Integration of NEMS resonators in a 65nm CMOS technology
In this work we study the feasibility to obtain the smallest CMOS-NEMS resonator using a sub-100nm CMOS technology. The NEMS resonators are defined in a top-down approach using the available layers of the 65nm CMOS technology from ST Microelectronics. A combination of dry and wet etching is developed in order to release the NEMS in an in-house post-CMOS process. Two different NEMS resonators are designed: 60nm100nm polysilicon and 90nm180nm copper clampedclamped beams. The designed polysilicon CC Beam with a length of 1.5?m, resonates at 232MHz and is capable to provide the same mass sensitivity than a bottom-up silicon nanowire.
nems resonators cmos-nems rf-mems releasing process mass sensor