Patent ID: 8054646

Claim:
A circuit board connecting structure comprising: a first circuit board having first circuit patterns on a surface of a first base material, the first circuit patterns arranged in parallel to one another, and the first base material being flexible and expanding when heated; and a second circuit board having second circuit patterns on a surface of a second base material, the second circuit patterns arranged in parallel to one another, and the second base material being rigid, wherein the second circuit patterns includes a conductor pattern having a bottom surface adjacent the second base material and a top surface distal from the second base material, the top surface of the conductor pattern being narrower than the bottom surface, the first circuit patterns includes a branch pattern including two electrically connected circuit patterns and a groove defined between the two electrically connected circuit patterns, the groove having a portion wider than the top surface of the conductor pattern and narrower than the bottom surface of the conductor pattern, the groove including a bottom that is plated, the two electrically connected circuit patterns of the branch pattern being electrically connected with each other through the plated bottom and the conductor pattern is, when the first circuit board and the second circuit board are connected to each other, (i) disposed in the groove, whereby movement of the first circuit patterns relative to the second circuit patterns is restricted and (ii) electrically connected to the branch pattern.