The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Summary The charge conservation laws in general are not strictly obeyed in computational electromagnetics and Magnetohydrodynamics (MHD), due to the presence of various types of numerical errors. In this paper, a field theoretical method for the treatment of the often violated charge conservation laws in computational electrodynamics and MHD has been investigated, which reduces to the well-known hyperbolic...
This paper reports the fabrication method and characteristics of a three dimensional micro interdigital structured supercapacitor. The proposed capacitor was fabricated by using two porous Cu/Ni electrodes with ultra-high surface area. The porous electrodes were formed by using a negative photoresist KMPR for high aspect ratio structure and electroplating technique. The electrochemical performances...
A single-tap concentric photogate pixel of 28 µm pitch is developed for application to time-of-flight (ToF) three dimension (3D) image sensors. The 198×108 ToF pixel array exhibits demodulation contrast higher than 50% and distance error less than 1%, over 1 to 7 m range using 20MHz modulation of 850 nm light emitting diode (LED) illumination.
Extremely miniaturized methanol sensor was successfully developed and characterized. In order to minimize methanol sensor, the sensor was newly fabricated by using two circular porous Au electrodes with Pt nano-particles (micro/nano porous Au-Pt). The micro/nano porous Au-Pt electrode acts as a gas diffusion layer and current collector in the extremely miniaturized methanol sensor. The sensor was...
Highly roughened coral-like porous Au electrode with electroplated Pt nano-particles was newly developed and characterized. The porosity and window-pore size of the fabricated porous Au electrode were approximately 50% and 100-300 nm, respectively. The electroplated Pt nano-particle size was approximately 5-10 nm. For miniaturized electrochemical and biochemical sensor applications, the fabricated...
Flexible enzyme free glucose micro-sensor with nanoporous Pt (platinum) working electrode on a bio-compatible PET (polyethylene terephthalate) film was designed, fabricated, and characterized for continuous monitoring applications. The fabricated flexible sensor showed electrode surface RF (roughness factor) of 106.5 which was much higher than that of the sensor with sputtered Au electrode. The fabricated...
The multilayer films of LiCoO2/M/LiCoO2/M/LiCoO2 structure were prepared by a magnetron sputtering without post-annealing. The as-deposited multilayer films exhibited a nanocrystalline structure, which is similar to that of LiCo2 single layer films. Electrochemical performances of the LiCoO2/M multilayer films and a LiCoO2 single layer film were investigated at a current density ranging from 30 to...
The surface Fermi level unpinning in InGaAs has been realized with high kappa dielectric growth using molecular beam eitaxy (MBE) and atomic layer deposition (ALD). Furthermore, world-record device performances in self-aligned inversion-channel InGaAs MOSFET and a capacitance equivalent thickness (CET) of les 1 nm in Ga2O3(Gd2O3) and ALD-HfO2 on InGaAs have been achieved.
A study was initiated in order to thermally quantify the characteristics of package-on-package (POP), which has been deployed in multiple mobile devices in order to reduce board area and subsequently mobile device size. In most POP scenarios, the memory package is stacked on top of a baseband or application processor and reflowed together. Thermal simulations were conducted for a POP package configuration...
A UWB receiver with carrier that has 400 MHz cut-off frequency, 73 dB dynamic range and -70 dBm input sensitivity was generated in 0.13 um CMOS technology for applying to the both IR and MB-OFDM UWB transceiver. LNA and VGA have the broad gain variation (27 dB and 51 dB respectively) using 2 bit and 6 bit switch control. The 7th order gm-C Chebyshev LPF utilizes the modified Nauta OTA and gyrator...
Extensive personal information is gathered explicitly or implicitly when a customer interacts with a firm. Significant risks are associated with handling such personal information. Providing protection may reduce risk of misuse or loss of private information, but it imposes some costs on the firm and its customers. Risk is associated with improper handling of sensitive customer information. Profits...
One-dimensional (1-D) thermal resistance model has been shown in various works to be a computationally economical alternative to the full three-dimensional (3-D) conjugate heat transfer analysis achievable by computational fluid dynamics (CFD) codes for evaluating the thermal performance of microchannel heat sinks. This simplified 1-D approach is often exploited to obtain the optimum microchannel...
The trends in ecosystem and dynamics of semiconductor SoC industry in Korea are described in this paper. For the past years, the development of SoC (System on Chip) fabless industries has been phenomenal in that the total revenue of fabless companies became remarkably high and a number of major players of which the sales is about $200 million are emerging in Korea. It was mainly on the basis of multimedia...
A sub-THz wave magnetic resonance force microscope (MRFM) has been developed with a CW gyrotron (TE22,8 mode, f~299.23 GHz) at University of Fukui. We have successfully measured the MRFM signal at B>10 T, from the free radical spins in a bis-diphenylene-phenyl-allyl (BDPA) crystal sample attached on a cantilever. Sub-THz wave MRFM will be a key technology to achieve the atomic-scale spatial resolution...
This paper proposes a novel end-to-end congestion control mechanism called TCP NewZag. NewZag is simple and effective in dealing with random packet loss, so it can improve TCP performance in the wireless network. TCP NewZag proposes two new mechanisms: (1) a new end-to-end loss differentiation algorithm (LDA); (2) the adjustments of TCP NewReno multiplicative decrease algorithm. These two mechanisms...
To enable richer consumer experiences, more IC chipsets with various functionalities and greater memory density have been deployed in the limited phone board area. A new generation of surface mount devices such as fine pitch BGA, package-on-package (POP), and wafer-level packaging, are being introduced to reduce board area for the given feature set. Board level reliability of new packages is one of...
Wafer level chip scale packaging (WL-CSP) of connectivity RF components for mobile devices has emerged as a low-cost, enabling technology. WL-CSP devices are electronic components with an exposed die that utilize a ball pitch compatible with standard surface mount technology (SMT) equipments, and common PCB design techniques. WL-CSP allows the devices to be directly mounted on the PCB of portable...
Thermomechanical fatigue and drop performance of wafer level packages (WLP) are two main reliability requirements that prevent the WLPs from scaling up. A comprehensive investigation into the methods that would enable such transition was undertaken. The current qualification involved a package with 5.2 mm times 5.2 mm die and 144 l/Os. The packages were supplied by four vendors who are the leading...
In this paper the scalability of ALD HfO2 in passivating high indium content InGaAs were studied. A capacitance equivalent thickness (CET) of 1.0 nm has been achieved in this work without any surface pretreated process.
We investigate the effects of back-reflection in RSOA-based WDM PON utilizing the remodulation technique. The downstream signal is likely to have severe reflection tolerance (-42 ~ -35 dB), which highly depends on the RSOA gain.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.