-02
Classification: H01L,H04N

Abstract:
1. A solid state imaging device with an electron multiplying function comprising: a P-type semiconductor substrate; a first P-type epitaxial well layer on the semiconductor substrate; an imaging region formed within and in contact with the first P-type epitaxial well layer that serves as a potential well for the imaging region; a horizontal shift register that includes an N-type semiconductor region formed within the first P-type epitaxial well layer and that transmits a signal from the imaging region; a second P-type well region formed within the first P-type epitaxial well layer; and a multiplication register that multiplies electrons from the horizontal shift register, the multiplication register formed within and in contact with the second P-type well region that serves as a potential well for the multiplication register, wherein the N-type semiconductor region extends in the second P-type well region, and a P-type impurity concentration in the second P-type well region is higher than a P-type impurity concentration in the first P-type epitaxial well layer.