Power semiconductor contact structure and method for the production thereof
Abstract:
A power semiconductor contact structure for power semiconductor modules, which has at least one substrate 1 and a metal molded body 2 as an electrode, which are sintered one on top of the other by means of a substantially uninterrupted sintering layer 3a with regions of varying thickness. The metal molded body 2 takes the form here of a flexible contacting film 5 of such a thickness that this contacting film is sintered with its side 4 facing the sintering layer 3a onto the regions of varying thickness of the sintering layer substantially over the full surface area. A description is also given of a method for forming a power semiconductor contact structure in a power semiconductor module that has a substrate and a metal molded body. The forming of the power semiconductor contact structure is performed firstly by applying a layer of sintering material of locally varying thickness to either the metal molded body 2 or the substrate, followed by sintering together the contacting film 5 with the substrate 1 by using the properties of the layer of sintering material that are conducive to connection, the contacting film 5 being made to develop its distinct form to correspond to the varying thickness of the layer of sintering material 3a.
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