Sumitomo Metal Mining Company, Ltd.

Yasuyuki Maeno

Yoshiyuki Abe

Riichiro Wake

Masakazu Kuwahara

An oxide evaporation material in the present invention comprises a sintered body containing indium oxide as a main component thereof and cerium with the Ce/In atomic ratio of more than 0.110 and equal to or less than 0.538, and has an L* value of 62 to 95 in the CIE 1976 color space. The oxide evaporation material with the L* value of 62 to 95 has an optimal oxygen amount. Accordingly, even when a small amount of oxygen gas is introduced into a film-formation vacuum chamber, a high-refractive-index transparent film having a refractive index of 2.15 to 2.51 at a wavelength of 550 nm, a low resistance, and a high transmittance in the visible to near-infrared region is formed by vacuum deposition methods. Since the introduced oxygen gas amount is small, the difference in composition between the film and the evaporation material is made small.

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Tokyo, Japan

Yasuyuki Maeno