A circuit system has a semiconductor device mounted on a substrate which includes a composite metal material comprising a plurality of discrete elements of ferrous metal material such as an alloy of 36 percent nickel and the balance iron having a relatively low coefficient of thermal expansion, the discrete...http://www.google.fr/patents/US4894293?utm_source=gb-gplus-shareBrevet US4894293 - Circuit system, a composite metal material for use therein, and a method for making the material
Circuit system, a composite metal material for use therein, and a method for ...
