METHOD FOR MAKING AN INTERACTIVE INFORMATION DEVICE AND PRODUCT PRODUCED THEREBY

• US 20090022886A1
• Filed: 08/28/2008
• Published: 01/22/2009
• Est. Priority Date: 10/12/2000
• Status: Abandoned Application

• Current Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Original Assignee: Donnelly Corporation (Magna International Incorporated)
• Inventors: Halsey, Eugene IV, Getz, Catherine A.
• Application Number:
  US12/200,159
• Publication Number:
  US 20090022886A1
• Time in Patent Office: Days
• US Class Current: 427/109
• CPC Class Codes: C03C 17/3417 all coatings being oxide coatings
• CPC Class Codes: C03C 2218/365 Coating different sides of a glass substrate
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: H01J 29/868 Screens covering the input or output face of the vessel, e.g. transparent anti-static coatings, X-ray absorbing layers
• CPC Class Codes: H05K 1/0213 Electrical arrangements not otherwise provided for
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/26 Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension

Abstract

A method and product produced by the method for forming an interactive information device with a conductively coated panel includes forming a reduced contrast, increased light transmitting, conductively coated panel by providing a transparent substrate and applying a transparent, conductive layer on at least one surface of the substrate in a predetermined pattern with at least one area having a conductive layer thereon and a second area without a conductive layer. The method further includes applying a transparent layer of a metal oxide such that the metal oxide layer, such as silicon dioxide, overlies both areas whereby visible contrast between the areas is reduced and light transmission through the coated panel is increased. The coated panel is then attached to an electro-optic display for displaying information when electricity is applied thereto.

Claims

1. A method for making an interactive information device comprising:

forming a reduced contrast, increased light transmitting, conductively coated panel by providing a transparent substrate having first and second surfaces, applying a transparent, conductive layer on at least one surface of said first and second surfaces of said substrate in a predetermined pattern such that there is at least one area having a conductive layer thereon and an adjacent second area without a conductive layer on said one substrate surface, and applying a transparent layer of metal oxide commonly overlying both said one and said second areas of said one substrate surface including selecting said metal oxide layer to have a refractive index at the sodium D line and a thickness that, in combination, reduce optical contrast between said one area and said second area such that visible contrast between said one area and said second area is reduced and light transmission through said coated panel is increased by said layer of metal oxide that commonly overlies both said one and said second areas;

applying a transparent, conductive layer on the other of said first and second surfaces of said substrate in a predetermined pattern such that there is at least one area having a conductive layer thereon and a second area without a conductive layer on said other substrate surface and applying a transparent layer of metal oxide overlying said one and said second areas of said other substrate surface;

applying each of said transparent layers of metal oxide by a wet chemical deposition process; and

attaching said conductively coated panel to an electro-optic display for displaying information when electricity is applied thereto.

2. The method of claim 1 wherein said wet chemical deposition process is selected from the group consisting of spin coating, roll coating, meniscus coating, dip coating, spray coating and angle dependent dip coating.

3. The method of claim 1 wherein said wet chemical deposition process includes forming a coated substrate by dip coating said substrate having said transparent, conductive layers thereon in a precursor solution for a metal oxide such that said transparent layers of metal oxide are applied to both surfaces of said substrate simultaneously.

4. The method of claim 3 including curing said coated substrate by baking at a predetermined temperature for a predetermined time.

5. The method of claim 4 including chemically reducing said transparent conductive layers in an inert forming gas curing environment.

6. The method of claim 1 wherein each of said transparent, conductive layers on said substrate surfaces is applied in a predetermined pattern by depositing said conductive layers over each of said substrate surfaces and removing said conductive layers in said second area on each substrate surface by a post deletion method.

7. The method of claim 6 wherein said post deletion method is selected from the group consisting of laser ablation and chemical etching.

8. A method for making an interactive information device comprising:

forming a reduced contrast, increased light transmitting, conductively coated panel by providing a transparent substrate having first and second surfaces, applying a transparent, conductive layer on at least one surface of said first and second surfaces of said substrate in a predetermined pattern such that there is at least one area having a conductive layer thereon and an adjacent second area without a conductive layer on said one substrate surface, and applying a transparent layer of metal oxide commonly overlying both said one and said second areas of said one substrate surface including selecting said metal oxide layer to have a refractive index at the sodium D line and a thickness that, in combination, reduce optical contrast between said one area and said second area such that visible contrast between said one area and said second area is reduced and light transmission through said coated panel is increased by said layer of metal oxide that commonly overlies both said one and said second areas;

applying said transparent layer of metal oxide by a wet chemical deposition process;

attaching said conductively coated panel to an electro-optic display for displaying information when electricity is applied thereto.

9. The method of claim 8 wherein said wet chemical deposition process is selected from the group consisting of spin coating, roll coating, meniscus coating, dip coating, spray coating and angle dependent dip coating.

10. The method of claim 8 wherein said wet chemical deposition process includes forming a coated substrate by dip coating said substrate having said transparent, conductive layer thereon in a precursor solution for silicon dioxide.

11. The method of claim 10 including curing said coated substrate by baking at a predetermined temperature for a predetermined time.

12. The method of claim 11 including chemically reducing said transparent conductive layer in an inert forming gas curing environment.

13. A method for making an interactive information device comprising:

forming a reduced contrast, increased light transmitting, conductively coated panel by providing a transparent substrate having first and second surfaces, applying a transparent, conductive layer on at least one surface of said first and second surfaces of said substrate in a predetermined pattern such that there is at least one area having a conductive layer thereon and an adjacent second area without a conductive layer on said one substrate surface, and applying a transparent layer of metal oxide commonly overlying both said one and said second areas of said one substrate surface including selecting said metal oxide layer to have a refractive index at the sodium D line and a thickness that, in combination, reduce optical contrast between said one area and said second area such that visible contrast between said one area and said second area is reduced and light transmission through said coated panel is increased by said layer of metal oxide that commonly overlies both said one and said second areas;

applying said transparent, conductive layer in a predetermined pattern by depositing said conductive layer over said substrate surface and selectively removing said conductive layer in said second area by a post deletion method;

attaching said conductively coated panel to an electro-optic display for displaying information when electricity is applied thereto.

14. The method of claim 13 wherein said post deletion method is selected from the group consisting of laser ablation and chemical etching.

15. The interactive information display device produced by the method comprising:

forming a reduced contrast, increased light transmitting, conductively coated panel by providing a transparent substrate having first and second surfaces, applying a transparent, conductive layer on at least one surface of said first and second surfaces of said substrate in a predetermined pattern such that there is at least one area having a conductive layer thereon and an adjacent second area without a conductive layer on said one substrate surface, and applying a transparent layer of metal oxide commonly overlying both said one and said second areas of said one substrate surface including selecting said metal oxide layer to have a refractive index at the sodium D line and a thickness that, in combination, reduce optical contrast between said one area and said second area such that visible contrast between said one area and said second area is reduced and light transmission through said coated panel is increased by said layer of metal oxide that commonly overlies both said one and said second areas;

attaching said conductively coated panel to an electro-optic display for displaying information when electricity is applied thereto.

16. The interactive information display device produced by the method of claim 15 wherein said electro-optic display comprises a liquid crystal display.

17. The interactive information display device produced by the method of claim 16 wherein said interactive information display device comprises a touch interactive information display device.

18. The interactive information display device produced by the method comprising:

forming a reduced contrast, increased light transmitting, conductively coated panel by providing a transparent substrate having first and second surfaces, applying a transparent, conductive layer on at least one surface of said first and second surfaces of said substrate in a predetermined pattern such that there is at least one area having a conductive layer thereon and an adjacent second area without a conductive layer on said one substrate surface, and applying a transparent layer of metal oxide commonly overlying both said one and said second areas of said one substrate surface including selecting said metal oxide layer to have a refractive index at the sodium D line and a thickness within the range of about 100 Angstroms to about 50,000 Angstroms, said refractive index at the sodium D line and said thickness of said metal oxide layer, in combination, reducing optical contrast between said one area and said second area such that visible contrast between said one area and said second area is reduced and light transmission through said coated panel is increased by said layer of metal oxide that commonly overlies both said one and said second areas;

said transparent, conductive layer being applied in a predetermined pattern by one of;

a) applying a pattern of mask material to said substrate surface to mask said second area, depositing said conductive layer over said surface including over said pattern of mask material, and removing said pattern of mask material and conductive layer thereon to form said one area and said second area on said surface, and

b) depositing said conductive layer over said substrate surface and selectively removing said conductive layer in said second area by a post deletion method;

said metal oxide layer comprising at least one selected from the group consisting of silicon dioxide, tantalum oxide, zirconium oxide, titanium dioxide and tungsten oxide; and

attaching said conductively coated panel to an electro-optic display for displaying information when electricity is applied thereto.

19. The interactive information display device produced by the method of claim 18 wherein said electro-optic display comprises a liquid crystal display.

20. The interactive information display device produced by the method of claim 19 wherein said interactive information display device comprises a touch interactive information display device.

21. A method for making an interactive information device comprising:

forming a reduced contrast, increased light transmitting, conductively coated panel by providing a transparent substrate having first and second surfaces;

applying a transparent, conductive layer on said first surface of said substrate in a predetermined pattern such that there is at least one area having a conductive layer thereon and an adjacent second area without a conductive layer on said first substrate surface, and applying a transparent layer of metal oxide commonly overlying both said one and said second areas of said first substrate surface including selecting said metal oxide layer to have a refractive index at the sodium D line and a thickness within the range of about 100 Angstroms to about 50,000 Angstroms, said refractive index at the sodium D line and said thickness of said metal oxide layer, in combination, reducing optical contrast between said one area and said second area such that visible contrast between said one area and said second area is reduced and light transmission through said coated panel is increased by said layer of metal oxide that commonly overlies both said one and said second areas of said first substrate surface;

depositing said conductive layer over said first substrate surface and selectively removing said conductive layer in said second area of said first substrate surface by a post deletion method;

applying a transparent, conductive layer on said second surface of said substrate in a predetermined pattern such that there is at least one area having a conductive layer thereon and an adjacent second area without a conductive layer on said second substrate surface, and applying a transparent layer of metal oxide commonly overlying both said one and said second areas of said second substrate surface including selecting said metal oxide layer that is applied to said second substrate surface to have a refractive index at the sodium D line and a thickness within the range of about 100 Angstroms to about 50,000 Angstroms, said refractive index at the sodium D line and said thickness of said metal oxide layer applied to said second substrate surface, in combination, reducing optical contrast between said one area and said second area on said second substrate surface such that visible contrast between said one area and said second area on said second substrate surface is reduced and light transmission through said coated panel is increased by said layer of metal oxide that commonly overlies both said one and said second areas of said second substrate surface; and

attaching said conductively coated panel to an electro-optic display for displaying information when electricity is applied thereto.

22. The method of claim 21 wherein said post deletion method comprises photolithography.

23. The method of claim 22 wherein said post deletion method comprises chemical etching.

24. The method of claim 21 including depositing said conductive layer over said second substrate surface and selectively removing said conductive layer in said second area of said second substrate surface by a post deletion method.

25. The method of claim 24 wherein said post deletion method comprises photolithography.

26. The method of claim 25 wherein said post deletion method comprises chemical etching.

27. The interactive information display device produced by the method of claim 26.

28. The interactive information display device produced by the method of claim 27 wherein said electro-optic display comprises a liquid crystal display.

29. The interactive information display device produced by the method of claim 27 wherein said interactive information display device comprises a touch interactive information display device.

30. A method for making an interactive information device comprising:

forming a reduced contrast, increased light transmitting, conductively coated panel by providing a transparent substrate having first and second surfaces;

applying a transparent, conductive layer comprising indium tin oxide on said first surface of said substrate in a predetermined pattern such that there is at least one area having a conductive layer thereon and an adjacent second area without a conductive layer on said first substrate surface, and applying a transparent layer of metal oxide comprising silicon dioxide commonly overlying both said one and said second areas of said first substrate surface including selecting said metal oxide layer to have a refractive index at the sodium D line and a thickness within the range of about 100 Angstroms to about 50,000 Angstroms, said refractive index at the sodium D line and said thickness of said metal oxide layer, in combination, reducing optical contrast between said one area and said second area such that visible contrast between said one area and said second area is reduced and light transmission through said coated panel is increased by said layer of metal oxide that commonly overlies both said one and said second areas of said first substrate surface;

applying a transparent, conductive layer comprising indium tin oxide on said second surface of said substrate in a predetermined pattern such that there is at least one area having a conductive layer thereon and an adjacent second area without a conductive layer on said second substrate surface, and applying a transparent layer of metal oxide comprising silicon oxide commonly overlying both said one and said second areas of said second substrate surface including selecting said metal oxide layer that is applied to said second substrate surface to have a refractive index at the sodium D line and a thickness within the range of about 100 Angstroms to about 50,000 Angstroms, said refractive index at the sodium D line and said thickness of said metal oxide layer applied to said second substrate surface, in combination, reducing optical contrast between said one area and said second area on said second substrate surface such that visible contrast between said one area and said second area on said second substrate surface is reduced and light transmission through said coated panel is increased by said layer of metal oxide that commonly overlies both said one and said second areas of said second substrate surface;

said applying said transparent, conductive layer on said first substrate surface including depositing said conductive layer over said first substrate surface and selectively removing said transparent, conductive layer in said second area of said first substrate surface by a post deletion method wherein said post deletion method comprises photolithography and chemical etching, and including depositing said conductive layer over said second substrate surface and selectively removing said conductive layer in said second area of said second substrate surface by a post deletion method wherein said post deletion method comprises photolithography and chemical etching; and

attaching said conductively coated panel to an electro-optic display for displaying information when electricity is applied thereto.

31. The method of claim 30 including applying said metal oxide layer commonly overlying both said one and said second areas of said first substrate surface with a thickness in the range from about 100 angstroms to about 1,400 angstroms and applying said metal oxide layer commonly overlying both said one and said second areas of said second substrate surface with a thickness in the range from about 100 angstroms to about 1,400 angstroms.

32. The method of claim 31 including applying said transparent layer of metal oxide on said first substrate surface by physical vapor deposition sputter coating and including applying said transparent layer of metal oxide on said second substrate surface by physical vapor deposition sputter coating.

33. The method of claim 32 including applying said transparent, conductive layer on said first substrate surface by physical vapor deposition sputter coating and including applying said transparent, conductive layer on said second substrate surface by physical vapor deposition sputter coating.

34. The method of claim 31 including applying said metal oxide layer commonly overlying both said one and said second areas of said first substrate surface with a thickness in the range from about 100 angstroms to about 600 angstroms and applying said metal oxide layer commonly overlying both said one and said second areas of said second substrate surface with a thickness in the range from about 100 angstroms to about 600 angstroms.

35. The interactive information display device produced by the method of claim 34.

36. The interactive information display device produced by the method of claim 34 wherein said electro-optic display comprises a liquid crystal display.

37. The interactive information display device produced by the method of claim 36 wherein said interactive information display device comprises a touch interactive information display device.

38. The method of claim 34 including applying said metal oxide layer commonly overlying both said one and said second areas of said first substrate surface with a thickness of about 500 angstroms and applying said metal oxide layer commonly overlying both said one and said second areas of said second substrate surface with a thickness of about 500 angstroms.