Patent ID: 12232269

DETAILED DESCRIPTION OF THE DISCLOSURE

First Embodiment

An electronic component module according to a first embodiment of the present disclosure will be described with reference to the drawings.FIG.1Ais a side cross-sectional view illustrating a configuration of an electronic component module according to the first embodiment.FIG.1Bis a first plan view illustrating a configuration of the electronic component module according to the first embodiment.FIG.1Cis a second plan view illustrating a configuration of the electronic component module according to the first embodiment. Note that, inFIGS.1B and1C, illustration of a shield film and an insulating resin is omitted. Furthermore, inFIG.1C, illustration of a conductive post and a terminal conductor for external connection is omitted.

As illustrated inFIGS.1A,1B, and1C, an electronic component module10includes a substrate20, an inductor element30, a mounting type electronic component411, a mounting type electronic component412, a mounting type electronic component42, an insulating resin51, an insulating resin52, a plurality of terminal conductors61, a plurality of conductive posts610, and a shield film70.

The substrate20has an insulating main body and includes a conductor pattern for realizing the electronic component module10. The substrate20is configured such that a plurality of insulator layers having a predetermined conductor pattern are stacked. Note that illustration of the conductor pattern formed inside the substrate20is omitted except for the inductor element30. The substrate20is a rectangular flat plate, and has a first main surface201and a second main surface202facing each other. The substrate20is a ceramic multilayer substrate. However, the substrate20may be a resin multilayer substrate.

Land conductors211and land conductors212are provided on first main surface201of substrate20. The number of land conductors211corresponds to the number of terminals of the mounting type electronic component411, and arrangement of the land conductors211corresponds to arrangement of the terminals of the mounting type electronic component411. The number of land conductors212corresponds to the number of terminals of the mounting type electronic component412, and arrangement of the land conductors212corresponds to arrangement of the terminals of the mounting type electronic component412.

Land conductors221and terminal conductors for external connection290are provided on the second main surface202of substrate20. The number of land conductors221corresponds to the number of terminals of the mounting type electronic component42, and arrangement of the land conductors221corresponds to arrangement of the terminals of the mounting type electronic component42. As illustrated inFIG.1C, the terminal conductors for external connection290are arranged along an outer peripheral end in the vicinity of the outer peripheral end on the second main surface202of the substrate20. The land conductors221are arranged in a region surrounded by the plurality of terminal conductors for external connection290.

The inductor element30includes a plurality of inductor conductors300. The plurality of inductor conductors300are disposed at intervals in a thickness direction of the substrate20. The plurality of inductor conductors300is each a wound linear conductor, and are disposed so that central openings of the windings overlap when the substrate20is viewed in a direction orthogonal to the first main surface201and the second main surface202.

The plurality of inductor conductors300are connected in order with an interlayer connection conductor or the like (not illustrated) interposed therebetween. As a result, the inductor element30is an element having a spiral conductor pattern. An axial direction of the spiral shape is parallel to the direction orthogonal to the first main surface201and the second main surface202.

With this configuration, the inductor element30is disposed inside the substrate20.

The mounting type electronic component411, the mounting type electronic component412, and the mounting type electronic component42are an IC using a semiconductor substrate, an SAW device or a BAW device using a piezoelectric body, or the like. The mounting type electronic component411and the mounting type electronic component412correspond to a “first electronic component” of the present disclosure. The mounting type electronic component42corresponds to a “second electronic component” of the present disclosure.

The mounting type electronic component411is bonded (mounted) to the land conductors211by using solder or the like. The mounting type electronic component412is bonded (mounted) to the land conductors212by using solder or the like. The mounting type electronic component42is bonded (mounted) to the land conductors221by using solder or the like.

The conductive posts610are, for example, columnar conductors. The conductive posts610are bonded (mounted) to the terminal conductors for external connection290by using solder or the like. As each of the conductive posts610, a protruding electrode, a metal pin, plating, or the like is used. A solder bump may be used instead of the conductive post.

The insulating resin51covers the first main surface201side of the substrate20. The insulating resin51also covers the mounting type electronic component411and the mounting type electronic component412. Note that a thickness of the insulating resin51is preferably a minimum thickness that covers the mounting type electronic component411and the mounting type electronic component412.

The insulating resin52covers the second main surface202side of the substrate20. The insulating resin52covers the mounting type electronic component42and the conductive posts610. However, a surface of the mounting type electronic component42opposite to a mount surface and surfaces of the conductive posts610opposite to surfaces bonded to the terminal conductors for external connection290are exposed from the insulating resin52. The insulating resin51and the insulating resin52can protect the mounting type electronic component411, the mounting type electronic component412, the mounting type electronic component42, and the conductor patterns formed on the first main surface201and the second main surface202of the substrate20from an external environment.

The terminal conductors61are provided on the surfaces of the conductive posts610opposite to the surfaces bonded to the terminal conductors for external connection290.

The shield film70is a conductive film. The shield film70covers an entire outer surface of the insulating resin51, entire side surfaces of the substrate20, and entire side surfaces of the insulating resin52. By thus disposing the shield film70, it is possible to suppress unnecessary coupling and interference between the mounting type electronic component411, the mounting type electronic component412, the mounting type electronic component42, and the electric configuration provided on the substrate20and the external environment.

With such a configuration, the electronic component module10forms, for example, at least a part of a front-end module for wireless communication of a high frequency signal. The inductor element30is used in an impedance matching circuit between circuit elements constituting the front-end module. For example, the inductor element30is used in an impedance matching circuit between a filter or a duplexer and a power amplifier (PA) and in an impedance matching circuit between a filter or a duplexer and a low noise amplifier (LNA).

Since the inductor element30is built in the substrate20as described above, a distance between the inductor element30and the shield film70can be increased as compared with an aspect in which the inductor element30is mounted on the first main surface201of the substrate20. As a result, coupling between a magnetic field generated by the inductor element30and the shield film70is suppressed, and deterioration of characteristics of the inductor element30is suppressed.

Furthermore, since the inductor element30is built in the substrate20, a distance between the inductor element30and another circuit board on which the electronic component module10is mounted can be increased as compared with an aspect in which the inductor element30is mounted on the second main surface202of the substrate20. As a result, coupling between the magnetic field generated by the inductor element30and a conductor pattern of the other circuit board is suppressed, and deterioration of characteristics of the inductor element30is suppressed.

Furthermore, since the inductor element30is built in the substrate20, a height of the electronic component module can be reduced as compared with an aspect in which the inductor element30is mounted on the first main surface201or the second main surface202of the substrate20. That is, the electronic component module10can be reduced in size. In particular, as described above, an inductor used in an impedance matching circuit needs to have a relatively large shape because of required characteristics thereof. Therefore, in a case where the inductor element30is built in the substrate20, it is possible to reduce the size more effectively.

According to the above configuration, the inductor element30is disposed in a region surrounded by the terminal conductors for external connection290, as illustrated inFIG.1C. As a result, a distance between the inductor element30and a side surface portion of the shield film70can also be increased. Therefore, it is also possible to suppress coupling of the magnetic field generated by the inductor element30with the side surface portion of the shield film70and to suppress characteristic deterioration of the inductor element30.

According to the configuration of electronic component module10described above, the inductor element30overlaps the mounting type electronic component411and the mounting type electronic component42when the electronic component module10(the substrate20) is viewed in a direction orthogonal to the first main surface201and the second main surface202of the substrate20(hereinafter referred to as a plan view in the present embodiment and other embodiments). In this configuration, the mounting type electronic component411and the mounting type electronic component42are electronic components mainly composed of a semiconductor or a piezoelectric body and are therefore flip-chip mounted. In this case, interference between the mounting type electronic component411and the mounting type electronic component42and the magnetic field generated by the inductor element30is kept small since the distance between the inductor element30and the mounting type electronic component411and the mounting type electronic component42can be increased. Therefore, even in a case where the inductor element30overlaps the mounting type electronic component411and the mounting type electronic component42, deterioration of the characteristics of the inductor element30is suppressed.

Second Embodiment

An electronic component module according to a second embodiment of the present disclosure will be described with reference to the drawings.FIG.2is a side cross-sectional view illustrating a configuration of an electronic component module according to the second embodiment.

As illustrated inFIG.2, an electronic component module10A according to the second embodiment is different from the electronic component module10according to the first embodiment in that an inductor element30M is provided instead of the inductor element30. Other configurations of the electronic component module10A are similar to those of the electronic component module10, and description of the similar parts will be omitted.

The electronic component module10A includes the inductor element30M. The inductor element30M is a chip type electronic component. The inductor element30M is mounted inside a substrate20.

Even with such a configuration, the electronic component module10A can suppress characteristic deterioration of the inductor element30M and can be reduced in size, as in the case of the electronic component module10.

Third Embodiment

An electronic component module according to a third embodiment of the present disclosure will be described with reference to the drawings.FIG.3is a side cross-sectional view illustrating a configuration of an electronic component module according to the third embodiment.

As illustrated inFIG.3, an electronic component module10B according to the third embodiment is different from the electronic component module10according to the first embodiment in position of an inductor element30. Other configurations of the electronic component module10B are similar to those of the electronic component module10, and description of the similar parts will be omitted.

In the electronic component module10B, the inductor element30is disposed so as not to overlap a mounting type electronic component411in plan view.

Even with such a configuration, the electronic component module10B can suppress characteristic deterioration of the inductor element30and can be reduced in size, as in the case of the electronic component module10. In addition, with this configuration, even if the mounting type electronic component411is one that affects a magnetic field, influence of the mounting type electronic component411on a magnetic field of the inductor element30can be suppressed. Therefore, characteristic deterioration of the inductor element30is suppressed.

Fourth Embodiment

An electronic component module according to a fourth embodiment of the present disclosure will be described with reference to the drawings.FIG.4is a side cross-sectional view illustrating a configuration of an electronic component module according to the fourth embodiment.

As illustrated inFIG.4, an electronic component module10C according to the fourth embodiment is different from the electronic component module10B according to the third embodiment in that an inductor element30M is provided instead of the inductor element30. Other configurations of the electronic component module10C are similar to those of the electronic component module10B, and description of the similar parts will be omitted.

The electronic component module10C includes the inductor element30M. The inductor element30M is a chip type electronic component. The inductor element30M is mounted inside a substrate20. The inductor element30M is disposed so as not to overlap a mounting type electronic component411in plan view.

Even with such a configuration, the electronic component module10C can suppress characteristic deterioration of the inductor element30M and can be reduced in size, as in the case of the electronic component module10B.

Fifth Embodiment

An electronic component module according to a fifth embodiment of the present disclosure will be described with reference to the drawings.FIG.5is a side cross-sectional view illustrating a configuration of an electronic component module according to the fifth embodiment.

As illustrated inFIG.5, an electronic component module10D according to the fifth embodiment is different from the electronic component module10according to the first embodiment in position of an inductor element30. Other configurations of the electronic component module10D are similar to those of the electronic component module10, and description of the similar parts will be omitted.

In the electronic component module10D, the inductor element30is disposed so as to overlap a mounting type electronic component412and so as not to overlap a mounting type electronic component42in plan view.

Even with such a configuration, the electronic component module10D can suppress characteristic deterioration of the inductor element30and can be reduced in size, as in the case of the electronic component module10. In addition, with this configuration, even if the mounting type electronic component42is one that affects a magnetic field, influence of the mounting type electronic component42on a magnetic field of the inductor element30can be suppressed. Therefore, characteristic deterioration of the inductor element30is suppressed.

Sixth Embodiment

An electronic component module according to a sixth embodiment of the present disclosure will be described with reference to the drawings.FIG.6is a side cross-sectional view illustrating a configuration of an electronic component module according to the sixth embodiment.

As illustrated inFIG.6, an electronic component module10E according to the sixth embodiment is different from the electronic component module10D according to the fifth embodiment in that an inductor element30M is provided instead of the inductor element30. Other configurations of the electronic component module10E are similar to those of the electronic component module10D, and description of the similar parts will be omitted.

The electronic component module10E includes the inductor element30M. The inductor element30M is a chip type electronic component. The inductor element30M is mounted inside a substrate20. The inductor element30M is disposed so as to overlap a mounting type electronic component412and so as not to overlap a mounting type electronic component42in plan view.

Even with such a configuration, the electronic component module10E can suppress characteristic deterioration of the inductor element30M and can be reduced in size, as in the case of the electronic component module10D.

Seventh Embodiment

An electronic component module according to a seventh embodiment of the present disclosure will be described with reference to the drawings.FIG.7is a side cross-sectional view illustrating a configuration of an electronic component module according to the seventh embodiment.

As illustrated inFIG.7, an electronic component module10F according to the seventh embodiment is different from the electronic component module10according to the first embodiment in position of an inductor element30. Other configurations of the electronic component module10F are similar to those of the electronic component module10, and description of the similar parts will be omitted.

In the electronic component module10F, the inductor element30is disposed so as not to overlap a mounting type electronic component411, a mounting type electronic component412, and a mounting type electronic component42in plan view. That is, the inductor element30is disposed so as not to overlap all of the mounting type electronic components mounted on a substrate20.

Even with such a configuration, the electronic component module10F can suppress characteristic deterioration of the inductor element30and can be reduced in size, as in the case of the electronic component module10. In addition, with this configuration, even if the mounting type electronic component411, the mounting type electronic component412, and the mounting type electronic component42are ones that affect a magnetic field, influence of the mounting type electronic component411, the mounting type electronic component412, and the mounting type electronic component42on a magnetic field of the inductor element30can be suppressed. Therefore, characteristic deterioration of the inductor element30is suppressed.

Eighth Embodiment

An electronic component module according to an eighth embodiment of the present disclosure will be described with reference to the drawings.FIG.8is a side cross-sectional view illustrating a configuration of an electronic component module according to the eighth embodiment.

As illustrated inFIG.8, an electronic component module10G according to the eighth embodiment is different from the electronic component module10F according to the seventh embodiment in that an inductor element30M is provided instead of the inductor element30. Other configurations of the electronic component module10G are similar to those of the electronic component module10F, and description of the similar parts will be omitted.

The electronic component module10G includes the inductor element30M. The inductor element30M is a chip type electronic component. The inductor element30M is mounted inside a substrate20. The inductor element30M is disposed so as not to overlap a mounting type electronic component411, a mounting type electronic component412, and a mounting type electronic component42in plan view. That is, the inductor element30M is disposed so as not to overlap all of the mounting type electronic components mounted on a substrate20.

Even with such a configuration, the electronic component module10G can suppress characteristic deterioration of the inductor element30M and can be reduced in size, as in the case of the electronic component module10F.

Ninth Embodiment

An electronic component module according to a ninth embodiment of the present disclosure will be described with reference to the drawings.FIG.9is a side cross-sectional view illustrating a configuration of an electronic component module according to the ninth embodiment.

As illustrated inFIG.9, an electronic component module10H according to the ninth embodiment is different from the electronic component module10according to the first embodiment in that mounting type electronic components are mounted only on a first main surface201side of a substrate20and no mounting type electronic component is mounted on a second main surface202side. Other configurations of the electronic component module10H are similar to those of the electronic component module10, and description of the similar parts will be omitted.

An inductor element30is formed in the substrate20. A mounting type electronic component411and a mounting type electronic component412are mounted on the first main surface201of the substrate20. When the substrate20is viewed in plan view, the inductor element30overlaps the mounting type electronic component411.

On the second main surface202side of the substrate20, terminal conductors61are provided, and no mounting type electronic component is mounted.

As described above, the electronic component module10H has a configuration of a so-called single-sided mounting substrate. Even with such a configuration of the single-sided mounting substrate, similar effects to the electronic component module10can be produced since the inductor element30is built in the substrate20, and the inductor element30and the mounting type electronic component411overlap each other in plan view.

Also in the present embodiment, the configuration of the second embodiment in which the inductor element30M is provided, the configuration of the third and fourth embodiments in which the mounting type electronic component and the inductor element do not overlap in plan view, the configuration of the fifth and sixth embodiments in which the inductor element does not overlap one of a plurality of mounting type electronic components in plan view, the configuration of the seventh and eighth embodiments in which the inductor element does not overlap any of a plurality of mounting type electronic components in plan view, and the like can be applied.

It is preferable that a planar ground conductor provided on the substrate20does not overlap the inductor element30or the inductor element30M at all in plan view although this is not illustrated in the above embodiments. This makes it possible to further suppress deterioration in characteristics of the inductor element30and the inductor element30M.

Although a case where one inductor element is provided is illustrated in the above embodiments, in a case where a plurality of inductor elements are provided, the plurality of inductor elements are preferably disposed in the substrate20. This makes it possible to reduce the size of the electronic component module while suppressing characteristic deterioration of all of the inductor elements. In this case, an inductor element having a relatively large shape is preferentially built in the substrate20, like the above inductor element for an impedance matching circuit. That is, in a case where there is an inductor element that cannot be built in the substrate20, a relatively large inductor element such as an inductor element for an impedance matching circuit may be built in, and a relatively small inductor element may be mounted on the first main surface201or the second main surface202of the substrate20. However, in this case, it is preferable that the relatively small inductor element is mounted on the second main surface202of the substrate20, and accordingly, it is preferable that the other circuit board on which the electronic component module is mounted does not have a planar conductor pattern in a portion facing the inductor element.

In addition, the configurations of the above embodiments can be appropriately combined, and effects according to the respective combinations can be produced.10,10A,10B,10C,10D,10E,10F,10G,10H electronic component module20substrate30,30M inductor element411,412,42mounting type electronic component51,52insulating resin61terminal conductor70shield film201first main surface202second main surface211,212,221land conductor290terminal conductor for external connection300inductor conductor610conductive post