Patent ID: 8772844
Filing Date: 2014-07-08
Classification: H01L

Abstract:
1. A solid-state imaging device comprising: a semiconductor substrate; a first photodiode, formed in the semiconductor substrate, that performs photoelectric conversion of incident light into signal charge; a first transfer transistor, formed on the semiconductor substrate, that transfers the signal charge accumulated in the first photodiode; a detection capacitor, formed on the semiconductor substrate, that accumulates the signal charge transferred by the first transfer transistor; and a reset transistor, formed on the semiconductor substrate, that discharges, into a drain, the signal charge accumulated in the detection capacitor; and a trench isolation region, formed on the semiconductor substrate, that surrounds a first active region of the first photodiode, a second active region of the first transfer transistor, a third active region of the detection capacitor and a fourth active region of the reset transistor, wherein ions are distributed in at least a first boundary between a portion of the fourth active region directly below a gate electrode of the reset transistor and the trench isolation region, the ions enhancing generation of carriers of an opposite polarity to a polarity of carriers in a channel below the gate electrode of the reset transistor, and wherein the reset transistor has an effective gate width shorter than an effective gate length.