HIGH-PURITY ELECTROLYTIC COPPER

To provide a high-purity electrolytic copper containing Cu having purity of 99.9999 mass% or more excluding gas components, and 0.1 mass ppm or less of S, which can stably be produced when performing electrocrystallization by lowering electrodeposition stress and exhibit excellent handleability by s...

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Bibliographic Details
Main Authors TARUTANI YOSHIE, NAKAYA KIYOTAKA, ARAI ISAO, KUBOTA KENJI
Format Patent
LanguageEnglish
Japanese
Published 27.12.2018
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Summary:To provide a high-purity electrolytic copper containing Cu having purity of 99.9999 mass% or more excluding gas components, and 0.1 mass ppm or less of S, which can stably be produced when performing electrocrystallization by lowering electrodeposition stress and exhibit excellent handleability by suppressing the occurrence of warpage even after being separated from a cathode plate.SOLUTION: The purity of Cu excluding gas components (O, F, S, C and Cl) is 99.9999 mass% or higher containing 0.1 mass ppm or more of S and, the area ratio of a crystal having a plane orientation of (101) ±10° is less than 40% when measuring the crystal orientation on a cross section along the thickness direction by using electron backscattering diffraction.SELECTED DRAWING: None 【課題】ガス成分を除いたCuの純度が99.9999mass%以上とされるとともにSの含有量が0.1massppm以下とされ、電析時における電着応力を低減することにより、安定して製造可能であるとともに、カソード板から剥離された後でも反りの発生が抑制されて取り扱い性に優れた高純度電気銅を提供する。【解決手段】ガス成分(O,F,S,C,Cl)を除いたCuの純度が99.9999mass%以上とされ、Sの含有量が0.1massppm以下とされており、厚さ方向に沿った断面において電子後方散乱回折による結晶方位測定した結果、(101)±10°の面方位を有する結晶の面積率が40%未満とされていることを特徴とする。【選択図】なし
Bibliography:Application Number: JP20180097319