GB2378582A - A method of providing radio frequency screening for electronic components - Google Patents
A method of providing radio frequency screening for electronic components Download PDFInfo
- Publication number
- GB2378582A GB2378582A GB0119673A GB0119673A GB2378582A GB 2378582 A GB2378582 A GB 2378582A GB 0119673 A GB0119673 A GB 0119673A GB 0119673 A GB0119673 A GB 0119673A GB 2378582 A GB2378582 A GB 2378582A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamina
- insulating
- screening
- laminate
- 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.)
- Granted
Links
- 238000012216 screening Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000000853 adhesive Substances 0.000 claims abstract description 5
- 230000001070 adhesive effect Effects 0.000 claims abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 18
- 239000010949 copper Substances 0.000 claims description 18
- 239000002131 composite material Substances 0.000 claims description 15
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 claims description 12
- 229920001721 polyimide Polymers 0.000 claims description 10
- 229920000642 polymer Polymers 0.000 claims description 10
- 239000004642 Polyimide Substances 0.000 claims description 8
- 238000005476 soldering Methods 0.000 claims description 7
- 239000012790 adhesive layer Substances 0.000 claims description 5
- 229920006254 polymer film Polymers 0.000 claims description 5
- 229910000679 solder Inorganic materials 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 239000002648 laminated material Substances 0.000 description 3
- IHIDFKLAWYPTKB-UHFFFAOYSA-N 1,3-dichloro-2-(4-chlorophenyl)benzene Chemical compound C1=CC(Cl)=CC=C1C1=C(Cl)C=CC=C1Cl IHIDFKLAWYPTKB-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 241000212342 Sium Species 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/0084—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a single continuous metallic layer on an electrically insulating supporting structure, e.g. metal foil, film, plating coating, electro-deposition, vapour-deposition
-
- 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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/28—Applying non-metallic protective coatings
- H05K3/284—Applying non-metallic protective coatings for encapsulating mounted components
-
- 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
- H05K9/002—Casings with localised screening
- H05K9/0022—Casings with localised screening of components mounted on printed circuit boards [PCB]
- H05K9/0024—Shield cases mounted on a PCB, e.g. cans or caps or conformal shields
- H05K9/003—Shield cases mounted on a PCB, e.g. cans or caps or conformal shields made from non-conductive materials comprising an electro-conductive coating
Abstract
A method of providing radio frequency screening for electronic components, the method being performed using: (i) a first laminate comprising an insulating lamina (12) and a shielding lamina (14); and (ii) a second insulating lamina (18); and the method comprising the steps: (a) bonding the first laminate and the second insulating lamina together by adhesive (16) such that the shielding lamina (14) is sandwiched between the two insulating laminae (12,18); (b) placing the laminate structure (22) formed in step (a) over an electronic component (34) on a circuit board (32) such that the second insulating lamina (18) is adjacent the component (34) and (c) joining (24a) the shielding lamina (14) to the circuit board at least partly around the component.
Description
<Desc/Clms Page number 1>
A METHOD OF PROVIDING RADIO FREQUENCY SCREENING
FOR ELECTRONIC COMPONENTS This invention relates to a method of providing radio frequency screening for electronic components.
There is an ever-increasing desire to miniaturise electronic components and improve their compactness. This is particularly relevant in assemblies in which the overall height of the printed circuit board (PCB) and components attached thereto is restricted, such as within a PC card enclosure.
Current radio frequency (RF) screening devices for electronic components are made from sheet metal and are at least 0.2 mm thick. Electrical and mechanical clearance between the screening and the components being screened is also required, adding at least 0. 3-0. 4 mm to the height of the PCB assembly. Plastic moulded screens with metallic coatings are also available but are even thicker than the metal ones and hence occupy even more space within the limited confines of the enclosure.
A further problem with conventional methods of applying screening to electronic components arises in cases in which a PCB assembly is designed without any screening, but then, during testing, screening is found to be required. Since screening was not originally incorporated in the original design, it is often found that adding screening at this late stage is not readily achievable because of its size, and hence re-design of the PCB architecture becomes necessary. This re-design process is potentially expensive and time consuming, and may delay the release of a product onto the market. Since the market for computing and
<Desc/Clms Page number 2>
electronic components is ever-changing, such a delay may result in the manufacturer being put at a severe competitive disadvantage.
It is a general object of the present invention to overcome or at least mitigate the problems, shortcomings and disadvantages identified above.
A method of providing radio frequency screening for electronic components, the method being performed using : (i) a first laminate comprising an insulating lamina and a shielding lamina ; and (ii) a second insulating lamina ; and the method comprising the steps : (a) bonding the first laminate and the second insulating lamina together such that the shielding lamina is sandwiched between the two insulating laminae ; (b) placing the laminate structure formed in step (a) over an electronic component on a circuit board such that the second insulating lamina is adjacent the component ; and (c) joining the shielding lamina to the circuit board at least partly around the component.
Advantageously, by fabricating the radio frequency screening from laminae in such a manner, an extremely thin composite screening structure may be made, potentially 120 pm or even less in thickness. Because it may be made so thin, applying the screening to electronic components on a PCB adds only slightly to the overall assembly height. As a consequence, screening may now be fitted in electronic apparatus where limited height constraints would prevent the use of conventional screening. The use of insulating laminae either side of the shielding lamina enables the screening to touch not only the components shielded inside it, but also enables other components to touch the outer surface of the screening, all without risk of short-circuiting. This thereby enables the overall height of the PCB assembly to be reduced.
<Desc/Clms Page number 3>
Preferably the second insulating lamina is smaller in area than the first laminate, such that the first laminate extends outwardly beyond the second insulating lamina.
Preferably the second insulating lamina is a overlay pre-coated with an adhesive. This adhesive, which may have a thickness of as little as 35 f. ! m, or even less, advantageously facilitates the bonding of the first laminate and the second insulating lamina.
Preferably the overlay is a composite of a polymer film and adhesive layer. The polymer film advantageously enables the laminate to be flexible, thereby facilitating its fitting, particularly into confined spaces. Particularly preferably the polymer film in the coverlay is a polyimide.
Most preferably the polyimide film in the overlay is Kapton (RTM). Most preferably the /'T) Kapton 11m has a thickness of 25 pm.
A
Preferably the insulating lamina in the first laminate is a polymer. As mentioned above, the use of a polymer advantageously enables the lamina to be flexible.
Particularly preferably the insulating lamina is a polyimide.
T) Most preferably the polyimide in the insulating lamina is Kapt01. Kapto'iis advantageously readily available as a suitably thin film.
(kam) Most preferably the Kaptonfnsulating lamina has a thickness of 25 m.
<Desc/Clms Page number 4>
Preferably the shielding lamina in the first laminate is metallic. This advantageously provides highly effective shielding against radio frequency interference.
Preferably the metallic lamina is copper. Most preferably the copper lamina has a thickness of 35 sium.
Preferably step (c) of joining the shielding lamina to the circuit board is performed by soldering. This is advantageously facilitated if, as described above, the first laminate extends outwardly beyond the second insulating lamina. Particularly preferably the step of soldering is performed by hot bar soldering. In this technique the exposed edge of the metallic screen is pressed onto solidified solder on a screening can track on the PCB, using a hot implement. This re-melts the solder and attaches the screen to the PCB.
According to the present invention there is also provided a laminate structure for screening electronic components against radio frequency interference comprising a shielding lamina sandwiched between first and second insulating laminae.
Preferably the first insulating lamina and the shielding lamina are of substantially the same area, and the second insulating lamina is of a slightly smaller area such that the first insulating lamina and the shielding lamina both extend outwards beyond the second insulating lamina.
Particularly preferably one or both of the insulating laminae are made of a polymer.
<Desc/Clms Page number 5>
Particularly preferably the polymer is a polyimide. Most preferably the polymer is Kapton
Preferably the screening lamina is metallic. Particularly preferably the screening lamina is made of copper.
Preferably one or both of the insulating laminae are 25 m thick, and the screening lamina is 35 I ! m thick. These thicknesses advantageously result in an extremely thin screening assembly.
Embodiments of the invention will now be described, by way of example, and with reference to the drawings in which: Figure 1 illustrates a cross-section view of the laminate materials used to fabricate RF screening, both before bonding (Figure 1 a) and after bonding (Figure 1 b) ; Figure 2 illustrates a plan view from below of a composite laminate screening structure, prior to being attached to a PCB; Figure 3 illustrates a side view of RF screening having been attached to a PCB; Figure 4 illustrates a perspective view of RF screening enveloping a component on a PCB; and Figure 5 illustrates a cross section view through a PCB assembly, showing a component on a PCB having been screened using an embodiment of the invention.
<Desc/Clms Page number 6>
As shown in Figure 1, RF screening may be fabricated by taking two pre-prepared laminate materials, the first 10 being a laminate of Kapton (RTM) 12 and copper 14, and the second 11 being a overlay of Kapton 18 and adhesive 16. Using the adhesive layer to bond the two laminates, as shown in Figure 1 b, a composite laminate screening structure 13 may be fabricated.
(Tt) T) A Kapton/laminate and overlay are used since Kapton/films are flexible, electrically il insulating, and readily available as thin films. Copper is known by those skilled in the art to (as) be an effective RF shield. Each Kapton/layer 12, 18 is approximately 25 11m in thickness, the 11 copper shielding layer 14 is approximately 35 jlm in thickness, and the adhesive layer 16 is also approximately 35 jlm thick. This results in a composite laminate screening structure 13 approximately 120 am in thickness. It will be appreciated by those skilled in the art that thinner layers may be attainable, resulting in an even thinner composite structure, and that alternative materials may be employed.
In the composite laminate screening structure 13, the copper shielding layer 14 is covered
on its outer surface (i. e. the surface furthest from the component in use) by a layer of (RTM) Kaptor This enables other components within the electronic device to come into contact with the shielding without causing short circuiting. The overlay 11 that is bonded to the inner surface of the copper shielding 14 (i. e. closest to the component in use) is slightly ) smaller in area than the Kapt01copper outer laminate 10, thereby giving exposed copper
regions. These exposed regions of copper 14 are then joined onto a screening can track on a PCB without being impeded by an insulating laminate material in that region.
<Desc/Clms Page number 7>
The planar area of the composite laminate screening structure 13 may potentially be any size. In use it would be a shape and size 20 appropriate for the component that requires RF screening. As shown in Figures 2, 3, 4 and 5, a substantial area 22 of the screening structure 20 is used to cover the top of the component 34. Extending tab-like regions 23a- 23d of the composite structure are shaped to be folded around the sides of the component, whilst the regions 24a-24d of the structure that present exposed copper extend yet further and are shaped such that they may be folded through approximately a right angle in order to be attached to a screening can track 30 on the PCB 32.
Figures 4 and 5 show the composite structure having been folded such that the side regions 23a - 23d envelop the sides of the component 34, with the exposed copper regions 24a- 24d having been folded around for joining to a screening can track 30 on the PCB 32.
In the overall assembly of a PCB having shielded components, the method of manufacture is as follows : During surface mount component assembly, solder paste is applied to the screening can track on the PCB, and this solder is then re-flowed as the surface mount components (microchips, resistors, etc.) are soldered in place. The screening is then placed in position over the components as desired and is hot bar soldered onto the screening can track. Hot bar soldering involves using a hot bar to press the exposed copper edge of the composite laminate screening structure onto the solidified solder on the screening can track.
This causes the solder to be re-melted and attaches the screen to the PCB.
(rut It should be stressed that other insulating materials could be used instead of Kapton/, for A example, polyester, although this would require attaching to the PCB using double sided ) conductive adhesive film. Kaptorilaminates have been chosen for this particular illustration
<Desc/Clms Page number 8>
of the invention because they are readily available in the required thickness, and a very thin composite laminate screening structure may easily be fabricated from this material by a manufacturer of flexible PCBs.
(vnre) Since the copper shielding is insulated on both sides by Kapton the composite laminate screening structure may be directly in contact with components on the PCB. Since no air gaps are necessary either side of the copper shielding, the overall increase in the height of the PCB assembly is only the thickness of the composite shielding laminate structure, i. e.
120 m, or even less.
Claims (28)
- CLAIMS 1. A method of providing radio frequency screening for electronic components, the method being performed using: (i) a first laminate comprising an insulating lamina and a shielding lamina ; and (ii) a second insulating lamina, and the method comprising the steps: (a) bonding the first laminate and the second insulating lamina together such that the shielding lamina is sandwiched between the two insulating laminae ; (b) placing the laminate structure formed in step (a) over an electronic component on a circuit board such that the second insulating lamina is adjacent the component; and (c) joining the shielding lamina to the circuit board at least partly around the component.
- 2. A method as claimed in Claim 1 wherein the second insulating lamina is smaller in area than the first laminate, such that the first laminate extends outwardly beyond the second insulating lamina.
- 3. A method as claimed in Claim 1 or Claim 2 wherein the second insulating lamina is a overlay pre-coated with an adhesive.
- 4. A method as claimed in Claim 3 wherein the overlay is a composite of a polymer film and an adhesive layer.<Desc/Clms Page number 10>
- 5. A method as claimed in Claim 4 wherein the polymer film in the overlay is a polyimide.(I {I)
- 6. A method as claimed in Claim 5 wherein the polyimide film in the overlay is Kaptorr )
- 7. A method as claimed in Claim 6 wherein the Kaptorifilm has a thickness of 25 m.
- 8. A method as claimed in any of Claims 1 to 7 wherein the insulating lamina in the first laminate is a polymer.
- 9. A method as claimed in Claim 8 wherein the polymer in the insulating lamina is a polyimide.
- 10. A method as claimed in Claim 9 wherein the polyimide in the insulating lamina is Kapton(RTM)('/Z-rm)
- 11. A method as claimed in Claim 10 wherein the Kapton, (insulating lamina has a thickness of 25 jim.
- 12. A method as claimed in any of Claims 1 to 11 wherein the shielding lamina in the first laminate is metallic.
- 13. A method as claimed in Claim 12 wherein the metallic lamina is copper.<Desc/Clms Page number 11>
- 14. A method as claimed in Claim 13 wherein the copper lamina has a thickness of 35 11m.
- 15. A method as claimed in any of Claims 3 to 14 wherein the adhesive layer has a thickness of 35 11m.
- 16. A method as claimed in any of Claims 1 to 15 wherein step (c) of joining the shielding lamina to the circuit board is performed by soldering.
- 17. A method as claimed in Claim 16 wherein the step of soldering is performed by hot bar soldering.
- 18. A laminate structure for screening electronic components against radio frequency interference comprising a shielding lamina sandwiched between first and second insulating laminae.
- 19. A laminate structure as claimed in Claim 18 wherein the first insulating lamina and the shielding lamina are of substantially the same area, and wherein the second insulating lamina is of a slightly smaller area such that the first insulating lamina and the shielding lamina both extend outwards beyond the second insulating lamina.
- 20. A laminate structure as claimed in either of Claims 18 or 19 wherein one or both of the insulating laminae are made of a polymer.
- 21. A laminate structure as claimed in Claim 20 wherein the polymer is a polyimide.<Desc/Clms Page number 12>
- 22. A laminate structure as claimed in Claim 21 wherein the polymer is Kapton (RTM).
- 23. A laminate structure as claimed in any of Claims 18 to 22 wherein the screening lamina is metallic.
- 24. A laminate structure as claimed in Claim 23 wherein the screening lamina is made of copper.
- 25. A laminate structure as claimed in any of Claims 18 to 24 wherein one or both of the insulating laminae are 25 m thick.
- 26. A laminate structure as claimed in any of Claims 18 to 25 wherein the screening lamina is 35 p. m thick.
- 27. A method of providing radio frequency screening for electronic components substantially as hereinbefore described with reference to the accompanying drawings.
- 28. A laminate structure for screening electronic components against radio frequency interference substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0119673A GB2378582B (en) | 2001-08-11 | 2001-08-11 | A method of providing radio frequency screening for electronic components |
EP02749080A EP1415521B1 (en) | 2001-08-11 | 2002-07-30 | A method of providing radio frequency screening for electric components |
AT02749080T ATE332073T1 (en) | 2001-08-11 | 2002-07-30 | METHOD FOR RADIO FREQUENCY SHIELDING OF ELECTRONIC COMPONENTS |
PCT/GB2002/003469 WO2003015487A1 (en) | 2001-08-11 | 2002-07-30 | A method of providing radio frequency screening for electric components |
DE60212855T DE60212855T2 (en) | 2001-08-11 | 2002-07-30 | METHOD FOR RADIO FREQUENCY SHIELDING OF ELECTRONIC COMPONENTS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0119673A GB2378582B (en) | 2001-08-11 | 2001-08-11 | A method of providing radio frequency screening for electronic components |
Publications (3)
Publication Number | Publication Date |
---|---|
GB0119673D0 GB0119673D0 (en) | 2001-10-03 |
GB2378582A true GB2378582A (en) | 2003-02-12 |
GB2378582B GB2378582B (en) | 2005-03-16 |
Family
ID=9920267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0119673A Expired - Fee Related GB2378582B (en) | 2001-08-11 | 2001-08-11 | A method of providing radio frequency screening for electronic components |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1415521B1 (en) |
AT (1) | ATE332073T1 (en) |
DE (1) | DE60212855T2 (en) |
GB (1) | GB2378582B (en) |
WO (1) | WO2003015487A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006052158A1 (en) | 2004-11-10 | 2006-05-18 | Bronya Tsoy | Material for components of radio-electronic devices |
EP2099212A1 (en) * | 2008-03-06 | 2009-09-09 | SMK Corporation | Shield method for electronic component enclosure and shield material |
DE102011089639A1 (en) * | 2011-12-22 | 2013-06-27 | Siemens Aktiengesellschaft | Circuit carrier with a separate RF circuit and method for assembling such a circuit carrier |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7161092B2 (en) * | 2002-04-15 | 2007-01-09 | Visteon Global Technologies, Inc. | Apparatus and method for protecting an electronic circuit |
EP2043149A1 (en) | 2007-09-27 | 2009-04-01 | Oticon A/S | Assembly comprising an electromagnetically screened smd component, method of manufacturing the same and use |
CN101800215B (en) * | 2009-02-11 | 2012-07-04 | 日月光半导体制造股份有限公司 | Wireless communication module package structure |
JP2011018873A (en) | 2009-05-22 | 2011-01-27 | Sony Ericsson Mobilecommunications Japan Inc | Electromagnetic shielding method and electromagnetic shielding film |
CN105555018A (en) * | 2016-02-16 | 2016-05-04 | 广东欧珀移动通信有限公司 | Printed circuit board and electronic terminal |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1088408A (en) * | 1966-07-15 | 1967-10-25 | Standard Telephones Cables Ltd | Electrical screening |
EP0109505A2 (en) * | 1982-10-25 | 1984-05-30 | Allied Corporation | A stampable polymeric composite containing an EMI/RFI shielding layer |
US4670347A (en) * | 1986-03-12 | 1987-06-02 | Topflight Corp. | RFI/EMI shielding apparatus |
GB2200321A (en) * | 1987-02-03 | 1988-08-03 | Pilkington Brothers Plc | Electromagnetic shielding laminate |
GB2245710A (en) * | 1990-06-24 | 1992-01-08 | Barkley & Dexter Lab Inc | Search coil assembly with laminate frame members and method for making same |
US5545494A (en) * | 1995-08-10 | 1996-08-13 | Northern Telecom Limited | Environmental protectors for electronics devices |
EP0790123A2 (en) * | 1996-02-14 | 1997-08-20 | James River Corporation Of Virginia | Patterned metal foil laminate and method for making same |
US5702994A (en) * | 1991-10-05 | 1997-12-30 | Besma Beschichtungsmassen Gmbh | Moldable film for fastening to a base and shielding from radiation or for insulation of electrically conducting parts |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5557064A (en) * | 1994-04-18 | 1996-09-17 | Motorola, Inc. | Conformal shield and method for forming same |
FI956226A (en) * | 1995-12-22 | 1997-06-23 | Nokia Mobile Phones Ltd | Method and apparatus for electromagnetic protection of an electromagnetic agent |
JP3723338B2 (en) * | 1997-01-23 | 2005-12-07 | 株式会社クラレ | Sheet-like laminate and method for producing the same |
TW355163B (en) * | 1997-01-23 | 1999-04-01 | Shiyouritsu Plast Kogyo Kk | Sheet-like laminate and preparation thereof |
US5867371A (en) * | 1997-09-29 | 1999-02-02 | Ericsson Inc. | Cover member for sealed circuit board assembly |
US6768654B2 (en) * | 2000-09-18 | 2004-07-27 | Wavezero, Inc. | Multi-layered structures and methods for manufacturing the multi-layered structures |
-
2001
- 2001-08-11 GB GB0119673A patent/GB2378582B/en not_active Expired - Fee Related
-
2002
- 2002-07-30 WO PCT/GB2002/003469 patent/WO2003015487A1/en active IP Right Grant
- 2002-07-30 EP EP02749080A patent/EP1415521B1/en not_active Expired - Lifetime
- 2002-07-30 DE DE60212855T patent/DE60212855T2/en not_active Expired - Fee Related
- 2002-07-30 AT AT02749080T patent/ATE332073T1/en not_active IP Right Cessation
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1088408A (en) * | 1966-07-15 | 1967-10-25 | Standard Telephones Cables Ltd | Electrical screening |
EP0109505A2 (en) * | 1982-10-25 | 1984-05-30 | Allied Corporation | A stampable polymeric composite containing an EMI/RFI shielding layer |
US4670347A (en) * | 1986-03-12 | 1987-06-02 | Topflight Corp. | RFI/EMI shielding apparatus |
GB2200321A (en) * | 1987-02-03 | 1988-08-03 | Pilkington Brothers Plc | Electromagnetic shielding laminate |
GB2245710A (en) * | 1990-06-24 | 1992-01-08 | Barkley & Dexter Lab Inc | Search coil assembly with laminate frame members and method for making same |
US5702994A (en) * | 1991-10-05 | 1997-12-30 | Besma Beschichtungsmassen Gmbh | Moldable film for fastening to a base and shielding from radiation or for insulation of electrically conducting parts |
US5545494A (en) * | 1995-08-10 | 1996-08-13 | Northern Telecom Limited | Environmental protectors for electronics devices |
EP0790123A2 (en) * | 1996-02-14 | 1997-08-20 | James River Corporation Of Virginia | Patterned metal foil laminate and method for making same |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006052158A1 (en) | 2004-11-10 | 2006-05-18 | Bronya Tsoy | Material for components of radio-electronic devices |
EP1818168A1 (en) * | 2004-11-10 | 2007-08-15 | Bronya Tsoy | Material for components of radio-electronic devices |
EP1818168A4 (en) * | 2004-11-10 | 2008-09-03 | Bronya Tsoy | Material for components of radio-electronic devices |
EP2099212A1 (en) * | 2008-03-06 | 2009-09-09 | SMK Corporation | Shield method for electronic component enclosure and shield material |
DE102011089639A1 (en) * | 2011-12-22 | 2013-06-27 | Siemens Aktiengesellschaft | Circuit carrier with a separate RF circuit and method for assembling such a circuit carrier |
Also Published As
Publication number | Publication date |
---|---|
GB2378582B (en) | 2005-03-16 |
EP1415521A1 (en) | 2004-05-06 |
DE60212855T2 (en) | 2007-02-01 |
ATE332073T1 (en) | 2006-07-15 |
GB0119673D0 (en) | 2001-10-03 |
DE60212855D1 (en) | 2006-08-10 |
WO2003015487A1 (en) | 2003-02-20 |
EP1415521B1 (en) | 2006-06-28 |
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Effective date: 20060811 |