Method for transferring a thin film comprising a step of generating inclusions
First Claim
1. A process for forming a thin film of material from a substrate, comprising the steps of:
- (a) forming a gaseous compound trap zone implantation of a layer of inclusions in the substrate at a depth corresponding to a required thickness of the thin film;
(b) treating the substrate so as to introduce into the layer of inclusions, a dose of gaseous compounds sufficient to cause formation of micro-cavities in a fracture plane along which the thin film can be separated from the remainder of the substrate, the introduction of gaseous compounds involving a step of implantation of said gaseous compounds; and
(c) separating and recovering the thin film from the substrate along the fracture plane wherein the substrate is placed in intimate contact with a support to which the thin film will bond after separation from the remainder of the substrate.
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Abstract
A process for transfer of at least one thin film of solid material delimited in an initial substrate. The process includes a step in which a layer of inclusions is formed in the initial substrate at a depth corresponding to the required thickness of the thin film. These inclusions are designed to form traps for gaseous compounds which subsequently are implanted. In a subsequent step gaseous compounds are implanted in a manner to convey the gaseous compounds into the layer of inclusions. The dose of implanted gaseous compounds is made sufficient to cause the formation of micro-cavities to form a fracture plane along which the thin film can be separated from the remainder of the substrate.
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Citations
19 Claims
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1. A process for forming a thin film of material from a substrate, comprising the steps of:
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(a) forming a gaseous compound trap zone implantation of a layer of inclusions in the substrate at a depth corresponding to a required thickness of the thin film;
(b) treating the substrate so as to introduce into the layer of inclusions, a dose of gaseous compounds sufficient to cause formation of micro-cavities in a fracture plane along which the thin film can be separated from the remainder of the substrate, the introduction of gaseous compounds involving a step of implantation of said gaseous compounds; and
(c) separating and recovering the thin film from the substrate along the fracture plane wherein the substrate is placed in intimate contact with a support to which the thin film will bond after separation from the remainder of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification