Patent ID: 11862564
Assignee: DAI NIPPON PRINTING CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 20:
21. A method for manufacturing a multi-layer line structure, comprising:
coating an organic resin material above a substrate to form a first insulating layer;
forming a barrier metal layer on the first insulating layer;
forming a metal layer on the barrier metal layer;
forming a resist pattern on the metal layer, the resist pattern exposing a part of the metal layer;
forming first lines on an exposed part of the metal layer;
removing the resist pattern on the metal layer;
etching the metal layer except for the part overlapping the first lines by ion milling; and
after etching the metal layer, exposing a surface of each of the first lines to NH3 plasma,
wherein the width of each of the first lines is be equal to or less than 5 μm, and
the metal layer is formed of copper.