EP0781085A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method and arrangement for electromagnetically shielding an electronic means
Assignee: Nokia Oyj
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Filing: 1996-12-18
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Granted: —
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Expires: 2016-12-18
Abstract
Abstract The invention relates to a method and an arrangement for shielding an electronic means (40, 41) against external electromagnetic interference on one hand, and preventing the electronic means from interfering with closeby electric devices on the other hand. According to the invention, a shielding film (42, 43) with one or more layers is formed comprising one or more intrinsically conductive polymer films (43) and one or more insulating films (42). The shielding film (42, 43) so formed is attached to the surface of the electronic means (40, 41) using a heat treatment or a vacuum treatment or the combination of the two and, if necessary, a separate layer of glue. The invention also relates to a method for electrically connecting (44, 45, 46, 47) the intrinsic polymer layer (43) reliably to the electronic means (40, 41). The invention further relates to a method for using the electromagnetic shield to form capacitors and resistors for the electronic means.
Inventors
- 👤 Seppo Pienimaa
- 👤 Tapani Taka
- 👤 Heikki Isotalo
- 👤 Salme Jussila
- 👤 Olli Salmela
- 👤 Henrik Stubb
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 00:17
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/22; H05K3/28; H05K3/284; H05K9/00; H05K9/0007; H05K9/002; H05K9/0039; H05K1/00; H05K1/16; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913; Y10T29/49146; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24479; Y10T428/24521; Y10T428/24545
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
42 words
A method of providing electromagnetic shielding for an electronic means (26, 40, 41), characterized in that said electronic means is coated with an electrically insulating film (21, 42) and said electrically insulating film is coated with an electrically conductive film (22, 43).
Claim 2
Dependent Claim
28 words
The method of claim 1, characterized in that the electrically conductive material is made to have such a thickness that the shielding effect is substantially based on reflection.
Claim 3
Dependent Claim
39 words
The method of claim 1 or 2, characterized in that a liquid conductive material (22) is spread by spinning, spraying or dipping onto the surface of said electrically insulating film (21) in order to produce said electrically conductive film.
Claim 4
Dependent Claim
22 words
The method of claim 1, 2 or 3, characterized in that said conductive film material (22) is an intrinsic PANI/CSA polymer film.
Claim 5
Dependent Claim
31 words
The method of claim 1 or 2, characterized in that a liquid conductive material is solidified into a solid conductive film which is attached to an insulating film using hot moulding.
Claim 6
Dependent Claim
19 words
The method of claim 5, characterized in that said conductive film material (43) is an intrinsic PANI/DBSA polymer film.
Claim 7
Independent Claim
25 words
The method of any one of the preceding claims, characterized in that said insulating film material (20, 42) is a polycarbonate, polyurethane or polyvinyl fluoride.
Claim 8
Independent Claim
39 words
The method of any one of the preceding claims, characterized in that to attach said insulating film (20, 42) to the surface of an electronic device said insulating film material is coated with glue, thermally treated and vacuum treated.
Claim 9
Independent Claim
25 words
The method of any one of the preceding claims, characterized in that said conductive film (43) is electrically connected to said electronic means (40, 41).
Claim 10
Dependent Claim
88 words
The method of claim 9, characterized in that to electrically connect the conductive film (43) to the electronic means (40, 41) - a conductor area (44) is formed on the surface of the electronic means, - a hole is made at said conductor area (44) in the shielding film comprising one or more insulating films (42) and one or more conductive films (43), and - the conductive film or films are connected through said hole to the conductor area (44) by means of an electrically conductive substance (45).
Claim 11
Dependent Claim
86 words
The method of claim 9, characterized in that to connect the conductive film to the electronic means (40. 41) - the electronic means is provided with an electrically conductive projection (46) perpendicular to the surface of the electronic means, - said insulating film (42) and conductive film (43) are attached to the surface of the electronic means in a manner such that said projection (46) penetrates said films and - said projection (46) is connected to the conductive film (43) through an electrically conductive substance (47).
Claim 12
Dependent Claim
28 words
The method of claim 10 or 11, characterized in that said electrically conductive substance (47) is an intrinsically conductive polymer, a graphite paste or a polymer containing silver.
Claim 13
Dependent Claim
51 words
An arrangement for electromagnetically shielding an electronic means (40, 41), characterized in that it comprises at least one electrically conductive film (43) to shield against electromagnetic radiation and at least one electrically insulating film (42) to insulate said electrically conductive film (43) from the electrically conductive parts in the electronic means.
Claim 14
Dependent Claim
36 words
The arrangement of claim 13, characterized in that said insulating film (42) is attached to the surface of said electronic means and said conductive film (43) is attached to the surface of said insulating film (42).
Claim 15
Dependent Claim
20 words
The arrangement of claim 13 or 14, characterized in that said conductive film (43) is an intrinsically conductive polymer film.
Claim 16
Dependent Claim
30 words
The arrangement of any one of claims 13 to 15, characterized in that the arrangement comprises means to electrically connect said conductive film (43) to said electronic means (40, 41).
Claim 17
Dependent Claim
74 words
The arrangement of claim 16, characterized in that said means for the electric connection comprises a conductor area (44) on the surface of the electronic means, an insulating film (42) and a conductive film (43) attached to the surface of the electronic means, which have a hole at said conductor area (44), and a conductive substance (45) which electrically connects the edge of the hole in the conductive film to said conductor area (44).
Claim 18
Dependent Claim
42 words
The arrangement of any one of claims 13 to 17, characterized in that the arrangement comprises at least two insulator films and at least two conductive films which form a layered structure in which said insulator films and said conductive films alternate.
Claim 19
Dependent Claim
47 words
The arrangement of claim 18, characterized in that the arrangement comprises two electrically separated areas (506, 507) of conductive film at the opposite surfaces of the insulator film, and said conductive areas are connected electrically to said electronic means to form a capacitor in an electronic circuit.
Claim 20
Dependent Claim
42 words
The arrangement of any one of claims 13 to 18, characterized in that the arrangement comprises an electrically separated area (511) of conductive film, and two points of said conductive area are connected electrically to said electronic means to form a resistor.
Claim 21
Dependent Claim
29 words
The use of the method of any one of claims 1 to 12 or the arrangement of any one of claims 13 to 20 in a mobile communication device.
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