Invention Grant
- Patent Title: Method of protecting low-K layers
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Application No.: US16436687Application Date: 2019-06-10
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Publication No.: US10734278B2Publication Date: 2020-08-04
- Inventor: Hirokazu Aizawa , Karthikeyan Pillai , Nicholas Joy , Kandabara Tapily
- Applicant: Tokyo Electron Limited
- Applicant Address: JP Tokyo
- Assignee: TOKYO ELECTRON LIMITED
- Current Assignee: TOKYO ELECTRON LIMITED
- Current Assignee Address: JP Tokyo
- Agency: Rothwell, Figg, Ernst & Manbeck, P.C.
- Main IPC: H01L21/768
- IPC: H01L21/768 ; H01L21/3213

Abstract:
A process is provided in which low-k layers are protected from etch damage by the use of a selectively formed protection layer which forms on the low-k layer. In one embodiment, the low-k layers may be low-k dielectric layers utilized in BEOL process steps. In one embodiment, the selectively formed protection layer may be formed by a selective deposition process which selectively forms layers on the low-k dielectric but not over the conductor layer. The selectively formed protection layer may then be utilized to protect the low-k layer from a plasma etch that is utilized to recess the conductor. In this manner, a conductor (for example metal) may be recessed in a low-k dielectric layer via a plasma etch process.
Public/Granted literature
- US20190385906A1 Method of Protecting Low-K Layers Public/Granted day:2019-12-19
Information query
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