Patent ID: 9666451
Date: 2017-05-30
CPC Classifications: H01L

Claim:
1. An interconnect structure for an integrated circuit, the interconnect structure comprising: a first layer of the interconnect structure disposed above a substrate, the first layer comprising a grating of alternating metal lines and dielectric lines in a first direction; and a second layer of the interconnect structure disposed above the first layer, the second layer comprising a grating of alternating metal lines and dielectric lines in a second direction, perpendicular to the first direction, wherein each metal line of the grating of the second layer is disposed on a recessed dielectric line comprising alternating distinct regions of a first dielectric material and a second dielectric material corresponding to the alternating metal lines and dielectric lines of the first layer of the interconnect structure, and wherein each dielectric line of the grating of the second layer comprises a continuous region of a third dielectric material distinct from the alternating distinct regions of the first dielectric material and the second dielectric material.