Study of Methods for Anisotropic Plasma-Chemical Etching of Low-k Layers with Protection of the Porous Structure of the Material

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Аннотация

The article summarizes the results of studying the processes of cryogenic plasma etching of low-k dielectrics for use in integrated circuit metallization systems with a node less than 10 nm. The mechanisms of film degradation during plasma etching are considered, and an approach based on the adsorption of condensed plasma-forming gas in pores is studied. Experimental results are presented concerning the development and application of methods for controlling the filling of film pores in situ. The results of studying the parameters of the plasma of bromine-containing gases (CF3Br and C2F4Br2) and the nature of the degradation of the chemical composition of films after etching are presented. For comparison, the same characteristics are given for the previously used CF4 plasma.

Авторлар туралы

Andrey Miakonkikh

Valiev Institute of Physics and Technology, RAS

Хат алмасуға жауапты Автор.
Email: miakonkikh@ftian.ru
Ресей, 34 Nakhimovsky Ave., Moscow, 117218, Russia

Rafael Gaidukasov

Valiev Institute of Physics and Technology, RAS

Email: gaydukasov.r@gmail.com
Ресей, 34 Nakhimovsky Ave., Moscow, 117218, Russia

Vitaly Kuzmenko

Valiev Institute of Physics and Technology, RAS

Email: kuzmenko@ftian.ru
Ресей, 34 Nakhimovsky Ave., Moscow, 117218, Russia

Әдебиет тізімі

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© Miakonkikh A.V., Gaidukasov R.A., Kuzmenko V.O., 2023

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