| 摘要 |
PROBLEM TO BE SOLVED: To obtain a grain suitable to form a conductor pattern for a ceramic green sheet by coating the surface of the metal grain with a thermoplastic insulating material to insulate it and making the average grain diameter within a specified range. SOLUTION: The average grain diameter of metal is 2-20μm, preferably 3-10μm. The content of a thermoplastic insulating material occupied in the grain is <=20 wt.% and the resistance value of the grain is preferably >=10<12>Ω.cm and copper, tungsten, nickel or silver is appropriate as the metal grain. A monomer is polymerized directly on the surface of the metal grain to preferably form a coating film consisting of the thermoplastic insulating material on the surface of the metal grain and a PE resin film is desirably formed by using a gaseous monomer. The grain diameter of a carrier in a two-components development method with which a developer is made by mixing it with the carrier is preferably 40-120μm and the content of the metal grain in the developer is 2-20 wt.%, preferably 3-10 wt.%. This grain is appropriately used as a toner in the developer of electrophotography.
|
