Patent ID: 8937015
Filing Date: 2015-01-20
Classification: H01L

Abstract:
1. A method for forming a via in a substrate, comprising: (a) providing the substrate having a first surface and a second surface; (b) forming an accommodating groove and a plurality of pillars on the first surface of the substrate, the accommodating groove having a side wall and a bottom wall, the pillars remaining on the bottom wall of the accommodating groove, wherein the pillars are solid cylinders, and there is a completely empty space between the pillars; (c) forming a first insulating material in the accommodating groove and between the pillars; (d) removing all of the pillars completely so as to form a plurality of grooves in the first insulating material, wherein the grooves are spaced apart from each other; and (e) forming a first conductive metal in the grooves.