Patent ID: 9679852
Date: 2017-06-13
CPC Classifications: H01L

Claim:
1. A construction, comprising: a conductive line extending lengthwise in a first direction and having an upper surface extending along the first direction; a plurality of conductive interconnects electrically coupled with the upper surface of the conductive line and spaced laterally from one another along the first direction by intervening regions over the conductive line; the conductive interconnects having first widths along the first direction in wide upper regions and having second widths along the first direction in narrow lower regions; first air gap/spacer insulative structures within the intervening regions between the narrow lower regions of the conductive interconnects, the first air gap/spacer insulative structures comprising first dielectric spacers along sidewalls of the conductive interconnects, and comprising first regions of air gaps between the first dielectric spacers; and second air gap/spacer insulative structures within the intervening regions between the wide upper regions of the conductive interconnects, the second air gap/spacer insulative structures comprising second dielectric spacers along sidewalls of the conductive interconnects, and comprising second regions the air gaps between the second dielectric spacers; within individual intervening regions, the second air gaps of the second air gap/spacer insulative structures merging with the first air gaps of the first air gap/spacer insulative structures with the second air gaps having a lateral width along the first direction that is greater than a lateral width of the first air gaps along the first direction.