Connection structure and connection method of wiring board

A method of connecting, to a to-be-connected body having electric contacts, a wiring board including:

• (a) a flexible base formed of electrically insulating resin and having board-side contacts which are provided on a facing surface of the flexible base that is to face the to-be-connected body;
• and (b) a cover film which covers the facing surface of the flexible base except the board-side contacts and a non-covered partial region of the facing surface,
• the method comprising the steps of
• a first application step of applying electrically conductive resin including a metal material and thermosetting resin to one of the respective board-side contacts of the wiring board;
• and the respective electric contacts of the to-be-connected body, for permitting electrical conduction therebetween,
• a second application step of applying the electrically conductive resin to one of an area of the wiring board which extends across both of a surface of the cover film and a surface of the non-covered partial region of the flexible base;
• and an area of the to-be-connected body that is to face the area of the wiring board, for reinforcing connection between the to-be-connected body and the wiring board;
• and
• a bonding step of bonding the to-be-connected body and the wiring board by pressing, while heating, the to-be-connected body and the wiring board with the electric contacts of the to-be-connected body and the board-side contacts of the wiring board positioned relative to each other, after the first application step and the second application step.