Processing of Alumina Nano-films
Typ dokumentupříspěvek z konference - elektronický
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There are different technologies for processing of alumina thin films. It has been found that only some of them are usable for reliable and reproducible processing of nano-films with the thickness of 2 through 3 nm. Such the films are used for fabrication of tunneling junctions with high sensitivity to humidity, which can be used for fabrication of humidity sensors. The alumina films are mostly prepared on evaporated or sputtered aluminum electrode by oxidization. Quality of tunneling junctions with alumina tunneling barrier fabricated of air-oxidized, oxygen-oxidized and oxygen plasma-oxidized Al electrodes has been examined by the measurement of resistances and capacitances of the junctions. Sensitivity of the junctions to external humidity has been examined, too. It has been found that the best technology for fabrication of alumina nano-films is plasmatic oxidation of aluminum evaporated thin films. It has been also found that the alumina nano-thin films are very sensitive to humidity.
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