Patent ID: 7745286

Claim:
A method of forming a memory cell, the method comprising: forming a body of a first conductivity type in a semiconductor substrate; forming a first insulator layer adjacent to the substrate; forming a charge storage region adjacent to the first insulator layer; forming first and second regions of a second conductivity type in the body; forming a channel region in the body between the first region and the second region, and generally disposed adjacent to and insulated from the charge storage region; forming a second insulator layer adjacent to the charge storage region; forming a first electrically conductive region comprising at least a portion thereof disposed adjacent to and insulated from the charge storage region by the second insulator layer; forming a filter comprising a filtering function adjacent to the first electrically conductive region; and forming a second electrically conductive region adjacent to and insulated from at least a portion of the first electrically conductive region by the filter, wherein the second electrically conductive region has charge carriers with an energy distribution and overlaps with the first electrically conductive region at an overlap surface, and wherein a line perpendicular to the overlap surface intersects at least a portion of the charge storage region.