Patent ID: 8366830
Filing Date: 2013-02-05
Classification: C23C,C30B

Abstract:
1. An apparatus for holding semiconductor wafers in an inverted-type semiconductor growth reactor chamber for growth of semiconductor materials on the wafers, comprising: a tower comprising an upper end and a lower end opposite said upper end, said upper end comprising a plurality of mounting points enabling said tower to be mounted to the top inside surface of a reactor chamber at a plurality of selectable mounting positions, the height of said tower adjustable according to the selected mounting point and relative to a gas inlet of said reactor; a cup mounted to the lower end of said tower and comprising a plurality of cup holes; a susceptor arranged at said tower's lower end in said cup, wherein said selectable mounting points allow said susceptor to be movable with said tower relative to said gas inlet, said susceptor comprising a first portion made of a material having lower thermal conductivity at high temperature and low thermal expansion, said material also capable of reflecting radiative heat, and a second portion having high thermal conductivity at high temperature, the semiconductor wafers on a retaining lip of said cup aligned with said cup holes and held adjacent to said second portion with heat from said susceptor passing to the wafers primarily through said second portion, wherein said first portion comprises a spacer element arranged within said cup, said spacer element located between said first portion and said cup, said first portion contacting said cup along said spacer element, wherein said first portion comprises one or more plate holes, and wherein said second portion fits within one of said one or more plate holes.