Halogen free syntheses of aminosilanes by catalytic dehydrogenative coupling

US11780859B2 · kind B2 · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Antonio Sanchez · Tsukuba, JP
• Gennadiy Itov · Flemington, US
• Peng Zhang · Montvale, US
• Matthew Damien Stephens · Kingsport, US
• Manish Khandelwal · Danbury, US

Key dates

• Filing date: Feb 4, 2022
• Grant date: Oct 10, 2023
• Expiry date: Feb 4, 2042

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L21/02219
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds and method of preparation of Si—X and Ge—X compounds (X═N, P, As and Sb) via dehydrogenative coupling between the corresponding unsubstituted silanes and amines (including ammonia) or phosphines catalyzed by metallic catalysts is described. This new approach is based on the catalytic dehydrogenative coupling of a Si—H and a X—H moiety to form a Si—X containing compound and hydrogen gas (X═N, P, As and Sb). The process can be catalyzed by transition metal heterogenous catalysts such as Ru(0) on carbon, Pd(0) on MgO) as well as transition metal organometallic complexes that act as homogeneous catalysts. The —Si—X products produced by dehydrogenative coupling are inherently halogen free. Said compounds can be useful for the deposition of thin films by chemical vapor deposition or atomic layer deposition of Si-containing films.