The present disclosure relates to a module.
Japanese Patent Laid-Open No. 2014-203881 (PTL 1) discloses a circuit module in which a groove portion is provided in a sealing resin by laser processing and filled with an electrically conductive resin or an electrically conductive paint to thereby form an electrically conductive shield. In this case, a thick portion is provided in a wiring portion provided on a wiring board.
PTL 1: Japanese Patent Laid-Open No. 2014-203881
First, in the configuration disclosed in PTL 1, the groove portion is provided in the sealing resin by laser processing. Thus, embedded components may be damaged during laser processing. Further, the wiring board may also be damaged. In the case of laser processing, scanning with laser light is temporarily stopped at a corner portion where the groove portion is bent. Accordingly, damage to the wiring board tends to increase at this corner portion.
Further, in PTL 1, the thick portion of wires is formed on the wiring board in order to protect the wiring board. This thick portion is formed of a metal component or the like, which therefore sacrifices the area on which components can be mounted on the wiring board. Consequently, size reduction of the module is hindered.
Thus, an object of the present disclosure is to provide a module that can be reduced in size since a shield can be disposed in the vicinity of mounted components without damaging a wiring board.
In order to achieve the above-described object, a module according to the present disclosure includes: a board having a first main surface; a first component mounted on the first main surface; a first conductor column group including a plurality of conductor columns arranged on the first main surface along at least a part of an outer periphery of the first component; a first ground conductor disposed inside the board; a first conductor via group including a plurality of via conductors that connect the first ground conductor and an end of each of the conductor columns belonging to the first conductor column group, the end of each of the conductor columns being located close to the first main surface; and a shield film disposed to cover over the first component. When viewed in a cross section taken along a plane perpendicular to the first main surface, the first component is at least partially surrounded by the first conductor column group, the first conductor via group, and the first ground conductor.
The present disclosure can provide a module that can be reduced in size since the shield can be disposed in the vicinity of the mounted components without damaging the wiring board.
The dimension ratio shown in each of the figures does not always faithfully show the actual dimension ratio, but may show the dimension ratio in an exaggerated manner for the sake of explanation. In the following description, mentioning the concept “upper” or “lower” does not necessarily indicate an absolute upper or lower position, but may indicate a relatively upper or lower position in the posture shown in each figure.
A module in the first embodiment according to the present disclosure will be hereinafter described with reference to
Module 101 in the present embodiment includes: a board 1 having a first main surface 1a; a first component 41 mounted on first main surface 1a; a conductor wall-like member 9 disposed on first main surface 1a along at least a part of an outer periphery of first component 41; a first ground conductor 21 disposed inside board 1; a first conductor via group 81 including a plurality of via conductors that connect first ground conductor 21 and an end of conductor wall-like member 9, the end of conductor wall-like member 9 being located close to first main surface 1a; and a shield film 8 disposed to cover over first component 41. When viewed in a cross section taken along a plane perpendicular to first main surface 1a, first component 41 is at least partially surrounded by conductor wall-like member 9, first conductor via group 81, and first ground conductor 21. In other words, first component 41 is shielded by conductor wall-like member 9, first conductor via group 81, and first ground conductor 21 that are electrically connected to be contiguous to each other. In the example shown in this case, conductor wall-like member 9 is not in contact with shield film 8.
As a conductor wall-like member, for example, a copper block or a metal plate is applicable. When board 1 is a ceramic board, a protruding electrode may also be used as a conductor wall-like member.
In the example shown in this case, as shown in
As shown in
In the present embodiment, the module can be reduced in size since the shield can be disposed in the vicinity of the mounted components without damaging the wiring board. In particular, as shown in
As described in the present embodiment, conductor wall-like member 9 is preferably a frame-shaped member surrounding the outer periphery of first component 41 when viewed in a direction perpendicular to first main surface 1a. By adopting this configuration, the shield can be reinforced over the entire periphery.
(Modifications)
In the example shown in
In the present modification, first ground conductor 21 and ground conductor 26 are located close to each other with a gap 20 interposed therebetween. Thus, at the height at which first ground conductor 21 is disposed, any one of the ground conductors is disposed in most of the region. Thereby, the shielding performance can be enhanced.
In the example illustrated in the present embodiment, as shown in
A module in the second embodiment according to the present disclosure will be hereinafter described with reference to
Board 1 has a second main surface 1b opposite to a first main surface 1a. In module 102, a second component 45 is mounted on second main surface 1b. Second sealing resin 6b is disposed so as to cover second main surface 1b. The lower surface of second component 45 is exposed from second sealing resin 6b. A conductor column 12 is disposed on second main surface 1b. Conductor column 12 is used as an external electrode of module 102. The lower end of conductor column 12 is exposed from second sealing resin 6b.
In the present embodiment, second main surface 1b of board 1 is also used as a surface on which components are mounted, so that more components can be mounted in a limited area.
A module in the third embodiment according to the present disclosure will be hereinafter described with reference to
Module 103 in the present embodiment includes: a board 1 having a first main surface 1a: a first component 41 mounted on first main surface 1a; a first conductor column group including a plurality of conductor columns 5 arranged on first main surface 1a along at least a part of an outer periphery of first component 41; a first ground conductor 21 disposed inside board 1; a first conductor via group 81 including a plurality of via conductors that connect first ground conductor 21 and an end of each of conductor columns 5 belonging to the first conductor column group, the end of each of conductor columns 5 being located close to first main surface 1a; and a shield film 8 disposed to cover over first component 41. First component 41 is at least partially surrounded by the first conductor column group, first conductor via group 81, and first ground conductor 21. In other words, first component 41 is shielded by the first conductor column group, first conductor via group 81, and first ground conductor 21 that are electrically connected to be contiguous to each other.
First ground conductor 21 is independent of other ground conductors disposed inside board 1. When viewed in a direction perpendicular to first main surface 1a, the first conductor column group surrounds first component 41. In this case, each conductor column 5 belonging to the first conductor column group is not connected to shield film 8. As conductor column 5, a metal pin, a metal block, a protruding electrode, plating, a part of a wire, or the like can be used. First component 41 and the first conductor column group are sealed by a first sealing resin 6a.
In the present embodiment, the module can be reduced in size since the shield can be disposed in the vicinity of the mounted components without damaging the wiring board. In particular, as shown in
In the example illustrated in the present embodiment, the upper end of conductor column 5 is not in contact with shield film 8 but may be in contact with shield film 8.
A module in the fourth embodiment according to the present disclosure will be hereinafter described with reference to
In the present embodiment, the plurality of conductor columns 5 belonging to the first conductor column group are arranged in a non-uniform manner to have a section in which conductor columns 5 are sparsely arranged and a section in which conductor columns 5 are densely arranged. Thus, a desired portion of first component 41 can be shielded in a focused manner.
A module in the fifth embodiment according to the present disclosure will be hereinafter described with reference to
In the present embodiment, the first conductor column group includes a conductor column 5a and a conductor column 5b. Conductor column 5b is larger in area of a cross section taken in parallel to first main surface 1a than conductor column 5a. In other words, conductor column 5b is thicker than conductor column 5a. Conductor column 5b is higher than conductor column 5a. The conductor columns belonging to the first conductor column group may include only two types of conductor columns 5a and 5b but may include more types of conductor columns. In other words, in the first conductor column group, the conductor columns may vary in thickness and height in multiple stages. Other configurations are the same as those of module 103 described in the third embodiment.
In the present embodiment, the first conductor column group includes conductor columns having different heights. In the present embodiment, the first conductor column group includes conductor columns having different thicknesses.
In the present embodiment, the plurality of conductor columns belonging to the first conductor column group are different in thickness and height. Thus, a desired portion of first component 41 can be shielded in a focused manner.
In the configuration of the example shown in
As shown in the present embodiment, it is preferable that board 1 has a second main surface 1b opposite to first main surface 1a, and a second component 45 is mounted on second main surface 1b. It is preferable that first ground conductor 21 has an opening, a signal line is connected to first component 41, and the signal line passes through the opening.
A module in the sixth embodiment according to the present disclosure will be hereinafter described with reference to
In the present embodiment, the first conductor column group includes a plurality of conductor columns 5. In a plan view, the first conductor column group surrounds a first component 41, a component 43, and a number of chip components 49 (which will be hereinafter collectively referred to as a “target component group”) in a collective manner. Note that the first conductor column group does not completely annularly surround the target component group, but partially surrounds the target component group. In other words, the first conductor column group surrounds the target component group from three sides of left, upper, and right sides in
On the right side in
Also in the present embodiment, the same effect as that in the first embodiment can be achieved. As in the present embodiment, the first conductor column group surrounds not only first component 41 but also other components, and thereby, a plurality of components can be collectively shielded. As illustrated in the present embodiment, a desired component can also be shielded by combining the first conductor column group and shield film 8 without requiring complete surrounding only with the first conductor column group.
A module in the seventh embodiment according to the present disclosure will be hereinafter described with reference to
Also in the present embodiment, the same effect as that in the first embodiment can be achieved. In the example shown in this case, first ground conductor 21 is configured of a combination of two conductors disposed at different heights, which is however shown merely by way of example. First ground conductor 21 may be a combination of three or more conductors.
In the description of the example in the present embodiment, conductor wall-like member 9 is disposed on first main surface 1a as in the first embodiment, but the first conductor column group including a plurality of conductor columns 5 may be disposed in place of conductor wall-like member 9 on first main surface 1a.
A module in the eighth embodiment according to the present disclosure will be hereinafter described with reference to
A power amplifier and the like each are mounted as a transmission device while a low noise amplifier and the like each are mounted as a reception device. An antenna switch and the like each are mounted as a common device.
Module 108 includes a conductor wall-like member 9 disposed to surround each of components 41a, 41b, and 41c as first components. In a plan view of module 108, conductor wall-like member 9 is arranged in a frame shape. In surrounding component 41a as the first component, conductor wall-like member 9 is disposed to collectively surround not only component 41a but also matching circuit 40a mounted in the vicinity of component 41a. In surrounding component 41b as the first component, conductor wall-like member 9 is disposed to collectively surround not only component 41b but also matching circuit 40b mounted in the vicinity of component 41b. In surrounding component 41c as the first component, conductor wall-like member 9 is disposed to collectively surround not only component 41c but also matching circuit 40c mounted in the vicinity of component 41c.
The isolation between devices deteriorates particularly due to magnetic flux coupling that is caused by an inductor as a matching circuit. Therefore, it is effective to surround the matching circuit with a shield in order to prevent deterioration of isolation. In the present embodiment, the devices and the matching circuits associated with the respective devices are collectively surrounded by a shield formed of conductor wall-like member 9, so that deterioration of isolation can be prevented.
In the example shown in this case, the transmission device, the reception device, and the common device are divided into three groups that are surrounded for each group by respective shields each including conductor wall-like member 9, but only some of these three groups of the transmission device, the reception device, and the common device may be surrounded by their respective shields each including conductor wall-like member 9.
Among the above-described embodiments, one or more of the embodiments may be employed in an appropriate combination.
The above embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present disclosure is defined by the terms of the claims, and is intended to include any modifications within the meaning and scope equivalent to the terms of the claims.
1 board, 1a first main surface, 1b second main surface, 2 insulating layer, 5 conductor column, 6a first sealing resin, 6b second sealing resin, 8 shield film, 9 conductor wall-like member, 13, 14, 15 conductor via, 20 gap, 21 first ground conductor, 21a, 21b conductor, 40a, 40b, 40c matching circuit, 41, 41a, 41b, 41c first component, 43 component, 45 second component, 49 chip component, 81 first conductor via group, 101, 102, 103, 104, 105, 106, 107, 108, 109 module.
Number | Date | Country | Kind |
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2019-142317 | Aug 2019 | JP | national |
2020-122281 | Jul 2020 | JP | national |
This is a continuation of International Application No. PCT/JP2020/028654 filed on Jul. 27, 2020 which claims priority from Japanese Patent Application No. 2019-142317 filed on Aug. 1, 2019 and Japanese Patent Application No. 2020-122281 filed on Jul. 16, 2020. The contents of these applications are incorporated herein by reference in their entireties.
Number | Name | Date | Kind |
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20040211590 | Tagi | Oct 2004 | A1 |
20140293550 | Mugiya et al. | Oct 2014 | A1 |
20180092257 | Otsubo et al. | Mar 2018 | A1 |
20180374798 | Lee et al. | Dec 2018 | A1 |
20190393166 | Otsubo | Dec 2019 | A1 |
Number | Date | Country |
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2014-203881 | Oct 2014 | JP |
2016181954 | Nov 2016 | WO |
2018164158 | Sep 2018 | WO |
Entry |
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International Search Report for PCT/JP2020/028654 dated Oct. 27, 2020. |
Written Opinion for PCT/JP2020/028654 dated Oct. 27, 2020. |
Number | Date | Country | |
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20220159825 A1 | May 2022 | US |
Number | Date | Country | |
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Parent | PCT/JP2020/028654 | Jul 2020 | WO |
Child | 17649401 | US |