
3. Space News | In order to manufacture chips optimally, we need a comprehensive understanding of every process and phenomenon that takes place at the atomic level - in particular at the interface between solid and liquid materials.
Scientists from the Max Planck Institute for Metals Research in Stuttgart and the Israel Institute of Technology in Haifa have now been able to observe atomic processes at the interface between liquid aluminium and solid aluminium oxide (sapphire).
Using high voltage electron microscopy, they were able to show that crystals are able to order the atoms in neighbouring liquid metals, even at high temperatures. The results are important for procedures such as the wetting of joints in nanoscale "soldering" (Science, 28 October 2005)
When non-specialists think of sapphire, they imagine a shimmering blue semi-precious stone - used, for example, as the needle on a record player. For scientists, however, the sapphire is also a particular form of aluminium oxide (a-Al203, also: corundum). A very stabile aluminium oxide, sapphire is used in many fields of technology.
In semiconductor technology, for example, it insulates electronic components. In this and many other technological processes (e.g., solidification, crystal growing, and lubrication), the production process is being optimised and carried out at increasingly smaller dimensions. Therefore it is important to know what interactions take place at an atomic level, at the interface between solid and liquid materials.
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