Cellular Telephone Shield for the Reduction of Electromagnetic Radiation Exposure

• US 20130035142A1
• Filed: 08/03/2012
• Published: 02/07/2013
• Est. Priority Date: 08/03/2011
• Status: Active Grant

• Current Assignee: Stephen Carmody
• Original Assignee: Stephen Carmody
• Inventors: Wolf, Erich W. II
• Granted Patent: US 9,979,425 B2
• Time in Patent Office: Days
• US Class Current: 455/566
• CPC Class Codes: B32B 15/00 Layered products comprising a layer of metal
• CPC Class Codes: B32B 2250/04 4 layers
• CPC Class Codes: B32B 2307/212 Electromagnetic interference shielding
• CPC Class Codes: B32B 27/00 Layered products comprising a layer of synthetic resin fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 3/266 characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
• CPC Class Codes: C09J 183/04 Polysiloxanes
• CPC Class Codes: C09J 2465/006 in the substrate
• CPC Class Codes: C09J 2483/00 Presence of polysiloxane
• CPC Class Codes: C09J 7/29 Laminated material metallised plastics C09J7/22
• CPC Class Codes: C09J 7/38 Pressure-sensitive adhesives [PSA]
• CPC Class Codes: H04B 1/3838 Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
• CPC Class Codes: Y10T 428/2848 Three or more layers

Abstract

A radiation shield comprises a substrate polymer layer, a conductive layer having an aperture providing access to a front face of a cellular telephone, adjacent the substrate polymer layer, and an adhesion surface adjacent the conductive layer and the front face. A radiation shield comprising a first substrate polymer layer, a conductive layer having an aperture providing access to a touch-sensitive screen of the front face, adjacent the first substrate polymer layer, a second substrate polymer layer adjacent the conductive layer, and an adhesion surface adjacent the conductive layer and the front face. At least one opening provides access to the front face.

Claims

1. A radiation shield for attachment to a cellular telephone, the cellular telephone having a front face and a set of controls, comprising:

a substrate polymer layer;

a conductive layer having an aperture providing access to the front face, adjacent the substrate polymer layer;

an adhesion surface, adjacent the conductive layer and the front face;

the radiation shield having at least one opening adjacent to the set of controls;

whereby the radiation shield attenuates electromagnetic radiation.

2. The radiation shield of claim 1, wherein the aperture further comprises a semi-transparent region having at least 84% transparency.

3. The radiation shield of claim 1, wherein the conductive layer is further comprised of a material selected from the group of indium tin oxide, silver, gold, graphene, carbon nanotubes, polyacetylene, polyphenylenen vinylene, polythophene, polyphylene sulfide, polyaniline nanofibers, and carbon nanofibers.

4. The radiation shield of claim 1, wherein the conductive layer has a sheet resistance range of about 10 ohms per square to about 15 ohms per square.

5. The radiation shield of claim 1, wherein the conductive layer has a thickness range of approximately 0.03 mm to approximately 0.06 mm.

6. The radiation shield of claim 1, wherein the substrate polymer layer has a thickness range of approximately 0.5 mm to approximately 1.0 mm.

7. The radiation shield of claim 1, wherein the substrate polymer layer is a material selected from the group of polyester, polyethylene terephthalate, glass, and polycarbonate.

8. The radiation shield of claim 2, wherein the adhesive layer has a thickness range of approximately 0.035 mm to approximately 0.065 mm.

9. The radiation shield of claim 2, wherein the adhesive layer is a 7651 transparent adhesive product.

10. A radiation shield for attachment to a cellular telephone, the cellular telephone having a front face and a touch-sensitive screen, comprising:

a first substrate polymer layer;

a conductive layer, adjacent the first substrate polymer layer;

a second substrate polymer layer, adjacent the conductive layer;

an adhesion surface, adjacent the second substrate polymer layer and the front face;

the conductive layer having an aperture adjacent the touch-sensitive screen;

whereby the radiation shield attenuates electromagnetic radiation.

11. The radiation shield of claim 10, wherein the cellular telephone has a set of controls and the radiation shield has at least one opening providing access to the set of controls.

12. The radiation shield of claim 10, wherein the first substrate polymer layer has a thickness range of approximately 0.1 mm to approximately 0.7 mm.

13. The radiation shield of claim 10, wherein the first substrate polymer layer is a material selected from the group of polyester, polyethylene terephthalate, glass, and polycarbonate.

14. The radiation shield of claim 10, wherein the second substrate polymer layer has a thickness range of approximately 0.1 mm to approximately 0.7 mm.

15. The radiation shield of claim 10, wherein the second substrate polymer layer is a material selected from the group of polyester, polyethylene terephthalate, glass, and polycarbonate.

16. The radiation shield of claim 10, wherein the conductive layer has a sheet resistance range of about 10 ohms per square to about 15 ohms per square.

17. The radiation shield of claim 10, wherein the conductive layer has a thickness range of approximately 0.03 mm to approximately 0.06 mm.

18. The radiation shield of claim 10, wherein the conductive layer is made of a material selected from the group of indium tin oxide, silver, gold, graphene, carbon nanotubes, polyacetylene, polyphenylenen vinylene, polythophene, polyphylene sulfide, polyaniline nanofibers, and carbon nanofibers.

19. The radiation shield of claim 10, wherein the adhesion surface further comprises an adhesive layer.

20. The radiation shield of claim 10, wherein the adhesive layer has a thickness range of approximately 0.035 mm to approximately 0.065 mm.

21. The radiation shield of claim 10, wherein the aperture is a semi-transparent region having at least 84% transparency.

22. A cellular telephone having a touch-sensitive screen, comprising:

a base having a set of controls;

a radiation shield, adjacent the base, having at least one opening adjacent the set of controls;

a cover adjacent the radiation shield and attached to the base;

the radiation shield further comprising;

a first substrate polymer layer;

a conductive layer having an aperture adjacent the touch-sensitive screen and adjacent the first substrate layer; and

whereby the radiation shield reduces a transmission of electromagnetic radiation.

23. The cellular telephone of claim 22, wherein the first substrate polymer layer has a thickness range of approximately 0.1 mm to approximately 0.7 mm.

24. The cellular telephone of claim 22, wherein the first substrate polymer layer is a material selected from the group of polyester, polyethylene terephthalate, glass, and polycarbonate.

25. The cellular telephone of claim 22, wherein the conductive layer has a sheet resistance range of about 10 ohms per square to about 15 ohms per square.

26. The cellular telephone of claim 22, wherein the conductive layer has a thickness range of approximately 0.03 mm to approximately 0.06 mm.

27. The cellular telephone of claim 22, wherein the conductive layer is made of a material selected from the group of indium tin oxide, silver, gold, graphene, carbon nanotubes, polyacetylene, polyphenylenen vinylene, polythophene, polyphylene sulfide, polyaniline nanofibers, and carbon nanofibers.

28. The cellular telephone of claim 22, wherein the radiation shield further comprises:

a second polymer layer adjacent the conductive layer and adjacent the touch-sensitive screen; and

wherein the aperture provides access to the touch-sensitive screen.

29. The cellular telephone of claim 28, wherein the second substrate polymer layer has a thickness range of approximately 0.1 mm to approximately 0.7 mm.

30. The cellular telephone of claim 28, wherein the second substrate polymer layer is a material selected from the group of polyester, polyethylene terephthalate, glass, and polycarbonate.

31. A method for reducing an electromagnetic radiation level produced by a cellular telephone utilizing a radiation shield comprising a substrate polymer layer;

a conductive layer having an aperture, adjacent the substrate polymer layer; and

an adhesive layer adjacent the conductive layer;

the method comprising the steps of;

removably attaching the radiation shield to the cellular telephone; and

operating the cellular telephone.

32. The method of claim 31, wherein the step of operating the cellular telephone further comprises the step of operating the cellular telephone through the aperture.

33. The method of claim 31, wherein the step of removably attaching the radiation shield to the cellular telephone further comprises the step of removably attaching the radiation shield to a front face of the cellular telephone.

34. The method of claim 31, further comprising an initial step of providing a material for the conductive layer selected from the group indium tin oxide, silver, gold, graphene, carbon nanotubes, polyacetylene, polyphenylenen vinylene, polythophene, polyphylene sulfide, polyaniline nanofibers, and carbon nanofibers.

35. The method of claim 31, further comprising an initial step of providing a sheet resistance range of about 10 ohms per square to about 15 ohms per square.