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US 12,132,289 B2Granted
Copper electrode material
AssigneeJX Advanced Metals Corporation
InventorsMasahiro Takahata, Hideaki Fukuyo, Toru Imori, Koichi Takemoto
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Abstract
A copper electrode material comprising Cu and unavoidable impurities, wherein the content of the unavoidable impurities is 1 ppm by mass or less and the average crystal grain diameter is 100 μm or less. A copper-containing electrode material having improved corrosion resistance is provided by the copper electrode material.
Claims5
A copper electrode material, the copper electrode material comprising Cu which has a purity of 99.9999% by mass or more, excluding gas components, wherein an average crystal grain diameter of Cu is 20 μm or less,
- wherein the copper electrode has a S content of 0.1 parts per million (ppm) by mass or less,
- wherein the copper electrode material has a number of pores having a pore diameter of 10 μm or more of less than 1 pore/cm2 as observed by an optical microscope.
Dependencies are inferred from the claim text.