Reactive atmospheric processing crystal growth apparatus

Claim 1

Crystal growth apparatus comprising: an ampoule having a vertically elongated wall defining a chamber for receiving a crystal growth source material wherein said chamber converges at its lower end to form a seeding cavity at its bottom characterized by a conical first section and a capillary second lower section; said wall being integrally joined at the bottom end to a heat sink having an inlet and an outlet means adapted for receiving a coolant and being integrally joined at the upper end to a passageway for introducing gases and a passageway for removing gases from said chamber; said passageway for removing gases including first and second series connected traps of a diameter larger than the portions of said passageway leading to, from and interconnecting same, whereby liquid and solid condensates are precluded from re-entering said chamber; and insulation means surrounding said wall intermediate said ends adapted for controlling heat losses occasioned by convection and radiation upon the removal of said crucible from within a furnace during a crystal growth operation.