Patent ID: 7611586

Claim:
A reactor for growing a gallium containing single crystal, comprising: a reactor tube; a multi-zone heater; a growth zone in the reactor tube, wherein the multi-zone heater maintains a substrate within the growth zone at a growth temperature; an extended gallium source at least partially inside and partially outside of the reactor tube and within a multi-zone gallium source zone, wherein different portions of the extended gallium source are maintained at different temperatures, a position of the extended gallium source being controllable so that the multi-zone heater maintains a first portion of the extended gallium source at a first temperature while simultaneously maintaining a second, larger portion of the extended gallium source at a second temperature that is less than the first temperature; a halide reaction gas source coupled to the multi-zone gallium source zone; an inert gas source coupled to the multi-zone gallium source zone to transport a first reaction product from the multi-zone gallium source zone to the growth zone; and a reaction gas source coupled to the growth zone.