Method for producing anisotropic conductive adhesive for fine pitch and anisotropic conductive adhesive for fine pitch produced by the method

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an anisotropic conductive adhesive for fine pitch, and an anisotropic conductive adhesive for fine pitch produced by the method. SOLUTION: (i) a step of removing an oxide film of solder particles that is melted in a certain temperature range using a first reducing agent and has a function of self-bonding and self-orienting between metal terminals of a substrate; And (ii) removing the water generated during the step (i), and (iii) the solder particles from which the oxide film and the water have been removed in the steps (i) and (ii) and the binder resin. Mixing to produce an anisotropic conductive adhesive, wherein step (iii) is performed with contact with oxygen interrupted. [Selection diagram] Figure 1