Copper interconnects for computer

Continued improvements in lithography have resulted in line widths that are less than one micron, thus classifying computer chips as an example of nanotechnology. The use of copper interconnects on silicon chips for use in personal computers is the first and most widespread use of copper in nanotechnology. It is this technology that has made it possible for personal computers to achieve speeds in the gigahertz range.IBM's development of the Double Damascene Process, whereby a tantalum diffusion barrier was laid down under the copper, enables copper to enter this application. In this process, copper is applied to the substrate by a vacuum deposition process

Source: copper.orgAdded: 5 April 2007