Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Patent
1997-10-14
2000-03-14
Westin, Edward P.
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
25037013, G01T 124
Patent
active
060375957
ABSTRACT:
A cross-strip radiation detector for detecting ionizing radiation with two non-parallel sets of signal strips formed on the same side of the detector. The detector includes a semiconductor having at least two sides. A bias electrode is formed on one side of the semiconductor. A signal electrode is formed on a side of the semiconductor and is used to detect the energy level of the ionizing radiation. A third electrode (the control electrode) is also formed on the semiconductor. The control electrode shares charges induced by the ionizing radiation with the signal electrode, shielding the signal electrode until the charge clouds are close to the signal electrode. The control electrode also alters the electric field within the semiconductor, such that the field guides the charge clouds toward the signal electrode when the clouds closely approach the signal electrode. Large detector arrays can be formed by butting such coplanar cross-strip detectors side-by-side without little dead area. High-voltage decoupling circuitry can be eliminated by maintaining the coplanar signal strips at substantially the same voltage.
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Digirad Corporation
Hanig Richard
Westin Edward P.
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