Patent ID: 11901228
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method comprising:
forming a first conductive feature in a first inter-metal dielectric (IMD) layer, the first conductive feature comprising a capping layer;
selectively depositing a blocking film over and physically contacting the first conductive feature, a material of the blocking film comprising a hydrophilic group and a hydrophobic group;
depositing a first dielectric layer over and physically contacting the first IMD layer;
depositing a second dielectric layer over and physically contacting the first dielectric layer;
removing the blocking film;
depositing an etch stop layer over any physically contacting the first conductive feature and the second dielectric layer;
forming a second IMD layer over the etch stop layer;
etching an opening in the second IMD layer and the etch stop layer to expose the first conductive feature; and
forming a second conductive feature in the opening.