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To meet future 3D stacking requirements on wafer-to-wafer level, we successfully demonstrate oxide-oxide direct bonding on 200 mm with and without copper level utilizing face-to-face alignment and bonding within one process module as well as on the same chuck.
SiO2/SiO2 direct wafer bonding and BCB bonding have been compared to realize membrane GalnAsP wired waveguides on Si Substrate. Bonding environment and pressure were essential for BCB bonding and SiO2 direct bonding, respectively.
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