Patent ID: 9738531
Date: 2017-08-22
CPC Classifications: C01B

Claim:
1. A process for producing polycrystalline silicon, comprising introducing a reaction gas comprising a silicon-containing component and hydrogen into a reactor comprising a base plate, an upper reactor section secured to the base plate, heating at least one support body by passage of direct current, and depositing polycrystalline silicon onto the support body such that at least one polycrystalline silicon rod is obtained, wherein, after the deposition has ended, a protective shell is installed laterally around the reactor during the deinstallation of the at least one polycrystalline silicon rod, connections on the upper reactor section are removed, the protective shell is placed laterally around the deposition reactor, and then the upper reactor section is removed in order finally to deinstall the at least one polycrystalline silicon rod, and wherein, after the deposition has ended, the reactor is opened for a period of time before and/or while connections are being removed from the upper reactor section and before the protective shell is installed.