Patent ID: 6098964
Filing Date: 2000-08-08
Classification: C23C

Abstract:
A method for producing vapor in a vaporizer having a determined maximum acceptable carrier gas pressure time rate of change for the pressure of the carrier gas provided to the vaporizer, the method comprising the steps of:(a) flowing a carrier gas through a flow control device and thereafter to a first inlet of a vaporizer;(b) flowing a processing liquid to a second inlet of said vaporizer whereby the vaporizer outputs a vaporized mixture of said carrier gas and said processing liquid to an outlet of said vaporizer; and, thereafter,(c) measuring periodically the pressure of said carrier gas provided to said vaporizer;(d) determining a carrier gas pressure time rate of change by comparing a measured carrier gas pressure to a previously measured carrier gas pressure;(e) comparing said measured carrier gas pressure time rate of change to the maximum acceptable carrier gas pressure time rate of change; and(f) generating a detectable indication when said measured carrier gas pressure time rate of change exceeds said maximum acceptable carrier gas pressure time rate of change.