Sökning: "semi-insulating silicon"

Visar resultat 1 - 5 av 16 avhandlingar innehållade orden semi-insulating silicon.

  1. 1. Silicon device substrate and channel characteristics influenced by interface properties

    Författare :Mikael Johansson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; channel; attenuation; zro2; interface; traps; semi-insulating; high-k; mos; cross-talk; hfo2;

    Sammanfattning : This thesis is divided in two parts, one dealing with the depleted Si/Si structure, which is a substrate behaving as a semi-insulating material intended for radio-frequency applications and the other concerning high-k gate dielectrics (dielectrics with high dielectric constant) as the replacement for silicon dioxide as MOS gate dielectric.High frequency applications of CMOS integrated circuits, to lower cost, achieve higher performance and richer functionality, depends partly on the possibility to decrease the substrate coupling between different parts of the circuit. LÄS MER

  3. 2. Wafer Bonding - Problems and Possibilities

    Författare :Mats Bergh; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SOI; atomic force microscope; micromechanics; compliant substrates; wafer bonding; semi-insulating silicon; AFM; surface chemistry; diamond; silicon on insulator; aluminium nitride; microelectronics; surface roughness;

    Sammanfattning : The wafer bonding technology offers a unique opportunity to combine different materials. This has been used for the realisation of novel silicon on insulator (SOI) structures. By replacing the buried silicon dioxide layer with a polycrystalline diamond film the thermal properties of the SOI structure are improved. LÄS MER

  4. 3. New Methods in the growth of InP on Si and Regrowth of Semi-insulating InP for Photonic Devices

    Författare :Wondwosen Tilahun Metaferia; Sebastian Lourdudoss; Eric Tournié; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This thesis addresses new methods in the growth of indium phosphide on silicon for enabling silicon photonics and nano photonics as well as efficient and cost-effective solar cells. It also addresses the renewal of regrowth of semi-insulating indium phosphide for realizing buried heterostructure quantum cascade lasers with high power and wall plug efficiency for sensing applications. LÄS MER

  5. 4. Electrical properties of polycrystalline silicon

    Författare :Matts Rydberg; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Materialvetenskap; Materials science; Teknisk materialvetenskap; Elektronik; Electronics;

    Sammanfattning : Polysilicon is used, among other materials, in today's integrated circuits. In this thesis, the structural and electrical properties' of polysilicon thin film resistors have been studied. The aim has been to improve the long-term stability and increase the knowledge concerning grain-boundary related phenomena. LÄS MER

  7. 5. Silicon Carbide Microwave Transistors and Amplifiers

    Författare :Rolf Jonsson; Linköpings universitet; []
    Nyckelord :SiC; MESFET; Physical simulations; Microwave power amplifier; NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : Ibis work deals with silicon carbide (SiC) metal semieonduetor field effect transistors (MESFETs) and microwave amplifiers using them. The wide bandgap (WBG) semiconductors silicon carbide and gallium nitride have a large potential for microwave power generation. LÄS MER