Patent ID: 8405035

Claim:
A method of fabricating a radiation detector, comprising: providing an evaporation apparatus comprising an evaporation chamber having a first end portion with a substrate positioned in a holder, and a second end portion with a first source boat laterally spaced from a second source boat, and one or more chamber walls at least partially disposed between the first and second end portions; positioning a dopant charge in the first source boat and a main scintillator component charge in the second source boat; and depositing a scintillator film on a surface of the stationarily positioned substrate, the scintillator film having a dopant concentration varying along a length or thickness of the deposited material, wherein the first source boat and second source boat are positioned in the evaporation chamber so as to allow deposition of the scintillator film having a dopant concentration varying along a length or thickness of the deposited material, and wherein the film is deposited by a process comprising applying heat to the evaporation chamber so as to vaporize dopant and main scintillator material for film deposition while maintaining a temperature relationship of T wall >T source >T substrate for at least a portion of the deposition process.