PROCESS FOR THE PRODUCTION OF ULTRA HIGH PURITY POLYCRYSTALLINE SILICON
摘要
AN IMPROVED PROCESS AND APPARATUS FOR THE PRODUCTION OF ULTRA HIGH PURITY POLYCRYSTALLINE SILICON The present invention is directed to an improved process for producing ultra high purity polycrystalline silicon which process provides for increased production capacity and electrical power efficiency. The process comprises recycling the exhaust gases of the silane pyrolysis reactor after the gases have been preferably first cooled and filtered utilizing a pocket-type reaction zone enclosure having a particular effective radius thereby effectively decreasing the amount of silicon powder formation. Preferably, the rate of recycle flow is sufficient to entrain silicon powder in the reactor and remove the powder from the reactor with the exiting exhaust gases.
申请公布号
CA1310472(C)
申请公布日期
1992.11.24
申请号
CA19880569241
申请日期
1988.06.10
申请人
UNION CARBIDE CORPORATION
发明人
BRENEMAN, WILLIAM C.;FLAGELLA, ROBERT N.;GASTON, JON M.;HAGAN, DAVID W.