Patent ID: 7605021

Claim:
A manufacturing method of manufacturing an electronic device, comprising the steps of: applying a thermosetting adhesive on a surface of a base that is formed such that a conductive pattern is formed on a film made of a resin, the surface of the base being a side of the base on which side the conductive pattern is formed; mounting a circuit chip to be connected to the conductive pattern, on the base through the thermosetting adhesive; holding the base while pinching a circuit chip side of the base and a film side of the base by a heating apparatus that heats the thermosetting adhesive, the heating apparatus including a pressing section that presses the base by abutting on the circuit chip side of the base and a supporting section that supports the base by abutting on the film side of the base; giving a tension to the base on which the circuit chip is mounted, in a direction in which the film spreads; and heating the thermosetting adhesive by the heating apparatus to cure the thermosetting adhesive, thereby fixing the circuit chip to the conductive pattern, wherein the step of giving a tension is a step of holding portions of the film on both sides of the mounting area of the film in which mounting area the circuit chip is mounted, and pulling the portions in a direction in which the portions move away from each other.