Electrode Connecting Method

An electrode connecting method, comprising:

• a step of producing (i) a first circuit board comprising a plurality of first electrodes spaced at a first distance and (ii) a second circuit board having a thermal expansion rate less than that of the first circuit board and comprising a plurality of second electrodes spaced at a second distance, such that a difference in dimension between the first distance and the second distance falls within a particular permissible range;
• a dehydrating step of dehydrating the first circuit board so as to reduce the first distance;
• a step of causing the plurality of first electrodes and the plurality of second electrodes to be respectively opposed to each other, with a thermosetting adhesive interposed between the first circuit board and the second circuit board;
• a heating step of heating the thermosetting adhesive and at least the first circuit board of the first circuit board and the second circuit board;
• and
• a step of bringing the first circuit board and the second circuit board into pressing contact with each other.