Circuit module and large-scale circuit system

A circuit module comprising:

• a circuit module substrate mounted on a large-scale circuit board and having an area smaller than the large-scale circuit board, the large-scale circuit board having a large-scale-circuit-board-side fitting structure part;
• an electronic circuit component mounted on the circuit module substrate;
• a plurality of circuit-module-substrate-side connection terminals at the circuit module substrate;
• and
• a circuit-module-substrate-side fitting structure part at the circuit module substrate, wherein
• the plurality of circuit-module-substrate-side connection terminals include an electric signal terminal configuring an electric signal path, and a high current terminal configuring a high current path of a power system,
• the plurality of circuit-module-substrate-side connection terminals are electrically connected to a plurality of large-scale-circuit-board-side connection terminals at the large-scale circuit board,
• the circuit-module-substrate-side fitting structure part and the large-scale-circuit-board-side fitting structure part are electrically connected and mechanically fixed to each other, and
• a non-conductive thermal adhesive layer is between a surface of the circuit module substrate and a surface of a base material of the large-scale circuit board facing to each other, the non-conductive thermal adhesive layer electrically insulating and thermally joining the surface of the circuit module substrate and the surface of the base material by a non-conductive thermally conductive material.