Patent ID: 6464782
Filing Date: 2002-10-15
Classification: C23C,Y10S,Y10T

Abstract:
Apparatus for the processing of thin films on semiconductor substrates using two or more liquid precursor sources wherein, at a common temperature, a first of said two or more liquid precursor sources has a higher vapor pressure than a second of said two or more liquid precursor sources, which comprises:(a) a processing chamber; (b) a manifold connected to said processing chamber; (c) apparatus for vaporizing said first of said liquid precursor sources, having said higher vapor pressure, including apparatus for introducing the resulting vapor into said manifold at a first point spaced away from said processing chamber; and (d) apparatus for vaporizing said second of said liquid precursor sources, having a vapor pressure lower than said first of said liquid precursor sources, including apparatus for introducing the resulting vapor into said manifold at a second point spaced closer to said processing chamber than said first point of introduction of said vaporized first liquid precursor source; whereby, each subsequent downstream liquid precursor source has a lower vapor pressure than all preceding liquid precursor sources.