INFRARED LIGHT DETECTING ELEMENT

Japanese Patent JPH04357420

A

PURPOSE:To make an infrared detecting element inexpensive and highly sensitive by providing an infrared stimulating phosphor in front of a photodetecting part of an Si photodetector. CONSTITUTION:This infrared detecting element is constituted of an infrared stimulating fluorescent body 1 and an Si photodetector 2. The fluorescent body 1 is sensitive to and detects the infrared light of 1.3mum, 1.55mum bands of an infrared light source used in the optical communication. The light in the bands is converted to a visible light of the sensitivity wavelength of the detector 2 by the fluorescent body 1 and efficiently detected by tone detector 2. In this manner, the incident infrared light can be detected with good sensitivity because it is converted to a visible light, within the fluorescent body 1 and detected by the detector 2. Fluorescent powders are dispersed in an organic binder and, then applied and dried on a glass substrate thereby to obtain the fluorescent body 1. The glass substrate is bonded to the photodetecting part of the detector 2 in a direction in which the fluorescent surface is in touch with the photodetecting surface.

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TAMURA YASUAKI
OWAKI JUNICHI
SHIBUKAWA ATSUSHI

JP14399791A

December 10, 1992

May 20, 1991

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NIPPON TELEGRAPH & TELEPHONE

G01J1/02; H01L31/09; H01L31/10; (IPC1-7): G01J1/02; H01L31/09; H01L31/10

Amamiya Masaki

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