The substrate including a pattern, constitutes an alloy of gold, of a noble metal and of a metal base, the pattern being isolated by the oxides of the noble metals and of base

摘要

In a substrate, cable, a conductive pattern is the form of an alloy of gold, of a metal base and of a noble metal and is adjacent to an insulating layer of a mixture of oxides of metals and noble. The alloy comprises, then the noble metals and in a total proportion of 0,2 a 2 by weight. Then, the metal is titanium, aluminum or copper. The precious metal is of the palladium, ruthenium, rhodium or nickel. The substrate cable is manufactured by forming a first layer of the metal base, a second layer of noble metal and a layer of gold selectively formed successively on the substrate and by treating a hot at least the first layer, the second layer and the layer of gold to convert the layer of gold and the parts of the first and second layers on which the layer of gold is formed, in a conductive pattern and to convert concurrently with other parts of the first and second layers of insulating layer. The first layer, the second layer, and the layer of gold is then of the respective thicknesses of 0,025 has 0,4, 0,025 has 0,3 and 1 to 10 microns. When the noble metals of the base and are respectively the titanium and palladium, the heat treatment is carried out at the air has 850c 950c for 5 to 10 minutes.