Patent ID: 8291935

Claim:
A gas manifold, comprising: M gas distribution ducts each including: a gas source port to receive a gas source; a gas flow path connected to the gas source port; 1 to N gas distribution ports connecting the gas flow path to 1 to N gas valves, respectively; and 1 to N valve outlets connecting the 1 to N gas valves to 1 to N valve outlet ports, wherein N and M are integers greater than three, and wherein at least one of said M gas distribution ducts includes N distribution ports, N valve outlets and N valve outlet ports; a mounting plate including an M×N array of gas inlet holes, wherein said M gas distribution ducts are connected to a first side of said mounting plate, and wherein each row of the array of gas inlet holes corresponds to one of said M gas distribution ducts; N gas mixing conduits connected to each including: 1 to M gas inlet holes connected to a second side of the mounting plate in locations corresponding to one column of valve outlets of said M gas distribution ducts; and a gas mixing region including a first portion connected to the 1 to M gas inlet holes and extending from a first end of said mounting plate to a second end of said mounting plate, a second portion connected to said first portion and extending from said second end to said first end, and a third portion connected to said second portion and extending from said first end to said second end; and a gas outlet hole connected to said third portion.