Degussa Aktiengesellschaft

Dmc, Inc

Guy Roche

Axel Niemann

Brigitte Delmon

Annette Gorse

Josselin Chaumonot

Enamel composition for dielectric layers, white pigments with improved wettability contained therein and plasma display panel containing the dielectric layer

The invention relates to a process for producing a conductive coating on glass and enamelled steel using a screen-printable aluminum paste. The paste to be used contains: 40 to 80 wt. %, in particular, 50 to 75 wt. % aluminum powder; 5 to 40 wt. %, in particular, 9 to 25 wt. % glass frit having an initial softening temperature of 400 to 700&deg; C., in particular, 420 to 580&deg; C.; 10 to 35 wt. % of a liquid or thermoplastic medium; and 0 to 10 wt. % sintering aid. The substrate coated with the paste is heated at 500 to 750&deg; C., in particular, 590 to 690&deg; C. The coating on the substrate is characterized by having a low specific resistance of less than 100 &mgr;ohm&middot;cm, in particular in the range of 10 to 70 &mgr;ohm&middot;cm, and good adhesion.

Process for producing a conductive coating on glass or on enamelled steel and substrates coated by this process

Formed bodies of glass, especially glass panes, are disclosed provided with electrically conductive circuits and with a colored appearance of the circuits upon looking through the glass and a method of their production. A layer of essentially pigments based on inorganic compounds is located between the optionally enamelled formed body of glass and the circuit which layer is connected via adhesive bridges of a vitrifying material to the formed body and to the circuits. The method of production is carried out by the application of a coating material which contains pigments and is free of vitrifying materials onto a formed body and (ii) the application of a conductive paste thereover containing a vitrifying material and (iii) a heat treatment.

Formed bodies consisting of glass and provided with electric circuits

Enamel-like coatings consisting of glass frits and pigments are used for auto glass panes. An improved opacity of these enamel layers relative to silver conducting tracks on these layers is achieved if 0.1 to 10% by weight silicon, boron, carbon, lead and/or silver in elemental form are added to the enamel.

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Isle, France

Guy Roche