Flowable film dielectric gap fill process

US8809161B2 · kind B2 · utility

Assignee

• Novellus Systems, Inc. · US

Inventors

• Vishal Gauri · San Jose, US
• Raashina Humayun · Los Altos, US
• Chi-I Lang · Cupertino, US
• Judy H. Huang · Los Gatos, US
• Michael Barnes · San Ramon, US
• Sunil Shanker · Santa Clara, US

Key dates

• Filing date: Jul 3, 2013
• Grant date: Aug 19, 2014
• Expiry date: Jul 3, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L21/02274
• WIPO field: Semiconductors
• WIPO sector: Electrical engineering

Abstract

Methods of this invention relate to filling gaps on substrates with a solid dielectric material by forming a flowable film in the gap. The flowable film provides consistent, void-free gap fill. The film is then converted to a solid dielectric material. In this manner gaps on the substrate are filled with a solid dielectric material. According to various embodiments, the methods involve reacting a dielectric precursor with an oxidant to form the dielectric material. In certain embodiments, the dielectric precursor condenses and subsequently reacts with the oxidant to form dielectric material. In certain embodiments, vapor phase reactants react to form a condensed flowable film.