Patent ID: 11923311
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An interconnect structure, comprising:
first conducting lines formed of a first metallic material and including at least one individual first conducting line in contact with a first corresponding substrate conducting line; and
second conducting lines formed of a second metallic material and including at least one individual second conducting line between neighboring first conducting lines and in contact with a second corresponding substrate conducting line;
the at least one individual second conducting line being separated from each of the neighboring first conducting lines by controlled distances,
wherein:
a pair of the first conducting lines comprise oppositely facing first conducting line sidewalls,
the interconnect structure further comprises dielectric material surrounding the first conducting lines such that tops of the first conducting lines are exposed through the dielectric material,
a section of the dielectric material between the pair of the first conducting lines being formed as spacer-shaped remainders abutting the oppositely facing first conducting line sidewalls,
the interconnect structure further comprises self-alignment caps disposed on tops of the first conducting lines and the spacer-shaped remainders, the self-alignment caps comprising a mushroom shape with a rounded upper surface that smoothly interfaces with the oppositely facing sidewalls of the spacer-shaped remainders, and
the self-alignment caps determining the controlled distances.