Circuit module
There is provided a circuit module including a circuit substrate being a wiring substrate having a mount surface, a surface wiring layer disposed on the mount surface, and an inner wiring layer formed within the substrate, a first mount component mounted on the mount surface, a second mount component mounted on the mount surface, and electrically connected to the first mount component via the inner wiring layer, a sealing body formed on the mount surface, covering the first mount component and the second mount component and having a trench formed from a main surface of the sealing body to the surface wiring layer between the first mount component and the second mount component, and a shield having an inner shield section formed within the trench that abuts on the surface wiring layer and an outer shield section covering the sealing body and the inner shield section.
1. A circuit module, comprising:
a circuit substrate being a wiring substrate having a mount surface, a surface wiring layer disposed on the mount surface, and an inner wiring layer formed within the substrate, the surface wiring layer including a ground conductor disposed on the mount surface and connected to a ground potential, and lands;
a first mount component mounted on the mount surface via the lands;
a second mount component mounted on the mount surface via the lands, and electrically connected to the first mount component via the inner wiring layer;
a sealing body formed on the mount surface, covering the first mount component and the second mount component and having a trench formed to extend downward in a depth direction from an upper end thereof at a main surface of the sealing body to a bottom end thereof at a surface of the ground conductor and being disposed between the first mount component and the second mount component, the trench being in contact with the ground conductor at the bottom end of the trench; and
a shield having an inner shield section formed within the trench that abuts on the surface wiring layer and an outer shield section covering the sealing body and the inner shield section,
wherein the inner wiring layer includes a plurality of inner wiring layers, and
the first mount component and the second mount component are mutually electrically connected by an upper one of the inner wiring layers adjacent to the surface wiring layer and crossing beneath the bottom end of the trench and the ground conductor facing the bottom end of the trench when viewed in the depth direction of the trench.
2. The circuit module according to claim 1 , wherein
the circuit substrate further includes a component-containing layer formed between the plurality of inner wiring layers for containing a built-in component, and
the upper wiring layer is disposed closer to the mount surface than to the bottom of the component-containing layer.
3. The circuit module according to claim 2 , wherein
the circuit substrate further includes a conductive core section formed in the component-containing layer and disposed surrounding the built-in component.