Patent ID: 7037448

Claim:
A method for producing a conductor paste comprising: preparing a conductive metal powder made of a noble metal or an alloy based on a noble metal; classifying said powder with a centrifugal separator such that the classified powder having an average particle size of 0.8 μm or less, and a ratio (D 50 /D min ) of a medium value D 50 of the particle size to a minimum value D min of detectable particle sizes of 1 to 5 can be obtained; and mixing said powder and an organic vehicle such that a conductor paste having a ration (V 1rpm /V 10rpm ) of a viscosity V 1rpm measured under conditions at 1 rpm with a spindle No. 4 with a Brookfield rotational viscometer and a viscosity V 1rpm measured under conditions at 10 rpm with a spindle No. 4 from 2 to 5, and containing the powder in a mass ratio of 80 mass % or more can be obtained.