Invention Grant
- Patent Title: Differentiated molecular domains for selective hardmask fabrication and structures resulting therefrom
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Application No.: US16347507Application Date: 2016-12-23
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Publication No.: US10886175B2Publication Date: 2021-01-05
- Inventor: Eungnak Han , Rami Hourani , Florian Gstrein , Gurpreet Singh , Scott B. Clendenning , Kevin L. Lin , Manish Chandhok
- Applicant: Intel Corporation
- Applicant Address: US CA Santa Clara
- Assignee: Intel Corporation
- Current Assignee: Intel Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: Schwabe, Williamson & Wyatt, P.C.
- International Application: PCT/US2016/068582 WO 20161223
- International Announcement: WO2018/118089 WO 20180628
- Main IPC: H01L29/06
- IPC: H01L29/06 ; H01L21/768 ; H01L21/033 ; H01L21/311 ; H01L23/522

Abstract:
Selective hardmask-based approaches for conductive via fabrication are described. In an example, an integrated circuit structure includes a plurality of conductive lines in an inter-layer dielectric (ILD) layer above a substrate. The plurality of conductive lines includes alternating non-recessed conductive lines and recessed conductive lines. The non-recessed conductive lines are substantially co-planar with the ILD layer, and the recessed conductive lines are recessed relative to an uppermost surface of the ILD layer. A dielectric capping layer is in recess regions above the recessed conductive lines. A hardmask layer is over the non-recessed conductive lines but not over the dielectric capping layer of the recessed conductive lines. The hardmask layer differs in composition from the dielectric capping layer. A conductive via is in an opening in the dielectric capping layer and on one of the recessed conductive lines. A portion of the conductive via is on a portion of the hardmask layer.
Public/Granted literature
- US20200058548A1 DIFFERENTIATED MOLECULAR DOMAINS FOR SELECTIVE HARDMASK FABRICATION AND STRUCTURES RESULTING THEREFROM Public/Granted day:2020-02-20
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