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Proceedings Paper

Metal reduction at bulk chemical filtration
Author(s): Toru Umeda; Shusaku Daikoku; Shuichi Tsuzuki; Tetsuya Murakami
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Paper Abstract

OK73 thinner and cyclohexanone, both of which were spiked with metals were passed through Nylon 6,6 filter, varying flow rate, which include the conditions of both point-of-use and bulk filtrations. The influent and effluent metal concentrations were measured using ICP-MS for metal removal efficiency of the filtration. As a result, removal efficiency for some metals descended depending on the flow rate, while others maintained. Slower flow rate is recommended to maintain low metal concentration in bulk filtration based on the result. Metals in cyclohexanone were reduced at higher efficiency than in OK73 thinner, agrees with a metal removal model of hydrophilic adsorbent in organic solvent, evidenced in our previous paper. Further, metal reduction on 300 mm φ Si wafer after coating organic solvents with Nylon 6,6 filtration was evidenced with TREX analysis.

Paper Details

Date Published: 27 March 2017
PDF: 8 pages
Proc. SPIE 10146, Advances in Patterning Materials and Processes XXXIV, 1014629 (27 March 2017); doi: 10.1117/12.2257937
Show Author Affiliations
Toru Umeda, Nihon Pall Ltd. (Japan)
Shusaku Daikoku, Nihon Pall Ltd. (Japan)
Shuichi Tsuzuki, Nihon Pall Ltd. (Japan)
Tetsuya Murakami, Nihon Pall Ltd. (Japan)

Published in SPIE Proceedings Vol. 10146:
Advances in Patterning Materials and Processes XXXIV
Christoph K. Hohle, Editor(s)

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