FIREMAN Or stolen from American institutions ?????
Assuming much? Scientific papers have been published on these, so the general ideas are out there – no need to misappropriate them. And because Si’s limitations or shortcomings, there’s a constant search for other, suitable semiconductors that are better in certain respects. For example, there are now devices made with GaAs or GaN, and the latter can work up to around 400 °C vs. about 150 °C for Si, and around 70 °C or so for Ge.