Atomic layer deposition
View Patent ↗Substrates are charged with a material by introducing the substrates into an evacuated vacuum container and exposing the surface of the substrates to a reactive gas which is adsorbed on the surface. The exposure is then terminated and the reactive gas adsorbed on the surface is allowed to react. The surface with the adsorbed reactive gas is exposed to a low-energy plasma discharge with ion energy E 10 on the surface of the substrate of 0<E 10 ≦20 eV and an electron energy E eo of 0 eV<E eo ≦100 eV. The adsorbed reactive gas is allowed to react at least with the cooperation of plasma-generated ions and electrons and wherein the density of the resulting material charging on the substrate surface is controlled to have a predetermined density ranging from isolated atoms, to forming a continuous monolayer.
1. A method for producing substrates charged with a material, in which
a) at least one substrate is introduced into an evacuated vacuum container;
b) a surface of the substrate to be charged is exposed to a reactive gas which is adsorbed on the surface;
c) the exposure of the surface to the reactive gas is terminated;
d) the reactive gas adsorbed on the surface is allowed to react, and wherein
d 1 ) the surface with the adsorbed reactive gas is exposed to a low-energy plasma discharge with ion energy E 10 on the surface of the substrate of
0<E 10 ≦20 eV
and an electron energy E eo of
0 eV<E eo ≦100 eV, and
d 2 ) the adsorbed reactive gas is allowed to react at least with the cooperation of plasma-generated ions and electrons and wherein further
e) the density of the resulting material charging on said substrate surface is controlled to be within a range from isolated atoms to a density for forming a continuous monolayer.
2. The method of claim 1 , further comprising performing said controlling by adjusting at least one of a time span of said exposure, amount of reactive gas which is absorbed, time span of exposure to said low energy plasma. intensity or said low energy plasma.
3. The method of claim 1 , further comprising repeating steps b) to e) and thereby generating a hetero-epitaxial deposition or a homo-epitaxial deposition.
4. The method of claim 1 , comprising producing substrates with implanted material or substrates with seed layers or substrates with relaxation buffers.
5. The method of claim 1 , wherein said material comprises Hf.