Gas injection for de-agglomeration in particle coating reactor

US11692265B2 · kind B2 · utility

Assignee

• Applied Materials, Inc. · US

Inventors

• Jonathan Frankel · Los Gatos, US
• Quoc Truong · San Ramon, US
• Sekar Krishnasamy · Kanchinakote, IN
• Govindraj Desai · Kanchinakote, IN
• Sandip S. Desai · Kanchinakote, IN

Key dates

• Filing date: Mar 17, 2022
• Grant date: Jul 4, 2023
• Expiry date: Mar 17, 2042

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K9/5089
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A method of coating particles includes dispensing particles into a vacuum chamber to form a particle bed in at least a lower portion of the chamber that forms a half-cylinder, evacuating the chamber through a vacuum port in an upper portion of the chamber, rotating a paddle assembly such that a plurality of paddles orbit a drive shaft to stir the particles in the particle bed, injecting a reactant or precursor gas through a plurality of channels into the lower portion of the chamber as the paddle assembly rotates to coat the particles, and injecting the reactant or precursor gas or a purge gas through the plurality of channels at a sufficiently high velocity such that the reactant or precursor a purge gas de-agglomerates particles in the particle bed.