Nems relay are usually fabrication using surface micromachining techniques typical of microelectromechanical system(MEMS). laterally actuated relay are constructed by first depositing two or more layers of meterial on a silicon wafer. The upper stuctural layer is photolithographically patterned is order to isolated blocks of the uppermost material. The layer below is then selectively etched away, leaving thin structure, such as the relays beam, cantilevered about the wafer and free to band laterally. Acommonsot of meterials used in this process is polysilicon as the upper structure layer and silicon dioxide as the sacrificial lower layer.