WO2008026257A1 - Electronic device and method for manufacturing shielding material for same - Google Patents
Electronic device and method for manufacturing shielding material for same Download PDFInfo
- Publication number
- WO2008026257A1 WO2008026257A1 PCT/JP2006/316994 JP2006316994W WO2008026257A1 WO 2008026257 A1 WO2008026257 A1 WO 2008026257A1 JP 2006316994 W JP2006316994 W JP 2006316994W WO 2008026257 A1 WO2008026257 A1 WO 2008026257A1
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- WO
- WIPO (PCT)
- Prior art keywords
- shielding material
- electronic device
- electronic
- electronic component
- shielding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0045—Casings being rigid plastic containers having a coating of shielding material
Definitions
- This application relates to an electronic device in which a printed wiring board is provided with a shield material against electromagnetic waves in various consumer electronic devices such as notebook computers, mobile phones, digital cameras, car navigation systems, and the like that are required to be miniaturized.
- the present invention relates to the technical field of equipment and its shield material manufacturing method.
- Patent Document 1 As a printed wiring board provided with such an electromagnetic wave shielding layer, there is an invention disclosed in Patent Document 1, for example.
- the present invention prevents electromagnetic interference and the like by vacuum packaging a printed wiring board with a bag-like body made of a laminated film having an electromagnetic wave shielding layer.
- Patent Document 1 Japanese Patent Laid-Open No. 5-170272
- the invention disclosed in Patent Document 1 described above is a packaging form that covers the entire printed circuit board, that is, for packaging both sides of the printed circuit board at the same time V. There is a problem that it is not possible to shield only a desired part on one side of a printed wiring board. In other words, the invention disclosed in Patent Document 1 has a problem in that unnecessary portions other than the portion to be shielded against electromagnetic waves are also shielded against electromagnetic waves.
- Patent Document 1 a laminated film having an electromagnetic wave shielding layer is provided.
- a bag-like body having a size corresponding to the size of the printed wiring board must be used.
- the present application has been made in consideration of the above circumstances, and one example of the problem is to shield a desired portion of the mounted electronic component on one side of the printed wiring board by electromagnetic waves. It is an object of the present invention to provide an electronic device and a method for manufacturing a shielding material thereof.
- the electronic device is an electronic device in which an electronic component is mounted on a printed wiring board, and an object to perform electromagnetic shielding on one side of the printed wiring board.
- the electronic component arranged in the region is covered with a shield material so as to be in close contact with the electronic component.
- a method for manufacturing a shielding material for an electronic device includes: mounting an electronic component on a printed wiring board; and shielding the electronic component with an electromagnetic wave.
- a manufacturing method comprising: a shielding material coating step for covering the electronic component disposed in a target region where electromagnetic shielding is performed on one side of the printed wiring board; and a shielding material coating step for covering the electronic component by the shielding material coating step. And an air exhausting process for exhausting air from the coated shield material.
- FIG. 1 is a perspective view showing a printed wiring board for electromagnetic wave shielding in a first embodiment of the present application.
- FIG. 2 is a plan view showing a through hole, an adhesive line region, and a conductive line region provided in the printed wiring board of FIG. 1.
- FIG. 3 is a cross-sectional view showing a state in which the printed wiring board of FIG. 2 is covered with an insulating material.
- FIG. 4 is a cross-sectional view showing a state where the printed wiring board of FIG. 3 is covered with a shielding material.
- FIG. 5 is a cross-sectional view showing a state where an insulating material and a shield material are in close contact with the printed wiring board of FIG. 4 by air discharge.
- FIG. 6 is a cross-sectional view showing a state in which the outer peripheral portion of the shield material fixed to the printed wiring board shown in FIG. 5 is cut.
- FIG. 7 is a schematic view showing a state in which two general printed wiring boards face each other.
- FIG. 8 is a schematic perspective view showing the height relationship of components in a state where two general printed wiring boards face each other.
- FIG. 9 is a view of the force in the direction of arrow A in FIG.
- FIG. 9B is a view as seen from the direction of arrow B in FIG.
- FIG. 9 shows the two printed wiring boards in Fig. 9A covered with a general box-type shield.
- FIG. 10B is a diagram showing a state in which the two printed wiring boards in FIG. 9B are covered with a general box-type shield.
- FIG. 11A is a diagram showing a state where the shield of this embodiment is covered on the two printed wiring boards of FIG. 9A.
- FIG. 11B is a diagram showing a state where the shield of this embodiment is covered on the two printed wiring boards of FIG. 9B.
- FIG. 12 is a cross-sectional view showing a state where an insulating material and a shielding material are covered on a printed wiring board in a second embodiment of the present application.
- FIG. 13 is a cross-sectional view showing a state where heat dissipation measures are taken in the third embodiment of the present application.
- FIG. 14 is a cross-sectional view showing the operation in a state where the heat dissipation measure of FIG. 13 is taken.
- FIG. 15 is a plan view showing an adhesive line region and a conductive line region provided on a printed wiring board according to a fourth embodiment of the present application.
- FIG. 1 is a perspective view showing a printed wiring board that shields electromagnetic waves according to the first embodiment of the present application
- FIG. 2 is a plan view showing through holes, an adhesive line area, and a conductive line area provided in the printed wiring board of FIG. FIG.
- the steps shown in FIGS. 1 and 2 are pretreatment steps for the printed wiring board in the shield material manufacturing method.
- a surface la which is a surface to be shielded against electromagnetic waves in a printed wiring board (hereinafter simply referred to as a board)
- IC2 as an electronic component
- chip component 3 and Connector 4 is mounted on a surface la.
- This board 1 has four through holes 5 with a diameter of about 1.25 mm that penetrate from the front surface la to the rear surface lb at positions avoiding the IC 2, the chip component 3, and the connector 4. Use as a hole for air discharge .
- the substrate 1 to be subjected to electromagnetic wave shielding is manufactured in such a manner that the solder does not enter the through hole 5 when performing soldering by a reflow furnace.
- the region to be shielded against electromagnetic waves on the substrate 1 includes an adhesive line region 6 of an lmm-width insulating material previously formed in a rectangular shape on the outer periphery of the region.
- a conductive line region 7 of a lmm-width shield material similarly formed in a rectangular shape is provided on the outside, and these bonding line region 6 and conductive line region 7 include IC2, chip component 3 and connector 4 Design the electronic parts so that they do not overlap.
- a pattern is not formed on the surface of the substrate 1 in the bonding line region 6.
- a copper foil pattern is formed on the surface of the substrate 1, and finally electrically connected to a shield material described later. Therefore, it is desirable that the conductive line region 7 be a ground pattern having the same potential as the GND pattern.
- FIG. 3 is a cross-sectional view showing a state in which the printed wiring board of FIG. 2 is covered with an insulating material
- FIG. 4 is a cross-sectional view showing a state in which the printed wiring board of FIG. 3 is covered with a shielding material
- FIG. FIG. 6 is a cross-sectional view showing a state in which the outer peripheral portion of the shield material fixed to the printed wiring board shown in FIG. 5 is cut. It is.
- a general-purpose adhesive 9 such as a UV (ultraviolet ray) curable adhesive is uniformly applied to the adhesive line region 6 of the insulating material 8.
- a general-purpose adhesive 9 such as a UV (ultraviolet ray) curable adhesive is uniformly applied to the adhesive line region 6 of the insulating material 8.
- a polyethylene sheet having a thickness of 10 to 30 / zm or the like is used as the insulating material 8.
- the insulating material 8 is provided so as to cover the electronic parts such as the IC 2 and the chip part 3 mounted on the surface 1 a of the shielded area 1 of the substrate 1, and the bonding line area of the insulating material 8 as shown in FIG.
- the insulating material 8 is bonded to the substrate 1 by pressing the insulating material 8 to the bonding line region 6 with a pressure welding jig 10 capable of pressure welding the entire circumference of 6.
- the electronic components such as the IC 2 and the chip component 3 mounted on the surface 1 a of the shield target region are covered with the insulating material 8.
- the insulating material 8 is formed with about four small-diameter air discharge holes 8a in predetermined portions such as the upper surface of the electronic component in the target region where electromagnetic wave shielding is performed.
- problems such as damage to the insulating material 8 occur if the insulating material 8 is not wide enough. Therefore, before bonding the insulating material 8 with the pressure welding jig 10, it is desirable that the insulating material 8 that allows the insulating material 8 to enter between the electronic component and the electronic component has a sufficient margin. .
- the insulating material 8 is cut between the bonding wire region 6 and the conductive wire region 7 in a manner of cutting the outer periphery with a cutting jig 11 such as a cutter.
- an aluminum foil of about 20 to 50 â m or a sheet-like metal foil having the same degree of flexibility is prepared as the shielding material 12.
- This shielding material 12 covers the electronic parts such as IC2 and chip part 3 mounted on the surface la in the same manner as the insulating material 8 from the upper side (surface la side) of the target area where the insulating material 8 has been bonded. 4 and a portion near the bonding line region 6 of the insulating material 8 is pressed by the pressure welding jig 13 having a roller 13a attached to the tip as shown in FIG.
- the rear surface lb side force of the substrate 1 is pressed against the substrate 1 with the air discharge nozzle 14 formed in an opening area including all the through holes 5 formed in the target region.
- This air discharge nozzle 14 is provided with a rubber cushion material 14a at the contact portion with the substrate 1, and the cushion material 14a prevents air leakage. Further, the air discharge nozzle 14 is connected to the vacuum pump 15 via V, a pipe line (not shown).
- the air discharge nozzle 14 when the air discharge nozzle 14 is brought into contact with the back surface lb side of the substrate 1, the pressure welding jig 13 of the shield material 12 is formed on the back surface lb side of the substrate 1 from the back surface side. From the lb side, the air discharge nozzle 14 also presses the substrate 1 with symmetrical positional force, and the substrate 1 can be effectively fixed.
- the vacuum pump 15 Since the vacuum pump 15 is connected to the air discharge nozzle 14 through a pipe line (not shown) as described above, the vacuum pump 15 is driven to suck air, and the substrate 1 Air is discharged from the shielding material 12 in the target area on the surface la side of the substrate 1 through the air discharge hole 8a of the through hole 5 and the insulating material 8.
- the function of the roller 13a attached to the tip of the pressure welding jig 13 is to enable the shield material 12 to move in the horizontal direction when air is discharged.
- the insulating material 8 When air is discharged from the inside of the shielding material 12, the insulating material 8 is formed with four air discharge holes 8a, so that the insulating material 8 and the substrate 1 are interposed between the insulating material 8 and the shielding material 12.
- the air pressure between and The shape is such that it adheres along the outer shape of C2 and chip part 3.
- the process proceeds to the anisotropic conductive adhesive application step shown in FIG.
- anisotropic conductive adhesive application step as shown in FIG. 5, in the conductive line region 7 of the shield material 12, the outer periphery of the shield material 12 is lifted to the upper outside of the roller 13 a while the substrate 1 Apply anisotropically conductive adhesive 16 (for example, 3373 manufactured by Three Bond) 16 to the conductive line region 7 on the ground pattern of the surface la.
- anisotropically conductive adhesive 16 for example, 3373 manufactured by Three Bond
- the anisotropic conductive adhesive (ACP) 16 is a material having functions of both mechanical connection and electrical connection, and has a conductive filler.
- the anisotropic conductive adhesive 16 is effective in this embodiment because the temperature at which the pressure bonding is short and the temperature at which the pressure bonding is performed is as low as about 120 ° C. More specifically, the anisotropic conductive adhesive (ACP) 16 has a conductive filler mixed in an adhesive (binder), and both members to be bonded by thermocompression bonding are mechanical, Electrically connected.
- the binder is an insulator, insulation is maintained between conductive binders existing in adjacent circuits.
- Thermosetting resin, thermoplastic resin, thermosetting Z thermoplastic mixed resin, etc. are generally used for adhesives, and conductive balls generally used are gold-plated resin balls. .
- the crimping jig 17 is configured to descend from the upper part of the conductive line region 7, and the different coating applied to the conductive line region 7 by the crimping jig 17.
- the shielding material 12 is bonded to the anisotropic conductive adhesive 16 by covering heat and pressure.
- the shield material 12 is covered and fixed on the surface la side of the substrate 1 through the above steps, the outer periphery of the shield material 12 is further cut by the cutting jig 11 in the shield material cutting step. Then, the manufacturing process of the shielding material 12 is completed.
- the shielding material 12 is a metal foil having a single layer structure, it retains the uneven shape formed by exhausting the air inside.
- the insulating material 8 it is convenient to fix the insulating material 8 by applying a small amount of adhesive between the substrate 1 and the insulating material 8 in advance in the recess between the electronic components.
- the electronic device completed through the above steps covers the insulating material 8 in the target region of the electromagnetic wave shield on the surface la side of the substrate 1 on which the IC2 and the chip component 3 which are electronic components are mounted.
- the shield material 12 is covered on the upper surface of 8, and the air inside the shield material 12 is discharged to form the shield material 12 in close contact with the IC 2 and the chip component 3 that are electronic components.
- FIG. 7 is a schematic diagram showing a state in which two general printed wiring boards are opposed to each other
- FIG. 8 is a schematic perspective view showing a height relationship of components in a state in which two general printed wiring boards are opposed to each other
- FIG. 9A Fig. 9 is a view from the direction of arrow A in Fig. 8
- Fig. 9B is a view from the direction of arrow B in Fig. 8
- Fig. 10 A is a state in which two printed wiring boards in Fig. 9A are covered with a general box-type shield
- Fig. 10B is a diagram showing a state where two printed wiring boards in Fig. 9B are covered with a general box type shield.
- Fig. 11A is a state where two printed wiring boards in Fig.
- FIG. 11B is a diagram showing a state in which the shield of this embodiment is covered on the two printed wiring boards of FIG. 9B.
- IC2 and chip component 3 are collectively referred to as electronic component 20.
- two substrates 1A and 1B are arranged so that the electronic component 20 faces each other.
- the two substrates 1A and 1B are arranged using 3D-CAD or the like.
- the electronic components 20 do not interfere with each other.
- the height relationship between the electronic components 20 of the two substrates 1A and 1B is as shown in FIGS. 9A and 9B.
- the general box-shaped shield 21 is manufactured in accordance with the highest part among the electronic parts 20 as shown in FIGS. 10A and 10B. Is extremely difficult to manufacture.
- the electronic components 20 are manufactured with a slight gap at the height as shown in FIGS. 11A and 11B. Therefore, it is possible to easily manufacture a shield suitable for the product specification that is desired to be thin. Note that the insulating material 8 is not shown in FIGS. 10A and 10B, and FIGS. 11A and 11B.
- the shield material 12 is brought into close contact with the electronic component 20 arranged in the target region where the electromagnetic wave shielding of the surface la that is one side of the substrate 1 is performed.
- a desired portion of the mounted electronic component 20 can be shielded against electromagnetic waves on the surface la of the substrate 1. That is, according to the present embodiment, it is possible to effectively shield only the important blocks on which noise countermeasures on the surface la of the substrate 1 should be taken. As a result, unnecessary portions other than the portion to be shielded against electromagnetic waves are not shielded, and the shield material 12 having the minimum necessary size is sufficient.
- the insulating material 8 is provided on the side of the shielding material 12 that is covered with the electronic component 20, thereby providing the shielding material 12 with respect to the electronic component 20, solder, or the like. It can be reliably insulated electrically.
- the air inside the shield material 12 is exhausted and the shield material 12 is formed so as to be in close contact with the electronic component 20, whereby the electronic component 20 and the shield are formed.
- the distance from the material 12 can be made extremely small, and it is close to the shape along the height of the electronic component 20 while having irregularities, so that it is possible to increase the structural volume due to the shielding material 12 in the product specifications. Less.
- the dead space caused by the mismatch of the height of the electronic component 20 as in the product specifications shown in Fig. 11A and Fig. 11B can be eliminated, and while the shielding performance is secured,
- the box-shaped shield material can eliminate structural limitations that cannot be achieved.
- the target region can be completely shielded, so that no slits or holes are generated, and the shielding effect against radioactive noise from the electronic component 20 or pattern is achieved. Will be close to perfection. In addition, it is effective in suppressing electromagnetic interference between the electronic components 20.
- the shielding material coating that covers the shielding material 12 on the electronic component 20 disposed in the target region for electromagnetic wave shielding of the surface la of the substrate 1
- the shielding material 12 is covered with the electronic component 20 by the shielding material coating step, and the shielding material 12 is closely attached to the electronic component 20 by providing an air exhausting process in which the internal force is also discharged.
- the desired portion of the mounted electronic component can be shielded against electromagnetic waves on the surface la of the substrate 1.
- the bonding step of bonding the shielding material 12 covered with the electronic component 20 to the substrate 1 with the anisotropic conductive adhesive 16 is performed.
- both mechanical connection and electrical connection of the shielding material 12 to the substrate 1 can be performed.
- the shield material manufacturing method for an electronic device of the present embodiment by performing the insulating material coating step of covering the insulating material 8 in advance before the shielding material coating step of covering the shield material 12, The shield material 12 can be reliably electrically insulated from the electronic component 20 and solder.
- the cost for carrying out the equipment can be reduced and the manufacturing cost can be easily reduced.
- the vacuum pump 15 is driven to suck air from the shielding material 12, so that the electronic material 20 has the shielding material 12 It can coat
- the anisotropic conductive adhesive (ACP) 16 is applied to the conductive line region 7 to adhere the shield material 12, but the present invention is not limited to this and is formed on the substrate 1. Solder can be used as it is.
- the reflow solder for mounting the electronic component 20 on the surface la side of the substrate 1 is placed in advance in the conductive line region 7 by removing the mask, and the temperature of the crimping jig 17 is increased to the melting point of the solder.
- the shield material 12 which is also solder and metal foil, is conducted by thermocompression bonding.
- the metal foil of the shield material 12 used at this time it is desirable to use a copper foil or the like to be joined to solder. This eliminates the need to apply the anisotropic conductive adhesive (ACP) 16 and bond the shield material 12.
- ACP anisotropic conductive adhesive
- the shield material 12 is anisotropically conductive bonded so that the conductive wire region 7 covers the upper surface of the insulating material 8.
- Adhesive (AC P) 16 is used for bonding, but it is not limited to this. Adhering laminated materials in which metal layers such as copper foil are laminated using polyethylene as a base material in the target area for electromagnetic wave shielding. You may make it do. In this case, if the laminated material is heated up to the melting temperature of the solder in the same manner as described above and then subjected to pressure bonding, the heat resistance temperature of the base material such as polyethylene will be exceeded.
- the solder on one side of the substrate and the metal layer of the shielding material 12 are brought into conduction by pressure bonding through the base material portion.
- the step of bonding the insulating material 8 to the bonding line region 6 with an adhesive can be omitted.
- FIG. 12 is a cross-sectional view showing a state where the printed wiring board is covered with an insulating material and a shielding material in the second embodiment of the present application. Note that the same reference numerals are used for the same or corresponding parts as those in the first embodiment. The same applies to other embodiments.
- the insulating material 8 and the shield material 12 are pressed by the pressing jig 23 without using the vacuum pump 15 of the first embodiment.
- the insulating material 8 and the shielding material 12 are pressed against the surface la side force of the base plate 1 using the pressing jig 23, and the air in the insulating material 8 and the shielding material 12 is passed through the through-hole 5 or the like.
- the shielding material 12 is approximated to a shape formed by discharging air by the vacuum pump 15 of the first embodiment.
- the pressing jig 23 is not necessarily a hard material such as a press die, and a slightly soft material is used for the contact surface with the shield material 12.
- a plurality of recesses 24 are formed on the front end surface of the pressing jig 23 corresponding to the arrangement form of the electronic component 20.
- the air inside the shield material 12 can be discharged by the pressing jig 23 so that the shield material 12 is brought into close contact with the electronic component 20. And miniaturization can be achieved. Since other configurations and operations are the same as those of the first embodiment, description thereof will be omitted.
- FIG. 13 is a cross-sectional view showing a state in which a heat dissipation measure is taken in the third embodiment of the present application
- FIG. 14 is a cross-sectional view showing an operation in a state in which the heat dissipation measure is taken in FIG.
- an opening 26 for heat dissipation is formed in the insulating material 8 located above the electronic component 20 serving as a representative heat source.
- the insulating material 8 located above the electronic component 20 serving as a representative heat source.
- the above-described conventional invention has a configuration in which the printed wiring board is vacuum-packed with a bag-like body having a laminated film force having an electromagnetic wave shielding layer, and therefore, a heat sink is provided on the electronic component mounted on the printed wiring board. There is a problem that internal heat dissipation measures cannot be taken.
- the upper force of the electronic component 20 serving as a representative heat source also transfers heat to the shield material 12 via the heat conductive sheet material 27. If a heat radiating member such as a heat sink (not shown) is disposed outside the shield material 12, for example, the heat of the electronic component 20 serving as a typical heat source can be absorbed by the heat radiating member and radiated.
- a heat radiating member such as a heat sink (not shown) is disposed outside the shield material 12, for example, the heat of the electronic component 20 serving as a typical heat source can be absorbed by the heat radiating member and radiated.
- the opening 26 for heat dissipation is formed in the insulating material 8 located on the upper part of the electronic component 20 that is a representative heat source, and the opening 26 is closed. Even if the internal space of the shield material 12 is narrowed by forming the shield material 12 in close contact with the electronic component 20 by sticking the heat conductive sheet material 27, the electronic component 20 is not impaired. It is possible to provide a route for transferring the heat of the outside to the outside, and the heat of the electronic component 20 can be reliably radiated. Other configurations and operations are the same as those in the first embodiment, and thus description thereof is omitted.
- FIG. 15 is a plan view showing an adhesive line region and a conductive line region provided on the printed wiring board according to the fourth embodiment of the present application.
- rounded portions 6a and 7a are formed at the corners of the bonding line region 6 and the conductive line region 7, respectively.
- the corners of the insulating material 8 and the shielding material 12 are also rounded.
- the rounded portions 6a and 7a are formed at the respective corners of the bonding wire region 6 and the conductive wire region 7, and the corners of the insulating material 8 and the shielding material 12 are also rounded in accordance with this.
- the corners of the insulating material 8 bonded to the adhesive 9 in the bonding line region 6 and the shielding material bonded to the anisotropic conductive adhesive (ACP) 16 applied to the conductive line region 7 are obtained. It is possible to prevent cracks and breaks from occurring in the 12 corners during the production process.
- Other structures Since the composition and operation are the same as those of the first embodiment, the description thereof is omitted.
- the navigation apparatus is applied to each of the above embodiments as an example of an electronic device, the present invention is not limited to this.
- a notebook computer a mobile phone, a digital camera, etc. It can also be applied to various consumer electronic devices that are required to be downsized.
- the present invention is not limited to the above embodiments.
- Each of the above-described embodiments is an exemplification, and has any configuration that is substantially the same as the technical idea described in the claims of the present invention, and that has the same functions and effects. It is included in the technical scope of the present invention.
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- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2006/316994 WO2008026257A1 (en) | 2006-08-29 | 2006-08-29 | Electronic device and method for manufacturing shielding material for same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2006/316994 WO2008026257A1 (en) | 2006-08-29 | 2006-08-29 | Electronic device and method for manufacturing shielding material for same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008026257A1 true WO2008026257A1 (en) | 2008-03-06 |
Family
ID=39135549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2006/316994 Ceased WO2008026257A1 (en) | 2006-08-29 | 2006-08-29 | Electronic device and method for manufacturing shielding material for same |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2008026257A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010011200A (ja) * | 2008-06-27 | 2010-01-14 | Canon Inc | æ®åè£ çœ® |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5856497U (ja) * | 1981-10-13 | 1983-04-16 | äžæŽé»æ©æ ªåŒäŒç€Ÿ | é»ç£é®èœã«ãâ |
| JPS60241237A (ja) * | 1984-05-15 | 1985-11-30 | Mitsubishi Electric Corp | æ··æéç©åè·¯è£ çœ® |
| JPH0472698A (ja) * | 1990-07-12 | 1992-03-06 | Matsushita Electric Ind Co Ltd | ã·ãŒã«ãè£ çœ® |
| JPH08125382A (ja) * | 1994-10-26 | 1996-05-17 | Matsushita Electric Ind Co Ltd | ããªã³ãåºæ¿è£ 眮 |
| JPH1187984A (ja) * | 1997-09-05 | 1999-03-30 | Yamaichi Electron Co Ltd | å®è£ åè·¯è£ çœ® |
| JP2003163464A (ja) * | 2001-11-27 | 2003-06-06 | Matsushita Electric Works Ltd | é ç·æ¿ã®è£œé æ¹æ³ |
| JP2003298273A (ja) * | 2002-04-03 | 2003-10-17 | Kitagawa Ind Co Ltd | ã«ããŒæ§é åã³ãã®åœ¢ææ¹æ³ |
| WO2003092347A1 (en) * | 2002-04-23 | 2003-11-06 | Nec Corporation | Electromagnetically shielded circuit device and shielding method therefor |
-
2006
- 2006-08-29 WO PCT/JP2006/316994 patent/WO2008026257A1/ja not_active Ceased
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5856497U (ja) * | 1981-10-13 | 1983-04-16 | äžæŽé»æ©æ ªåŒäŒç€Ÿ | é»ç£é®èœã«ãâ |
| JPS60241237A (ja) * | 1984-05-15 | 1985-11-30 | Mitsubishi Electric Corp | æ··æéç©åè·¯è£ çœ® |
| JPH0472698A (ja) * | 1990-07-12 | 1992-03-06 | Matsushita Electric Ind Co Ltd | ã·ãŒã«ãè£ çœ® |
| JPH08125382A (ja) * | 1994-10-26 | 1996-05-17 | Matsushita Electric Ind Co Ltd | ããªã³ãåºæ¿è£ 眮 |
| JPH1187984A (ja) * | 1997-09-05 | 1999-03-30 | Yamaichi Electron Co Ltd | å®è£ åè·¯è£ çœ® |
| JP2003163464A (ja) * | 2001-11-27 | 2003-06-06 | Matsushita Electric Works Ltd | é ç·æ¿ã®è£œé æ¹æ³ |
| JP2003298273A (ja) * | 2002-04-03 | 2003-10-17 | Kitagawa Ind Co Ltd | ã«ããŒæ§é åã³ãã®åœ¢ææ¹æ³ |
| WO2003092347A1 (en) * | 2002-04-23 | 2003-11-06 | Nec Corporation | Electromagnetically shielded circuit device and shielding method therefor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010011200A (ja) * | 2008-06-27 | 2010-01-14 | Canon Inc | æ®åè£ çœ® |
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