Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2011-08-16
2011-08-16
Thomas, Tom (Department: 2893)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
C250S338100, C250S338400, C250S339110, C250S341800, C257S461000, C257SE31003
Reexamination Certificate
active
07999231
ABSTRACT:
A moisture detector includes a light-receiving element including an absorption layer having a pn-junction, or an array of the light-receiving elements, wherein the absorption layer has a multiquantum well structure composed of a Group III-V semiconductor, the pn-junction is formed by selectively diffusing an impurity element into the absorption layer, and the concentration of the impurity in the absorption layer is 5×1016/cm3or less. The moisture detector receives light having at least one wavelength included in an absorption band of water lying in a wavelength range of 3 μm or less, thereby detecting moisture.
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Iguchi Yasuhiro
Nagai Youichi
Rodela Eduardo A.
Sartori Michael A.
Schwarz Steven J.
Sumitomo Electric Inductries, Ltd.
Thomas Tom
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