Packaging Structure and Method

摘要

A method of making a semiconductor device includes providing a substrate and forming a conductive layer on the substrate. The conductive layer includes a first metal. A semiconductor die is provided. A bump is formed on the semiconductor die. The bump includes a second metal. The semiconductor die is positioned proximate to the substrate to contact the bump to the conductive layer and form a bonding interface. The bump and the conductive layer are metallurgically reacted at a melting point of the first metal to dissolve a portion of the second metal from an end of the bump. The bonding interface is heated to the melting point of the first metal for a time sufficient to melt a portion of the first metal from the conductive layer. A width of the conductive layer is no greater than a width of the bump.