Sökning: "chemical vapor deposition"

Visar resultat 21 - 25 av 148 avhandlingar innehållade orden chemical vapor deposition.

1. 21. Theoretical Routes for c-BN Thin Film Growth

   Författare :Johan Karlsson; Karin Larsson; Sven Ulrich; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cubic boron nitride; chemical vapor deposition; density functional theory; Chemistry with specialization in Inorganic Chemistry; Kemi med inriktning mot oorganisk kemi;

   Sammanfattning : Cubic boron nitride (c-BN) has been in focus for several years due to its interesting properties. The possibility for large area chemical vapor deposition (CVD) is a requirement for the realization of these different properties in various applications. Unfortunately, there are at present severe problems in the CVD growth of c-BN. LÄS MER

3. 22. Physical vapor deposition and thermal stability of hard oxide coatings

   Författare :Ludvig Landälv; Per Eklund; Emmanuelle Göthelid; Björn Alling; Marcus Morstein; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : The state-of-the-art tools for machining metals are primarily based on a metal-ceramic composite (WC-Co) coated with different combinations of carbide, nitride, and oxide coatings. Combinations of these coating materials are optimized to withstand specific wear conditions. LÄS MER

4. 23. Theoretical Routes for c-BN Thin Film Growth

   Författare :Johan Karlsson; Karin Larsson; Sven Ulrich; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cubic boron nitride; chemical vapor deposition; density functional theory; adsorption; abstraction; Inorganic Chemistry; Oorganisk kemi;

   Sammanfattning : c-BN has been in focus for several years due to its interesting properties. The possibility for large area CVD is a requirement for the realization of these different properties in various applications. Unfortunately, there are at present severe problems in the CVD growth of c-BN. LÄS MER

5. 24. Preparation and characterization of an organic-based magnet

   Författare :Elin Carlegrim; Mats Fahlman; Svante Svensson; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Organic-based magnets; spintronics; photoelectron spectroscopy; near edge x-ray absorption fine structure spectroscopy; chemical vapor deposition; physical vapor deposition; Material physics with surface physics; Materialfysik med ytfysik;

   Sammanfattning : In the growing field of spintronics there is a strong need for development of flexible lightweight semi-conducting magnets. Molecular organic-based magnets are attractive candidates since it is possible to tune their properties by organic chemistry, making them so-called “designer magnets”. LÄS MER

7. 25. Chemical Vapor Depositionof Si and SiGe Films for High-Speed Bipolar Transistors

   Författare :Johan Pejnefors; KTH; []
   Nyckelord :chemical vapor deposition CVD ; bipolar junction transistor BJT ; heterojunction bipolar transistor HBT ; silicon-germanium SiGe ; epitaxy; poly-Si emitter; in situ doping; non-selective epitaxy NSEG ; loading effect; emissivity effect;

   Sammanfattning : This thesis deals with the main aspects in chemical vapordeposition (CVD) of silicon (Si) and silicon-germanium (Si1-xGex) films for high-speed bipolar transistors.In situdoping of polycrystalline silicon (poly-Si)using phosphine (PH3) and disilane (Si2H6) in a low-pressure CVD reactor was investigated toestablish a poly-Si emitter fabrication process. LÄS MER