Search for dissertations about: "Silicon Germanium"

Showing result 11 - 15 of 38 swedish dissertations containing the words Silicon Germanium.

  2. 11. Electrical and optical characterization of deep levels in germanium, silicon and galliumarsenide

    Author : Lars Montelius; Fysiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:1987:Montelius;

    Abstract : [abstract missing].... READ MORE

  4. 12. Technology for photonic components in silica/silicon material structure

    Author : Lech Wosinski; KTH; []
    Keywords : silica-on-silicon technology; PECVD; plasma deposition; photonic integrated circuits; planar waveguide devices; UV Bragg gratings; photosensitivity; arrayed waveguide gratings; multimode interference couplers; add-drop multiplexers;

    Abstract : The main objectives of this thesis were to develop a lowtemperature PECVD process suitable for optoelectronicintegration, and to optimize silica glass composition forUV-induced modifications of a refractive index in PECVDfabricated planar devices. The most important achievement isthe successful development of a low temperature silicadeposition, which for the first time makes it is possible tofabricate good quality low loss integrated components whilekeeping the temperature below 250oC during the entirefabrication process. READ MORE

  5. 13. Phonon dispersion in aluminium, copper, lead, germanium, and silicon measured with neutron crystal spectrometers

    Author : Gunnar Nilsson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : .... READ MORE

  6. 14. Chemical Vapor Depositionof Si and SiGe Films for High-Speed Bipolar Transistors

    Author : Johan Pejnefors; KTH; []
    Keywords : 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;

    Abstract : 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. READ MORE

  7. 15. High Frequency Characterization and Modeling of SiGe Heterojunction Bipolar Transistors

    Author : B. Gunnar Malm; KTH; []
    Keywords : Silicon-Germanium SiGe ; heterojunction bipolar transistor HBT ; low-frequency noise; high-frequency noise; harmonic distortion; linearity; device simulation; collector profile; epitaxial base integration; radio frequency RF ; radio frequency inte;

    Abstract : .... READ MORE