Patent ID: 9082770
Filing Date: 2015-07-14
Classification: H01L

Abstract:
1. A damascene gap structure, comprising: a first etch stop layer (ESL); an oxide region above the first ESL; a low-k (LK) dielectric region above the oxide region; a second ESL above the LK dielectric region; a first ESL seal region above the second ESL; a second ESL seal region flush with the second ESL and below the first ESL seal region; a gap between the first ESL and the second ESL seal region; a first metal line on a first side of the gap, the first metal line formed under at least one of the second ESL or the second ESL seal region, the first metal line formed through the first ESL; and a second metal line on a second side of the gap, the second metal line formed under at least one of the second ESL or the second ESL seal region, the second metal line formed through the first ESL.