Nippon Sheet Glass Company, Limited

Shunji Wada

Masahiro Ikadai

Yukihiro Kato

A cover glass () includes a glass layer (), a viscoelastic layer (), and an acoustic impedance adjusting layer () disposed between the glass layer () and the viscoelastic layer (). When acoustic impedance of the glass layer () is Zg, acoustic impedance of the acoustic impedance adjusting layer () is Zm, and acoustic impedance of the viscoelastic layer () is Zd, the cover glass () satisfies a relationship of Zg&#x3e;Zm&#x3e;Zd.

Cover glass and display using same

A substrate with a transparent condcutive film is provided, which has a high work function and an excellent surface smoothness as well as a reduced specific resistance to thereby ensure a reduced power consumption and enhanced display quality. An ITO film is formed on a glass substrate by an ion plating method by using an ITO sintered compact with an SnO content of 4 to 6 wt %. The ITO film obtained as above has a surface having a work function of 4.9 to 5.5 eV, a surface roughness of 1 to 10 nm, and a specific resistance of 1.6&times;10 &OHgr;&middot;cm or less. An organic EL device using the substrate is provided, in which an organic multilayer film (hole transport layer , light-emitting layer , and electron transport layer ) is laminated on the surface of the ITO film , and further a metal thin film layer is laminated on the surface of the organic multilayer film.

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Kanagawa, Japan

Shunji Wada