Patent ID: 11898239
Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Field: Semiconductors (Electrical engineering)
Classification: CPC C  H | IPC C  H

Claim 0:
1. A method for treating a thin film made from a conductive or semiconductive material to improve the crystalline quality thereof, the method comprising:
supplying a substrate comprising, on one of the faces thereof, a thin film of the material; and
biased plasma treating the assembly formed by the substrate and the thin film at a given temperature and for a given time, so as to obtain a crystalline reorganization over a depth of the thin film,
wherein the biased plasma treating comprises an electrical biasing of the thin film and exposing the film thus biased to a hydrogen plasma,
wherein the biased plasma treating is implemented at a temperature that is below the melting points of the thin film and of the substrate,
wherein the hydrogen plasma is obtained from a gas containing solely hydrogen,
wherein the gas is devoid of any precursor of the conductive or semiconductive material of the film,
wherein a time of the exposure of the biased film to the hydrogen plasma is in a range of from 10 minutes to several hours,
wherein, in the supplying, the face of the substrate is monocrystalline and the thin film present on the face is polycrystalline, and
wherein the biased plasma treating is implemented until the polycrystalline film becomes an epitaxial film.