Circuit module

A circuit module, comprising:

• a circuit board having an electrical insulating layer and a ground layer, wherein the electrical insulating layer has a mounting surface, and the ground layer is provided on a side of the electrical insulating layer opposite to the mounting surface;
• a plurality of electronic components mounted on the mounting surface and including a first electronic component and a second electronic component, wherein the first electronic component acts as a source of noise and the second electronic component is an object to be protected from the noise generated in the first electronic component;
• a plurality of conductor posts including a group of conductor posts arranged so as to traverse between the first electronic component and the second electronic component on the mounting surface and electrically connected to the ground layer;
• a mold layer having electrical insulation and provided on the mounting surface so as to seal the plurality of electronic components and the plurality of conductor posts;
• and
• a shield layer covering a surface on a side of the mold layer opposite to the mounting surface,
• wherein the shield layer includes a slit, and with respect to each conductor post included in the group of the conductor posts, in a plan view, the silt passes and extends between the conductor posts and the first electronic component, or between the conductor posts and the second electronic component.