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A novel monoclinic magnesium tungstate crystal, Tm:MgWO4, was grown and characterized in terms of structure, spectroscopy and laser generation. The output power was 772 mW at 2017–2029 nm with a slope efficiency of 39%.
With wafer fabs running at near full capacity, it is a constant challenge to maintain high yields. Many different products are fabricated by the same equipment. So the sudden change in product yield, a yield excursion, can have a significant impact to many different products. Therefore, it is critical to detect an excursion as early as possible and fix the cause in order to minimize the impact. This...
Outlier screening is a popular approach employed for automotive product lines. There have been many outlier methods proposed. In practice, it is desirable to choose the “best” outlier method. This work develops a notion of applicability associated with an outlier method on a given set of wafers. A measure for applicability is proposed and experiment results are presented to illustrate its effects...
This work studies a data-driven methodology for detecting systematic defects using layout-aware scan diagnosis data. As part of volume diagnosis, this methodology focuses on ranking the most systematic defective signatures, while possible random defects are also present in the wafer. The main analysis components utilize χ2 Independence Tests to establish systematic relationships between reported defective...
This paper presents the modeling and control of a nonlinear two-wheeled inverted pendulum (TWIP) system. We derive the transfer function and design robust controllers for the TWIP system. The designed controllers are implemented on MATLAB/Simulink and on a microcontroller for simulations and experiments, respectively. It is found that the single-loop feedback control structure cannot deal with the...
A Love wave sensor with a phononic parylene-C wave guiding layer is proposed to detect the VEGF secreted during the selective platelet activation process, where arrays of a different material (filling material) are fabricated in the parylene-C films. The effects of the structural design parameters (period width and period number) on the electric response of sensors are investigated. As the period...
Platelets are blood cells that play a critical role in a number of pathophysiological processes. After activation, platelets release a variety of growth factors, including PDGF, VEGF, TGF-β and HGF. Using different agonists, platelets can be selectively activated in different ways. For example, PAR-1 agonist activated platelets release VEGF while PAR-4 agonist activated platelets retain VEGF in them...
This paper develops an iterative searching method to find the optimal power management strategy and component sizes for a hybrid power system that consists of a proton exchange membrane fuel cell, a chemical hydrogen production system, photovoltaic arrays, and a Li-Fe secondary battery set. In order to find the most suitable power management and component sizes, we build a MATLAB/SimPowerSystem simulation...
Wafer reconstitution is a vital process for serving as a buffer to decouple the processing developments between IC fabrication and electronics packaging. By this approach, the IC packaging is then independent from the chip processing. However, such a process brings numerous mechanical loadings during molding and curing phases. Without carefully planning, failures such as die-shifting and excessive...
This paper presents a dynamic gene and transcriptional regulatory network inferring method by using the time-varying autoregressive (TVAR) model. It employs the Li-based regularization terms with spatial sparsity, temporal continuity and proposed multi-Laplacian prior (MLP) for key transcriptional factors (TFs) and their interactions identification. The MLP regularization allows the connections of...
A bidirectional fiber-IVLLC and fiber-wireless convergence system based on two orthogonally polarized optical sidebands for hybrid CATV/MMW/BB signal transmission is proposed and demonstrated. Two orthogonally polarized optical sidebands are transmitted over a 40-km SMF transport to effectively reduce the fiber dispersion and the distortion. The approach presented in this work signifies the advancements...
Automatic target recognition is a crucial task for SAR remote sensing. Unlike other methods, the unsupervised representation learning based on deep architecture can obtain robust high-level features directly from raw data. A drawback of most unsupervised representation learning methods in SAR ATR is that they only deal with amplitude images. In addition, many methods utlize a single layer architecture...
For earth quakes happening in the ocean, the signals will be best picked up by ocean bottom seismometers (OBS) to have their fidelty. The seismic signal picked up by OBS's is often contaminated by the ocean surface waves. In order to separate the noises due to the ocean surface wave, a differential pressure gauge (DPG) is installed on OBS to detect the pressure change purely due to the water body...
Perpendicular Spin-Transfer Torque (STT) MRAM is a promising technology in terms of read/write speed, low power consumption and non-volatility, but there has not been a demonstration of high density manufacturability at small geometries. In this paper we present an unprecedented demonstration of a robust STT-MRAM technology designed in a 2x nm CMOS-embedded 40 Mb array. Key features are full array...
By using a hybrid energy-harvesting mode, a novel self-powered wireless-sensing-node is developed for vibration-type distinguishable environment/event monitoring. The dual-stage piezoelectric vibration energy harvester has threshold-triggered electricity generating function. Such harvesters generate considerable power when the ambient vibration reaches the two preset conditions of acceleration and...
We examine graphene for interconnects within a 7-nm FinFET technology. Multiple scenarios considered alter dimensions and/or materials to reflect realistic graphene interconnect fabrication. Replacement is restricted up to the 3rd BEOL metal layer (M3) as graphene is advantageous over copper in terms of resistivity only for line widths < 30 nm. Initial standard-cell level analysis is extended to...
The RC delay, electro migration (EM) and TDDB performance become more challenges to meet device requirement as continuous geometry shrink on BEOL dual damascene interconnects. To overcome these challenges from interconnect patterning point of view, we proposed Cu subtractive RIE as a potential solution for next generation Cu/Low-k interconnects.
Recently, the rapid prevalence of mobile devices leads to diversified applications of intelligent IoT systems (including connected devices and cloud computing) for services. Better performance and efficiency can be achieved from well planning and utilizing computing resources. In this paper, we try to explain the system development of communication and computing for fall detection. Feature extraction...
Micro-milling, which is one of the mechanical micromachining methods, shows the potential to make very small parts with three dimensional microstructures. However, micro-milling is usually carried out on a traditional machine tool, which has a spindle with several kilowatts. For micro-milling on a traditional machine tool, most power is consumed by friction, not cutting, resulting in waste of energy...
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