Electronic device filled with phase change material between plurality of circuit boards connected by connecting members

An electronic device comprising:

• a first circuit board;
• a second circuit board;
• at least one circuit element disposed on the second circuit board;
• a connecting member disposed between the first circuit board and the second circuit board facing the first circuit board to form an internal space surrounding the at least one circuit element, and to electrically connect the first circuit board and the second board;
• a phase change material (PCM) disposed in the internal space and configured to change a state thereof by absorbing heat generated by the at least one circuit element;
• a first resin applied to at least a portion between the first circuit board and the connecting member;
• and
• a second resin applied to at least a portion between the second circuit board and the connecting member,
• wherein the first resin and the second resin block the phase change material, which is in a liquid phase, from passing therethrough.