US Patent 7778073 Integrated circuit having NAND memory cell strings

Embodiments of the present invention relate generally to integrated circuits and methods for manufacturing an integrated circuit. In an embodiment of the invention, an integrated circuit having a memory cell is provided. The memory cell may include a trench in a carrier, a charge trapping layer structure in the trench, the charge trapping layer structure comprising at least two separate charge trapping regions, electrically conductive material at least partially filled in the trench, and source/drain regions next to the trench.