The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2025
Filed:
Jan. 19, 2021
Soitec, Bernin, FR;
Commissariat À L'énergie Atomique ET Aux Énergies Alternatives, Paris, FR;
Frédéric Mazen, Grenoble, FR;
François Rieutord, Grenoble, FR;
Marianne Coig, Grenoble, FR;
Helen Grampeix, Grenoble, FR;
Didier Landru, Le Champ-près-Froges, FR;
Oleg Kononchuk, Theys, FR;
Nadia Ben Mohamed, Echirolles, FR;
Soitec, Bernin, FR;
Commissariat À L'énergie Atomique Et Aux Énergies Alternatives, Paris, FR;
Abstract
A method for preparing a thin layer comprises a weakening step for forming a weakened zone in a central portion of a donor substrate, the weakened zone not extending into a peripheral portion of the donor substrate; a step of joining the main face of the donor substrate to a receiver substrate to form an assembly to be split; and a step of separating the assembly to be split, the separating step comprising a heat treatment resulting in the freeing of the thin layer from the donor substrate at the central portion thereof only. The method also comprises, after the separating step, a detaching step comprising the treating of the assembly to be split in order to detach the peripheral portion of the donor substrate from the receiver substrate.