| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a brazing method for an insulation laminated material which prevents peeling of an insulation plate and a metal layer and is low in cost. <P>SOLUTION: The brazing method for the insulation laminated material is applied to brazing of an insulation circuit board 4 and a stress relaxing member 8 as the insulation laminated material in a base for a power module. The insulation circuit board 4 is constituted of the insulation plate 5, an aluminum wiring layer formed on one surface of the insulation plate 5, and an aluminum heat conductive layer 7 formed on the other surface of the insulation plate 5. The heat conductive layer 7 of the insulation circuit board 4 is formed of Al-Mg alloy and a flux flow preventing material that stops flow of molten flux by reacting with the molten flux is made to be present at the surrounding of the heat conductive layer 7. In this state, the heat conductive layer 7 of the insulation circuit board 4 and the stress relaxing member 8 are brazed in a furnace using the flux. The heat conductive layer 7 is formed of the Al-Mg alloy and the surface layer part of the circumferential surface 7a of the heat conductive layer 7 is made to react with the flux. <P>COPYRIGHT: (C)2012,JPO&INPIT |
