Search for dissertations about: "Urban Forsberg"

Showing result 1 - 5 of 14 swedish dissertations containing the words Urban Forsberg.

  1. 1. CVD Growth of Silicon Carbide for High Frequency Applications

    Author : Urban Forsberg; Erik Janzén; Anne Henry; Christian Brylinski; Linköpings universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material physics with surface physics; Materialfysik med ytfysik;

    Abstract : Silicon Carbide (SiC) is an important wide band gap semiconductor with outstanding electronic properties. With figures of merit far better than silicon, SiC is believed to replace and outcompete silicon in many applications using high frequencies, high voltage and high temperatures. READ MORE

  2. 2. MOCVD growth of GaN-based high electron mobility transistor structures

    Author : Jr-Tai Chen; Erik Janzén; Urban Forsberg; James S. Speck; Linköpings universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : The present work was to improve the overall quality of GaN-based high electron mobility transistor (HEMT) epitaxial structures grown on semi-insulating (SI) SiC and native GaN substrates, using an approach called bottom-to-top optimization. The bottom-to-top optimization means an entire growth process optimization, from in-situ substrate pretreatment to the epitaxial growth and then the cooling process. READ MORE

  3. 3. CVD solutions for new directions in SiC and GaN epitaxy

    Author : Xun Li; Urban Forsberg; Erik Janzén; Henrik Pedersen; Sebastian Lourdudoss; Linköpings universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; CVD; SiC; GaN; epitaxy;

    Abstract : This thesis aims to develop a chemical vapor deposition (CVD) process for the new directions in both silicon carbon (SiC) and gallium nitride (GaN) epitaxial growth. The properties of the grown epitaxial layers are investigated in detail in order to have a deep understanding. READ MORE

  4. 4. Controlled growth of hexagonal GaN pyramids and InGaN QDs

    Author : Anders Lundskog; Erik Janzén; Urban Forsberg; Per-Olof Holtz; Lars-Erik Wernersson; Linköpings universitet; []
    Keywords : ;

    Abstract : Gallium-nitride (GaN) and its related alloys are direct band gap semiconductors, with a wide variety of applications. The white light emitting diode (LED) is of particular importance as it is expected to replace energy inefficient light bulb and hazardous incandescent lamps used today. READ MORE

  5. 5. Growth and Characterization of ZrB2 Thin Films

    Author : Lina Tengdelius; Hans Högberg; Urban Forsberg; Denis Music; Linköpings universitet; []
    Keywords : Zirconium diboride ZrB2 ; Thin film; Magnetron sputtering; Epitaxi; Silicon carbide SiC ;

    Abstract : In this thesis, growth of ZrB2 thin films by direct current magnetron sputtering is investigatedusing a high vacuum industrial scale deposition system and an ultra-high vacuum laboratory scalesystem. The films were grown from ZrB2 compound targets at temperatures ranging from ambient (without external heating) to 900 °C and with substrate biases from -20 to -120 V. READ MORE