Patent ID: 8835772

Claim:
A method for producing a connection structure in which an electrode of a circuit board and an electrode of an electrical element are connected to each other by anisotropic conductive connection, the method comprising a heating and pressurizing step of connecting the electrode of the circuit board and the electrode of the electrical element by placing the electrical element on the circuit board via an anisotropic conductive adhesive, and heating and pressurizing the placed electrical element, wherein a product formed by dispersing solder particles having a melting temperature Ts in an insulating acrylic-based thermosetting resin is used as the anisotropic conductive adhesive, and a temperature at which the anisotropic conductive adhesive shows a minimum melt viscosity is Tv, the following formulas (1) and (2) are satisfied Tv<T1<Ts<T2 (1) P1>P2 (2) when: the heating and pressurizing step includes a first heating and pressurizing step and a subsequent second heating and pressurizing step; a heating temperature in the first heating and pressurizing step is defined as T 1 , and an applied pressure in the step is defined as P 1 ; and a heating temperature in the second heating and pressurizing step is defined as T 2 , and an applied pressure in the step is defined as P 2 , in the first heating and pressurizing step, the anisotropic conductive adhesive is melted and caused to flow to be pressed out from a gap between the circuit board and the electrical element, and further to be precured, and in the second heating and pressurizing step, the solder particles are melted to form a metallic bond between the electrode of the circuit board and the electrode of the electrical element and to substantially cure the anisotropic conductive adhesive.