Mitsubishi Materials Corporation

Takumi Odaira

Kazunari Maki

Yuki Ito

Kenichiro Kawasaki

This pure copper material includes Cu in an amount of 99.9 mass % or more and 99.999 mass % or less, an average crystal grain size in a rolled surface is 10 μm or more, and when a measurement area of 1 mmor more is measured by an EBSD method at a measurement interval of 1 μm, measurement points at which a CI value obtained by an analysis using data analysis software OIM is 0.1 or less are excluded, and boundaries between adjacent pixels with a misorientation of 5° or more are regarded as crystal grain boundaries, an average of local orientation spread (LOS) is 2.00° or less.

Pure copper material, insulating substrate, and electronic device

This pure copper material includes Cu in an amount of 99.96 mass % or more, either one or both of one or more A-group elements selected from Ca, Ba, Sr, Zr, Hf, Y, Sc, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, and one or more B-group elements selected from O, S, Se, and Te are included in a total amount of 10 mass ppm or more and 300 mass ppm or less, an average crystal grain size in a rolled surface is 15 μm or more, and a high-temperature Vickers hardness at 850° C. is 4.0 HV or more and 10.0 HV or less.

Growing community of inventors

Kitamoto, Japan

Takumi Odaira