Patent ID: 7629225
Filing Date: 2009-12-08
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising: forming a plurality of conductive lines over a workpiece; disposing a first insulating material over the workpiece, the first insulating material being disposed between the plurality of conductive lines; disposing a second insulating material over the first insulating material, the second insulating material being disposed between the plurality of conductive lines and comprising a sacrificial portion, wherein disposing the second insulating material comprises disposing a material that is impermeable; treating the second insulating material to remove the sacrificial portion of the second insulating material before removing at least a portion of the first insulating material, wherein treating the second insulating material to remove the sacrificial portion comprises forming pores or apertures in the second insulating material, causing the second insulating material to become permeable, and wherein treating the second insulating material comprises heating the second insulating material; and forming air gaps between the plurality of conductive lines by removing at least a portion of the first insulating material.