JP2010141694A - Electronic apparatus, printed circuit board, and radio module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic apparatus which comprises a radio module whose mounted space is reduced. <P>SOLUTION: An electronic apparatus comprises a case 21 and a printed circuit board 22 accommodated inside the case 21. The printed circuit board 22 includes a printed wiring board 26 comprising an opening 34 and a radio module 27 mounted on the printed wiring board 26 oppositely to the opening 34. The radio module 27 includes a component substrate 43 which has one surface 43B opposed to the opening 34 and another surface 43A on an opposite side to the one surface 43B and in which a chip 44 is mounted on the other surface 43A; a terminal part 45 in which a plurality of terminals 45A connected to the printed wiring board 26 are disposed, and an antenna 46 which is provided at a position out of the terminal part 45 on the one surface 43B of the component substrate 43 and exchanges radio waves with the outside by driving the chip 44. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic device, a printed circuit board, and a wireless module having a wireless module in which an antenna is built.

  For example, an electronic device in which an antenna element is arranged inside an antenna buried groove of a motherboard is disclosed. This electronic device is formed on a mother board, an antenna buried groove provided on the mother board, an antenna mounting substrate arranged inside the antenna buried groove, an antenna element arranged on the antenna mounting substrate, and an upper surface of the antenna element. And a power feed pin for connecting the antenna mounting substrate and the antenna electrode. The antenna element is formed in a box shape from dielectric ceramics (see, for example, Patent Document 1). This Patent Document 1 does not disclose a driving circuit component for driving wireless communication in an antenna element.

In this electronic device, an antenna buried space is formed inside the antenna buried groove, and a box-type antenna element is arranged inside the antenna buried space. For this reason, since the antenna element is mounted so as to be buried in the motherboard, the mounting height when the antenna element is mounted is reduced.
JP 2002-217621 A

  By the way, in the conventional electronic device, in order to mount the circuit components for driving, it is necessary to secure a mounting space on the motherboard or on a substrate independent of the motherboard. On the other hand, in recent years, notebook personal computers, mobile phones, and the like have been promoted to reduce the thickness and size of devices, and there has been a strong demand for downsizing the antenna unit itself. However, since the conventional antenna mounting structure requires a large mounting space, it cannot be applied as it is to recent small electronic devices, and there is room for improvement.

  The objective of this invention is obtaining the electronic device provided with the radio | wireless module which made mounting space small.

  In order to achieve the above object, an electronic device according to an aspect of the present invention is an electronic device including a housing and a printed circuit board housed in the housing, wherein the printed circuit board is A printed wiring board having an opening, and a wireless module mounted on the printed wiring board so as to face the opening, and the wireless module has one surface facing the opening. A component board having the other side opposite to the one side, and a chip mounted on the other side, and provided on one side of the component board and connected to the printed wiring board. A terminal portion on which a plurality of terminals are arranged, and an antenna that is provided on one surface of the component substrate at a position away from the terminal portion and that transmits and receives radio waves to and from the outside by driving the chip. ,including.

  In order to achieve the above object, a printed circuit board according to one aspect of the present invention includes a printed wiring board having an opening, a wireless module mounted on the printed wiring board facing the opening, The wireless module has one surface facing the opening and the other surface opposite to the one surface, and the chip is mounted on the other surface. The mounted component board, provided on one surface of the component board, and a terminal portion on which a plurality of terminals connected to the printed wiring board are disposed, and on one surface of the component board, from the terminal portion And an antenna that transmits and receives radio waves to and from the outside by driving the chip.

  In order to achieve the above object, a wireless module according to one aspect of the present invention has one surface and the other surface opposite to the one surface, and a chip is mounted on the other surface. The component board, provided on one surface of the component board, a terminal portion on which a plurality of terminals are disposed, and provided on a position on the one surface of the component substrate at a position away from the terminal portion, and the chip And an antenna for transmitting and receiving radio waves to and from the outside under the control.

  According to the said structure, the electronic device provided with the wireless module which made the mounting space small can be obtained.

  Hereinafter, an embodiment of an electronic device will be described with reference to FIGS. 1 to 4. In this embodiment, a case where the present invention is applied to a portable computer which is a so-called notebook personal computer will be described as an example of an electronic device.

  As shown in FIG. 1, the portable computer 11 includes a main body unit 12, a display unit 13, and a hinge portion 14 provided between the main body unit 12 and the display unit 13. The hinge portion 14 supports the display unit 13 so as to be rotatable. The hinge portion 14 supports the display unit 13 so that it can be rotated between a closed state with respect to the main unit 12 and an open state with respect to the main unit 12.

  As shown in FIG. 1, the display unit 13 includes a display cabinet 15 and a liquid crystal display 16 that is an example of a display housed in the display cabinet 15.

  As shown in FIGS. 1 to 3, the main unit 12 includes a housing 21, a printed circuit board 22 accommodated in the housing 21, a keyboard 23 attached to the housing 21, a touch pad 24, and buttons. 25. The printed circuit board 22 includes a printed wiring board 26 on which a plurality of circuit components such as a CPU are mounted, a wireless module 27 mounted on the printed wiring board 26, a heat dissipation unit 28 for cooling the wireless module 27, and heat dissipation. A stud 29 and a screw 30 for fixing the portion 28 to the printed wiring board 26, and a heat conductive sheet 31 interposed at a position between the wireless module 27 and the heat radiating portion 28 are provided. The printed wiring board 26 has a rectangular opening 34 and an edge 35 that defines the periphery of the opening 34.

  The stud 29 has a cylindrical shape, for example, and has an insertion portion 36 at one end. The insertion part 36 is fitted tightly inside the fixing hole 32 of the printed wiring board 26, and the stud 29 is fixed to the printed wiring board 26 via the insertion part 36. The heat conductive sheet 31 is made of, for example, a silicon rubber sheet, and has heat conductivity and elasticity. But what is interposed in the position between the radio | wireless module 27 and the thermal radiation part 28 is not limited to the heat conductive sheet 31, The grease with heat conductivity may be sufficient.

  The heat radiating portion 28 is provided at a position on the opposite side of the printed wiring board 26 with the wireless module 27 interposed therebetween. The heat dissipating unit 28 includes a heat dissipating plate 41 that is in contact with the wireless module 27 via the heat conductive sheet 31, a heat pipe 42 that conveys heat from the heat dissipating plate 41 to the vicinity of the fan unit, and heat from the heat pipe 42 And a fan unit (not shown) that discharges outside the body 21. The heat pipe 42 is formed by enclosing a working fluid inside a cylindrical copper pipe.

  The wireless module 27 has, for example, a BGA type package form, and corresponds to a wireless HD communication standard, for example. For example, the wireless module 27 can transmit and receive video-related and music-related signals (information) at high speed. The wireless module 27 is disposed at a position facing the opening 34 of the printed wiring board 26, that is, a position overlapping the opening 34. More specifically, the wireless module 27 is disposed at a position inside the edge portion 35 of the printed wiring board 26.

  The wireless module 27 is provided on a rectangular plate-shaped component substrate 43, a chip 44 mounted on the other surface 43A opposite to one surface 43B of the component substrate 43, and one surface 43B of the component substrate 43. A terminal portion 45 and an antenna 46 provided at a position away from the terminal portion 45 on one surface 43B of the component substrate 43 are provided. The wireless module 27 is not limited to a wireless HD compatible, and may be compatible with other communication standards such as WiMAX.

  The chip 44 is embedded in an insulating synthetic resin surrounding the periphery. The terminal portion 45 has a plurality of terminals 45 </ b> A that form connection portions with the printed wiring board 26. The terminal portion 45 has a frame shape and serves as a power feeding portion for feeding power from the printed wiring board 26 to the chip 44. An antenna 46 is disposed inside the frame-shaped terminal portion 45. Each of the plurality of terminals 45A is composed of a solder ball. As shown in FIG. 4, the antenna 46 can transmit and receive radio waves with an external device under the control of the chip 44. The antenna 46 includes, for example, a bent linear antenna element 46A and an antenna ground 46B that is a rectangular conductor pattern.

  The antenna 46 is formed by a flat conductor pattern formed by printing, for example, copper paste on the component substrate 43. As shown in FIG. 3, the heat radiating plate 41 is fixed so as to be pressed in the direction of the printed wiring board 26 via the stud 29 and the screw 30. The heat radiating plate 41 is in contact with the chip 44 of the wireless module 27, and the wireless module 27 is biased in a direction approaching the printed wiring board 26 via the heat radiating plate 41. In the present embodiment, a flat plate is disposed as the heat radiating plate 41, but is not limited thereto, and a leaf spring may be provided as the heat radiating plate 41.

  According to the first embodiment, the portable computer 11 includes a housing 21 and a printed circuit board 22 accommodated in the housing 21, and the printed circuit board 22 has an opening 34. The printed circuit board 26 and the wireless module 27 mounted on the printed circuit board 26 so as to face the opening 34, and the wireless module 27 has one surface 43 </ b> B facing the opening 34, and this one The component substrate 43 having the other surface 43A opposite to the surface 43B, the component substrate 43 having the chip 44 mounted on the other surface 43A, and the one surface 43B of the component substrate 43, and the printed wiring board 26 Are provided at a position deviated from the terminal portion 45 on one surface 43B of the component substrate 43 and a plurality of terminals 45A to be connected to the outside. Including an antenna 46 for transmitting and receiving radio waves between.

  According to this configuration, since the antenna 46 is built on the wireless module 27 that drives the wireless communication, the space required for installation is reduced compared to the case where the antenna 46 and the wireless module 27 are formed separately. can do. Thereby, the portable computer 11 can be reduced in size and thickness. Further, since the wireless module 27 is disposed so as to face the opening 34, even if the antenna 46 is provided on the same surface as the surface on which the terminal portion 45 is provided, radio waves transmitted and received from the antenna 46 are transmitted by the printed wiring board 26. It can be prevented from being blocked.

  The printed wiring board 26 has an edge 35 that defines the periphery of the opening 34, and the antenna 46 is provided at a position inside the edge 35. According to this configuration, since the printed wiring board 26 is not disposed so as to cover the antenna 46, the risk of hindering the wireless communication of the antenna 46 can be further effectively eliminated. .

  The terminal portion 45 has a frame shape surrounding the antenna 46. For this reason, the solder connection part between the radio | wireless module 27 and the printed wiring board 26 can be formed firmly. Thereby, even if the antenna 46 is provided on the same surface as the surface on which the terminal portion 45 is provided, it is possible to prevent the connection strength of the solder connection portion from being lowered.

  At this time, the portable computer 11 is provided at a position on the opposite side of the printed wiring board 26 with the wireless module 27 interposed therebetween, and is brought into contact with the chip 44 and releases heat of the chip 44 to the outside. Part 28. According to this configuration, the wireless module 27 is urged by the heat radiating portion 28 in a direction in which the wireless module 27 is pressed against the printed wiring board 26. For this reason, in the connection part between the wireless module 27 and the printed wiring board 26, a load is not applied in the direction in which the solder is peeled off, and the connection reliability between the wireless module 27 and the printed wiring board 26 is improved. Can do. In addition, the wireless module 27 can be smoothly cooled against heat generated by the wireless module 27 corresponding to high-speed transmission, and problems of the wireless module 27 due to heat generation can be prevented.

  Next, a second embodiment of the portable computer will be described with reference to FIGS. The portable computer 11, which is an example of the electronic device of the second embodiment, differs from the first embodiment in that a reinforcing plate 51 is provided on the printed circuit board 22, but the other parts are the first. Common to the embodiment. For this reason, a different part from 1st Embodiment is mainly demonstrated, a common code | symbol is attached | subjected about a common location, and description is abbreviate | omitted.

  The portable computer 11 of the second embodiment has the same appearance as that shown in FIG. The printed circuit board 22 according to the second embodiment includes a printed wiring board 26, a wireless module 27 mounted on the printed wiring board 26, a heat radiating portion 28 for cooling the wireless module 27, and a heat radiating portion 28. A stud 29 and a screw 30 for fixing to the wiring board 26, a heat conductive sheet 31 interposed between the wireless module 27 and the heat radiating portion 28, a reinforcing plate 51 in close contact with the printed wiring board 26, have. The printed wiring board 26 has a rectangular opening 34 and an edge 35 that defines the periphery of the opening 34.

  The reinforcing plate 51 is mounted on the second surface 26B opposite to the first surface 26A of the printed wiring board 26 on which the wireless module 27 is mounted. The reinforcing plate 51 has a frame-shaped frame portion 52 and a rectangular through hole 53 provided inside the frame portion 52. The through hole 53 is formed to be larger than the opening 34 formed in the printed wiring board 26, and prevents the radio wave transmitted and received by the antenna 46 by the reinforcing plate 51 as much as possible. The reinforcing plate 51 is made of, for example, stainless steel. The reinforcing plate 51 has a screw hole 55 through which a screw portion 54 provided at one end of the stud 29 is passed. The reinforcing plate 51 is fixed so as to be in close contact with the printed wiring board 26 via the screw portion 54 and the screw hole 55.

  According to the second embodiment, the portable computer 11 is mounted on the surface opposite to the surface on which the wireless module 27 is mounted on the printed wiring board 26 and has a through hole at a position corresponding to the opening 34. A reinforcing plate 51 having 53 is provided. According to this configuration, even if the structure in which the heat radiating portion 28 is pressed against the wireless module 27 is employed, the printed wiring board 26 can be prevented from being bent because the reinforcing plate 51 is provided. For this reason, even if strength reduction occurs in the printed wiring board 26 due to the provision of the opening 34, the printed wiring board 26 can be prevented from being bent. Moreover, since the through-hole 53 is provided in the reinforcement board 51, even if the reinforcement board 51 is arrange | positioned, it can prevent that the wireless communication of the antenna 46 is inhibited. Further, the reinforcing plate 51 can also be used as a fixing portion for stably fixing the heat radiating portion 28 and the stud 29.

  In the first and second embodiments, the opening 34 is disposed near the center of the printed wiring board 26, but the position of the opening 34 is not limited to the above example. The opening 34 may be formed as a “U” -shaped cutout formed along the outer periphery of the printed wiring board 26. In each of the above embodiments, the wireless module 27 is cooled via the heat pipe 42. However, the present invention is not limited to this cooling mode. For example, the radiator plate 41 is a sword mountain heat sink, and the heat sink In this case, heat may be radiated at that position.

  The electronic device of the present invention is not limited to the above embodiment. The electronic device of the present invention can be applied not only to a portable computer but also to a display device such as a mobile phone and a television, a router for connecting a plurality of devices, and the like. In addition, the electronic device of the present invention can be variously modified without departing from the gist of the invention.

1 is a perspective view showing a portable computer according to a first embodiment. FIG. 2 is an exemplary plan view showing a printed circuit board housed in a casing of the portable computer shown in FIG. 1. Sectional drawing along the F3-F3 line of the printed circuit board shown in FIG. The top view which looked at the radio | wireless module of the printed circuit board shown in FIG. 3 from one surface. The top view which shows the printed circuit board of the portable computer concerning 2nd Embodiment. FIG. 6 is a cross-sectional view taken along line F6-F6 of the printed circuit board shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Portable computer, 21 ... Housing, 22 ... Printed circuit board, 26 ... Printed wiring board, 27 ... Wireless module, 43 ... Component board, 43A ... The other side, 43B ... One side, 44 ... Chip, 45 ... Terminal part, 46 ... antenna, 51 ... reinforcing plate, 53 ... through hole

Claims (12)

A housing,
A printed circuit board housed inside the housing;
An electronic device comprising:
The printed circuit board is:
A printed wiring board having an opening;
A wireless module mounted on the printed wiring board facing the opening,
Have
The wireless module is
A component substrate having one surface facing the opening and the other surface opposite to the one surface, and a chip mounted on the other surface;
Provided on one surface of the component substrate, and a terminal portion in which a plurality of terminals connected to the printed wiring board are arranged,
On one surface of the component substrate, an antenna that is provided at a position deviated from the terminal portion, and that transmits and receives radio waves with the outside by control of the chip,
An electronic device comprising: The printed wiring board has an edge that defines the periphery of the opening,
The electronic apparatus according to claim 1, wherein the antenna is provided at a position inside the edge.   The electronic device according to claim 2, wherein the terminal portion has a frame shape surrounding the periphery of the antenna.   It is provided at a position opposite to the printed wiring board with the wireless module interposed therebetween, and is provided with a heat radiating portion that comes into contact with the chip and discharges the heat of the chip to the outside. The electronic device according to claim 3.   The printed circuit board is mounted on a surface opposite to the surface on which the wireless module is mounted, and includes a reinforcing plate having a through hole at a position corresponding to the opening. 4. The electronic device according to 4. A printed wiring board having an opening;
A wireless module mounted on the printed wiring board facing the opening,
A printed circuit board comprising:
The wireless module is
A component substrate having one surface facing the opening and the other surface opposite to the one surface, and a chip mounted on the other surface;
A terminal part provided on one surface of the component board and arranged with a plurality of terminals connected to the printed wiring board;
On one surface of the component substrate, an antenna that is provided at a position deviated from the terminal portion, and that transmits and receives radio waves with the outside by control of the chip,
A printed circuit board comprising: The printed wiring board has an edge that defines the periphery of the opening,
The printed circuit board according to claim 6, wherein the antenna is provided at a position inside the edge.   The printed circuit board according to claim 7, wherein the terminal portion has a frame shape surrounding the periphery of the antenna.   It is provided at a position opposite to the printed wiring board with the wireless module interposed therebetween, and is provided with a heat radiating portion that comes into contact with the chip and discharges the heat of the chip to the outside. The printed circuit board according to claim 8.   The printed circuit board is mounted on a surface opposite to the surface on which the wireless module is mounted, and includes a reinforcing plate having a through hole at a position corresponding to the opening. 9. A printed circuit board according to 9. A component board having one surface and the other surface opposite to the one surface, and a chip mounted on the other surface;
A terminal portion provided on one surface of the component substrate and having a plurality of terminals disposed thereon;
On one surface of the component substrate, an antenna that is provided at a position deviated from the terminal portion, and that transmits and receives radio waves with the outside by control of the chip,
A wireless module comprising:   The wireless module according to claim 11, wherein the terminal portion has a frame shape surrounding the periphery of the antenna.

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