Oriented Columnar Structure of a Thin Intermetallic Film Cu6Sn5
Abstract
In this paper, the intermetallic film Cu6Sn5 is investigated, and a new type of highly oriented columnar nanocrystal structure is discovered. Processes of intermetallic compound synthesis in multilayered thin films of Cu-Sn localized in reaction islands with sizes up to 100 nm are examined. Scanning probe microscopy reveals the island structure of the film. A high-temperature phase of Cu6Sn5 with hexagonal lattice is condensed. X-ray structure analysis shows the predominance of single intermetallic phase of Cu6Sn5 while electron microscopy demonstrates high crystallographic orientation of intermetallic phase islands. However, the system of nanocrystals does not seem to be the classical polycrystalline system. The structure of the electronic reflexes suggests that islands of the inter-metallic thin film are deployed at different angles around a crystallographic axis [100]. It has a significant copper orienting effect on the growth of the intermetallic phase Cu6Sn5, orienting it toward [111].Downloads
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