MOISTURE SEAL FOR RADIOLOGICAL IMAGE SENSOR

摘要

A radiation imaging device having a moisture impermeable metal layer compressed against a scintillator layer by compressible layer that is mechanically compressed against the scintillator layer. The metal layer is attached to the scintillator substrate by an adhesive ring surrounding the perimeter of the scintillator substrate. The adhesive can further include moisture getter particles. Preferably the metal layer is comprised of aluminum with a thickness between 25 μm and 100 μm to allow the layer to be flexible as free of pinholes to prevent ingress of moisture. The compressible layer can be compressed by the housing to maintain the metal layer in contact with the scintillator layer. The metal layer not only provides moisture protection for the scintillator but also increases the output of the scintillator by reflecting photons generated by the scintillator layer toward the photodetector array of the radiation imaging device.

主权项

1. A radiation imaging device comprising:
a photodetector array disposed on an imager substrate; a scintillator layer deposited on a scintillator substrate, the scintillator layer having a top surface and a bottom surface, the bottom surface optically coupled to the photodetector array to provide emitted photons to the photodetector array when the top surface is exposed to incident radiation; a metal layer adjacent to the top surface of the scintillator layer, the metal layer covering the scintillator layer to seal the scintillator layer between the metal layer and the scintillator substrate; and a compressible layer that mechanically compresses the metal layer against the scintillator layer.