Light-receiving module and light-receiving device having...

Details Light-receiving module and light-receiving device having... Light-receiving module and light-receiving device having...

2006-01-24

2006-01-24

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C257S458000

Reexamination Certificate

active

06989522

ABSTRACT:
A light-receiving device has a high-concentration impurity layer of a first conductivity type and a high-concentration impurity layer of a second conductivity type surrounding it formed on a substrate of the first conductivity type having a low impurity concentration so as to function as a light-receiving portion. The high-concentration impurity layers of the first and second conductivity types are arranged in the same direction as the top surface of the substrate. A layer having a short carrier life time is formed on the bottom surface of the substrate. Thus, carriers ascribable to unnecessary light components that have reached the layer having a short carrier life time have a shorter life time, making it possible to sufficiently cut unnecessary long-wavelength light components.

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A copy of International Preliminary Examination Report mailed on Oct. 1, 2001 (Japanese).
A copy of English translation of International Search Report mailed on Aug. 14, 2001.
A copy of International Search Report mailed on Aug. 14, 2001 (Japanese).

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