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US 2010/0163741 A1Published application
Radiation detector
OwnerJunichi Suzuki, Toshiyuki Sato +2inventors
InventorsJunichi Suzuki, Toshiyuki Sato, Hiroshi Koyama, Kenji Sato
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OwnerJunichi Suzuki, Toshiyuki Sato +2inventors
InventorsJunichi Suzuki, Toshiyuki Sato, Hiroshi Koyama, Kenji Sato
Estimating the term…
In the radiation detector of this invention, the second common electrode is formed on the incidence surface of the seat so as to cover at least a portion of the seat and the second common electrode is connected to the first common electrode. Thus, the second common electrode is bent at the periphery of the semiconductor and the seat, and a bent portion thereof is formed sharp. The first common electrode formed along the incidence surface of the semiconductor is disposed under the sharp portion of the second electrode (i.e., opposite to the incidence surface). Consequently, the common electrode seen from a bottom (opposite to the incidence surface) has a uniform shape, which avoids occurrence of irregular concentration of the electric fields. As a result, dark current due to concentration of the electric fields may be suppressed.
A radiation detector for detecting radiation, comprising a radiation sensitive semiconductor for generating electric charges upon incidence of the radiation, a first common electrode for bias voltage application planarly formed so as to directly contact an incidence surface of the semiconductor, an insulating seat formed on an incidence surface of the first common electrode so as to cover a portion of the first common electrode, a second common electrode for bias voltage application formed on an incidence surface of the seat so as to cover at least a portion of the seat and connected to the first common electrode, and a lead wire for bias voltage supply connected to a portion of the incidence surface of the second electrode located on the seat, wherein the first common electrode has a dimension in a predetermined range including a radiation detection effective area.
Dependencies are inferred from the claim text.