Patent ID: 7981238
Filing Date: 2011-07-19
Classification: H01L,Y10S

Abstract:
1. A method for relaxing a strained thin film, comprising: obtaining the strained thin film, which is secured via a first main face to an initial support, a second main face of the strained thin film being a contact face; supplying an intermediate support including a polymer layer having a main free contact face, wherein thermal expansion coefficient of the polymer is greater than that of the strained thin film; adhesively bringing into contact the contact face of the strained thin film with the contact face of the polymer layer; provoking relaxation of the strained thin film through formation of wrinkles in the strained thin film by eliminating the initial support and revealing the first main face of the strained thin film; increasing temperature of the polymer layer; stretching the wrinkled thin film and eliminating the wrinkles created during the provoking while the temperature of the polymer layer is increased; securing, while the wrinkles are eliminated in the thin film, the first main face of the thin film with one face of a receiving substrate; and eliminating the intermediate support and obtaining a relaxed thin film integral with the receiving substrate.