Semiconductor memory having redundancy

Details Semiconductor memory having redundancy Semiconductor memory having redundancy

1986-08-06

1988-03-22

Moffitt, James W.

Static information storage and retrieval

Read/write circuit

Bad bit

365 96, 365179, G11C 800

Patent

active

047333723

ABSTRACT:
Herein disclosed is a bipolar memory having redundancy, which can be produced with a small area. In this semiconductor memory having a body memory for storing data and a spare memory for relief of fault bit of the body memory, a row is selected by cutting fuses in a decoder. Fundamentally signal lines such as word lines are not provided with fuses. Other parts including a power source and a reference voltage source are provided with fuses without decreasing the operating speed accompanied by only a slight increase in the area.

REFERENCES:
patent: 3872450 (1975-03-01), Reynolds
patent: 4101974 (1978-07-01), Immer et al.
patent: 4586169 (1986-04-01), Itoh et al.

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