5 ms·
Re strain, sometimes you want that! It can be used to tune nanoparticles for example.
by PhotonHunter 9mo ago
Re strain, sometimes you want that! It can be used to tune nanoparticles for example.
- adrian_b 9mo agoTrue. All MOS transistors used in the modern CMOS processes used for instance to make CPUs are doped with germanium in their gate regions, in order to produce a strain in the silicon lattice. While a little strain can be beneficial in some cases, the large strain caused by the mismatches in crystal lattice cell size between various semiconductor layers that must be deposited one over the other in order to make some semiconductor device can cause great problems during manufacturing, by generating various defects that may make the process yield unacceptable. Because of this, when researching new semiconductor materials a lot of effort is dedicated for finding compositions that can have matched lattice cell sizes.
- PhotonHunter 9mo agoI can't speak to the meso or macro regimes, but for nano (and in my case, colloids) dislocations are certainly a problem.