73



 120



 100

 -- as-deposited half-
 stack
 E 80 -
 -. as-deposited full-
 I..
 c stack

 0 60



 M 40




 20





 0 50 100 150 200 250
 Voltage (V)



Fig 4.13 Capacitance vs. voltage curves for as-deposited ZnS:TmF3 half-stack vs. full-
 stack devices.