Patent ID: 7307308

Claim:
A non-volatile memory cell comprising: a substantially single crystalline semiconductive material of a first conductivity type, having a substantially planar surface with a trench in said surface of said material; said trench having a sidewall and a bottom wall; a first region of a second conductive type, different from said first conductivity type in said material along said planar surface; a second region of a second conductive type in said material along said bottom wall of said trench; a channel region, having a first portion and a second portion, connecting said first and second regions for the conduction of charges, wherein said first portion is along said surface adjacent to said first region, and said second portion is along said sidewall adjacent to said second region; a dielectric on said channel region; a floating gate in said trench, on said dielectric, spaced apart from said second portion of said channel region; a first gate electrode on said dielectric, spaced apart from said first portion of said channel region; and a second gate electrode, in said trench, capacitively coupled to said floating gate, and to said second region.