Sumitomo Electric Industries, Limited

Katsuko Harano

Naoji Fujimori

Nobuhiro Ota

Yoshiyuki Yamamoto

Keiichiro Tanabe

Takashi Tsuno

A window material, which has a high thermal conductivity material layer having a thermal conductivity of at least 10 W/cm.multidot.K and which has a cooling medium flow path on or in the high thermal conductivity material layer, has a high heat-dissipating property and a high transmittance.

Window and preparation thereof

A substrate, which has a high thermal conductivity material layer having a thermal conductivity of at least 10 W/cm.multidot.K and which has a cooling medium flow path on or in the high thermal conductivity material layer, has a high heat-dissipating property.

Substrate, semiconductor device, element-mounted device and preparation

Diamond is subjected to working such as smoothing or cutting by irradiation of light having a wavelength in the range of 190 nm to 360 nm to the surface of the diamond. The energy density of the incident light, the divergent angle of the light beam and the half-width of spectrum of the light are specified. The light beam is converged by a cylindrical lens. Moreover, the working is conducted in a specified material, whereby the flatness of the worked face and the working speed are improved.

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Itami, Japan

Katsuko Harano