Chemical vapor deposition apparatus with multi-zone injection block

A circular injector block having an axis of symmetry coincident with a diameter of the circular injector block, the circular injector block for supplying one or more reactant gases into a chemical vapor deposition reactor comprising:

• a first reactant gas flow path conduit in communication with one or more first reactant gas inlets;
• a second reactant gas flow path conduit in communication with one or more second reactant gas inlets;
• a plurality of first reactant gas distribution channels configured as linear channels in a portion of the circular injector block between the one or more first reactant gas inlets and a plurality of first reactant gas distribution outlets in direct fluid communication with the plurality of first reactant gas distribution channels such that each of the plurality of first reactant gas distribution outlets opens directly into the plurality of first reactant gas distribution channels to deliver a first reactant gas into the reactor, wherein the plurality of first reactant gas distribution channels is in fluid communication with the first reactant flow path conduit;
• wherein the one or more first reactant gas inlets are in fluid communication with the first reactant gas flow path conduit in proximity to a perimeter of the circular injector block, the first reactant gas flow path conduit separated into a first arcuate channel defining a first reactant gas first zone configured to supply a first set of first reactant gas distribution outlets, and a second arcuate channel defining a first reactant gas second zone configured to supply a second set of first reactant gas distribution outlets;
• and
• a plurality of second reactant gas distribution channels between the one or more second reactant gas inlets and a plurality of second reactant gas distribution outlets to deliver a second reactant gas into the reactor,
• wherein the plurality of second reactant gas distribution channels are in fluid communication with the second reactant gas flow path conduit;
• wherein the first reactant gas flow path conduit includes an annular channel positioned in proximity to the perimeter of the circular injector block, wherein the annular channel includes two or more dividers on a common side of the axis of symmetry and separating the first reactant gas flow path conduit into the first arcuate channel and the second arcuate channel, wherein the first arcuate channel has a first arcuate volume greater than a second arcuate volume of the second arcuate channel;
• and
• wherein, for a cross-sectional view of the circular injector block in a plane extending perpendicularly to the plurality of first reactant gas distribution channels, at least one second reactant gas distribution channel of the plurality of second reactant gas distribution channels and a corresponding second reactant gas distribution outlet of the at least one second reactant gas distribution channel are disposed to have a larger distance from a center of the circular injector block than the distance from the center of the circular injector block for each first reactant gas distribution outlet of the plurality of first reactant gas distribution outlets in the cross-sectional view;
• wherein the plurality of second reactant gas distribution outlets is partitioned into at least a second reactant gas first zone and a second reactant gas second zone, the second reactant gas second zone at least partially surrounding the second reactant gas first zone;
• wherein the first reactant gas flow path conduit and the second reactant gas flow path conduit are adjacent one another and a section of the first reactant gas flow path conduit and a section of the second reactant gas flow path conduit are both disposed radially outward from the at least one second reactant gas distribution outlet located in the second reactant gas second zone and from each of the first reactant gas distribution outlets;
• wherein the second reactant gas flow path conduit lies above the plurality of second reactant gas distribution channels, while the first reactant gas flow path conduit lies in a plane that intersects each of the first reactant gas distribution channels and each of the second reactant gas distribution channels.