Electrical conduction in plasma polymerized thin films of γ‐terpinene

Plasma polymerized γ‐terpinene (pp?GT) thin films are fabricated using RF plasma polymerization. MIM structures are fabricated and using the capacitive structures dielectric properties of the material is studied. The dielectric constant values are found to be in good agreement with those determined from ellipsometric data. At a frequency of 100 kHz, the dielectric constant varies with RF deposition power, from 3.69 (10 W) to 3.24 (75 W). The current density–voltage (J?V) characteristics of pp–GT thin films are investigated as a function of RF deposition power at room temperature to determine the resistivity and DC conduction mechanism of the films. At higher applied voltage region, Schottky conduction is the dominant DC conduction mechanism. The capacitance and the loss tangent are found to be frequency dependent. The conductivity of the pp?GT thin films is found to decrease from 1.39 × 10^?12 S/cm (10 W) to 1.02 × 10^?13 S/cm (75 W) and attributed to the change in the chemical composition and structure of the polymer. The breakdown field for pp–GT thin films increases from 1.48 MV/cm (10 W) to 2 MV/cm (75 W). A single broad relaxation peak is observed indicating the contribution of multiple relaxations to the dielectric response for temperature dependent J?V. The distribution of these relaxation times is determined through regularization methods. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 42318.     

Thermally Induced Viscous Flow of Borophosphosilicate-Glass Thin Films on Stepped Surfaces,Part 2: Generalized Parameters for ULSI Glass Flow Characterization

New flow parameters termed flow effectiveness andthermal budgetare used for the characterization of the thermal flow of borophosphosilicate glass serving as a premetal dielectric in ULSI circuits. Their practical value is discussed. It is concluded that the approach proposed reduces the cost of measurement, facilitates the interpretation of measured data, works for both furnace and rapid thermal annealing, is applicable to ULSI gap filling as well as glass planarization, and enables one to optimize the annealing temperature for thin films of low-fusible multicomponent glasses.     

Separation of molybdenum and rhenium by extraction with mixtures of trioctylamine and aliquat 336 followed by selective stripping

Molybdenum and rhenium may be co-extracted from acidic media by a mixture of trioctylamine (3.2–4.5%) and Aliquat 336 (0.5–1.8%) in kerosene/5% iso-octanol. Molybdenum can be selectively stripped by ammonia or ammonium salts to give an aqueous phase containing 60 g/l Mo and 0.01 g/l Re. Rhenium may then be stripped from the resulting organic phase with 8 M nitric acid to give an aqueous solution containing 7 g/l Re and 0.15 g/l Mo.     

Critical energy of initiation of a multifront detonation

Conclusions On the basis of the theoretical cell model and the experimental data on the emergence of the detonation from narrow channels into a half-space, we have constructed a model of the “direct” initiation of the detonation. The formulas obtained enable us to estimate the critical initiation energy practically for any experimental conditions. As the initial data, in the formulas we use only the density of the mixture, the velocity and dimension of a cell of the self-sustaining detonation, and also the time and space characteristics of the energy generation. The use of the model is based on a relatively simple experimental determination of the cell dimension for the mixture being investigated. In other models available today, for example [1–7], kinetic data on ignition delays are used; the inaccuracy in determining these may lead to considerable errors in the calculation of the initiation energy. A verification of the proposed model on the basis of existing experimental results is difficult because there are not enough data given in the published studies. Depending on the completeness of the information we have shown the quantitative or qualitative agreement between model and experiment. Novosibirsk. Translated from Fizika Goreniya i Vzryva, Vol. 15, No. 6, pp. 94–104, November–December, 1979.     

Comparison of the Features of Electron Transport and Subterahertz Generation in Diodes Based on 6-, 18-, 70-, and 120-Period GaAs/AlAs Superlattices

Semiconductors - A comparison of the features of electron transport in diodes based on 6-, 18-, 30-, 70-, and 120-period GaAs/AlAs superlattices with a similar design is performed. However, the...     

Implementation of Machine Learning for Autonomic Capabilities in Self-Organizing Heterogeneous Networks

The 3GPP’s self-organizing networks (SONs) standards are a huge step towards the autonomic networking concept. They are the response to the increasing complexity and size of the mobile networks. This paper proposes a novel scheme for SONs. This scheme is based on machine learning techniques and additionally adopting the concept of abstraction and modularity. The implementation of these concepts in a machine learning scheme allows the usage of independent vendor and technology algorithms and reusability of the proposed approach for different optimization tasks in a network. The scheme is tested for solving an energy saving optimization problem in a heterogeneous network. The results from simulation experiments show that such an approach could be an appropriate solution for developing a full self-managing future network.