Journal ArticleDOI
Ageing studies of discontinuous copper and silver thin films
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The results of experiments carried out on the post-deposition resistance changes in discontinuous films of copper and silver with and without overlayers of SiO and Al2O3 are presented in this paper.Abstract:
The results of experiments carried out on the post-deposition resistance changes in discontinuous films of copper and silver with and without overlayers of SiO and Al2O3 are presented. The changes in the sheet resistance of the films with time and pressure were studied for the above combinations. Mobility coalescence is assumed to be responsible for the resistance increase of an uncovered copper film of initial resistance 1.9 MΩ/□. On exposure to the atmosphere, it was found that an Ag/SiO combination of initial resistance of 0.1 MΩ/□ achieved stability in the sheet resistance much quicker than a Cu/Al2O3 combination of initial resistance 20 MΩ/□. The fall in resistance of the Cu/Al2O3 composite is attributed to the formation of Al2(OH)6 due to the interaction of Al2O3 with the water vapour in atmosphere. Copper films with and without overlayers of Al2O3 show an abrupt increase in the sheet resistance as a function of pressure at a pressure of about 5 × 10−2 torr with the maximum rate of change of resistance occurring at higher pressure for the higher resistance film. This indicates that the overlayer of Al2O3 is very porous in nature. Field effect studies were carried out on an uncovered copper film of initial resistance 10 MΩ/□ and the behaviour was found to be ohmic up to a field of 800 V cm−1.read more
Citations
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The effect of magnetic field on the ageing of island silver films for successive depositions
TL;DR: In this paper, the effect of magnetic field on the occurrence of large scale coalescence (LSC) is studied through repeated deposition technique, and the results show that the effect is more pronounced on smaller islands than on larger ones.
Journal ArticleDOI
Studies on the stability of Cu island films deposited on a softenable substrate
TL;DR: In this article, the authors reported the results of the investigations carried out on the stability of discontinuous Cu films deposited on polymethylmethacrylate coated substrate heated to a temperature above the glass transition temperature of the polymer.
Journal ArticleDOI
Effect of overlayers on the instability of copper island films
TL;DR: In this article, the effect of overlayers of Al2O3, SiO2 and MoO3 on the instability of discontinuous copper films at room temperature and at 125 K, are reported.
Journal ArticleDOI
Time variation of the tunnelling length in island Cu films studied by the repeated deposition technique
TL;DR: In this article, a new agglomeration rate was defined in terms of the change in the tunnelling length per unit time which enables easier comparison between films, and applied to the Cu island films studied by the repeated deposition technique.
Journal ArticleDOI
Ageing and field effect studies on discontinuous silver films at near liquid nitrogen temperatures
TL;DR: In this paper, the post deposition resistance changes in discontinuous silver films deposited in a vacuum of 2 × 10−6 torr on glass substrates maintained at near liquid nitrogen temperatures have been studied.
References
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Journal ArticleDOI
Electrical Conduction Mechanism in Ultrathin, Evaporated Metal Films
C. A. Neugebauer,M. B. Webb +1 more
TL;DR: In this paper, the authors investigated the electrical conduction mechanism in the film plane of ultrathin, evaporated metal films and showed that the conductivity depends exponentially on reciprocal temperature, and it should be independent of field at low fields.
Journal ArticleDOI
Electrical Resistance‐Strain Characteristics of Thin Evaporated Metal Films
R. L. Parker,A. Krinsky +1 more
Abstract: The electrical resistance‐strain coefficients of thin evaporated films of aluminum, gold, cobalt, nickel, palladium, platinum, antimony, and tellurium have been measured. The coefficients (strain‐sensitivity coefficient or ``gauge‐factor'' γ) depend on the specific resistance Rs of the films. For relatively thick films (small Rs), γ tends to approach the bulk value γb; for relatively thin films (large Rs), γ may be many times greater than γb; for films of intermediate thickness γ has a minimum value. The resistance change was found to be proportional to strain for all the above films except those of Ni and Sb. Some possible mechanisms for the observed behavior are discussed; it is suggested that free‐path effects are predominant in films of intermediate thickness, and that the tunneling conduction mechanism plays an important role in producing the high strain sensitivity of very thin (high Rs) films of separated particles.
Journal ArticleDOI
Morphological Changes in Discontinuous Gold Films following Deposition
J. G. Skofronick,W. B. Phillips +1 more
TL;DR: In this paper, the authors observed that discontinuous gold films exhibit temperature-dependent morphological changes following deposition and observed that the initial deposited nuclei are nearly circular and have a doubled peaked size distribution.
Journal ArticleDOI
A Mechanism to Account for Observed Morphological Changes in Discontinuous Gold Films following Deposition
TL;DR: In this paper, experimental results on the behavior of discontinuous metal films on amorphous substrates of carbon and silicon monoxide are extended and reviewed in terms of possible mechanisms to account for the experimental behavior.
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