Patent ID: 11948835
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A device comprising:
a non-insulator structure;
a dielectric structure over the non-insulator structure, the dielectric structure having a stepped sidewall structure, the stepped sidewall structure comprising a lower sidewall and an upper sidewall laterally set back from the lower sidewall;
a metal structure extending through the dielectric structure to the non-insulator structure, the metal structure having an upper metal portion confined by the upper sidewall of the dielectric structure, and a lower metal portion confined by the lower sidewall of the dielectric structure; and
an anti-adhesion material residue laterally between the lower metal portion of the metal structure and the dielectric structure, the upper metal portion laterally extending past opposite sides of the anti-adhesion material residue, wherein a bottommost position of the anti-adhesion material residue is higher than a bottommost position of the metal structure.