Patent ID: 7262511
Filing Date: 2007-08-28
Classification: H01L,H05K

Abstract:
1. A conductive adhesive agent comprising, as major constituent parts, a metal component as a conductive medium and a thermosetting resin as an adhesive component, wherein the conductive adhesive agent contains, as essential components thereof: a metal powder (A) made of at least one metal material selected from the group consisting of silver, copper, gold, platinum, nickel, zinc, bismuth and tungsten, and having an average particle size selected to be in the range of 0.5 to 30 μm; ultrafine particles (B) that are composed of ultrafine metal particles with an average particle size selected to be in the range of 1 to 20 nm made of at least one metal material selected from the group consisting of silver, copper, gold, platinum, nickel, zinc and bismuth, and a covering layer of an organic compound being formed on the metal surface thereof; a thermosetting resin (C); and a solvent (D), and the ratio of blended amounts of said essential components in the conductive adhesive agent is such that provided that the blended amount A of said metal powder is 100 parts by weight, the blended amount B of said ultrafine particles is selected to be in the range of 1 to 10 parts by weight, the blended amount C of said thermosetting resin is selected to be in the range of 5 to 15 parts by weight, and the blended amount D of said solvent is selected to be 10 parts or less by weight wherein a mixture of spherical metal powder (A-