Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1996-05-01
1997-07-01
Le, Que
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250226, 359359, 257464, H01J 314
Patent
active
056441240
ABSTRACT:
Disclosed is a photodetector with a multilayer filter. A light-receiving substrate is mounted on a recessed portion of a ceramic stem. An electrode pad is formed on a P-type layer of the light-receiving substrate while another electrode pad is formed on an N-type layer of the light-receiving substrate. An optical multilayer filter is formed on the light-receiving substrate except the regions of the electrode pads. Further, an epoxy transparent resin is poured into the recessed portion of the stem and then cured, so that a resin portion to cover the light-receiving substrate is formed. The optical multilayer filter is formed of amorphous low refractive index films made of SiC.sub.2 and amorphous high refractive index films made of TiO.sub.2. The amorphous high and low refractive index films are alternately stacked.
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Funakoshi Takahiro
Hamada Toshimasa
Hanamoto Tetsuya
Iwasaki Masaru
Katoh Shohichi
Le Que
Sharp Kabushiki Kaisha
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