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This paper reports a hermetic MEMS package structure with silicon wafer as bonded cap at wafer-level scale. CMP followed by spraying chemical smoothing process is utilized to thin the N(100) silicon cap wafer to the thickness of 150 mum after wafer-level Cu/Sn isothermal solidification bonding. Method for the thinning process and parameters for Cu/Sn isothermal solidification bonding process are researched...
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