Semiconductor memory device and method of fabricating the same

Details Semiconductor memory device and method of fabricating the same Semiconductor memory device and method of fabricating the same

1996-02-28

1997-09-09

Nelms, David C.

Static information storage and retrieval

Read only systems

Semiconductive

365226, 36518516, 36518517, G11C 1700

Patent

active

056663048

ABSTRACT:
In order to improve the degree of storage data integration, side walls (32) are selectively formed on side surfaces of word lines (22) to serve as masks for changing ON-state current values of memory cells by changing widths or lengths of active regions (24) of the memory cells, thereby forming a plurality of types of memory cells having different electrical properties. Thus, storage data per memory cell is so multivalued that the number of memory cells is reduced.

REFERENCES:
patent: 5345416 (1994-09-01), Nakagawa
patent: 5392233 (1995-02-01), Iwase

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