Patent ID: 7501584

Claim:
A circuit board unit comprising: a first substrate including, on a surface thereof, a first group of electrode terminals arranged in a matrix; a second substrate including, on a surface thereof, a second group of electrode terminals arranged in a matrix in alignment with said first group of electrode terminals; an anisotropic electrical conductor sandwiched between said first and second substrates, wherein said anisotropic electrical conductor includes either a metal wire selected from a gold wire, a copper wire, a brass wire, a phosphor bronze wire, a nickel wire, or a stainless wire as electrically conductive material, or one of gold-plated particles, silver-plated particles, and copper-plated particles; and a pressurizer pressurizing said first substrate, said anisotropic electrical conductor, and said second substrate wherein said first substrate, said anisotropic electrical conductor, and said second substrate are caused to electrically connect to each other, wherein said pressurizer is composed of a material having a spring characteristic.