Patent ID: 7772025

Claim:
A manufacturing method of an electronic device, comprising: preparing an electronic element having a detecting part on one surface thereof and a base member; attaching an adhesive film having an electronic insulating property on the one surface of the electronic element and forming a hollow part at a portion of the adhesive film corresponding to the detecting part so that the hollow part and the detecting part have clearance therebetween; piling the electronic element and the base member through bumps and the adhesive film in a state where the one surface of the electronic element faces the base member; and electrically coupling the electronic element and the base member by the bumps, wherein: a piling of the electronic element and the base member, and a coupling by the bumps are carried out in a state where a first pressure in the hollow part is set to be at atmospheric pressure and a second pressure outside the hollow part is set to be lower than the atmospheric pressure; and expanding the adhesive film in a direction separating from the detecting part before attaching the adhesive film on the one surface of the electronic element.