Laser programmable memory array

Details Laser programmable memory array Laser programmable memory array

1987-05-19

1989-10-03

Popek, Joseph A.

Static information storage and retrieval

Read only systems

Fusible

3652257, G11C 1700

Patent

active

048721409

ABSTRACT:
This invention discloses a laser programmable read only semiconductor-based memory array comprised of memory cells, a group of word lines, a group of bit lines. Each of the memory cells is connected to one of the group of bit lines, and one of the group of word lines and each memory cell is comprised of a memory element and a laser programmable link. In one embodiment, each memory cell is comprised of a transistor and a laser programmable link composed of the same material as either the word or the bit lines. Programming is accomplished by laser coding of the links.

REFERENCES:
patent: 3656115 (1972-04-01), Foerster
patent: 3740523 (1973-06-01), Cohen et al.
patent: 4130889 (1978-12-01), Chua
patent: 4238839 (1980-12-01), Redfern et al.
patent: 4517583 (1985-05-01), Uchida
patent: 4628590 (1986-12-01), Udo et al.
patent: 4689657 (1987-08-01), Percival et al.
Conrad J. Bolsvert, "One Day Laser Programmed Gate Arrays", Laserpath Application Note, Jun. 1986, pp. VII-1 to VII-6.
R. Smith et al., "Laser Programmable Redundancy and Yield Improvement in a 64K DRAM", IEEE Journal of Solid-State Circuits, vol. SC-16, No. 5, Oct. 1981.
J. North & W. Weick, "Laser Coding of Bipolar Read-Only Memories", IEEE Journal of Solid-State Circuits, vol. SC-11, No. 4, Aug. 1976.

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