Patent ID: 7285483
Filing Date: 2007-10-23
Classification: C23C,C30B

Abstract:
1. A susceptor configured to receive a semiconductor wafer on the surface thereof during the deposition of a layer on a front surface of the semiconductor wafer by chemical vapor deposition (CVD), the susceptor comprising a gas-permeable structure with a porosity of at least 15%, a density of from 0.5 to 1.5 g/cm 3 , a pore diameter of less than 0.1 mm and an internal surface area of the pores which is greater than 10,000 cm 2 /cm 3 , wherein the structure consists essentially of at least one of graphite fibers coated with silicon carbide or graphite particles coated with silicon carbide, and wherein the silicon carbide coating thickness decreases from the surface of the susceptor toward the interior of the susceptor.