Semiconductor photodetector with dielectric shielding

Details Semiconductor photodetector with dielectric shielding Semiconductor photodetector with dielectric shielding

1993-03-09

1994-09-06

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

257435, H01J 516

Patent

active

053450752

ABSTRACT:
A semiconductor photodetector comprising a photodiode chip, a header for mounting the chip, a receptacle, and a ferrule for holding an end of an optical fiber. The photodetector does without a lens. A dielectric layer covers a periphery of the photodiode chip for shielding it from incidence of extra light beams by reflecting or absorbing light. Omission of a lens reduces the costs of parts and assembly. Since no light beams enter the peripheral part of photodiode chip, no delayed photocurrent is produced. Reproduced signals are immune from deformation or delay of phase. The photodetector facilitates wide prevalence of optoelectronic communication.

REFERENCES:
patent: 5015844 (1991-05-01), Cole
patent: 5159186 (1992-10-01), Ohzu

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