Patent ID: 6464930
Filing Date: 2002-10-15
Classification: C23C,C30B

Abstract:
A semiconductor manufacturing apparatus comprising:a furnace chamber having an open bottom; a heater operatively associated with said furnace chamber so as to heat the inside thereof; a wafer boat; an elevating plate on which said wafer boat is supported, said elevating plate being disposed under the open bottom of said furnace chamber, and said elevating plate being movable up and down vertically relative to said furnace chamber between positions at which said wafer boat is located inside the furnace chamber and beneath the furnace chamber, respectively; and a heater block interposed between said wafer boat and said elevating plate, said heater block comprising a sealed case atop which said wafer boat is mounted, at least one horizontally extending heat-reflecting plate disposed in said case, whereby the at least one heat-reflecting plate reflects heat upwardly into the furnace chamber as the elevating plate is lowered to thereby prevent thermal loss at the open bottom of the furnace chamber, and a plurality of pins fixing said at least one heat-reflecting plate in place so as to be immovable relative to said case and thereby preventing the at least one heat-reflecting plate form vibrating during operation of the apparatus.