University of California-Berkeley – Page 3

Characterization of Microscale Material Behavior with MEMS Resonators

White C.D., Xu R., Sun X., Komvopoulos K., University of California-Berkeley, US

The reliability of MEMS devices greatly depends on precise characterization of material behavior at the micron scale. This paper presents a novel material characterization device for fatigue testing. The fatigue specimen is subjected to multi-axial [...]

Complex Fluid Dynamics in BioMEMS Devices: Modeling of Microfabricated Microneedles

Liepmann D., University of California-Berkeley, US

MEMS technologies promises to revolutionize health care by providing precise control of biological fluids for both diagnoses and treatments. For example, microneedles can be used for sample collection for biological analysis, delivery of cell or [...]

Complex Fluid Dynamics in BioMEMS Devices

Liepmann D., University of California-Berkeley, US

MEMS technologies promises to revolutionize health care by providing precise control of biological fluids for both diagnoses and treatments. For example, microneedles can be used for sample collection for biological analysis, delivery of cell or [...]

A Comparative Study of Double-Gate and Surrounding-Gate MOSFETs in Strong Inversion and Accumulation Using an Analytical Model

Chen Y., Luo J., University of California-Berkeley, US

An analytical model for the electric characteristics of ultrathin double-gate and surrounding-gate MOSFETs in strong inversion and accumulation is presented. The analytical solutions to the 1-D simplified Poisson's equation in both Cartesian and cylindrical coordinates [...]

Nonlinear Mechanics of Suspension Beams for a Micromachined Gyroscope

Davis W.O., Pisano A.P., University of California-Berkeley, US

We present a method for the calculation of the coefficients of cubic stiffening for tether-suspended micromachined systems. The analysis is based on a nonlinear rod theory, and enables the prediction of the maximum achievable motion [...]

Modeling of Blood Flow in Simple Microchannels

Trebotich D., Chang W., Liepmann D., University of California-Berkeley, US

Optimal design of medical micro-assay systems will require computational modeling capabilities. Most existing models are based on macroscale experiments with smallest length dimensions comparable to that of a capillary due to the fact that the [...]

Modeling and Simulation of Micromachined Gyroscopes in the Presence of Imperfections

Shkel A., Howe R.T., Horowitz R., University of California-Berkeley, US

This paper studies behavior of non-ideal vibratory micromachined gyroscopes. The use of methods of motion decomposition [1] is the essence of the proposed analytical approach. The method is based on partitioning the equations of motion [...]

Characterization of DNA Flow through Microchannels

Shrewsbury P.J., Muller S.J., Liepmann D., University of California-Berkeley, US

Advances in silicon fabrication technology enable the reproduction of laboratory apparatus, and theoretically biochemical processes, on a microscale. The implementation of this technology, however, necessitates additional study as fluid dynamics change at this scale and, [...]