MEMS-CMOS INTEGRATED DEVICES, AND METHODS OF INTEGRATION AT WAFER LEVEL

摘要

A method for forming an integrated semiconductor device includes providing a first wafer, providing a second wafer, and bonding the first wafer over the second wafer. The first wafer includes a first substrate having a microelectromechanical system (MEMS) device layer. The second wafer includes a second substrate having at least one active device, and at least one interconnect layer over the second substrate. The MEMS device layer is connected with the at least one interconnect layer. The method further includes forming at least one conductive plug through the first substrate and the MEMS device layer and inside the at least one interconnect layer, etching the second substrate and the at least one interconnect layer to form a cavity extending from a surface of the second substrate to the MEMS device layer, and etching the first substrate and the MEMS device layer to form a MEMS device interfacing with the cavity.