Shielded X-Ray Detector with Improved Image Quality Stability

An x-ray imaging system comprising:

• a. an x-ray source;
• b. an x-ray imaging detector positioned to receive radiation emitted from the x-ray source through an object positioned between the x-ray source and the x-ray imaging detector;
• and
• c. a system controller operably connected to the x-ray source and the x-ray detector to control the operation of the x-ray source and the x-ray imaging detector;
• the x-ray imaging detector comprising:
• i. a substrate;
• ii. read out electronics disposed on the substrate and operably connected to the system controller;
• iii. a photosensor disposed on the substrate and operably connected to the read out electronics, the photosensor comprising at least one photosensitive element and a data transfer line operably connected between the at least one photosensitive element and the read out electronics;
• iv. a dielectric layer disposed on the substrate over the data transfer line and the at least one photosensitive element;
• v. a shield layer disposed on the dielectric layer opposite the substrate over the data transfer line;
• and
• vi. a scintillator layer disposed on the shield layer opposite the dielectric layer.

A method of forming an x-ray imaging detector comprising the steps of:

• a. forming an array of photosensitive elements on a substrate layer, each photosensitive element including a photodiode and a thin film transistor;
• b. forming data transfer lines on the substrate layer, the data transfer lines operably connected to each of the photosensitive elements;
• c. forming a dielectric layer over the array of photosensitive elements and the data transfer lines;
• d. forming a shield layer over the dielectric layer;
• e. forming a scintillator layer over the shield layer;
• and
• f. forming a sealing layer over the scintillator layer.