Jx Advanced Metals Corporation

Jx Metals Corporation

Toru Imori

Koichi Takemoto

Shiro Tsukamoto

Masahiro Takahata

Takahiro Uchida

Hideaki Fukuyo

Provided is a method for producing stannous oxide, comprising a step of subjecting stannous sulfate to neutralization in an aqueous solution using ammonium carbonate or ammonium bicarbonate, and thereby precipitating stannous oxide. This production method is a novel means for producing stannous oxide in which chlorine, sulfur, sodium, and potassium are sufficiently reduced, and which has excellent solubility.

Stannous oxide powder and method for producing same

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.

Copper electrode material

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.

Oxidation-resistant metallic tin

The purpose of the present invention is to provide a stannous oxide, which has excellent solubility and resistance to oxidation, from a stannous oxide powder comprising a stannous oxide and inevitable impurities, the stannous oxide powder having a stannous oxide content of 99.99 mass % or more in dry mass, a specific surface area of less than 0.5 m/g, a D50 particle size of 20 to 60 μm, and a half width of the particle size distribution of 5 to 30 μm.

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Tokyo, Japan

Toru Imori