3 ms·
Black phosphorus sheets are great but they are pretty hard to fabricate and they degrade very quickly when they come in contact with air (in a matter of hours).
by alxlaz 8y ago
Black phosphorus sheets are great but they are pretty hard to fabricate and they degrade very quickly when they come in contact with air (in a matter of hours). There have been various attempts to solve this, some of them successful (as far as we can tell from lab experiments, at least), but all solutions are in pretty early stages, and most of them seem pretty difficult to implement on an industrial scale. Basically, exposing the damn thing to anything but inert gases for more than a couple of hours destroys it. That's not too feasible today.
- wbl 8y agoCan the computer in high pressure helium: better thermal conductivity then air. Or space applications.
- dEnigma 8y agoThe topic was replacing silicon. I'm sure there are niche applications for it, but having to seal everything helium-tight won't work for all use cases that are served by silicon chips.
- jcims 8y agoThe silicon is rarely exposed to air though. This is just a manufacturing issue, isnt it?
- dEnigma 8y agoGood point. I have to confess that I didn't think about that. Then again I know very little of how much air a silicon chip is exposed to from manufacturing to actual use in a working system.
- raverbashing 8y agoI suppose so, but it's easier to have your factory with ultra-clean air than have it with inert gases.
- dogma1138 8y agoWith submersion litography and the silicon wafers being in inert gas chambers for annealing to prevent oxidation faults I’m not sure that’s actually the case. You usually don’t want to expose anything to oxygen especially something that is only a few nanometers thick so even if the base silicon does not oxidize (which afaik it does) once you begin the doping process not to mention laying down the metal layers oxygen is a big no no, the oxide layer that form on say copper coins is thicker than the copper layers in most ICs so I really don’t see oxygen as being viable medium during manufacturing. Based on this it seems that when Oxygen is used it’s used as a purge gas https://www.globalspec.com/learnmore/materials_chemicals_adhesives/industrial_specialty_gases/electronic_semiconductor_gases https://www.globalspec.com/learnmore/materials_chemicals_adh...