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

Claim 11:
12. A method of forming self-aligned multi-metallic interconnects according to the interconnect structure of claim 1, the method comprising:
forming the first conducting lines in the dielectric material such that the tops of the first conducting lines are exposed through the dielectric material by formation of the section of the dielectric material between the pair of the first conducting lines into the spacer-shaped remainders of the dielectric material that abut the oppositely facing sidewalls of the pair of the first conducting lines and by a controlling of widths between the oppositely facing sidewalls of the spacer-shaped remainders to effectively control positionings and widths of the second conducting lines to be later formed;
selectively forming the self-alignment caps on the tops of the first conducting lines exposed through the dielectric material and on tops of the spacer-shaped remainders of the dielectric material; and
forming the second conducting lines between the first conducting lines and the spacer-shaped remainders of the dielectric material with the self-alignment caps providing self-alignment of the second conducting lines and with the widths between the self-alignment caps determining the positionings and the widths of the second conducting lines.