Patent ID: 9472530
Filing Date: 2016-10-18
CPC Classification: H01L

Claim Text:
1. A method for carrying out a conductive direct metal bonding between two substrates of semi-conductive materials, comprising the steps of: a) Providing a first substrate a surface of which is covered by a first metal layer, and a second substrate a surface of which is covered by a second metal layer, b) Bringing into direct contact the first metal layer and the second metal layer so as to form a bonding interface comprising metal material bridges between the first metal layer and the second metal layer, the metal material bridges being separated by cavities which are fluidly connected to each other, d) Immersing the bonding interface in an oxidizing fluid so as to oxidize, at least in part, portions of the first metal layer and portions of the second metal layer which delimit the cavities, this oxidation generating a metal oxide which fills, at least in part, the cavities, the metal oxide forming contact areas between the portions of the first metal layer and the second metal layer which delimit the cavities.