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One of the growing healthcare needs in Hong Kong is eye disease treatment. We conducted a study at an eye outpatient department of a public hospital and developed a decision support tool based on computer simulation to serve several purposes: (1) identify dynamic bottlenecks, subject to changes in the layout, input parameters, patient scheduling and resources allocation plan, (2) estimate time-based...
Circular SAR (CSAR) has raised an increasing interest in recent years. As a new SAR imaging mode, it has the ability to achieve sub-wavelength resolution for isotropic targets on planar ground and 3-D reconstruction[1]. However the high resolution depends on high accuracy of platform position. For CSAR systems operating at centimeter wavelength, cm-level accuracy Position and Orientation Systems (POS)...
In this paper, we present a 64nm pitch integration and materials strategy to enable aggressive groundrules and extendibility for multi-node insertions. Exploitation of brightfield entitlements at trench and via lithography enables tight via and bi-directional trench pitch. Setting the same mask metal spacing equal to CPP maximized density scaling and speed of standard cell automation by avoiding cell...
We propose and demonstrate a dynamic self-adaptive write method (DSWM) for the first time, which fixes the reliability problem that over-set or over-reset degrades ReRAM endurance and retention of tail bits significantly. The demonstration is carried out on a 128Kb test macro of AlOx/WOx bi-layer ReRAM fabricated based on 0.18µm standard logic Al interconnect. Results show that the mean value of endurance...
Microdisk lasers with active region made of type II GaSb/GaAs quantum dots on the GaAs substrate have been demonstrated. Lasing wavelengths near 1μm was achieved and longer photon lifetime from type II structure also observed.
Non-toxic, colloidal ZnS-AgInS2 (ZAIS) nanoparticles (NPs) were used as the active material in a photodetector for the first time. This demonstrates the optoelectronic properties of ZAIS NPs, and proves its viability in other optoelectronic devices.
RFID system is a growing technology for various applications such as logistics management and automatic object identification, and medicine management. In recent years, it is suggested to combine with in-body wireless communications to reduce medical error and improve quality of live (QOL) of patient. In this paper, we designed the tag antenna which integrates with an integrated circuit (IC) chip...
Materials to replace gold wires in wire bonding devices have been pursued for years in industries for cost reduction. The most important factors, besides the price and electric and thermal performance of the material itself, is the growth rate of the intermetallic compound (IMC) at the interface, which would severely affect the reliability of the devices. In this paper, we studied and analyzed the...
Network management represents one of the most challenging activities in tactical mobile ad hoc networks due to the need for rapid planning and configuration to support a given mission, in the face of large variability in wireless network performance and unpredictable conditions. Traditionally, independent tools, such as network planning and configuration, fault and performance management, and middleware...
This paper presents a high performance capacitive micromachined ultrasound sensor (CMUS) with a large fractional bandwidth (FB) ∼113 % and a low bias voltage of 5 V in an immersion testing of an ultrasonic sensor. The thin polysilicon for the CMOS gate was utilized as a sacrificial layer and the multiple layers of metal and dielectric for the CMOS electric interconnects were used as the structural...
This paper presents optical and sensory properties of ZnO nanofirous layers grown by a cost-effective and fast fabrication method based on magnetron sputtering. The as-prepared nanofibrous layers show good conductive properties which are of interest for gas sensing structures. Their application for hydrogen detection is demonstrated in premiere, and the developed H2 sensor structure exhibits good...
This study is to numerically and experimentally investigate the effect of via-middle Cu through silicon via (TSV) on the mobility change (or related saturated current change, or drive current change) of transistors in the DRAM chip for 3D integration and further determine the keep-out zone (KOZ) in terms of key parameters such as SiO2 layer effect, zero-stress temperature, single and array vias, through...
As device scaling becomes increasingly difficult, 3D integration with through silicon via (TSV) has emerged as a viable solution for addressing the requisite bandwidth and power efficiency challenges. However, mechanical stresses induced by the TSVs must be controlled in the 3D flow in order to preserve the electrical integrity of front-end devices. Since copper filling material of the TSV could causes...
We demonstrated a flexible thin-film CdSe quantum dot (QD) photodetector by sandwiching a piece of QD drop-casted tracing paper between two PEDOT:PSS electrodes printed by a desktop inkjet printer on a transparency film.
A photodetector comprised of a colloidal germanium nanoparticle active material is reported. The non-toxic, heavy-metal free germanium nanoparticles are synthesized from solution and reap the benefits of solution-processing.
Information Classification is the categorization of the huge amount of data in an efficient and useful way. In the current scenario data is growing exponentially due to the rise of internet rich applications. One such source of information is the blogs. Blogs are web logs maintained by their authors that contain information related to a certain topic and also contain authors view about that topic...
Place a Die breaking strength is related to the surface morphology of the die. Existing of the defects on the die backside makes die fracture becomes a more severe problem in the microelectronic package. In this study, impact of the die backside defects on the stress is investigated by mechanical theories. Finite element method and 3 point bending test are used to verify the theory prediction. Thin...
We demonstrated generation of various optical trap spots using a MEMS scanning micromirror with optical tweezers. By controlling the actuation voltage pattern, various focused laser lines and separate laser spots were achieved.
We demonstrate a visible light blinded IR detector by using multi-layers of SiO2/TiO2 dielectric in a Si based MIS structure. High spectral discrimination among visible light range has achieved due to optical filtering by the SiO2/TiO2 multi-layers. Spectral measurements in reflection of SiO2/TiO2 multi-layers in terms of layer number and thickness and their I-V characteristics have been used to study...
In a gate-structured field emission display (FED), the insulator layer is used to keep an electrical insulation between the gate and cathode electrode. The reliability of the insulator layer is an important issue of FED fabrication, especially for large area device. In this study, the insulator layer was prepared using plasma enhanced chemical vapor deposition (PECVD) and the preparation parameters...
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