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US 8,552,466 B2Granted
Low capacitance photodiode element and computed tomography detector
AssigneeGeneral Electric Company
InventorsAbdelaziz Ikhlef, Wen Li, Jeffrey Alan Kautzer
Life of this patent
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Abstract
A photodiode element includes a first layer of a first diffusion type and a second layer. The second layer defines a charge-collecting area. The charge-collecting area includes an active region of a second diffusion type and an inactive region. The active region surrounds the inactive region. The photodiode element also includes an intrinsic semiconductor layer between the first layer and the second layer.
Claims11
A photodiode element comprising:
- a first layer comprising a first diffusion type;
- a second layer defining a charge-collecting area, said charge-collecting area comprising an active region of a second diffusion type and an inactive region, wherein the active region comprises a grid with three or more parallel rungs running in a first direction that are intersected by at least two parallel rungs running in a second direction;
- and
- an intrinsic semiconductor layer disposed between the first layer and the second layer.
1 more element
A computed tomography detector comprising:
- a scintillator array for converting x-rays into visible light;
- and
- a photodiode array positioned to receive visible light from the scintillator, said photodiode array comprising a plurality of photodiode elements, each of said plurality of photodiode elements comprising:
- a first layer comprising a first diffusion type;
- a second layer defining a charge-collecting area, said charge-collecting area comprising an active region of a second diffusion type and a plurality of inactive regions, wherein the active region comprises a grid, the grid comprising four rungs that are each connected to both of two side pieces, wherein the rungs are generally perpendicular to the side pieces;
- and
- an intrinsic semiconductor layer disposed between the first layer and the second layer.
4 more elements
Dependencies are inferred from the claim text.