On 23/09/17 15:49, Phil Turmel wrote: > If thermal stress doesn't kill them, then dopant diffusion within the > semiconductors eventually will. This occurs even when turned off, but > proceeds much faster at elevated temperatures. Dopant concentrations > are engineered to not suffer from diffusion effects well beyond the > expected life of the components (at rated operating temps), but that > doesn't mean there aren't marginal production runs. Which can be hard > to discover before parts start failing years later. If that happens > after the warranty period, the manufacturer has dodged a big bullet. > With a bit of tarnish on their name, of course. And as manufacturers shrink their die sizes, dopant diffusion and quantum leakage become much bigger problems :-( If your transistor is only four or five atoms deep, it won't have many dopant atoms, and they only have to diffuse a short distance before your transistor is toast. Cheers, Wol -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
