Search for dissertations about: "PH3"

Found 3 swedish dissertations containing the word PH3.

  2. 1. Generation of Retinal Neurons : Focus on the Proliferation and Differentiation of the Horizontal Cells and their Subtypes

    Author : Henrik Boije; Finn Hallböök; Paul Layer; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; FoxN4; Ptf1a; PH3; G2-phase; Cell cycle arrest; Differentiation; Fate; Commitment; Neurogenesis; Follistatin; Neuroscience; Neurovetenskap; Neuroscience; Neurovetenskap;

    Abstract : We have used the chicken retina as a model for investigating cell cycle regulation and cell fate commitment during central nervous system development. This thesis focuses on the characterization of and commitment to the horizontal cell fate in the retina. READ MORE

  4. 2. Ion beam etching of InP based materials

    Author : Carl-Fredrik Carlström; KTH; []
    Keywords : InP; dry etching; ion beam etching; RIBE; CAIBE; hydrocarbon chemistry; trimethylamine; As P exchange reaction; morphology; low damage; AFM; SCM; annealing;

    Abstract : Dry etching is an important technique for pattern transferin fabrication of most opto-electronic devices, since it canprovide good control of both structure size and shape even on asub-micron scale. Unfortunately, this process step may causedamage to the material which is detrimental to deviceperformance. READ MORE

  5. 3. 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