Patent ID: 9695510
Date: 2017-07-04
CPC Classifications: C23C,H01J

Claim:
1. An atomic layer deposition apparatus, comprising: a chamber having outer and inner surfaces, wherein at least a portion of the inner surfaces define an internal volume of the chamber; a fixture assembly positioned in the internal volume of the chamber and having a surface configured to hold a substrate within the internal volume of the chamber; a plurality of gas injection ports configured to facilitate the introduction of gas into the apparatus; at least one precursor gas arrangement in fluid communication with at least one of the plurality of gas injection ports and configured to introduce precursor gas into the internal volume of the chamber; at least one inactive gas dispersion arrangement in fluid communication with at least one of the plurality of gas injection ports and configured to introduce inactive gas into the internal volume of the chamber, wherein the inactive gas dispersion arrangement comprises a charge volume and a primary dispersion member, the primary dispersion member having a nominal thickness (L) and a plurality of holes extending through the primary dispersion member nominal thickness (L), such that at least a portion of the inactive gas introduced to the internal volume of the chamber through the plurality of holes substantially concentrically focuses the precursor gas towards the surface configured to hold the substrate; and a control arrangement configured to: such that an effective thickness (Leff) of the primary dispersion member is greater than a diffusion length (L