Search

This review describes recent experimental developments in the study of nonlinearities for flexural microelectromechanical systems (MEMS) structures. It includes motivation for studying a variety of nonlinear phenomena, highlighting applications where nonlinearities are relevant. Examples are described where nonlinearities are seen as a nuisance, along with techniques used to mitigate the nonlinearities. More recently, efforts to exploit nonlinearities for improved performance have emerged and are also described. After a summary of the theory behind nonlinear mechanisms, the article describes progress in several areas of nonlinearity: engineering nonlinearities to enhance performance, bifurcations and multistability, parametric processes, frequency mixing, nonlinearly coupled resonances, and nonlinear dissipation. [ABSTRACT FROM AUTHOR]

We have demonstrated, for the first time, a novel three-dimensional (3D) memory chip architecture of stacked-memory-devices-on-logic (SMOL) achieving up to 95% of cell-area efficiency by directly building up memory devices on top of front-end CMOS devices. In order to realize the SMOL, a unique 3D Flash memory device and vertical integration structure have been successfully developed. The SMOL architecture has great potential to achieve tera-bit level memory density by stacking memory devices vertically and maximizing cell-area efficiency. Furthermore, various emerging devices could replace the 3D memory device to develop new 3D chip architectures. [ABSTRACT FROM AUTHOR]