We assemble metal T.O. cans for photosensors or photodiodes...and the dark current (Id) requirements range from mA to pA. Does Id depend on the application of the device? Another question, I did a recent burn-in on one of the devices but the Id readings were high so our customer advised to repeat the burn-in process. Does repeating the burn-in process lower the high Id readings? The average Id decreased but as for the individual units, the result was erratic (i. e., some units had a lower Id while others had higher).