Patent ID: 6839505
Filing Date: 2005-01-04
Classification: C23C

Abstract:
1. A vapor delivery system for a solid precursor comprising: a vaporization chamber; a first surface within said vaporization chamber, said first surface arranged to hold a solid precursor material; a heating device having a temperature control, said temperature control arranged to vary the temperature of said heating device over a range of temperatures, at least a portion of the temperatures within said range of temperatures sufficient to transform said solid precursor material to a vapor, wherein said heating device is arranged to transfer heat to said first surface; a delivery line coupled to said vaporization chamber; a flow monitor arranged to measure the flow of said vapor through said delivery line; and a controller having a first input coupled to said flow monitor and a first output coupled to said temperature control of said heating device, said controller arranged to control the supply of said vapor to said delivery line by varying said first output to adjust the temperature of said heating device based at least in part on the measured flow of said vapor at said first input.