Patent ID: 9012783
Filing Date: 2015-04-21
Classification: B23K,C22C,H01L

Abstract:
1. A heat dissipation base comprising: a supporting substrate containing ceramic material; a plurality of circuit members containing copper and formed on a first main surface of the supporting substrate; and a heat dissipation member formed on a second main surface of the supporting substrate, the second main surface being opposite to the first main surface, wherein the plurality of the circuit members are arranged on the first main surface of the supporting substrate, and each of the plurality of circuit members and the heat dissipation member is joined to the supporting substrate through a joining layer composed of a brazing material, wherein the brazing material comprises silver and copper as main components; at least one element A selected from indium, zinc and tin; at least one element B selected from titanium, zirconium, hafnium and niobium; and at least one element C selected from molybdenum, osmium, rhenium and tungsten, wherein a content of copper is not less than 35% by mass and not more than 50% by mass, based on the total amount of silver, copper, and the elements A, B and C, and wherein a content of carbon is 0.05% by mass or less.