Logic array having multiple optical logic inputs

Details Logic array having multiple optical logic inputs Logic array having multiple optical logic inputs

1986-12-22

1988-07-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

324158D, G01R 104

Patent

active

047602490

ABSTRACT:
A monolithically integrated logic circuit is provided that is programmed by an optical input. A plurality of input/output pads are provided on a semiconductor substrate having a planar surface. A plurality of semiconductor devices and a plurality of light sensitive devices are formed with selected patterns in the surface. At least one metallic layer is formed on the substrate for coupling selected ones of the semiconductor devices, light sensitive devices, and input/output pads for forming a logic circuit, wherein an output of the logic circuit is determined by programming selected ones of the plurality of light sensitive devices by applying light thereto.

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"Read-Only Memory Fabrication by Laser Formed Connections," Cook et al., IBM Tech. Disc. Bull., vol. 15, No. 8, Jan. 1973, pp. 2371-2372.

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