Sökning: "ferroelectric capacitor"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden ferroelectric capacitor.

  1. 1. Ferroelectric Heterostructures: Growth and Microwave Devices

    Författare :Khaled Khamchane; Chalmers University of Technology; []
    Nyckelord :strontium ruthenate; Permittivity; Capacitor; Loss tangent; Pulsed laser deposition; Ferroelectrics;

    Sammanfattning : .... LÄS MER

  2. 2. SiC CMOS and memory devices for high-temperature integrated circuits

    Författare :Mattias Ekström; Carl-Mikael Zetterling; B. Gunnar Malm; Tobias Erlbacher; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; bismuth titanate Bi4Ti3O12 ; CMOS; ferroelectric capacitor; field oxide; inverter; metallisation; metal oxide semiconductor field effect transistor MOSFET ; ohmic contacts; ring oscillator; semiconductor processing; silicon carbide 4H-SiC ; CMOS; ferroelektrisk kondensator; fältoxid; halvledartillverkning; inverterare; kiselkarbid 4H-SiC ; metallisering; MOSFET; ohmska kontakter; ringoscillator; vismuttitanat Bi4Ti3O12 ; Informations- och kommunikationsteknik; Information and Communication Technology;

    Sammanfattning : High-temperature electronics find use in extreme environments, like data logging in downhole drilling for geothermal energy production, inside of high-temperature turbines, industrial gas sensors and space electronics. The simplest systems use a sensor and a transmitter, but more advance electronic systems would additionally require a microcontroller with memory. LÄS MER

  3. 3. Tunable Bulk Acoustic Wave Resonators Based on BaxSr1-xTiO3 Thin Films

    Författare :John Berge; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; piezoelectric resonators; bulk acoustic wave devices; field induced piezoelectric effect; tunable devices; ferroelectric films;

    Sammanfattning : The main focus of this thesis is the study of a novel component based on ferroelectric BaxSr1−xTiO3 thin films – the tunable thin film bulk acoustic resonator (TFBAR). The tunable TFBAR utilizes a dc field induced piezoelectric effect in the ferroelectric film, in contrast to conventional fixed frequency TFBARs, widely used for filtering applications in wireless communication systems,which are based on ordinary piezoelectric materials. LÄS MER

  4. 4. Processing and On-Wafer Test of Ferroelectric Film Microwave Varactors

    Författare :Jang-Yong Kim; Alexander Grishin; Dag Winkler; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; : ferroelectrics; sodium potassium niobates; silver tantalite niobate; barium strontium titanate; thin films; pulsed laser deposition; rf magnetron sputtering; coplanar waveguide; photolithography; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

    Sammanfattning : Microwave materials have been widely used in a variety of applications ranging from communication devices to military satellite services, and the study of materials properties at microwave frequencies and the development of functional microwave materials have always been among the most active areas in solid-state physics, materials science, electrical and electronic engineering. In recent years, the increasing requirements for the development of high speed, high frequency circuits and systems require complete understanding of the properties of materials function at microwave frequencies. LÄS MER

  5. 5. Switchable and tunable bulk acoustic wave resonators based on BaxSr1-xTiO3 thin films

    Författare :John Berge; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ferroelectric thin films; field induced piezoelectric effect.; tunable microwave devices; bulk acoustic wave devices; piezoelectric resonators;

    Sammanfattning : The main focus of this thesis is the study of a novel microwave component, the tunable thin film bulk acoustic wave resonator (TFBAR), based on ferroelectric BaxSr1-xTiO3 thin films. Conventional fixed frequency TFBARs, widely used for filtering applications in wireless communication systems, are based on ordinary piezoelectrics. LÄS MER