Ulvac, Inc.

Ulvac Techno, Ltd.

Shunji Misawa

Kazuya Uchida

Toshiharu Kurauchi

Muneto Hakomori

Sakae Inayoshi

Hiroshi Sato

The present invention provides a surface treatment method for an aluminum alloy and a surface treatment method for a magnesium alloy, which enable providing the surface of an aluminum alloy containing magnesium or the surface of a magnesium alloy with sufficient corrosion resistance to corrosive gases, while preventing the surface from scattering magnesium therefrom even when used in a vacuum at a temperature of not less than 300&#xb0; C. In this method, a carbon fluoride compound is applied over the surface of the aluminum alloy containing magnesium or the surface of the magnesium alloy, followed by heating in an oxygen atmosphere, thereby forming a fluoride passivation film.

Surface treatment method for aluminum alloy and surface treatment method for magnesium alloy

A plasma display panelof the present invention has a protective filmover a sustaining electrodeand a scanning electrodewith the main components of the protective film being CaO and SrO, and the concentration of the CaO in the protective filmis 20 mol % or more and 90 mol % or less. This protective filmhas a smaller work function than a conventional MgO film so light can be emitted at a lower discharge voltage than in the past. If the discharge voltage is lower, the protective filmwill be sputtered more slowly so that the service life of the plasma display panelwill be longer. Also, since the plasma-gas contains xenon gas, the plasma display panel of the present invention has higher brightness.

Protective film for plasma display panel and method for manufacturing this protective film, and plasma display panel and method for manufacturing thereof

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Tsuchiura, Japan

Shunji Misawa