Growth and Characterization of Micro-crystalline Silicon-germanium and Silicon-carbon Films PDF Download
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Author: Karl Robert Erickson
Publisher:
ISBN:
Category :
Languages : en
Pages : 124
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Book Description
This thesis reports on the growth chemistry and appropriate process parameters that result in the formation of micro-crystalline silicon-germanium and silicon-carbon films. The growth technique uses an electron-cyclotron-resonance-chemical-vapor-deposition apparatus. This apparatus allows the process engineer to control such parameters as the plasma resonance plane, substrate temperature, microwave power, vacuum pressure, gas flow ratios, and gas combinations. The plasma gas is hydrogen and the precursor gases are silane and germane. The hydrogen ions and electrons in the plasma dissociate the precursor gases into radicals that give rise to film growth on the substrate. The substrate temperatures are kept below 300 C so that deposition on polyimide substrates can be performed.
Author: Karl Robert Erickson
Publisher:
ISBN:
Category :
Languages : en
Pages : 124
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Book Description
This thesis reports on the growth chemistry and appropriate process parameters that result in the formation of micro-crystalline silicon-germanium and silicon-carbon films. The growth technique uses an electron-cyclotron-resonance-chemical-vapor-deposition apparatus. This apparatus allows the process engineer to control such parameters as the plasma resonance plane, substrate temperature, microwave power, vacuum pressure, gas flow ratios, and gas combinations. The plasma gas is hydrogen and the precursor gases are silane and germane. The hydrogen ions and electrons in the plasma dissociate the precursor gases into radicals that give rise to film growth on the substrate. The substrate temperatures are kept below 300 C so that deposition on polyimide substrates can be performed.
Author: Gudrun Kissinger
Publisher: CRC Press
ISBN: 1466586648
Category : Science
Languages : en
Pages : 436
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Book Description
Despite the vast knowledge accumulated on silicon, germanium, and their alloys, these materials still demand research, eminently in view of the improvement of knowledge on silicon–germanium alloys and the potentialities of silicon as a substrate for high-efficiency solar cells and for compound semiconductors and the ongoing development of nanodevices based on nanowires and nanodots. Silicon, Germanium, and Their Alloys: Growth, Defects, Impurities, and Nanocrystals covers the entire spectrum of R&D activities in silicon, germanium, and their alloys, presenting the latest achievements in the field of crystal growth, point defects, extended defects, and impurities of silicon and germanium nanocrystals. World-recognized experts are the authors of the book’s chapters, which span bulk, thin film, and nanostructured materials growth and characterization problems, theoretical modeling, crystal defects, diffusion, and issues of key applicative value, including chemical etching as a defect delineation technique, the spectroscopic analysis of impurities, and the use of devices as tools for the measurement of materials quality.
Author: Suibin Zhang
Publisher:
ISBN:
Category :
Languages : en
Pages : 150
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Book Description
Author: Yung Moo Huh
Publisher:
ISBN:
Category :
Languages : en
Pages : 72
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Book Description
A high rate growth method of hydrogenated microcrystalline silicon, [Mu]c-Si:H, and silicon-germanium, [Mu]c-(Si, Ge):H, has been developed with very low hydrogen dilution ratio on foreign substrates, using a remote electron cyclotron resonance - plasma enhanced chemical vapor deposition (ECR-PECVD) process. In this work, the key variable was the hydrogen dilution, ratio of hydrogen to silane, [H2]/[SiH4], which ranged from 3.3 to 10, adding helium systematically. Phase transition from amorphous to microcrystalline states was observed as the amount of added helium was varied. It has been found that hydrogenated microcrystalline silicon films with more than 70 % of crystalline volume fraction were formed at high growth rates of 3.2 Å/sec at low substrate temperature below 300°C from the mixture of silane and hydrogen with a low hydrogen dilution ratio of as low as 3.3. The addition of helium did not increase the growth rate significantly, but it quickly served as disrupting microcrystalline formation. In addition, the substrate temperature-dependent phase transition was observed. The structural, electrical and optical properties, by Raman shift, x-ray diffraction, dark and photo conductivity, activation energy of dark conductivity, and photosensitivity measurements, were investigated to grow good quality [Mu]c-Si:H films at the low hydrogen dilution ratio with high growth rates. The prominent peaks at 520 cm−1 from Raman Shift spectroscopy, crystalline peaks from x-ray diffraction pattern, small photosensitivity, and low activation energy of dark conductivity due to grain boundaries in microcrystalline silicon thin films indicated the characteristic of crystalline materials.
Author: Binod Kumar Dugar
Publisher:
ISBN:
Category :
Languages : en
Pages : 224
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Author: S. Pantellides
Publisher: CRC Press
ISBN: 9781560329633
Category : Technology & Engineering
Languages : en
Pages : 552
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Book Description
Carbon (C) and Silicon Germanium (SiGe) work like a magic sauce. At least in small concentrations, they make everything taste better. It is remarkable enough that SiGe, a new material, and the heterobipolar transistor, a new device, appear on the brink of impacting the exploding wireless market. The addition of C to SiGe, albeit in small concentrations, looks to have breakthrough potential. Here, at last, is proof that materials science can put a rocket booster on the silicon-mind, the silicon transistor. Scientific excitement arises, as always, from the new possibilities a multicomponent materials system offers. Bandgaps can be changed, strains can be tuned, and properties can be tailored. This is catnip to the materials scientist. The wide array of techniques applied here to the SiGeC system bear testimony to the ingenious approaches now available for mastering the complexities of new materials
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
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Author: Zhenjiang Yu
Publisher:
ISBN:
Category :
Languages : en
Pages : 150
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Author: Bagher Bahavar
Publisher:
ISBN:
Category : Crystal growth
Languages : en
Pages : 308
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Author: Haojie Yuan
Publisher:
ISBN:
Category :
Languages : en
Pages : 362
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