Patent ID: 8343281
Filing Date: 2013-01-01
Classification: C23C,F17D,Y10T

Abstract:
1. A source gas supply unit comprising: a canister in which a source is stored in liquid form; a heater which heats the canister to produce a source gas from the source stored in the canister; a source gas supply pipe to receive the source gas from the canister; a measuring unit installed on the source gas supply pipe and which directly measures the flow rate of the source gas through the source gas supply pipe; a temperature controller which controls the heater based on the amount of the source gas measured by the measuring unit such that the pressure in the canister is sufficient to force the source gas into the source gas supply pipe without injecting a carrier gas into the canister; and a source supply connected to the canister and configured to maintain a substantially constant amount of the source in the canister.