Optical photodiode switch array with zener diode

Details Optical photodiode switch array with zener diode Optical photodiode switch array with zener diode

1989-09-08

1990-12-18

Mintel, William

357 16, 357 19, 357 30, 357 38, 357 13, H01L 3300

Patent

active

049790021

ABSTRACT:
An optical switching array includes a body of a semiconductor material having opposed surfaces. A plurality of spaced bodies of a semiconductor material are on one of the surfaces of the substrate. Each body includes four superimposed regions extending thereacross with the regions being of alternating opposite conductivity type to form PN junctions between adjacent regions. The bodies are capable of emitting light in response to an optical input when an electrical bias is applied thereacross. A fifth region extends across each body and forms a Zener diode with one of the outer region of the body. The Zener diode is adapted to limit the voltage drop across the bodies when one of the bodies is biased to emit light so as to permit more than one body to be turned to its light emitting condition at any one time.

REFERENCES:
patent: 3938172 (1976-02-01), Lockwood
patent: 3939172 (1976-02-01), Lockwood
patent: 4152713 (1979-05-01), Copeland et al.
patent: 4316156 (1982-02-01), Scifres et al.
patent: 4399448 (1983-08-01), Copeland
Copeland et al, "P14 N-P-N Optical Detectors and Light-Emitting Diodes," IEEE Journal of Quantum Electronics, vol. QE-14, No. 11, Nov. 1978, pp. 810-813.
Pankove et al, "A PNPN Optical Switch," SPIE, vol. 963, Optical Computing 88 (1988), pp. 191-196.
K. Kubota et al, "Optical Crossbar interconnection Using Vertical-to-Surface Transmission Electro-Photonic Devices (VSTEP)", published SPIE, vol. 963, Optical Computing 88 (1988), pp. 255-259.

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