Patent ID: 6706119
Filing Date: 2004-03-16
Classification: C23C,C30B,H01L

Abstract:
A reactor for growing a multi-layer Group III nitride semiconductor device in a single epitaxial growth run, the reactor comprising:a growth zone; means for heating said growth zone to a first temperature; a first gallium (Ga) source zone comprising: a first source tube; and a quartz boat, wherein a first Ga source within said quartz boat has a first Ga source exposed surface area of at least 1 square centimeter; means for heating at least a portion of said first Ga source within said first Ga source zone to a second temperature; a second Ga source zone comprising: a second source tube; and a quartz channel, wherein a second Ga source within said quartz channel has a second Ga source exposed surface area of less than 4 square millimeters; means for heating at least a portion of said second Ga source within said second Ga metal source zone to a third temperature; a halide gas source coupled to said first and second Ga source zones; a first inert gas source coupled to said first and second Ga source zones for transporting a first gallium chloride compound from said first Ga source zone to said growth zone and for transporting a second gallium chloride compound from said second Ga source zone to said growth zone; and a reaction gas source coupled to said growth zone for supplying a reactive gas to said growth zone, wherein a first reaction between said reactive gas and said first gallium chloride compound yields a first epitaxial growth rate and a second reaction between said reactive gas and said second gallium chloride compound yields a second epitaxial growth rate.