Invention Application
- Patent Title: METHOD FOR MANUFACTURING A HYBRID STRUCTURE
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Application No.: US15769690Application Date: 2016-10-17
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Publication No.: US20180309045A1Publication Date: 2018-10-25
- Inventor: Didier Landru
- Applicant: Soitec
- Priority: FR1559993 20151020
- International Application: PCT/FR2016/052674 WO 20161017
- Main IPC: H01L41/313
- IPC: H01L41/313 ; H01L41/083 ; H01L41/053 ; H01L41/08 ; H03H9/02

Abstract:
A method for manufacturing a hybrid structure comprising an effective layer of piezoelectric material having an effective thickness and disposed on a supporting substrate having a substrate thickness and a thermal expansion coefficient lower than that of the effective layer includes: a) a step of providing a bonded structure comprising a piezoelectric material donor substrate and the supporting substrate, b) a first step of thinning the donor substrate to form a thinned layer having an intermediate thickness and disposed on the supporting substrate, the assembly forming a thinned structure; c) a step of heat treating the thinned structure at an annealing temperature; and d) a second step, after step c), of thinning the thinned layer to form the effective layer. The method also comprises, prior to step b), a step a′) of determining a range of intermediate thicknesses that prevent the thinned structure from being damaged during step c).
Public/Granted literature
- US11349065B2 Method for manufacturing a hybrid structure Public/Granted day:2022-05-31
Information query
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