Patent ID: 8772939
Filing Date: 2014-07-08
Classification: H01L

Abstract:
1. A microelectronic substrate, comprising: a substrate material having an aperture extending into the substrate material from a substrate material plane; a conductive material on the substrate material, the conductive material having a first conductive portion in the aperture and a second conductive portion external of the aperture, wherein the conductive material has a first hardness; and a fill material having a first fill portion in the aperture and proximate to the first conductive portion and a second fill portion external of the aperture and on the second conductive portion, the fill material including a material selected from the group consisting of titanium, titanium nitride, and titanium oxide, wherein the fill material has a second hardness greater than the first hardness, and wherein the first fill portion extends partially into the aperture to form a tapered end spaced apart from the first conductive portion in the aperture.