Patent ID: 8058791

Claim:
An electronic circuit board manufacturing apparatus for forming dot patterns between electrodes on a substrate, said electronic circuit board manufacturing apparatus comprising: a discharge head of a piezo-jet type using a piezoelectric element, said discharge head having discharge opening and jetting a solution that includes metal micro-particle material for forming the conductive thin film, and said discharge head jetting the solution on the electrodes and on the area between the electrodes at a speed between 6 m/s and 18 m/s and in a range from a few picoliters to a few tens of picoliters and vaporizing a volatile component in a solution dot pattern after the droplet is jetted on the substrate so that a solid content remaining on the substrate as its thickness is in a range from a few â„« to 1 Î¼m, wherein the solution having metal micro-particle dispersed in liquid satisfies a relationship of 0.0002â‰¦Dp/Doâ‰¦0.01, where Dp denotes a diameter of the metal micro-particle and Do denotes a diameter of the discharge opening.