A high permittivity tunneling dielectric is used in a flash memory cell to
provide greater tunneling current into the floating gate with smaller
gate voltages. The flash memory cell has a substrate with source/drain
regions. The high-k tunneling dielectric is formed above the substrate.
The high-k tunneling dielectric can be deposited using evaporation
techniques or atomic layer deposition techniques. The floating gate is
formed on top of the high-k dielectric layer with an oxide gate insulator
on top of that. A polysilicon control gate is formed on the top gate
insulator.