Direct radiographic imaging panel having a dielectric layer...

H - Electricity – 01 – L

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H01L 31/0272 (2006.01) G01T 1/24 (2006.01) H01L 27/14 (2006.01) H01L 31/0216 (2006.01) H01L 31/09 (2006.01) H01L 31/115 (2006.01) H01L 31/18 (2006.01)

Patent

CA 2336333

A radiation detection sensor (10) includes a charge storage capacitor (14), a radiation sensitive layer (50) over the charge storage capacitor, and a dielectric layer (52) over the radiation sensitive layer. The dielectric layer has an adjusted resistivity resulting in a time constant = .epsilon.0 between 0.050 and 20 second, wherein is the dielectric constant of the dielectric layer, and .epsilon.0 is the permittivity of free space. The radiation sensitive layer is a photoconductor, and the dielectric layer is, preferably, a linear segmented polyurethane.

L'invention concerne un capteur de détection de radiations (10) qui inclut un condensateur (14), une couche sensible au rayonnement (50) placée sur le condensateur, et une couche diélectrique (52) placée sur la couche sensible au rayonnement. La couche diélectrique présente une résistivité ? corrigée de manière à donner une constante de temps ?=??.epsilon.¿0? comprise entre 0,050 et 20 secondes, ? étant la constante diélectrique de la couche diélectrique, et .epsilon.¿0? la permittivité d'espace libre. La couche sensible au rayonnement est un photoconducteur, la couche diélectrique étant, de préférence, un polyuréthane segmenté linéaire.

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