Modular injector and exhaust assembly

1. An injector assembly for delivering gas to a substrate, comprising:

at least two injectors positioned adjacent each other and spaced apart to form at least one exhaust channel therebetween;

a mounting plate for securing the at least two injectors, wherein each of the at least two injectors being individually mountable to or removable from the mounting plate, and the mounting plate being provided with at least one exhaust slot in fluid communication with the at least one exhaust channel; and

an exhaust assembly coupled to said mounting plate for removing gases from said injectors;

wherein said at least two injectors includes:

one or more inner injector positioned adjacent each other and spaced apart to form a first exhaust channel therebetween; and

one or more end injector positioned adjacent and outside of the one or more inner injector and spaced apart to form a second exhaust channel therebetween; and

wherein said exhaust assembly includes:

an inner exhaust manifold assembly in fluid communication with said first exhaust channel; and

an outer exhaust manifold assembly in fluid communication with said second exhaust channel; and

wherein said inner exhaust manifold assembly includes:

a plate being provided with a plurality of through passages therein;

a plurality of tubes coupled to each of said plurality of the through passages; and

a balancing unit having a plurality of inlets for each of the tubes and a single outlet, wherein said balancing unit is further provided with plurality of channels connecting said plurality of inlets and the single outlet.

2. The injector assembly of claim 1 wherein said at least one exhaust slot extends along the substantial length of the mounting plate and is aligned with the at least one exhaust channel.

3. The injector assembly of claim 1 wherein the balancing unit comprises

a bottom plate provided with a plurality of concave channels extending inwardly to a center region of the bottom plate, and a plurality of inlets at each end of said plurality of the concave channels; and

a top plate provided with a plurality of concave channels extending inwardly to a center region of the top plate; wherein

said concave channels and center regions in the bottom and top plates are mirror image and constitute said plurality of channels connecting said plurality of inlets and said single outlet.

4. An injector assembly, comprising:

at least two injectors positioned adjacent each other and spaced apart to form at least one exhaust channel therebetween;

a mounting plate for securing the at least two injectors, wherein each of the at least two injectors being individually mountable to or removable from the mounting plate, and the mounting plate being provided with at least one exhaust slot in fluid communication with the at least one exhaust channel; and

an exhaust assembly coupled to said mounting plate for removing vases from said injectors, wherein said exhaust assembly comprises a balancing unit for providing uniform flow of exhaust gas;

wherein said at least two injectors includes:

one or more inner injector positioned adjacent each other and spaced apart to form a first exhaust channel therebetween;

one or more end injector positioned adjacent and outside of the one or more inner injector and spaced apart to form a second exhaust channel therebetween;

said exhaust assembly includes;

an inner exhaust manifold assembly in fluid communication with said first exhaust channel; and

an outer exhaust manifold assembly in fluid communication with said second exhaust channel; and

said inner exhaust manifold assembly includes a balancing unit provided with a plurality of channels in fluid communication with exhaust gas from the inner injectors.

5. The injector assembly of claim 4 , wherein the exhaust assembly comprises:

a lower exhaust plate coupled to said mounting plate, said lower exhaust plate is provided with at least one exhaust channel in fluid communication with said at least one exhaust slot in the mounting plate; and

an upper exhaust plate coupled to said lower exhaust plate, said upper exhaust plate is provided with at least one exhaust port in fluid communication with said at least one exhaust channel in the lower exhaust plate.

6. The injector assembly of claim 5 wherein

said at least one exhaust channel in the lower exhaust plate extends along the substantial length of the lower exhaust plate and is aligned with the at least one exhaust slot in the mounting plate.

7. The injector assembly of claim 6 wherein

said at least one exhaust channel in the lower exhaust plate is tapered along the height of the lower exhaust plate.

8. The injector assembly of claim 7 wherein

the at least one exhaust channel in the lower exhaust plate is wider at a top surface of the lower exhaust plate, and narrower at a bottom surface of the lower exhaust plate.

9. The injector assembly of claim 5 wherein

said at least one exhaust port is comprised of an elongated opening at a base end extending along the substantial length of the upper exhaust plate, said elongated opening being tapered inwardly and terminated in at least one port at a top surface of the upper exhaust plate.

10. The injector assembly of claim 9 wherein said elongated opening is terminated in a plurality of ports at a top surface of the upper exhaust plate.

11. The injector assembly of claim 9 wherein said elongated opening is terminated in two ports at a top surface of the upper exhaust plate.