Patent ID: 8240035

Claim:
A manufacturing method for a circuit module, comprising: a step of preparing a mother board including a first principal surface and a second principal surface opposed to the first principal surface; a step of mounting a plurality of electronic components on the first principal surface of the mother board; a step of forming an insulator layer to cover the first principal surface of the mother board and the plurality of electronic components; a first step of cutting the insulator layer such that unevenness is created in a principal surface of the insulator layer and the insulator layer has a predetermined thickness; a second step of cutting the insulator layer and the mother board to form a dividing groove that extends entirely through the insulator layer and partially through the mother board such that a bottom surface of the dividing groove does not extend to the second principal surface of the mother board; a step of coating an electrically conductive resin on the principal surface of the insulator layer to form a shield layer; and a step of dividing the mother board, on which the insulator layer and the shield layer are formed, along the dividing groove to thereby obtain a plurality of circuit modules.