Patent ID: 8048756
Filing Date: 2011-11-01
Classification: H01L

Abstract:
1. A method for forming microelectronic structures, comprising: forming an aperture in a borophosphosilicate glass microelectronic substrate material, the aperture extending into the substrate material from a plane of the substrate material; disposing an underlayer in the aperture, the underlayer including tantalum; disposing a platinum layer in the aperture adjacent to the underlayer, the platinum layer including a first platinum portion in the aperture and a second platinum portion external to the aperture; disposing a phosphosilicate glass fill material on the substrate material, the phosphosilicate glass having a first glass portion in the aperture adjacent to the platinum layer and a second glass portion external to the aperture; recessing the second glass portion inwardly toward the plane of the substrate material relative to the second platinum portion with the recessed second glass portion still projecting beyond the plane of the substrate material; and forming a microelectronic feature in the aperture.