US6207266B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetically shielding bonding film
Assignee: Omron Corp
•
Filing: 1997-11-21
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Granted: 2001-03-27
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Expires: 2017-11-21
Abstract
Abstract Provided is bonding film in the form of web which has a high electromagnetic shielding effect for electromagnetic radiation from the front surface of a display device, and other favorable properties such as an infrared blocking property, a transparency, a invisibility and a favorable bonding property. The bonding film typically includes base film, a geometrically patterned electroconductive layer placed over the base film so as to achieve an aperture ratio of 80% of more, and a bonding layer for attaching the assembly to an object. The film may be applied to the surface of a transparent sheet member for the convenience of handling, and such an assembly has a symmetric structure so that the warping of the assembly may be minimized. The bonding film may be interposed between a pair transparent base sheets, or the bonding film may be applied over two sides a transparent base sheet. The assembly may further include an infrared blocking layer and an anti-glare layer.
Inventors
- 👤 Hisashige Kanbara
- 👤 Akishi Nakaso
- 👤 Minoru Tosaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:49
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0094; H05K9/0096; H01; H01J; H01J29/00; H01J29/86; H01J29/867; H01J29/868; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256
Claims Analysis
Total Claims: 57
Claim 1
Independent Claim
127 words
A method for making an electromagnetic shielding bonding film, comprising: forming geometrically patterned electroconductive material having a line width of 40 μm or less, a line spacing of 200 μm or more, and a line thickness of 40 μm or less over a substantially transparent base film, the geometric pattern providing an aperture ratio of 80% or more; coating a bonding agent composition over a part or an entirety of at least one side of said base film, wherein a difference in the refraction index between said transparent base film and the bonding layer formed by said coated bonding agent is 0.14 or less; said base film being prepared as a roll web, and at least most of said steps are carried out in a continuous manner.
Claim 2
Independent Claim
127 words
A method for making an electromagnetic shielding bonding film, comprising: forming geometrically patterned electroconductive material having a line width of 40 μm or less, a line spacing of 200 μm or more, and a line thickness of 40 μm or less over a substantially transparent base film, the geometric pattern providing an aperture ratio of 80% or more; coating a bonding agent composition over a part or an entirety of at least one side of said base film, wherein a difference in the refraction index between said transparent base film and the bonding layer formed by said coated bonding agent is 0.14 or less; said base film being prepared as a roll web, and at least most of said steps are carried out in a continuous manner.
Claim 3
Dependent Claim
56 words
A method for making electromagnetic shielding bonding film according to claim 1 , further comprising the step of forming an infrared blocking layer by using an infrared blocking composition having an absorption ratio of 50% or more for infrared light of 900 to 1,100 nm in wavelength at least on one side of said base film.
Claim 4
Dependent Claim
23 words
A method for making electromagnetic shielding bonding film according to claim 1 , wherein said geometric patterned electroconductive material is formed by etching.
Claim 5
Dependent Claim
26 words
A method for making electromagnetic shielding bonding film according to claim 1 , wherein said bonding agent composition has a refractive index of 1.45 to 1.60.
Claim 6
Dependent Claim
22 words
A method for making electromagnetic shielding bonding film according to claim 4 , wherein said transparent base film consists of polyethylene-terephthalate film.
Claim 7
Dependent Claim
28 words
A method for making electromagnetic shielding bonding film according to claim 1 , wherein said infrared blocking layer is incorporated in said coating of said bonding agent composition.
Claim 8
Dependent Claim
35 words
A method for making electromagnetic shielding bonding film according to claim 1 , wherein said geometric patterned electroconductive material layer consists of a member selected from a group consisting of copper, aluminum and nickel layer.
Claim 9
Dependent Claim
53 words
A method for making electromagnetic shielding bonding film according to claim 7 , wherein said geometric patterned electroconductive material has a thickness of 3 to 40 μm, and a surface of said transparent base film carrying said electroconductive material consists of a coarse surface having a surface roughness of 1 μm or more.
Claim 10
Dependent Claim
25 words
A method for making electromagnetic shielding bonding film according to claim 7 , wherein said electroconductive material consists of copper which has a darkened surface.
Claim 11
Dependent Claim
22 words
A method for making electromagnetic shielding bonding film according to claim 1 , wherein said electroconductive material consists of paramagnetic metallic material.
Claim 12
Dependent Claim
24 words
A display device using electromagnetic shielding bonding film which is made by the method according to any one of claims 1 - 10 .
Claim 13
Dependent Claim
25 words
An electromagnetic shielding assembly incorporating electromagnetic shielding bonding film which is made by the method according to any one of claims 1 - 10 .
Claim 14
Dependent Claim
98 words
A bonding film which has an optically transparent and electromagnetically shielding property, comprising: a substantially transparent base film; geometrically patterned electroconductive material formed at least on one side of said transparent base film; a bonding layer placed at least partly on one side of said base film; wherein said geometric patterned electroconductive material has a line width of 40 μm or less, a line spacing of 200 μm or more, and a line thickness of 40 μm or less; and a difference in refraction index between said transparent base film and said bonding layer is 0.14 or less.
Claim 15
Dependent Claim
98 words
A bonding film which has an optically transparent and electromagnetically shielding property, comprising: a substantially transparent base film; geometrically patterned electroconductive material formed at least on one side of said transparent base film; a bonding layer placed at least partly on one side of said base film; wherein said geometric patterned electroconductive material has a line width of 40 μm or less, a line spacing of 200 μm or more, and a line thickness of 40 μm or less; and a difference in refraction index between said transparent base film and said bonding layer is 0.14 or less.
Claim 16
Dependent Claim
61 words
Bonding film which has an optically transparent and electromagnetically shielding property according to claim 13 , further comprising a bonding agent layer interposed between said transparent base film and said bonding layer, and differences in refraction index between said bonding agent layer and said transparent base film, and between said bonding agent layer and said bonding layer are 0.14 or less.
Claim 17
Dependent Claim
24 words
Bonding film which has an optically transparent and electromagnetically shielding property according to claim 13 , wherein said transparent film consists of polyethylene-terephthalate film.
Claim 18
Dependent Claim
34 words
Bonding film which has an optically transparent and electromagnetically shielding property according to claim 13 , wherein said electroconductive material consists of a member selected from a group consisting of copper, aluminum or nickel.
Claim 19
Dependent Claim
42 words
Bonding film which has an optically transparent and electromagnetically shielding property according to claim 16 , wherein said electroconductive material has a thickness of 3 to 40 μm, and a surface thereof bonded to said transparent film consists of a coarse surface.
Claim 20
Dependent Claim
28 words
Bonding film which has an optically transparent and electromagnetically shielding property according to claim 13 , wherein said electroconductive material consists of copper which having a darkened surface.
Claim 21
Dependent Claim
29 words
Bonding film which has an optically transparent and electromagnetically shielding property according to claim 13 , wherein said electroconductive material layer is geometrically patterned by a chemical etching process.
Claim 22
Dependent Claim
25 words
Bonding film which has an optically transparent and electromagnetically shielding property according to claim 13 , wherein said electroconductive material consists of paramagnetic metallic material.
Claim 23
Dependent Claim
47 words
Bonding film which has an optically transparent and electromagnetically shielding property according to claim 13 , wherein said bonding film is incorporated with an infrared blocking layer which has an overall infrared absorption ratio of 50% or more in a wavelength range of 900 to 1,100 nm.
Claim 24
Dependent Claim
26 words
A display device using the bonding film which has an optically transparent and electromagnetically shielding property according to any one of claims 13 to 21 .
Claim 25
Dependent Claim
27 words
An electromagnetic shielding assembly using the bonding film which has an optically transparent and electromagnetically shielding property according to any one of claims 13 to 21 .
Claim 26
Dependent Claim
112 words
An electromagnetic shielding assembly, comprising: electromagnetic shielding film, wherein said electromagnetic shielding film comprises substantially transparent plastic base film, and geometrically patterned electroconductive material formed at least on one side of said transparent base film, said geometrically patterned material having a line width of 40 μm or less, a line spacing of 200 μm or more, and a line thickness of 40 μm or less; and a pair of substantially transparent base sheets attached to either side of said transparent plastic film, said base sheets having a substantially identical thickness, and wherein a difference in the refraction index between said transparent base sheet and said transparent base film is 0.14 or less.
Claim 27
Dependent Claim
112 words
An electromagnetic shielding assembly, comprising: electromagnetic shielding film, wherein said electromagnetic shielding film comprises substantially transparent plastic base film, and geometrically patterned electroconductive material formed at least on one side of said transparent base film, said geometrically patterned material having a line width of 40 μm or less, a line spacing of 200 μm or more, and a line thickness of 40 μm or less; and a pair of substantially transparent base sheets attached to either side of said transparent plastic film, said base sheets having a substantially identical thickness, and wherein a difference in the refraction index between said transparent base sheet and said transparent base film is 0.14 or less.
Claim 28
Dependent Claim
41 words
An electromagnetic shielding assembly according to claim 24 , wherein said geometric patterned electroconductive material has a line width of 25 μm or less, a line spacing of 500 μm or more, and a line thickness of 18 μm or less.
Claim 29
Dependent Claim
18 words
An electromagnetic shielding assembly according to claim 24 , wherein said transparent base film consists of polyethylene-terephthalate film.
Claim 30
Dependent Claim
36 words
An electromagnetic shielding assembly according to claim 26 , wherein said electroconductive material has a thickness of 3 to 18 μm, and a surface thereof bonded to said transparent base film consists of a coarse surface.
Claim 31
Dependent Claim
23 words
An electromagnetic shielding assembly according to claim 26 , wherein said electroconductive material consists of copper which at least has a darkened surface.
Claim 32
Dependent Claim
27 words
An electromagnetic shielding assembly according to claim 24 , wherein said electroconductive material consists of a member selected from a group consisting of copper, aluminum and nickel.
Claim 33
Dependent Claim
26 words
An electromagnetic shielding assembly according to claim 24 , wherein said electroconductive material is geometrically patterned on said transparent base film by a chemical etching process.
Claim 34
Dependent Claim
18 words
An electromagnetic shielding assembly according to claim 24 , wherein said electroconductive material consists of paramagnetic metallic material.
Claim 35
Dependent Claim
28 words
An electromagnetic shielding assembly according to claim 24 , further comprising a bonding layer formed at least partly at least on one side of said electromagnetic shielding film.
Claim 36
Dependent Claim
19 words
An electromagnetic shielding assembly according to claim 24 , wherein said transparent base sheets are made of polymethylmethacrylate (PMMA).
Claim 37
Dependent Claim
18 words
A display device using the electromagnetic shielding assembly according to any one of claims 24 - 33 .
Claim 38
Dependent Claim
108 words
An electromagnetic shielding assembly, comprising: a substantially transparent base sheet; substantially transparent base film placed on each side of said base sheet; said base film placed at least on one side of said base sheet consisting of electromagnetic shielding film, wherein said electromagnetic shielding film comprises geometrically patterned electroconductive material having a line width of 40 μm or less, a line spacing of 200 μm or more, and a line thickness of 40 μm or less; and a bonding layer for attaching a pair of mutually adjoining members, wherein the difference in the refraction index between said transparent base sheet and said transparent base film 0.14 or less.
Claim 39
Dependent Claim
108 words
An electromagnetic shielding assembly, comprising: a substantially transparent base sheet; substantially transparent base film placed on each side of said base sheet; said base film placed at least on one side of said base sheet consisting of electromagnetic shielding film, wherein said electromagnetic shielding film comprises geometrically patterned electroconductive material having a line width of 40 μm or less, a line spacing of 200 μm or more, and a line thickness of 40 μm or less; and a bonding layer for attaching a pair of mutually adjoining members, wherein the difference in the refraction index between said transparent base sheet and said transparent base film 0.14 or less.
Claim 40
Dependent Claim
41 words
An electromagnetic shielding assembly according to claim 35 , wherein said geometric patterned electroconductive material has a line width of 25 μm or less, a line spacing of 500 μm or more, and a line thickness of 18 μm or less.
Claim 41
Dependent Claim
27 words
An electromagnetic shielding assembly according to claim 35 , wherein said electroconductive material consists of a member selected from a group consisting of copper, aluminum and nickel.
Claim 42
Dependent Claim
36 words
An electromagnetic shielding assembly according to claim 37 , wherein said electroconductive material has a thickness of 3 to 18 μm, and a surface thereof bonded to said transparent base film consists of a coarse surface.
Claim 43
Dependent Claim
21 words
An electromagnetic shielding assembly according to claim 37 , wherein said electroconductive material consists of copper which has a darkened surface.
Claim 44
Dependent Claim
26 words
An electromagnetic shielding assembly according to claim 35 , wherein said electroconductive material is geometrically patterned on said transparent base film by a chemical etching process.
Claim 45
Dependent Claim
18 words
An electromagnetic shielding assembly according to claim 35 , wherein said electroconductive material consists of paramagnetic metallic material.
Claim 46
Dependent Claim
29 words
An electromagnetic shielding assembly according to claim 35 , wherein said base film placed at least on one side of said base sheet comprises an anti-glare or anti-reflective layer.
Claim 47
Dependent Claim
28 words
An electromagnetic shielding assembly according to claim 35 , wherein said base film placed at least on one side of said base sheet comprises an infrared blocking layer.
Claim 48
Dependent Claim
29 words
An electromagnetic shielding assembly according to claim 35 , wherein said base film is placed over the two sides of said transparent base sheet by a roll laminating method.
Claim 49
Dependent Claim
18 words
An electromagnetic shielding assembly according to claim 35 , wherein said transparent base film consists of polyethylene-terephthalate film.
Claim 50
Dependent Claim
19 words
An electromagnetic shielding assembly according to claim 35 , wherein said transparent base sheet is made of polymethylmethacrylate (PMMA).
Claim 51
Dependent Claim
18 words
A display device using the electromagnetic shielding assembly according to any one of claims 35 - 46 .
Claim 52
Independent Claim
151 words
A method for making an electromagnetic shielding bonding film, comprising: forming geometrically patterned electroconductive material having a line width of 40 μm or less, a line spacing of 200 μm or more, and a line thickness of 40 μm or less over a substantially transparent base film, the geometric pattern providing an aperture ratio of 80% or more, wherein said transparent base film is at least one member selected from the group consisting of polyesters, polyolefins, vinyl resins, polysulfone, polyethersulfone, polycarbonate, polyamide, polyimide and acrylic resins having a visible light transmission factor of 70% or more; coating a bonding agent composition over a part or an entirety of at least one side of said base film, wherein a difference in the refraction index between said transparent base film and the bonding layer formed by said coated bonding agent is 0.14 or less; said base film being prepared as a roll web.
Claim 53
Independent Claim
151 words
A method for making an electromagnetic shielding bonding film, comprising: forming geometrically patterned electroconductive material having a line width of 40 μm or less, a line spacing of 200 μm or more, and a line thickness of 40 μm or less over a substantially transparent base film, the geometric pattern providing an aperture ratio of 80% or more, wherein said transparent base film is at least one member selected from the group consisting of polyesters, polyolefins, vinyl resins, polysulfone, polyethersulfone, polycarbonate, polyamide, polyimide and acrylic resins having a visible light transmission factor of 70% or more; coating a bonding agent composition over a part or an entirety of at least one side of said base film, wherein a difference in the refraction index between said transparent base film and the bonding layer formed by said coated bonding agent is 0.14 or less; said base film being prepared as a roll web.
Claim 54
Dependent Claim
43 words
A method for making electromagnetic shielding bonding film according to claim 48 , wherein said transparent base film is at least one member selected from the group consisting of polyethylene terephthalate (PET), polyethylene napthalate, polyethylene, polypropylene, polystyrene, EVA, polyvinyl chloride and polyvinylidene chloride.
Claim 55
Dependent Claim
36 words
A method for making electromagnetic shielding bonding film according to claim 49 , wherein said transparent base film is at least one member selected from the group consisting of polyethylene terephthalate (PET), polyethylene napthalate, and polyethylene.
Claim 56
Dependent Claim
23 words
A method for making electromagnetic shielding bonding film according to claim 50 , wherein said transparent base film does not contain a filler.
Claim 57
Dependent Claim
27 words
A method for making electromagnetic shielding bonding film according to claim 50 , wherein at least most of said steps are carried out in a continuous manner.
References Cited (Backward Citations)
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JPH05327274A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-03-26 | 2004-09-25 | 2005-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-03-26 | 2008-09-25 | 2009-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-03-26 | 2012-09-25 | 2013-03-27 | $7700.00 | Window Closed / Lapsed |