X-ray detector with radiation hard photodiode design

Details X-ray detector with radiation hard photodiode design X-ray detector with radiation hard photodiode design

2007-04-24

2007-04-24

Porta, David (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

Semiconductor system

Reexamination Certificate

active

11300796

ABSTRACT:
A photodetector for X-ray applications is disclosed incorporating a photodiode design with reduced leakage at each pixel location. The photodiode is of a reduced surface area and has a peripheral edge of reduced length. The length may be minimized by making the photodiode round. The diode is surrounded by a reflective layer that may act as a contact for the diode. Photons are reflected by the reflective layer back towards the reduced area diode to maintain good sensitivity. The reflective/contact layer may form a capacitor with another contact layer by disposing a dielectric layer therebetween, thereby increasing the effective capacitance of the photodiode.

REFERENCES:
patent: 6838674 (2005-01-01), Otto
patent: 2002/0014592 (2002-02-01), Rutten et al.

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