Abstract
Using two highly efficient inhibitors, one for silicon and one for SiO2 and SiN it is possible by varying the hydrogenperoxide concentration to achieve tuneable formulated chemistry concerning selectivity. So, the same formulation can be used for the selective etching of SiGe25 vs. Si like for GAA applications as well as for the selective etching of SiGe40 vs. SiGe20 like for CFET applications.
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