Imager element, device and system with recessed transfer gate

摘要

An imager element, device and imaging system image sensor pixel. The image sensor pixel includes a collection region, a floating diffusion region, and a transfer transistor having a recessed gate. The recessed gate is configured to couple the collection region to the floating diffusion region so that collected charge is transferred during activation. The recessed gate has an effective gate length greater than a physical gate length.