Patent ID: 8166646

Claim:
A method for connecting two objects electrically by an electro conductive liquid, comprising: providing a substrate having a first surface and a second surface which is opposite to the first surface; forming a liquid-receiving portion, which receives the liquid, on the first surface of the substrate; forming a channel of the liquid in the substrate which communicates with the liquid-receiving portion; forming a through hole in the substrate which communicates with the channel and defines openings on the first and second surfaces, respectively; arranging the two objects to interpose the substrate, at positions at which the two objects overlap with the openings of the through hole, respectively; making a droplet of the liquid land on the liquid-receiving portion; filling the liquid landed on the liquid-receiving portion to the through hole via the channel, by a capillary force or a surface tension between the liquid and a channel-defining surface; bringing the liquid filled in the through hole in contact with the objects arranged to interpose the substrate at positions at which the two objects overlap with the openings of the through hole, respectively; and hardening the liquid filled in the through hole, wherein, when bringing the liquid filled in the through hole in contact with the objects, the liquid is supplied into the through hole, so that a surface of the liquid at an end opening of the through hole bulges to form a projection due to surface tension, and the projection of the surface of the liquid makes contact with one of the objects.