05-19-2012 07:05 AM
Have you tried typing your question into Google? If not you should before posting.
Too many results? Try adding site:www.xilinx.com
05-19-2012 11:12 AM
>I do not understand the fasciantion
High energetic particles intrude most kinds of ecapsulation whilest they are absorbed by e.g. Bor-doped silicon and can cause secondary photons with wave lengths in the range of visible light. Anyway the metal coating / top metal mask of silcon devices is usally not that thick to be resistive against photons.
Well this all applies to a more or less uncommon usage of devices in special fields or outside of the atmosphere in satelite applications.
One effect, we observed was with system of several stacked PCBs with some FPGAs and MCUs each. Heavy Ions passed the shielding, the first and also the second PCB. Most of the negative effects had been observed in the PCB at the thierd position, while number 4 and 5 were fine again, due to Bragg Peak behavior.
So this is very fascinating. :-)