Solid state radiation detector with enhanced life duration

H - Electricity – 01 – L

Patent

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Details

H01L 31/0216 (2006.01) H01L 27/146 (2006.01)

Patent

CA 2339903

The invention concerns a solid state radiation detector comprising a solid state photosensitive sensor (1) associated with a converter (2) for converting a radiation to be detected into a radiation whereto the photosensitive sensor (1) is sensitive. The photosensitive sensor (1) comprises one or several photosensitive elements (5) connected to conductors (6, 7) and a passivation layer (8) covering the photosensitive elements (5) and the conductors (6, 7) to protect them. Between the passivation layer (8) and the converter (2) is located a barrier (10) impermeable at least to one species capable of corroding the sensor (1) likely to be released by the converter (2) during at least a chemical reaction. The invention is particularly applicable to radiation detectors for medical radiology.

La présente invention concerne un détecteur de rayonnement à l'état solide comportant un capteur photosensible (1) à l'état solide associé à un convertisseur (2) destiné à convertir un rayonnement à détecter en un rayonnement auquel est sensible le capteur photosensible (1). Le capteur photosensible (1) comporte un ou plusieurs éléments photosensibles (5) reliés à des conducteurs (6, 7) et une couche de passivation (8) recouvrant les éléments photosensibles (5) et les conducteurs (6,7) pour les protéger. Entre la couche de passivation (8) et le convertisseur (2) se trouve une barrière (10) imperméable à au moins une espèce chimique corrosive pour le capteur (1) susceptible d'être libérée par le convertisseur (2) lors d'au moins une réaction chimique.

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