Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Reexamination Certificate
2006-02-21
2006-02-21
Kang, Donghee (Department: 2811)
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
C250S370010, C250S370140, C257S438000, C257S446000, C257S463000, C257S464000
Reexamination Certificate
active
07002156
ABSTRACT:
A detection system for detecting gamma rays including a scintillator crystal for receiving at least one gamma ray and generating at least one ultraviolet ray and an avalanche photodiode for detecting the ultraviolet ray. The avalanche photodiode includes: a substrate having a first dopant; a first layer having a second dopant, positioned on top of the substrate; a passivation layer for providing electrical passivation on a surface of the avalanche photodiode; a phosphorous silicate glass layer for limiting mobile ion transport, positioned above of the first layer; and a pair of metal electrodes for providing an ohmic contact wherein a first electrode is positioned below the substrate and a second electrode is positioned above the first layer. The avalanche photodiode comprises a first sidewall and a second sidewall forming a sloped mesa shape.
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Arthur Stephen D.
Brown Dale M.
Kretchmer James W.
Matocha Kevin S.
Sandvik Peter M.
Agosti Ann M.
General Electric Company
Kang Donghee
Patnode Patrick K.
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