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METHOD FOR REMOVING BORON FROM SILICON

外国特許コード F140007819
整理番号 120202-PCT
掲載日 2014年1月21日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2013JP052867
国際公開番号 WO 2013121970
国際出願日 平成25年2月7日(2013.2.7)
国際公開日 平成25年8月22日(2013.8.22)
優先権データ
  • 特願2012-031993 (2012.2.16) JP
発明の名称 (英語) METHOD FOR REMOVING BORON FROM SILICON
発明の概要(英語) Provided is a method for removing boron from silicon, which is capable of efficiently removing boron from a starting material of silicon that is used for solar cells, thereby keeping the concentration of boron contained in the starting material low. This method for removing boron from silicon comprises: a first process wherein a first member that is composed of silicon containing boron and a second member that is composed of a low-melting-point metal are put in a crucible (101) and the first and second members are heated and melted within the crucible (101), thereby forming a desired alloy (102b); a second process wherein a slag (103a) is introduced into the crucible (101) after the first process so as to have the surface layer part of the alloy (102b) covered with the slag (103b), and the slag (103b) and the alloy (102b) are heated and reacted with each other, thereby transferring boron from the alloy (102b) to the slag (103b); and a third process wherein the slag (103c) is removed from the crucible (101) after the second process, thereby leaving only the alloy (102c) in the crucible (101).
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • THE FOUNDATION FOR THE PROMOTION OF INDUSTRIAL SCIENCE
  • 発明者(英語)
  • MORITA KAZUKI
  • YOSHIKAWA TAKESHI
  • MA XIAODONG
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IS KE KG KM KN KP KR KZ LA LC LK LR LS LT LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

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