Invention Grant
- Patent Title: Junctionless back end of the line via contact
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Application No.: US15292789Application Date: 2016-10-13
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Publication No.: US10446490B2Publication Date: 2019-10-15
- Inventor: Effendi Leobandung
- Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Applicant Address: US NY Armonk
- Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Current Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Current Assignee Address: US NY Armonk
- Agency: Cantor Colburn LLP
- Agent JoAnn Crockatt
- Main IPC: H01L23/48
- IPC: H01L23/48 ; H01L23/52 ; H01L29/40 ; H01L23/528 ; H01L21/3213 ; H01L23/522 ; H01L23/532 ; H01L21/768

Abstract:
A method of forming an interconnect structure includes providing a first dielectric layer, patterning a wire opening in a first dielectric layer, lining the wire opening with a metal liner and includes filling the wire opening with a first conductive material. The method also includes depositing a first cap on the first dielectric layer, depositing a second dielectric layer, and patterning a via trench in the second dielectric layer. The method also includes depositing a metal liner, removing the metal liner from a via junction, and enlarging the contact area. The method also includes filling the via trench with a second conductive material to form a via.
Public/Granted literature
- US20170194256A1 JUNCTIONLESS BACK END OF THE LINE VIA CONTACT Public/Granted day:2017-07-06
Information query
IPC分类: