Semiconductor integrated circuit device and a method of producin

Details Semiconductor integrated circuit device and a method of producin Semiconductor integrated circuit device and a method of producin

1988-11-10

1990-02-06

Hearn, Brian E.

Fishing, trapping, and vermin destroying

437 43, 437 48, 437 52, 357 235, 365104, 365185, H01L 2100, H01L 2102, H01L 21265, B01J 1700

Patent

active

048988405

ABSTRACT:
A semiconductor integrated circuit device having a read-only memory which comprises a plurality of first gate electrodes arranged on a semiconductor substrate in a first direction maintaining a predetermined distance, a plurality of second gate electrodes that are arranged among said first gate electrodes and are partly overlapped on said first gate electrodes, and regions of data-writing impurities positioned under the first and second gate electrodes. The impurities for writing data are introduced through the first or second gate electrodes using the overlappings of the first and second gate electrodes as masks.

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patent: 4500975 (1985-02-01), Shirato
patent: 4612212 (1986-09-01), Masuoka et al.
patent: 4818716 (1989-04-01), Okuyama et al.

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