Sökning: "current-voltage measurement"

Visar resultat 1 - 5 av 18 avhandlingar innehållade orden current-voltage measurement.

1. 1. Electrical contacts, Ohmic and Schottky, to 4H-Silicon Carbide for device applications

   Författare :Sang-Kwon Lee; KTH; []
   Nyckelord :silicon carbice; Ohmic; Schottky contacts; co-evaporation; current-voltage; capacitance-voltage measurement; power device; 4H-SiC; TLM;

   Sammanfattning : .... LÄS MER

3. 2. Processing and characterization of GaN/SiC heterojunctions and SiC bipolar transistors

   Författare :Erik Danielsson; KTH; []
   Nyckelord :silicon carbide; gallium nitride; device simulation; bipolar junction transistor; heterojunction; heterojunction bipolar transistor; current-voltage measurement; capacitance-voltage measurement; self-heating;

   Sammanfattning : Silicon Carbide (SiC) and Gallium Nitride (GaN) are bothwide bandgap semiconductors that have been suggested for highpower, high voltage, and high temperature applications. Themost investigated SiC devices so far are the Schottky diode,PiN diode and the field effect transistor. LÄS MER

4. 3. Current measurement by real-time counting of single charges

   Författare :Jonas Bylander; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; array of tunnel junctions; Coulomb blockade; radio frequency single electron transistor; SET oscillations; time correlated tunnelling; metrology; current standard; SET; charge solitons;

   Sammanfattning : The first real-time observation of time correlated single-electron tunnelling is reported in this thesis. This is a direct detection of charge discreteness in an electrical current.When a current, I, flows through a chain of metallic islands, connected by small tunnel junctions, a lattice of charges is formed due to the Coulomb repulsion. LÄS MER

5. 4. Coulomb Blockade Thermometry and Other Aspects of Tunnel Junction Arrays

   Författare :Tobias Bergsten; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : This report describes experimental results on a few different aspects of two-dimensional tunnel junction arrays: Coulomb blockade thermometry (CBT), Hall effect and Josephson array magnetometry (JAM). CBT is a primary thermometry method which is only a few years old. It is suitable for cryogenic temperatures between 20 mK and 30 K. LÄS MER

7. 5. Heterostructure Diodes for Millimeter Wave Power Generation

   Författare :Hans Grönqvist; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Single barrier varactor diode; AlSb barrier; InAs substrate; high frequencies; Resonant Tunneling Diode;

   Sammanfattning : This thesis deals with two types of heterostructure diodes namely the Resonant Tunneling Diode (RTD) and the Single barrier varactor diode (SBV). The RTD is a device for high frequency generation either as a negative reistance oscillators or as a multiplier. Different means to reach high frequencies are outlined. LÄS MER