Patent ID: 8724334

Claim:
A circuit module comprising: a board; a plurality of electronic components mounted on a principal surface of the board; an insulator layer covering the principal surface of the board and the electronic components, the insulator layer including uneven portions in an upper principal surface thereof; and a shield layer disposed on the upper principal surface of the insulator layer, on lateral surfaces of the insulator layer located on opposite ends of the upper principal surface of the insulator layer, and on lateral surfaces of the board located on opposite ends of the principal surface of the board that correspond to the opposite ends of the upper principal surface of the insulator layer, and being made of an electrically conductive resin; wherein the uneven portions are defined by: at least one groove provided in the upper principal surface of the insulator layer and extending towards a lower principal surface of the insulator layer but not entirely through the insulating layer to the lower principal surface; and at least one projection provided in the upper principal surface of the insulator layer and extending away from the lower principal surface of the insulator layer; and at least one of the at least one groove and at least one of the at least one projection are disposed directly over at least one of the plurality of electronic components.