I D
× COMMENTARYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
Solar desalination Researchers at Rice University (Houston, Tex.; www.rice.edu) working…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILESOLIDS PROCESSINGEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More

Comment Processing & Handling

New polysilicon granule-drying system boosts processing yields and purity

By Scott Jenkins |

A novel cold-dry process makes possible the utilization of fine form-factor silicon, such as granules and sand-like fines, in the production of high-purity polysilicon for solar photovoltaic cells and semiconductors, where such fine-grained material would normally have to be sent back up the supply chain rather than into the crucible. The patent-pending drying system, known as FlashDry, was developed by MEI LLC (Albany, Ore.; www.meillc.com) and is a critical component of a new wet-processing suite for ultrapure polysilicon. The effectiveness of the drying scheme means polysilicon makers can chemically etch, rinse and dry granular silicon, which increases yields while maintaining ultrahigh purity. “Tiny particles of silicon were thought to be impossible to dry fully in large quantities,” explains David Gibbel, development engineering manager at MEI. “FlashDry opens the door to etching fine and granular polysilicon, as well as reclaimed scrap silicon material, since it can effectively and rapidly dry the etched and rinsed polysilicon.” When melting silicon in the production of high-purity material for use in photovoltaic cells and semiconductors, manufacturers try to add granular silicon to Czochralski crucibles…
Related Content
Beyond Simple Mixing
Five different examples are presented in which specialty mixers are used to perform tasks more efficiently than conventional approaches Specialty…
Liquid Mixing in Stirred Tanks
A method of quantifying mixing according to a mixing index is presented. This index can evaluate and predict mixing intensity…
Chementator Briefs
Solar desalination Researchers at Rice University (Houston, Tex.; www.rice.edu) working on nanophotonics-enabled solar membrane distillation (NESMD) have found that concentrating…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
Quadruple Sensor Lifetime with a Retractable Housing
Minimizing Explosion Risk Where Other Solutions Cannot
Minimizing Corrosion with Fast, Robust Gas Analysis
Lower Measurement Point Costs with Automatic pH Sensor Cleaning
Reduce the Risk of Corrosion in Fertilizer Production

View More

Live chat by BoldChat