Patent ID: 7208392
Filing Date: 2007-04-24
Classification: H01L

Abstract:
1. A method of creating an electrically conducting bonding between a face of a first semiconductor element and a face of a SiC film included in a second semiconductor element by heat treatment, comprising: depositing at least one layer directly on the face of the first semiconductor element, each material chosen for each layer being either a semiconductor material or tungsten; depositing at least one layer directly on the face of the SiC film, each material chosen for each layer being either a semiconductor material or tungsten, wherein at least one of the layers deposited on the first semiconductor element and on the SiC film is of tungsten; applying the faces one against the other, with interposing of the deposited layers; and carrying out a heat treatment at a temperature of or greater than 650° C. for combining the deposited layers to form one layer that provides an electrically conducting bonding between the two faces, no insulator layer being interposed between the two faces such that the SiC film is not electrically insulated from the first semiconductor element; wherein the at least one layer deposited onto the face of the first semiconductor element and the at least one layer deposited onto the face of the SiC film are chosen to react in a solid phase during the heat treatment and to form a temperature stable mixture with respect to the first and the second semiconductor elements, the heat treatment not inducing any reaction product between the deposited materials and the SiC film.