Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Reexamination Certificate
2007-01-09
2007-01-09
Porta, David (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
Reexamination Certificate
active
10876069
ABSTRACT:
An x-ray detector having an increased DQE (detective quantum efficiency) is provided. The x-ray detector includes a scintillator for converting incident x-ray photons into optical photons, and an epitaxial p-i-n photodiode for converting these optical photons into an electric signal. The epitaxial photodiode includes a low resistivity N+type silicon substrate; a high-resistivity, N-type epitaxial layer that forms the intrinsic region of the photodiode; and a light-receiving P+type layer. The resistivity of the N+layer is sufficiently low, so that the diffusion lengths of the charge carriers that are formed in the N+layer by direct conversion of x-rays are small enough to allow these charge carriers to recombine before reaching the pn junction. The resistivity of the epitaxial N-layer is high enough so that the collection efficiency of the output signal resulting from the electron-hole pairs created through absorption of the optical photons in the depletion region is not impaired.
REFERENCES:
patent: 4870667 (1989-09-01), Brunnett et al.
patent: 5187380 (1993-02-01), Michon et al.
patent: 6452186 (2002-09-01), Wieczorek et al.
patent: 6521886 (2003-02-01), Aufrichtig et al.
patent: 6759658 (2004-07-01), Overdick et al.
patent: 6784512 (2004-08-01), Yamaguchi et al.
Analogic Corporation
McDermott Will & Emery LLP
Porta David
Taningco Marcus
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