Method of forming a mask programmable read only memory device wi

Details Method of forming a mask programmable read only memory device wi Method of forming a mask programmable read only memory device wi

1994-09-14

1995-07-04

Chaudhuri, Olik

Fishing, trapping, and vermin destroying

437 45, 437 52, 437101, H01L 21265

Patent

active

054299683

ABSTRACT:
A mask programmable read only memory device comprises a plurality of memory cell blocks each having a plurality of first series combinations of memory transistors and a plurality of second series combinations of memory transistors, and each of the memory transistors is operative in either enhancement or depletion mode, wherein the plurality of first series combinations are respectively overlapped with the plurality of second series combinations so as to share word lines therebetween, thereby increasing the integration density without sacrifice of the real estate.

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patent: 4980861 (1990-12-01), Herdt et al.
patent: 5002896 (1991-03-01), Naruke
patent: 5126290 (1992-06-01), Lowrey et al.
"16-Mbit Mask ROM MN2316000", National Technical Report, vol. 36, No. 3, Jun. 1990, by E. Yamamoto, et al., pp. 270-277 (including English abstract).
"MASK ROM", Electric Wave Newspaper, Jan. 18, 1991, p. 36 and partial English translation.
Patent Abstracts of Japan, vol. 14, No. 205 (E-921)(4148) 26 Apr. 1990, & JP-A-02 044 768 (Ricoh) (Abstract).

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