Thin metal films are widely used in design of energy-saving facilities and spectral selective filters working in the optical and IR-range. Selection of metals, thickness of films and deposition conditions, which define the nanodimensional structure of the covering, form the desired optical properties. Unfortunately, the traditional technology does not allow to achieve the level of reflection demanded by industry.

The methods of formation of nanostructures in thin-film were developed and the influence of nano-topology and nano-structure on thin-film properties were investigated. On a surface of a polymeric substrate from PMMA the relief is formed by means of ionic etching on depth ~10 - 100 nm through metal masks. This relief has a form of set of cone-similar roughness' with the characteristic cross sizes ~10 nm. Thus, the density of metal masks does not exceed percolation threshold. Further a layer of metal (Au, Ag, Pt or Cu) was deposited by magnetron sputtering or electron beam deposition. This metal layer is necessary for creation of the optical filter operating at a level of conductivity. Over a layer of metal a diamond-similar adhesive layer by thickness ~2 - 5 nm was obtained by plasma-polymerization of methane. This layer takes part in formation of optical properties. The thick-film protective polymeric layer was formed by pulverization of acrylic varnish. This protective layer is not connected with the lower layers structurally, but it forms chemical connections with an adhesive layer. The topology of structure was studied by means of AFM. It is shown that the effective conductivity of structure appreciably increases with the use of above described adhesive layer. At the same time, this organic film, which is included in structure of the composite covering, are not conducting. The physical model explaining this effect from the point of view of formation of one-two - dimensional nanopores with cross-section size ~1 - 10 nm is suggested. The spectral characteristics of composite coverings are investigated depending on parameters of topology, structure and technology. Such an approach allows us to lower the reflection up to values below critical from the point of view of practical applications, using traditional technologies and components only.

Key words: nanostructural composites, thin films, nanopores, transparent conductive coating