Patent ID: 11972977
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A method of forming interconnects, comprising:
forming a plurality of mandrels on an interlayer dielectric (ILD) layer, wherein the ILD layer is made of a dielectric material having a Young's modulus equal to or greater than 1 GPa;
forming sidewall spacers on opposite sides of the each mandrel, wherein a portion of the ILD layer is exposed between adjacent sidewall spacers on adjacent mandrels;
removing the exposed portions of the ILD layer to form a first set of trenches between adjacent sidewall spacers, and ILD sections beneath the sidewall spacers;
forming a first set of interconnects in the first set of trenches, wherein the first set of interconnects include first conductive sections;
removing the mandrels to expose portions of the ILD layer between the sidewall spacers;
removing the exposed portions of the ILD layer to form a second set of trenches between the sidewall spacers, and ILD spacers between the second set of trenches and the first set of interconnects; and
forming a second set of interconnects in the second set of trenches, wherein the second set of interconnects include second conductive sections.