Patent ID: 7971973

Claim:
An electrical connection structure, comprising: a first substrate which has a first electrode part; a second substrate which has a second electrode part opposing the first electrode part, and a wiring pattern connected to the second electrode part; an insulating cavity substrate which is disposed between the first substrate and the second substrate and has a through hole in a position corresponding to the first electrode part, the through hole being deeper than a sum of a height of the first electrode part and a height of the second electrode part and having an opening surface area not smaller than an area of the first electrode part; and conductive material which is filled in the through hole, wherein: the first substrate has a plurality of the first electrode parts arranged in a two-dimensional matrix configuration; there are a plurality of the second substrates mutually superimposed and bonded; each of the second substrates has a plurality of the second electrode parts respectively opposing a portion of the first electrode parts; the second electrode parts are arranged in the second substrates with no overlaps to each other between the second substrates: through holes of the second substrates are formed in at least one of the second substrates to which a further one of the second substrates is bonded on a far side from the insulating cavity substrate in a state of being mutually superimposed and bonded in positions corresponding to the second electrode parts in the further one of the second substrates; and the conductive material is filled in the through holes of the at least one of the second substrates.