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公开(公告)号：US20210331934A1
公开(公告)日：2021-10-28
申请号：US16494021
申请日：2019-04-11
发明人： Koichi Takemoto
IPC分类号： C01G19/02
摘要： Provided is a stannous oxide powder that can be suitably used for supplying tin ions, and has improved solubility and at the same time has an improved handling property. A stannous oxide powder comprising stannous oxide and inevitable impurities, wherein a content of stannous oxide in a dry mass is 99.9% by mass or more; a specific surface area is from 0.1 to 1.0 m2/g; a TAP density is from 2 to 4 g/cm; a 50% particle diameter is from 30 to 60 μm; and an angle of repose is from 10 to 33°.
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公开(公告)号：US11118276B2
公开(公告)日：2021-09-14
申请号：US15775731
申请日：2017-03-02
发明人： Toru Imori , Koichi Takemoto
摘要： Provided is high purity tin having purity of 5N (99.999% by mass), which can suppress generation of particles. According to the high purity tin, the number of particles each having a particle diameter of 0.5 μm or more is 50,000 or less per a gram.
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公开(公告)号：US12129529B2
公开(公告)日：2024-10-29
申请号：US17287205
申请日：2020-02-27
发明人： Takahiro Uchida , Toru Imori , Koichi Takemoto , Shiro Tsukamoto
CPC分类号： C22C13/00 , B65D81/2007
摘要： In the present invention, a high-purity metallic tin suitable for use in an EUV exposure device is provided through use of an oxidation-resistant metallic tin, the oxidation-resistant metallic tin containing 99.995 mass % or more of tin, and unavoidable impurities, and the thickness of an oxide film being 2.0 nm or less when the surface of a cut face of the oxidation-resistant metallic tin is measured by AES.
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公开(公告)号：US11772981B2
公开(公告)日：2023-10-03
申请号：US16494021
申请日：2019-04-11
发明人： Koichi Takemoto
IPC分类号： C01G19/02
CPC分类号： C01G19/02 , C01P2004/61 , C01P2006/11 , C01P2006/12 , C01P2006/80
摘要： Provided is a stannous oxide powder that can be suitably used for supplying tin ions, and has improved solubility and at the same time has an improved handling property. A stannous oxide powder comprising stannous oxide and inevitable impurities, wherein a content of stannous oxide in a dry mass is 99.9% by mass or more; a specific surface area is from 0.1 to 1.0 m2/g; a TAP density is from 2 to 4 g/cm; a 50% particle diameter is from 30 to 60 μm; and an angle of repose is from 10 to 33°.
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公开(公告)号：US12043914B2
公开(公告)日：2024-07-23
申请号：US17629696
申请日：2020-05-01
发明人： Koichi Takemoto
IPC分类号： C25D3/32 , C07C303/32 , C07C309/04 , C25D3/30 , C25D21/14
CPC分类号： C25D3/32 , C07C303/32 , C07C309/04 , C25D3/30 , C25D21/14
摘要： The present invention provides a method for producing an aqueous tin methanesulfonate solution by dissolving tin (II) oxide in an aqueous methanesulfonic acid solution, wherein if A is the number of moles of the tin (II) oxide and B is the number of moles of the methanesulfonic acid, the value of B/2A is within the range of from 1.0 to 1.4. This method for dissolving tin (II) oxide into an aqueous methanesulfonic acid solution is able to achieve a high tin ion concentration.
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公开(公告)号：US10781024B2
公开(公告)日：2020-09-22
申请号：US16078139
申请日：2017-02-17
发明人： Toru Imori , Koichi Takemoto , Hideaki Fukuyo , Shiro Tsukamoto , Takahiro Uchida , Masatomi Murakami
摘要： Provided is a high-purity tin product that does not contain undesirable carbonaceous impurities as a result of the following: a vacuum-packed high-purity metal article (vacuum-packed high-purity tin article) is obtained by vacuum packaging a high-purity metal (high-purity tin), at least a portion of a surface of a high-purity metal being covered with a fluorocarbon resin sheet; and the vacuum-packed high-purity metal article(vacuum-packed high-purity tin article) is obtained by vacuum packaging, with a vacuum packaging film, the high-purity metal in which at least a portion of a surface is covered with the fluorocarbon resin sheet.
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