Compact poly-CMP embedded flash memory
In this paper, the compact poly-CMP cell concept is presented as a good candidate for scaled embedded flash memory in future mainstream CMOS technologies. In this compact cell concept the access gate is placed next to the stacked gate transistor. The access gate has a flat top surface due to the use of chemical mechanical polishing (CMP) and therefore no depth of focus problems with the exposure of the access gate mask occur. The feasibility is proven by electrical results on mini arrays in 0.25-?m CMOS technology. Both FowlerNordheim tunneling and source side injection programming is possible. The program and erase degradation is investigated by endurance cycling.
flash fowlernordheim tunneling embedded memory non-volatile memory poly cmp chemicalmechanical polishing source-side injection