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In TANOS stuctures in retention, the major decrease in the programmed threshold voltage is found to be caused by the Vt sensing (IdVg measurements) rather than by intrinsic charge loss (when no bias is applied). This Vt decrease can be understood within the process of the temperature-activated charge transport through the Al2O3 blocking oxide. The charge loss can be minimized when Vt sensing time...
We demonstrate best in class performance for MANOS-type charge-trap flash non-volatile memory devices through improved program/erase (P/E), endurance and retention. Band-engineered (BE) tunnel-oxides (TO) and BE-SiNx charge-trap layers are employed to optimize program, erase, and endurance with trade-off in retention. However, for the 1st time we combine BE-TO, BE-SiNx, BE-blocking layer (BE-BL) and...
In this paper, an undulated micro-electrode array (MEA) on polyimide is fabricated and evaluated for retinal prosthesis. The undulated MEA consists of the individual micro-electrodes having arrowhead shapes and varying heights of 50 ~150 mum. The proposed device is implanted in a rabbit eye, and an optical coherent tomography (OCT) image is taken. The OCT image shows that the implanted MEA contacts...
We demonstrate for the first time molybdenum based oxygen-bearing electrodes for improved performance in MANOS (Metal-Alumina-Nitride-Oxide) charge-trap NVM, and also MIM-DRAM type devices. The meta-stable high work- function (Wfn) molybdenum-oxynitride (MoON) electrodes result in improved retention and erase saturation for the charge trap NVM devices and improved leakage for the MIM devices. Although...
The neurotrophic effects of Nerve growth factor (NGF) on basal forebrain cholinergic neurons are well established. However, its potential actions as a fast-acting neuromodulator and the related receptor are not as well understood. The aim of this study is to investigate NGF-induced spatiotemporal neuronal activity changes in cultured rat organotypic hippocampal slices (OHCs), using a multielectrode...
A deep back chamber micro-electro-mechanical system (MEMS) acoustic sensor with two sacrificial layers based on surface micromachining on a GaAs substrate is presented. As it is designed to be implemented on only the front side of a substrate in order to satisfy the need for a simple monolithic integrated process, this sensor has bottom electrode anchors fabricated using the first sacrificial layer...
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