Patent ID: 9711447
Date: 2017-07-18
CPC Classifications: H01L

Claim:
1. A method comprising: forming a hardmask layer on a dielectric layer; forming a first feature on the hardmask layer; forming a first mandrel that extends in a first direction across the first feature; removing the first mandrel and the hardmask layer beneath the first mandrel to pattern the hardmask layer with the first feature masking a first section of the hardmask layer; after the hardmask layer is patterned, etching the dielectric layer to form a first trench and a second trench separated by a section of the dielectric layer masked by the first section of the hardmask layer; and filling the first trench and the second trench with a conductor layer to respectively form a first wire and a second wire separated from the first wire by the section of the dielectric layer.