CONDUCTIVE INK FOR OFFSET PRINTING, AND CIRCUIT PATTERN FORMING METHOD USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a conductive ink which is suitable to an offset printing used for forming an electrode and a circuitry, preferably used for a low-temperature calcination, performed in particular at a temperature below 600°C, and concurrently satisfying a low specific resistance after forming patterns, superior line configuration of the pattern, and superior printing or transcription performance.

SOLUTION: The above subject can be solved, by using the conductive ink; that is, specific surface is 0.5 to 5 m2/g, an average particle diameter D50 is 0.1 to 2μm, a tap density is 3 to 6 g/cm3, a silver powder with 20 to 50 nm crystal diameter and an organic compound are contained as an essential component, and a 0.1 to 10 mass% glass frit is contained with a softening point at a range of 350 to 500°C. The ratio toη5 (η1/η5) is 2 to 6 between the viscosity at 25°C, when the cutting speed is 2s-1, and the viscosityη1 at 25°C, when the cutting speed is 10s-1.

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