Low-Cost Solar-Array Project: Experimental Process System Development Unit for Producing Semiconductor-Grade Silicon Using the Silane-to-Silicon Process. Quarterly Progress Report, April-June 1981

摘要

This phase consists of the engineering design, fabrication, assembly, operation, economic analysis, and process support R and D for an Experimental Process System Development Unit (EPSDU). The mechanical bid package was issued and the bid package was issued and the bid responses are under evaluation. Similarly, the electrical bid package was issued, however, responses are not due until the third quarter. The majority of all equipment is on order or has been received at the EPSDU site. The pyrolysis/consolidation process design package was issued. Preparation of process and instrumentation diagram for the free-space reactor has been started. In the area of melting/consolidation, Kayex have successfully melted chunk silicon and have produced silicon shot. The free-space reactor powder was successfully transported pneumatically from a storage bin to the auger feeder twenty-five feet up and was melted. The fluid-bed PDU has successfully operated at silane feed concentrations up to 21%. The writing of the operating manual has started. Overall, the design phase is nearing completion. (ERA citation 06:033109)