ELECTROCONDUCTIVE PASTE AND LIGHT TRANSMISSIVE ELECTROCONDUCTIVE FILM

摘要

PURPOSE:To provide a sufficient electroconductivity and light-beam transmissivity by using an electroconductive paste which contains needle-shaped indium-tin oxide fine powder having a short diameter/long diameter ratio as exceeding a specific value in a resin and a solvent for it in a certain specific weight ratio range. CONSTITUTION:In a resin and a solution for it which have been used as a photo-transmissive electroconductive film, needle-shaped indium-tin oxide(ITO) fine powder is included, whose long diameter is over 5mum and long-to-short diametric ratio is between 5 and 10. and thus an electroconductive paste is formed. The resultant electroconductive film should consist of ITO fine powder and resin, have a specific resistance of film under 1.0OMEGA.cm, and the ITO fine powder content by volume of the film being below 25 capacity %. The weight ratio of the ITO fine powder in the paste to the resin should preferably range between 60:40 thru 80:20. More resin content heightens the film resistance, and less resin sinks the film strength while heightens the resistance.