COATINGS FOR DIGITAL DETECTORS

摘要

Described is a scintillator screen that includes a supporting layer having a phosphor dispersed in a polymeric binder disposed on the supporting layer and a barrier layer disposed on the polymeric binder. The barrier layer includes a non-moisture absorbing polymer selected from the group consisting of polyethylene terephthalate, cellulose diacetate, ethylene vinyl acetate and polyvinyl butyraldehyde. The barrier layer has a thickness of less than 1 micron. An antistatic layer is disposed on the barrier layer. The antistatic layer includes poly(3,4-ethylenedixythiophene)-poly(styrene sulfonate) (PEDOT/PSS) dispersed in a polymer selected from the group consisting of a polyester and a polyurethane. The antistatic layer has a transparency of greater than 95 percent at a wavelength of from about 400 nm to 600 nm.

主权项

1. A scintillator screen comprising:
a support layer; a scintillator layer directly disposed on the support layer, the scintillator layer comprised of a phosphor dispersed in a polymeric binder; a barrier layer disposed on the scintillator layer, the barrier layer comprising a non-moisture absorbing polymer selected from the group consisting of polyethylene terephthalate, cellulose diacetate, ethylene vinyl acetate and polyvinyl butyraldehyde, wherein the barrier layer has a thickness of less than 1 micron; and an antistatic layer having an inner surface and an outer surface, the inner surface of the antistatic layer being disposed on the barrier layer, the antistatic layer comprising a poly(3,4-ethylenedixythiophene)-poly(styrene sulfonate) dispersed in a polymer selected from the group consisting of a polyester and a polyurethane; wherein a transparency of the combination antistatic and barrier layers together is greater than 95 percent at a wavelength of from about 400 nm to 600 nm; and wherein a surface resistivity of the scintillator screen at the outer surface of the antistatic layer is less than 1010 ohms/square.