| 摘要 |
PURPOSE: To obtain a conductive flake powder useful to a conductive paste for cold cure in the flake powder having conductivity by specifying the ratio of the major axis to thickness, average diameter and tap density of the powder particles. CONSTITUTION: In the conductive flake powder of Ag, etc., the ratio of the major axis (1) to thickness (t) of the powder particle is limited to conform to 1/t>=10. The average particle diameter is controlled to 2-5μm by granulometry, and further, the tap density of the powder is controlled to <=30% of the true density. The conductive flake powder is mixed with a caking agent and a solvent to constitute a paste. A circuit pattern is formed by this pasty composition, the composition is heated to remove the solvent and to solidify the caking agent, and a conductor is formed. Conductivity is exhibited by contact of the particles of the conductive flake powder with one another under such conditions.
|
