. . . " 2001Motorola, Inc.Memory cell and method for programming thereofUS6320786Feb 5, 2001Nov 20, 2001Macronix International Co., Ltd.Method of controlling multi-state NROMUS6351411Jun 12, 2001Feb 26, 2002Micron Technology, Inc.Memory using insulator trapsUS6353554Dec 12, 2000Mar 5, 2002Btg International Inc.Memory apparatus including programmable non-volatile multi-bit memory cell, and apparatus and m" . .