Patent ID: 12193148

DETAILED DESCRIPTION OF EMBODIMENTS

In general, the figures indicate a dimensional ratio, which does not necessarily provide a representation according to scale, and may be exaggerated for convenience of illustration. In the following description, when referring to a concept of being upper or lower, it does not necessarily mean being absolutely upper or lower and may instead mean being relatively upper or lower in a position shown in a figure.

First Exemplary Embodiment

A module according to a first exemplary embodiment will now be described with reference toFIGS.1to4.FIG.1shows an external view of a module101according to the present embodiment. Module101has upper and side surfaces covered with a shield film8. A sealing resin6(seeFIG.3), which will be described hereinafter, is disposed in a space inside shield film8. A transparent plan view of module101is shown inFIG.2. For purposes of this disclosure, the phrase “transparent plan view” as referred to herein means a plan view in a state in which shield film8covering the upper surface of module101is removed and sealing resin6introduced in the space inside shield film8is also removed. In the other following embodiments as well, when a “transparent plan view” is referred to, it shall mean a similar plan view.FIG.3is a cross section taken along a line indicated inFIG.2. Note, however, that the cross section shows a state in which shield film8and sealing resin6covering the upper surface are present. The same applies to the other following embodiments.

In this aspect, module101comprises a wiring substrate1having a major surface1a(e.g., a first principal surface), a plurality of components3ato3fmounted on major surface1a, and a conductor incorporated resin body201mounted on major surface1a. Conductor incorporated resin body201includes a conductor pattern211therein. Conductor pattern211is grounded. Conductor pattern211is grounded by electrically connecting shield film8formed on the side surface of module101to conductor pattern211, and furthermore, electrically connecting shield film8to a GND electrode provided to wiring substrate1. Wiring substrate1has a lower surface1b(e.g., a second principal surface) as a surface opposite to major surface1a. An external electrode15is disposed on lower surface1b. A conductor pattern14and a conductor via16are appropriately disposed in wiring substrate1. In the example shown inFIG.3, conductor via16connected to external electrode15is shown.

FIG.4is an exploded view of conductor incorporated resin body201. Conductor incorporated resin body201is formed, for example, by stacking a plurality of resin layers212and bonding them together by thermal compression bonding. Conductor pattern211is formed on some of the plurality of resin layers212. Conductor pattern211is disposed on one or opposite surfaces of resin layer212. In this way, conductor incorporated resin body201is configured as a multilayer resin substrate.

As shown inFIG.2, components3a,3b,3c,3d,3eand3fare mounted on major surface1aof wiring substrate1. Sealing resin6is disposed to seal component3a,3b,3c,3d,3eand3f. Shield film8is formed so as to cover upper and side surfaces of sealing resin6. Moreover, conductor pattern211is electrically connected to a portion of shield film8covering the side surface of sealing resin6.

While wiring substrate1is a low temperature co-sintered ceramic substrate, it may be a resin substrate. The sealing resin is, for example, epoxy resin. The conductor incorporated resin body is, for example, a stack of resin sheets each having a copper foil attached thereto with a prescribed pattern formed. The resin sheet is made of a thermoplastic resin. The thermoplastic resin as referred to herein is, for example, any of liquid crystal polymer (LCP), polyether ether ketone (PEEK), thermoplastic polyimide (thermoplastic PI), thermoplastic fluororesin, and the like.

In the present embodiment, conductor incorporated resin body201includes a wall-shaped portion219(or simply a “wall”). In an example indicated in the present embodiment, conductor incorporated resin body201is entirely wall-shaped portion219. Moreover, conductor pattern211is disposed in the wall-shaped portion and can be a linear pattern in an exemplary aspect.

In the exemplary aspect, conductor incorporated resin body201has an L-shape in plan view. Moreover, conductor incorporated resin body201has opposite ends electrically connected to shield film8. In one aspect, conductor incorporated resin body201is disposed between components3cand3fFurthermore, conductor incorporated resin body201is disposed between components3cand3b. That is, conductor incorporated resin body201is disposed between a plurality of mounted components. In the present embodiment, component3cis disposed with two sides thereof surrounded by the L-shaped conductor incorporated resin body201as shown inFIG.2, for example. When attention is paid to a combination of the L-shaped conductor incorporated resin body201and shield film8, component3chas its periphery entirely surrounded by a conductor in plan view. That is, conductor incorporated resin body201is disposed so as to isolate a portion of sealing resin6from another portion thereof and conductor pattern211is connected to shield film8.

In the present embodiment, conductor incorporated resin body201having conductor pattern211incorporated therein is mounted on major surface1aof wiring substrate1, and conductor incorporated resin body201is configured as a shield. Conductor incorporated resin body201is only mounted on major surface1a, and laser processing is not required for mounting it in an exemplary aspect. Therefore, the wiring substrate is not damaged.

As described above, in the present embodiment, a shield can be disposed in a vicinity of a mounted component without damaging a wiring substrate.

As has been indicated in the present embodiment, preferably, the conductor incorporated resin body201comprised by the module includes a wall-shaped portion, the wall-shaped portion has the conductor pattern disposed therein, and the conductor pattern is a linear pattern. With this configuration, the conductor incorporated resin body can be mounted while occupying a small area, and a shield can be configured by the incorporated conductor pattern. While the example indicated in the present embodiment is predicated on that conductor incorporated resin body201is entirely wall-shaped portion219, the conductor incorporated resin body may have a structure including a wall-shaped portion and a portion other than the wall-shaped portion. That is, preferably, at least a part of the conductor incorporated resin body is a wall-shaped portion.

As indicated in the present embodiment, preferably, sealing resin6that seals the component on major surface1ais provided, and the wall-shaped portion is disposed so as to isolate a portion of sealing resin6from another portion. By adopting this configuration, a compartment shield is implemented.

As indicated in the present embodiment, preferably, shield film8that covers the upper and side surfaces of sealing resin6is provided, shield film8is grounded, and the wall-shaped portion is disposed so that the conductor pattern is electrically connected to shield film8. By adopting this configuration, a shield configured by the wall-shaped portion of the conductor incorporated resin body can be grounded by the surrounding shield film8, and the entire shield can thus be grounded efficiently.

While the present embodiment has been described by referring to an example in which conductor incorporated resin body201is formed by stacking a plurality of resin layers212and bonding them together by thermal compression bonding, that is, a multilayer resin substrate, the “conductor incorporated resin body” is not limited to a multilayer resin substrate. The conductor incorporated resin body may be any object formed of resin with some conductor incorporated therein. It is noted that the conductor incorporated resin body implemented by a multilayer resin substrate has been indicated by way of example. Moreover, the conductor incorporated resin body can be produced in a different method.

The conductor incorporated resin body is preferably a multilayer resin body. By adopting this configuration, the conductor incorporated resin body can be produced by stacking resin layers, and thus easily formed in a desired structure.

Second Exemplary Embodiment

A module according to a second exemplary embodiment will now be described with reference toFIGS.5to7.FIG.5is a transparent plan view of a module102in the present embodiment.FIG.6is a cross section taken along a line VI-VI indicated inFIG.5.

Module102comprises a conductor incorporated resin body202instead of conductor incorporated resin body201. Conductor incorporated resin body202is mounted on major surface1aof wiring substrate1.FIG.7is an exploded view of conductor incorporated resin body202. A conductor via213is formed in some of the plurality of resin layers212. As shown, conductor via213penetrates resin layer212in a thickness-wise direction. Conductor incorporated resin body202has conductor patterns211electrically interconnected by conductor via213. As shown inFIG.5, conductor pattern211has an L-shape, and conductor via213is located at a corner of conductor pattern211. At the corner of conductor pattern211, a plurality of conductor vias213are provided contiguously in the thickness-wise direction. Conductor incorporated resin body202includes wall-shaped portion219.

The remainder in configuration is similar to module101described in the first embodiment. In the configuration of the present embodiment, conductor pattern211and conductor via213are connected to each other, and conductor pattern211can be connected to the GND electrode of wiring substrate1via conductor via213. Therefore, the conductor incorporated resin body can have conductor pattern211grounded even if wiring pattern211is not electrically connected to shield film8.

In general, it is noted that the present embodiment can have an effect similar to that described in the first embodiment.

Third Exemplary Embodiment

A module according to a third exemplary embodiment will now be described with reference toFIG.8.FIG.8is a cross section of a module103in the present embodiment.

Module103comprises a conductor incorporated resin body203instead of conductor incorporated resin body201. Conductor incorporated resin body203is mounted on major surface1aof wiring substrate1. In conductor incorporated resin body203, when attention is paid to two conductor patterns211adjacent to each other in a vertical direction, a plurality of conductor vias213are disposed between these conductor patterns211. When attention is paid to two resin layers212adjacent to each other in the vertical direction, conductor vias213penetrating these resin layers212, respectively, are disposed so as to be shifted in position, rather than contiguous in the vertical direction. In other words, conductor incorporated resin body203includes conductor via213therein, and conductor pattern211and conductor via213are combined to form a structure made of a conductor.

The remainder in configuration is similar to module101described in the first embodiment. In general, it is noted that the present embodiment can have an effect similar to that described in the first embodiment.

Fourth Exemplary Embodiment

A module according to a fourth exemplary embodiment will now be described with reference toFIG.9.FIG.9is a cross section of a module104in the present embodiment.

As shown, module104comprises a conductor incorporated resin body204instead of conductor incorporated resin body201. Conductor incorporated resin body204is mounted on major surface1aof wiring substrate1. Conductor incorporated resin body204has conductor pattern211divided into small pieces. Conductor patterns211are interconnected by conductor via213. A plurality of conductor vias213are disposed contiguously in the thickness-wise direction.

In general, it is noted that the present embodiment can have an effect similar to that described in the first embodiment. Further, the conductor pattern is choppy, which suppresses generation of an eddy current caused by an electromagnetic wave.

Fifth Exemplary Embodiment

A module according to a fifth exemplary embodiment will now be described with reference toFIG.10.FIG.10is a cross section of a module105in the present embodiment.

Module105comprises a conductor incorporated resin body205instead of conductor incorporated resin body201. Conductor incorporated resin body205is mounted on major surface1aof wiring substrate1. Conductor incorporated resin body205has conductor pattern211divided into small pieces. When attention is paid to two resin layers212adjacent to each other in the vertical direction, conductor vias213penetrating these resin layers212, respectively, are disposed so as to be shifted in position, rather than contiguous in the vertical direction.

In the example indicated herein, conductor vias213are further provided on an upper surface of that conductor pattern211in conductor incorporated resin body205which is located on an uppermost side, and these conductor vias213are electrically connected to shield film8covering an upper surface of sealing resin6. Thus electrically connecting conductor pattern21to shield film8covering the upper surface of sealing resin6is preferable as doing so can provide more reliable grounding. This also applies to the other embodiments.

In general, it is noted that the present embodiment can have an effect similar to that described in the first embodiment. In module105, conductor incorporated resin body205has conductor pattern211cut at dispersed locations, and can thus be larger in strength than conductor incorporated resin body204.

Sixth Exemplary Embodiment

A module according to a sixth exemplary embodiment will now be described with reference toFIGS.11and12.FIG.11is a transparent plan view of a module106in the present embodiment.FIG.12is a cross section taken along a line XII-XII indicated inFIG.11.

As shown, module106has component3a,3b,3c,3d,3d1,3eand3fmounted on major surface1aof wiring substrate1. Module106comprises a conductor incorporated resin body206. Conductor incorporated resin body206is mounted on major surface1aof wiring substrate1. Conductor incorporated resin body206is disposed so as to straddle component3d1.

As shown inFIG.12, conductor incorporated resin body206has a wall-shaped structure with a notch214(e.g., an opening or cavity) in a side view. Two components3d1are accommodated in notch214. While an example with two components3d1accommodated is shown, this is merely an example and it is noted that the type, number, and size of the components are not limited to those indicated. Conductor incorporated resin body206may straddle more components. Conductor incorporated resin body206may straddle a combination of different types of components. Conductor incorporated resin body206may not have notch214only at one location, and may instead have it at two or more locations.

In general, it is noted that the present embodiment can have an effect similar to that described in the first embodiment. The present embodiment provides the conductor incorporated resin body in a structure so as to straddle a component, and thus, in plan view, allows the component to be disposed in a space occupied by the conductor incorporated resin body and can thus ensure a larger space for mounting components.

Seventh Exemplary Embodiment

A module according to a seventh exemplary embodiment will now be described with reference toFIGS.13to16.FIG.13is a transparent plan view of a module107in the present embodiment.FIG.14is a cross section taken along a line XIV-XIV indicated inFIG.13.

Module107has components3a,3b,3c,3d, and3emounted on major surface1aof wiring substrate1. Module107comprises a conductor incorporated resin body207. Conductor incorporated resin body207is mounted on major surface1aof wiring substrate1.

Conductor incorporated resin body207is disposed so as to include a portion overlapping an upper side of component3c. Conductor incorporated resin body207is in the form of a box. As shown inFIG.14, conductor incorporated resin body207has a cavity216. Component3cis accommodated in cavity216. Sealing resin6fills a surrounding of component3c.

FIG.15shows conductor incorporated resin body207alone extracted and viewed from above obliquely.FIG.16shows conductor incorporated resin body207viewed from below obliquely. A slit215serves as an entrance for sealing resin6to flow into cavity216.

The present embodiment can have an effect similar to that described in the first embodiment. The present embodiment can more reliably provide a shield for component3cdisposed in cavity216.

Eighth Exemplary Embodiment

A module according to an eighth exemplary embodiment will now be described with reference toFIG.17.FIG.17is a transparent plan view of a module108in the present embodiment.FIG.18is a cross section taken along a line XVIII-XVIII indicated inFIG.17.

Module108has components3a,3b,3c,3d, and3emounted on major surface1aof wiring substrate1. Module108comprises a conductor incorporated resin body208. Conductor incorporated resin body208is mounted on major surface1aof wiring substrate1.FIG.19shows conductor incorporated resin body208alone extracted and viewed from above obliquely.FIG.20shows conductor incorporated resin body208viewed from below obliquely.

As shown, conductor incorporated resin body208is disposed so as to include a portion overlapping an upper side of component3c. Conductor incorporated resin body208has four sides with two sides thereof each having a side surface opened. As shown inFIG.18, conductor incorporated resin body208has a notch217. Component3cis accommodated in notch217.

In general, it is noted that the present embodiment can have an effect similar to that described in the first embodiment. Module108has conductor incorporated resin body208with two side surfaces opened and thus allows sealing resin6to smoothly flow into notch217.

As a modified example of the present embodiment, a module may include a conductor incorporated resin body209as shown inFIG.21instead of conductor incorporated resin body208. Conductor incorporated resin body209has four sides each having a plate-shaped member configuring a side surface. At least one of the four sides has the plate-shaped member with an opening218provided therethrough. Opening218is provided for allowing sealing resin6to flow into cavity216. While herein one side surface is provided with only one opening218by way of example, one side surface may be provided with a plurality of openings218.

Ninth Exemplary Embodiment

A module according to a ninth exemplary embodiment will now be described with reference toFIG.22.FIG.22is a cross section of a module109in the present embodiment.

Module109has a double-sided mounting structure. That is, module109also has one or more components mounted on a surface of wiring substrate1opposite to major surface1a. In the example shown inFIG.22, components3h,3i, and3jare mounted on lower surface1b. A sealing resin6ais disposed so as to cover major surface1a, components3a,3b, and the like. A sealing resin6bis disposed so as to cover lower surface1band components3h,3i, and3j. On lower surface1b, a columnar conductor17is provided so as to penetrate through sealing resin6b. An end surface of lower surface1blocated on a side farther away from wiring substrate1is exposed from sealing resin6band serves as an external connection terminal. The end surface may further be soldered. Any or all of components3h,3i, and3jmay be exposed from sealing resin6b.

In general, it is noted that the present embodiment can have an effect similar to that described in the first embodiment. Further, the present embodiment that adopts a double-sided mounting structure allows wiring substrate1having a limited area to comprise more components. While herein the configuration of the first embodiment is modified to form a double-sided mounting structure by way of example, those of the other embodiments may be modified to form a double-sided mounting structure.

In general, it is noted that a plurality of the above embodiments may be combined as appropriate and employed. Moreover, it should be understood that the embodiments disclosed herein are illustrative and non-restrictive in any respect.

REFERENCE SIGNS LIST

1wiring substrate,1amajor surface,1blower surface,2insulating layer,3a,3b,3c,3d,3e,3f,3h,3i,3jcomponent,6,6a,6bsealing resin,8shield film,14conductor pattern,15external electrode,16conductor via,17columnar conductor,101,102,103,104,105106,107,108,109module,201,202,203,204,205,206,207,208,209conductor incorporated resin body,211,211xconductor pattern,212resin layer,213conductor via,214,217notch,215slit,216cavity,218opening,219wall-shaped portion.