Semiconductor nonvolatile memory

Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Having insulated electrode

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257410, 257411, H01L 29792

Patent

active

055897002

ABSTRACT:
A semiconductor nonvolatile memory comprised of a p-type silicon substrate 3, an n.sup.+ drain 5 and an n.sup.+ source 9, the source and the drain regions defining an MOS channel region 7. On top of the channel region 7 there are laminated a silicon dioxide film 18 and a semiconductor rich oxide film 20 which has been nitrided so as to leave silicon nitride region therein. Further on top of these layers, there is formed a polysilicon film 22, which is etched to form a control electrode. By using the memory cell and appropriate select transistors, a semiconductor nonvolatile memory (EPROM) is constructed.

REFERENCES:
patent: 5319230 (1994-06-01), Nakao
DiMaria, D. J., Ghez, R. and Dong, D. W., "Charge trapping studies in SiO.sub.2 using current injection form Si-rich SiO.sub.2 Films", J. Appl. Phys. 51(9), Sep. 1988.

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