Patent ID: 8766257
Filing Date: 2014-07-01
Classification: G03F,H01L

Abstract:
1. A structure comprising, from bottom to top: a first line level structure including a first array of first metal pads, wherein a first lateral extension portion protrudes from each of said first metal pads; a first via level structure including first metal vias, wherein each of said first metal vias contacts one of said first lateral extension portions and has vertical sidewalls; a second line level structure including a second array of second metal pads, wherein a second lateral extension portion protrudes from each of said second metal pads, each of said lateral extension portion contacts one of said first metal vias, and a second metal pad among said second array of said second metal pads which vertically overlies a first metal pad among said first array of said first metal pads is electrically isolated from said first metal pad and is electrically connected to another first metal pad that does not directly underlie said second metal pad; and a second via level structure including second metal vias and located above said second line level structure, wherein each of said second metal vias contacts an upper surface of one of said second metal pads and does not contact any of said second lateral extension portions.