| 摘要 |
PURPOSE:To radiate heat effectively from lead electrode by configurating electrode with a composite material where carbon fiber is buried in the copper matrix and by making the diameter larger than the semiconductor element. CONSTITUTION:A semiconductor element 1, heat radiating electrode plate 2 consisting of copper and composite material electrode 3 are bonded by a material 4, and an hermetically sealing insulator 6 is filled in a plate 2. The electode 3 is superior in thermal conductivity and therefore heat generated in the element 1 is quickly radiated. At this time, the heat radiated from the plate 2 flows as indicated by the broken line. It is therefore important to make the shape of electrode 3, particularly electrode diameter and electrode thickness equal or larger than those enclosed in the broken line. Heat generated by semiconductor element can be radiated more effectively than in the lead electrode side. |
