US Patent 11515318 3D floating-gate multiple-input device

A multiple input device is disclosed. The multiple input device includes a semiconductor structure extending in a first direction, a first dielectric material surrounding a portion of the semiconductor structure, a floating gate on the first dielectric material and surrounding the portion of the semiconductor structure, and a second dielectric material on the floating gate and surrounding the portion of the semiconductor structure. The multiple input device also includes a plurality of control gates on the second dielectric material. At least one of the control gates extends vertically away from the semiconductor structure in a second direction and at least one of the control gates extends vertically away from the semiconductor structure in a third direction.