Electronic circuit device and method for manufacturing the same

An electronic circuit device comprising:

• a circuit board;
• a coating resin;
• and
• a chip component that includes:
• an element substrate having a first main surface and a second main surface that oppose each other;
• an insulator layer on a side of the first main surface of the element substrate;
• a coil conductor disposed inside the insulator layer and configured to generate or receive a magnetic flux having a vertical component of the first main surface of the element substrate;
• and
• a chip component side mounting electrode on the first main surface side and connecting the coil conductor or a circuit including the coil conductor to the circuit board,
• wherein the circuit board has a circuit board side electrode that is connected to the chip component side mounting electrode,
• wherein the chip component side mounting electrode is connected to the circuit board side electrode,
• wherein the coating resin covers a mounting surface of the circuit board on which the chip component is mounted,
• wherein the electronic circuit device further includes an insulator exposed portion in which the insulator layer surrounded by the element substrate is exposed,
• wherein a surface that includes the second main surface, the insulator exposed portion, and the coating resin of the element substrate forms a continuous surface, and
• wherein at least a part of a coil opening formed by the coil conductor is in a formation region of the insulator exposed portion when viewed in a direction perpendicular to the second main surface of the element substrate.