Invention Grant
- Patent Title: Three dimensional semiconductor device containing composite contact via structures and methods of making the same
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Application No.: US17166393Application Date: 2021-02-03
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Publication No.: US11515250B2Publication Date: 2022-11-29
- Inventor: Monica Titus , Ramy Nashed Bassely Said , Rahul Sharangpani , Senaka Kanakamedala , Raghuveer S. Makala
- Applicant: SANDISK TECHNOLOGIES LLC
- Applicant Address: US TX Addison
- Assignee: SANDISK TECHNOLOGIES LLC
- Current Assignee: SANDISK TECHNOLOGIES LLC
- Current Assignee Address: US TX Addison
- Agency: The Marbury Law Group PLLC
- Main IPC: H01L23/522
- IPC: H01L23/522 ; H01L23/528 ; H01L23/532 ; H01L21/768 ; H01L27/11582 ; H01L27/11556

Abstract:
A semiconductor structure includes at least one first semiconductor device located on a substrate, lower-level dielectric material layers embedding lower-level metal interconnect structures, at least one second semiconductor device and a dielectric material portion that overlie the lower-level dielectric material layers, at least one upper-level dielectric material layer, and an interconnection via structure vertically extending from the at least one upper-level dielectric material layer to a conductive structure that can be a node of the at least one first semiconductor device or one of lower-level metal interconnect structures. The interconnection via structure includes a transition metal layer and a fluorine-doped filler material portion in contact with the transition metal layer, composed primarily of a filler material selected from a silicide of the transition metal element or aluminum oxide, and including fluorine atoms.
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