Patent ID: 7229293

Claim:
A connecting structure of a circuit board, comprising: a first circuit board including a first resin base material which is softenable by heating and which has a fusing property, and a plurality of first conductor patterns formed at a surface of said first resin base material; a second circuit board including a second resin base material, and a plurality of second conductor patterns formed on said second resin base material with a same pitch as that of said first conductor patterns; wherein said first conductor patterns and said second conductor patterns are respectively mechanically contacted with each other to provide electrical conduction; wherein said second conductor patterns that are respectively mechanically contacted with said first conductor patterns have widths that are respectively narrower than widths of said first conductor patterns; wherein said first conductor patterns and said second conductor patterns are buried in said first resin base material of said first circuit board; and wherein said first resin base material of said first circuit board is bonded to said second resin base material of said second circuit board, thereby connecting said first circuit board and said second circuit board to each other.