CONDUCTIVE PASTE, CONDUCTIVE FILM, METHOD FOR PRODUCING CONDUCTIVE FILM, CONDUCTIVE THIN WIRING LINE AND METHOD FOR PRODUCING CONDUCTIVE THIN WIRING LINE

摘要

[Problem] To provide a conductive paste which enables the achievement of a conductive film that has excellent laser etching properties and is useful for the formation of a thin wiring line.[Solution] After mixing and dispersing a silver powder having a central particle diameter D50 of from 0.5 μm to 5 μm (inclusive) and preferably having a tap density of 2.0 g/cm³ or more, a binder resin containing 60% by weight or more of a phenoxy resin having a number average molecular weight of 3,000 to 100,000 and an acid value of 20 eq./10⁶ to 500 eq./10⁶, a solvent and a dispersant that is preferably in a solid state at 25°C or higher, the resulting dispersion mixture is filtered, thereby obtaining a conductive paste which has a degree of dispersity of 10 μm or less as determined with a grind gage as specified by ISO 1524 (2013). According to the present invention, a thin wiring line is obtained by applying the thus-obtained conductive paste to a device material, on which an inorganic thin film has been formed, and subsequently drying and curing the conductive paste and then subjecting the resulting conductive paste to laser etching.