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A method for predicting dynamic stability limit of thin-walled workpiece high-speed milling process is described. The proposed approach takes into account the variations of dynamic characteristics of workpiece with the tool position (or machining time). A dedicated thin-walled workpiece representative of a typical industrial application is designed and modeled by finite element method. The curvilinear...
The thermal stability of STT-RAM is measured by multiple techniques and compared with theory. The read disturb rate is found to be determined by the standby thermal stability, but the error rate at target read currents is higher than expected. The implication for the design of 1 Gb STT-RAM is that 10 year room temperature data retention as well as 1000 FIT read disturb error rate requires thermal...
Semi-discretization method is expanded to determine the stability charts of NFDE for milling processes including process damping. The method is based on a special kind of discretization technique with respect to the past effect only. The convergence of approximate method is investigated by the example of delayed Mathieu equation, and stability charts of the damped and neutral delayed Mathieu equation...
In this paper, we present a detailed analysis of our latest statistical MTJ switching data and STT-RAM chip results. We analyze STT-RAM thermal stability and, for the first time, compare the thermal stability parameter obtained from pulse-width dependence measurements with that obtained from read disturb measurements. We also analyze the scalability of STT-RAM, and compare the properties of STT-RAM...
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