Patent ID: 9679777
Date: 2017-06-13
CPC Classifications: H01L,Y02E

Claim:
1. A method for separating a structure from a substrate through electromagnetic irradiations belonging to a spectral range, the separation method having the steps of: a) providing the substrate, the substrate being transparent in the spectral range, b) forming at least one separation layer on the substrate, the spectral range of the electromagnetic irradiations (EI) being adapted such that the separation layer(s) are absorbent in the spectral range, c) forming the structure to be separated on the separation layer(s), d) exposing the separation layer(s) to the electromagnetic irradiations via the substrate during an exposure period at a given power density such that the separation layer(s) break down under the effect of the heat stemming from the absorption of the electromagnetic irradiations, wherein the separation method being comprises a step b1) of forming a thermal barrier layer on the separation layer(s), the spectral range of the electromagnetic irradiations being adapted such that the thermal barrier layer is transparent in the spectral range, the exposure period and the thickness of the thermal barrier layer being adapted such that the temperature of the structure to be separated remains below a threshold temperature during the exposure period, beyond which threshold temperature, faults are likely to appear in the structure, step c) being executed such that the structure to be separated is formed on the thermal barrier layer.