Invention Grant
- Patent Title: Top via process accounting for misalignment by increasing reliability
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Application No.: US16387628Application Date: 2019-04-18
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Publication No.: US10991619B2Publication Date: 2021-04-27
- Inventor: Chen Zhang , Lawrence A. Clevenger , Benjamin D. Briggs , Brent A. Anderson , Chih-Chao Yang
- 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: Tutunjian & Bitetto, P.C.
- Agent James Nock
- Main IPC: H01L21/768
- IPC: H01L21/768

Abstract:
A method for fabricating a semiconductor device to account for misalignment includes forming a top via on a first conductive line formed on a substrate, forming liners each using a first dielectric material, including forming first and second liners to a first height along sidewalls of the top via, forming dielectric layers, including forming first and second dielectric layers on the first conductive line to the first height and adjacent to the first and second liners, respectively, recessing the top via to a second height, and forming an additional dielectric layer on the recessed top via to the first height using a second dielectric material. The first and second dielectric materials are selected to compensate for potential misalignment between the first conductive line and the top via.
Public/Granted literature
- US20200335393A1 TOP VIA PROCESS ACCOUNTING FOR MISALIGNMENT BY INCREASING RELIABILITY Public/Granted day:2020-10-22
Information query
IPC分类: