ROM memory device having repair function for defective cell...

Details ROM memory device having repair function for defective cell... ROM memory device having repair function for defective cell...

2005-04-19

2005-04-19

Mai, Son (Department: 2818)

Static information storage and retrieval

Read/write circuit

Bad bit

C365S104000

Reexamination Certificate

active

06882585

ABSTRACT:
Disclosed is a ROM device with a repair function where defective cells are repaired by a bit cell unit. The defective cells are repaired using a ground or operating (e.g., a supply) voltage line incorporated in the ROM device. This allows the defective cells to be repaired without separate redundant cells. After repairing, a test operation for replaced cells is not needed.

REFERENCES:
patent: 4601031 (1986-07-01), Walker et al.
patent: 5452258 (1995-09-01), Hotta
patent: 5502676 (1996-03-01), Pelley et al.

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