Patent ID: 7192486

Claim:
An apparatus for providing to a semiconductor processing chamber a first processing gas and a second processing gas reactive with the first processing gas, the apparatus comprising: a mixing structure in fluid communication with the processing chamber; a first gas delivery line in fluid communication with the mixing structure; a first carrier gas source in fluid communication with the first gas delivery line through a first mass flow controller and upstream of the mixing structure; a first liquid source; a first pressurizing gas source in fluid communication with the first liquid source to vaporize the first liquid, the first gas delivery line in fluid communication with a first vaporization stage for combining the vaporized first liquid with a flow of the first carrier gas; and a second gas delivery line separate from the first gas delivery line and in fluid communication with the mixing structure; a second carrier gas source separate from the first carrier gas source, in fluid communication with the second gas delivery line through a second mass flow controller separate from the first mass flow controller, and upstream of the mixing structure; a second liquid source; and a second pressurizing gas source in fluid communication with the second liquid source to vaporize the second liquid, the second gas delivery line in fluid communication with a second vaporization stage for combining the vaporized second liquid with a flow of the second carrier gas, wherein the apparatus has a component configured to exhibit a conductance velocity of at least 0.3 CV.