ZIB

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

Measurement of n-type dry thermally oxidized 6H-SiC metal-oxide-semiconductor diodes by quasistatic and high-frequency capacitance versus voltage and capacitance transient techniques (1994)

Neudeck, P. ; Kang, S. ; Petit, J. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 75 (1994), S. 7949-7953

add to mindlist on the mindlist

Details

ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: Dry-oxidized n-type 6H-SiC metal-oxide-semiconductor capacitors are investigated using quasistatic capacitance versus voltage (C-V), high-frequency C-V, and pulsed high-frequency capacitance transient (C-t) analysis over the temperature range from 297 to 573 K. The quasistatic C-V characteristics presented are the first reported for 6H-SiC MOS capacitors, and exhibit startling nonidealities due to nonequilibrium conditions that arise from the fact that the recombination/generation process in 6H-SiC is extraordinarily slow even at the highest measurement temperature employed. The high-frequency dark C-V characteristics all showed deep depletion with no observable hysteresis. The recovery of the high-frequency capacitance from deep depletion to inversion was used to characterize the minority-carrier generation process as a function of temperature. Zerbst analysis conducted on the resulting C-t transients, which were longer than 1000 s at 573 K, showed a generation lifetime thermal activation energy of 0.49 eV.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.356583

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Thermosetting epoxy as a moisture-resistant coating for YBa2Cu3O7 (1990)

Guire, M. R. ; Manas-Zloczower, I. ; Tabib-Azar, M. ; [et al.]

Springer

Journal of materials science 25 (1990), S. 2881-2885

add to mindlist on the mindlist

Details

ISSN: 1573-4803

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Abstract Composites of YBa2Cu307−x and a thermosetting epoxy have been fabricated to study the effectiveness of the epoxy as a protective coating against aqueous decomposition of the oxide, and to determine the effects of the polymer on the oxide's superconducting properties. Reaction with water depletes the ceramic of barium, causes cracks perpendicular to the surface, and decreases the volume fraction of superconducting phase. Microstructural studies show that the epoxy coating is an effective barrier against the decomposition of YBa2Cu307−x immersed in 70 ° C water. In addition, resistivity and AC susceptibility measurements indicate that the epoxy has no deleterious effect on the superconducting transition temperature of the ceramic.