Patent ID: 6956254

Claim:
A semiconductor device for storing electrons representing dual data bits with improved write/erase characteristics comprising: a substrate defining at least one channel region having a selected width and separating areas of buried diffusion; a bottom dielectric formed over said channel region and having a first edge and a second edge; a data storage layer formed over said bottom dielectric, said data storage layer comprising a middle dielectric extending between first and second end surfaces, and covering an intermediate portion of said bottom dielectric, said middle dielectric collecting and storing said electrons therein adjacent said first and second end surfaces as said dual data bits, a first floating gate extending over said bottom dielectric from said first edge to said first end surface of said middle dielectric and a second floating gate extending over said bottom dielectric from said second edge to said middle dielectric; a top dielectric covering said data storage layer; and a gate electrode formed over said top dielectric.