Invention Grant
- Patent Title: Methods of producing fully self-aligned vias and contacts
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Application No.: US16015714Application Date: 2018-06-22
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Publication No.: US10553485B2Publication Date: 2020-02-04
- Inventor: Ying Zhang , Regina Freed , Nitin K. Ingle , Ho-yung Hwang , Uday Mitra , Abhijit Basu Mallick , Sanjay Natarajan
- 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 ; H01L21/67 ; H01L21/3213

Abstract:
Methods and apparatus to form fully self-aligned vias are described. First conductive lines are recessed in a first insulating layer on a substrate. A first metal film is formed in the recessed first conductive lines and pillars are formed from the first metal film. Some of the pillars are selectively removed and a second insulating layer is deposited around the remaining pillar. The remaining pillars are removed to form vias in the second insulating layer. A third insulating layer is deposited in the vias and an overburden is formed on the second insulating layer. Portions of the overburden are selectively etched from the second insulating layer to expose the second insulating layer and the filled vias and leaving portions of the third insulating layer on the second insulating layer. The third insulating layer is etched from the filled vias to form a via opening to the first conductive line.
Public/Granted literature
- US20180374750A1 Methods Of Producing Fully Self-Aligned Vias And Contacts Public/Granted day:2018-12-27
Information query
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