H - Electricity – 05 – K
Patent
H - Electricity
05
K
H05K 1/09 (2006.01) H01B 1/16 (2006.01) H05B 3/84 (2006.01)
Patent
CA 2405991
The invention concerns a method for making electroconductive strips on a transparent substrate, by screen-printing an electroconductive paste, and the transparent substrate provided with said strips. The invention is characterised in that it consists in: forming strip conductors having a length not more than 0.3 mm by applying by screen-printing a thixotropic electroconductive paste having a viscosity ratio without shearing stress to the viscosity with shearing stress in screen-printing conditions of at least 50 and having a silver content higher than 35 % and whereof at least 98 % of the particles forming it have a size less than 25 mu m, using a screen having at least 90 yarns per cm, the coating of said screen being provided with slots whereof the smallest size is equal to 0.25 mm < 0.05 mm, and by subjecting said strips to a curing process.
La présente invention se rapporte à un procédé de fabrication de pistes électroconductrices sur un substrat transparent, par sérigraphie d'une pâte électronconductrice, et au substrat transparent pourvu desdites pistes. Selon l'invention, on forme des pistes conductrices de largeur inférieure ou égale à 0,3 mm en appliquant par sérigraphie une pâte électroconductrice thixotrope possédant un rapport de la viscosité sans contrainte de cisaillement à la viscosité sous contrainte de cisaillement dans les conditions de la sérigraphie d'au moins 50 et ayant une teneur en argent supérieure à 35 % et dont au moins 98 % des particules qui la constituent ont une taille inférieure à 25 µm, au moyen d'un tamis ayant au moins 90 fils par cm, le revêtement dudit tamis étant pourvu de fentes dont la largeur la plus étroite est égale à 0,25 mm ~ 0,05 mm, et en soumettant lesdites pistes à une cuisson.
Beyrle Andre
Hahn Dieter
Kummutat Rainer
Lebail Yannick
Switalla Josef
Goudreau Gage Dubuc
Saint-Gobain Glass France
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