Invention Grant
- Patent Title: Fully self-aligned via
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Application No.: US17019909Application Date: 2020-09-14
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Publication No.: US11437274B2Publication Date: 2022-09-06
- Inventor: Regina Freed , Madhur Sachan , Susmit Singha Roy , Gabriela Alva , Ho-yung David Hwang , Uday Mitra , El Mehdi Bazizi , Angada Bangalore Sachid , He Ren , Sushant Mittal
- Applicant: Micromaterials LLC
- Applicant Address: US DE Wilmington
- Assignee: Micromaterials LLC
- Current Assignee: Micromaterials LLC
- Current Assignee Address: US DE Wilmington
- Agency: Servilla Whitney LLC
- Main IPC: H01L21/768
- IPC: H01L21/768 ; H01L23/522 ; H01L23/532 ; H01L21/311

Abstract:
Apparatuses and methods to provide a fully self-aligned via are described. A first metallization layer comprises a set of first conductive lines extending along a first direction on a first insulating layer on a substrate, the set of first conductive lines recessed below a top portion of the first insulating layer. A capping layer is on the first insulating layer, and a second insulating layer is on the capping layer. A second metallization layer comprises a set of second conductive lines on the second insulating layer and on a third insulating layer above the first metallization layer. The set of second conductive lines extend along a second direction that crosses the first direction at an angle. At least one via is between the first metallization layer and the second metallization layer. The via is self-aligned along the second direction to one of the first conductive lines. The tapering angle of the via opening may be in a range of from about 60° to about 120°.
Public/Granted literature
- US20210090952A1 Fully Self-Aligned Via Public/Granted day:2021-03-25
Information query
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