Patent ID: 9711454
Date: 2017-07-18
CPC Classifications: H01L

Claim:
1. A method for forming a semiconductor device, the method comprising: providing a substrate; forming a dielectric structure over the substrate, wherein the dielectric structure is formed to have a through via hole passing through the dielectric structure, the through via hole is formed to comprise a bottom and a sidewall adjacent to the bottom, and the sidewall of the through via hole comprises at least one indentation structure, and the at least one indentation structure has a substantially C-shaped cross-section, and the at least one indentation structure has a first surface, a second surface, and a tilted surface connecting the first surface and the second surface; forming a barrier layer conformally covering the sidewall and a bottom of the through via hole; forming a glue layer conformally covering the barrier layer, wherein the glue layer comprises a cobalt layer, and the glue layer is formed by using a metal organic chemical vapor deposition technique; forming a copper seed layer conformally covering the glue layer; and forming a copper layer covering the copper seed layer and filling the through via hole.