Patent ID: 8486191

Claim:
A reactor for processing substrates, comprising: a substantially rectangular, horizontal flow reaction chamber comprising a first side and an opposite second side; a substrate support configured for supporting a substrate with a major surface exposed, the substrate support positioned inside the reaction chamber between the first side and the second side of the reaction chamber; a first set of adjustable gas injectors configured to inject a first gas from a first reactant source into a mixing space and control a gas flow profile of the first gas into the mixing space; a second set of adjustable gas injectors configured to inject a second gas from a second reactant source into the mixing space and control a gas flow profile of the second gas into the mixing space, wherein the first set of adjustable gas injectors includes no common gas injectors with the second set of adjustable gas injectors, and wherein the first and second sets of adjustable gas injectors are disposed on a common wall extending along a portion of the mixing space and are positioned on the first side of the reaction chamber; wherein the reactor is configured so that the first and second gases first mix together at the mixing space to form a gas mixture and form a substantially unidirectional common flow path of the gas mixture from the mixing space to the substrate support, the common flow path having no flow restrictions between the mixing space and the substrate support; and an outlet configured to allow flow from the reaction chamber, wherein the outlet is positioned on the second side of the reaction chamber.