Patent ID: 6383298
Filing Date: 2002-05-07
Classification: C23C,F27D,Y10S,Y10T

Abstract:
Apparatus for measuring pressure within a susceptor volume, within a CVI/CVD furnace having a furnace shell, during a CVI/CVD process wherein a reactant gas is introduced into the CVI/CVD furnace via a reactant gas line which passes through the furnace shell, and wherein the susceptor volume is bounded by susceptor sides, a susceptor lid, and a floor plate, comprising:a pressure indicator tube having two ends, a first end and a second end, wherein said first end is in said susceptor volume, and wherein a portion of said pressure indicator tube is located inside the portion of said reactant gas line which passes through the furnace shell; and a pressure indicator located outside of said CVI/CVD furnace, wherein said second end of said pressure indicator tube is connected to said pressure indicator in fluid communication therewith.