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:
Apr. 16, 2013
Filed:
Nov. 29, 2011
Michel Bruel, Veurey Voroize, FR;
Michel Bruel, Veurey Voroize, FR;
Soitec, Bernin, FR;
Abstract
A process for cleaving a substrate for the purpose of detaching a film therefrom. The method includes the formation of a stress-generating structure locally bonded to the substrate surface and designed to expand or contract in a plane parallel to the substrate surface under the effect of a heat treatment; and the application of a heat treatment to the structure, designed to cause the structure to expand or contract so as to generate a plurality of local stresses in the substrate which generates a stress greater than the mechanical strength of the substrate in a cleavage plane parallel to the surface of the substrate defining the film to be detached, the stress leading to the cleavage of the substrate over the cleavage plane. Also, an assembly of a substrate and the stress-generating structure as well as use of the assembly in a semiconductor device for photovoltaic, optoelectronic or electronic applications.