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As one of the basic insulating materials, polyimide films have been widely used in the insulation system in wind turbine generators. However, the pulse voltage from the converter often causes overvoltage and localized high electrical field in the insulation system. Surface charge could affect the dielectric property and cause the breakdown of insulation. Direct fluorination is a method to modify the...
We report a study of Bi2Te3 films synthesized by chemical vapor deposition (CVD) method on amorphous glass substrates. The Bi2Te3 films with metallic or semiconducting behavior were prepared. The magneto-transport property in Bi2Te3 films with different level of resistivity was studied. These films exhibit a classical linear magneto-resistance effect which is controlled by the resistivity level.
MnTe is a kind of antiferromagnetic semiconductor with Néel temperature (TN) of 307 K [1]. Mn1−xCrxTe was investigated as diluted magnetic semiconductor [2]. The structure, magnetic and transport properties of MnTe [3] and Mn1−xCrxTe [4,5] films were investigated. In these previous works, some of the films represent different characteristic from the bulk ones, such as ferromag-netism at room temperature...
We have investigated the low-frequency noise and the sheet resistance of Al-doped ZnO thin films deposited by DC sputtering technique on glass substrate at different temperature. We characterized the noise below 100 kHz and obtained 1/f spectra. The 1/f noise normalized for bias, frequency and unit area, Cus is proportional with the sheet resistance Rsh• Sheet resistance decreases with the increasing...
ZnO films were deposited by de sputtering technique on glass and Pt/Si substrates. The effect of growth parameters is investigated on sheet resistance and noise. The 1/f noise normalized for bias, frequency and unit area, Cus is proportional with the sheet resistance Rsh• We found that the noise results correlate strongly with the crystalline structure of ZnO. For comparison, we have also studied...
In this work, we investigate the influence of incorporation Zirconia (ZrO2) in gate dielectric HfO2 on electrical properties and the reliability of nMOSFET for the 28nm technology node. Detailed film physical, chemical and optical properties of Hf1−xZrxO2 as a function of Zr content were studied using HRTEM, AR-XPS, spectroscopic ellipsometer. Compared to HfO2, Hf1−xZrxO2 provides lower C-V hysteresis,...
We have investigated the low-frequency noise of ZnO film deposited by dc sputtering technique on glass substrate. We characterized the noise below 100kHz and obtained classical 1/ƒ spectra. We attempted to verify the validity of Hooge's empirical relation and to test its usefulness as a diagnostic tool. The 1/ƒ noise normalized for bias, frequency and unit area, Cus is proportional with the sheet...
In this work, we report on ZrO2 position effect of ALD HfZrOx gate dielectric with a La2O3 capping layer for gate-first flow. The basic electrical characteristics of devices were compared with different ZrO2 position in HfZrOx dielectric. Experimental results show : (1) Under top La2O3 capping layer for n-type Metal-Oxide-Silicon capacitor (nMOSCAP) device, ZrO2 position on both of top and bottom...
A simple method is described to protect polycrystalline silicon (polysilicon) from electrochemical corrosion which often happens when the Micro-Electro-Mechanical systems (MEMS) device is released in HF-based solutions, especially when the device contains noble metal. We propose to employ a photoresist (PR) layer to cover the noble metal layer, which electrically contacts with the underlying polysilicon...
In this paper, the integration of a flexible RFID tag with an inkjet-printed Single Walled Carbon Nanotube (SWCNT) film in a chipless sensor node for toxic gas detection was introduced for the first time. The whole module is realized on a "green" low-cost paper substrate. Carbon nanotube composites change their electric properties (e.g. resistance, dielectric properties) in the presence...
In this study, the impact of ultrastiff diamond surface topographies on osteoblast (bone forming cells, OB) responses (proliferation, spreading and filopodia extension) was studied using both experimental and modeling approaches. Ultrastiff diamond films with varied grain sizes (from less than 100 nm to approximately 600 nm) but similar surface chemistry and wettability were fabricated. Surface topography...
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