Two-dimensional image detector, active-matrix substrate, and display device

• US 6,518,557 B1
• Filed: 01/04/2000
• Issued: 02/11/2003
• Est. Priority Date: 01/14/1999
• Status: Expired due to Term

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Izumi, Yoshihiro, Teranuma, Osamu
• Primary Examiner(s): Le, Que T.
• Assistant Examiner(s): Luu, Thanh X.
• Application Number:
  US09/477,338
• Time in Patent Office: 1,134 Days
• Field of Search: 250/208.1, 250/208.2, 250/214.1, 250/214.2, 257/443, 257/448, 257/457-459, 257/676, 349/150-152, 349/187, 345/206, 345/207
• US Class Current: 250/208.1
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: H01L 27/14603 Special geometry or disposition of pixel-elements, address-lines or gate-electrodes
• CPC Class Codes: H01L 27/14609 Pixel-elements with integrated switching, control, storage or amplification elements scanning details of imagers (circuitry of solid-state image sensors H04N25/00); circuitry of imagers H04N25/70
• CPC Class Codes: H01L 27/14676 X-ray, gamma-ray or corpuscular radiation imagers measuring X-, gamma- or corpuscular radiation G01T1/00
• CPC Class Codes: H01L 27/1469 Assemblies, i.e. hybrid integration
• CPC Class Codes: H04N 5/32 Transforming X-rays cameras or camera modules for generating image signals from X-rays H04N23/30; circuitry of SSIS for transforming X-rays into image signals H04N25/30
• CPC Class Codes: H05K 2201/0108 Transparent
• CPC Class Codes: H05K 3/323 by applying an anisotropic conductive adhesive layer over an array of pads
• CPC Class Codes: H05K 3/361 Assembling flexible printed circuits with other printed circuits
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals

Abstract

An active-matrix substrate is provided with electrode wires disposed in a lattice form, a plurality of switching elements disposed respectively at intersections of the electrode wires, and connecting terminals for connecting the electrode wires to the outside, the electrode wires include metal electrodes, and at least parts of the connecting terminals have a property of transmitting light. A two-dimensional image detector includes the active-matrix substrate and the amorphous semiconductor layer, which is formed on the active-matrix substrate and has electromagnetic wave conductivity. The connecting terminals are connected with the outside via an anisotropic conductive adhesive having photo-reactivity. A display device includes the active-matrix substrate and an opposing substrate which is disposed so as to oppose the active-matrix substrate via an electro-optical medium, and the connecting terminals are connected to the outside via an anisotropic conductive adhesive having photo-reactivity.

Claims

1. A two-dimensional image detector comprising:

an active-matrix substrate which is provided with electrode wires made of metal disposed in a lattice form, a plurality of switching elements disposed respectively at intersections of the metal electrode wires, and a plurality of connecting terminals for connecting said metal electrode wires to an outside,

an amorphous semiconductor layer formed with electromagnetic wave conductivity on said active-matrix substrate, and

wherein at least parts of said connecting terminals have a property of transmitting light and are connected to an outside via an anisotropic conductive adhesive having photo-reactivity.

2. The two-dimensional image detector as defined in claim 1, wherein said amorphous semiconductor layer has selenium as a main component.

3. The two-dimensional image detector as defined in claim 1, wherein said connecting terminal is made of a material having a property of transmitting light.

4. The two-dimensional image detector as defined in claim 1, wherein said connecting terminal includes a metal terminal part and openings penetrating the metal terminal part in a thickness direction.

5. The two-dimensional image detector as defined in claim 4, wherein a metal part of said metal terminal part has a width between 2 μ

m and 50 μ

m.

6. The two-dimensional image detector as defined in claim 4, wherein said opening are formed in a lattice form.

7. The two-dimensional image detector as defined in claim 4, wherein said connecting terminal has a laminated structure consisting of a metal and a transparent conductive oxide film.

8. The two-dimensional image detector as defined in claim 1, wherein said anisotropic conductive adhesive with photo-reactivity is an anisotropic conductive adhesive which is photo-reactive to light having a wavelength according to an absorption wavelength of a material used for said active-matrix substrate and said connecting terminal.

9. The two-dimensional image detector as defined in claim 1, wherein said photo-reactive anisotropic conductive adhesive is a photo-curing anisotropic conductive adhesive.

10. The two-dimensional image detector as defined in claim 1, wherein said photo-reactive anisotropic conductive adhesive is a photo-assist anisotropic conductive adhesive which generates a radical by irradiation of light and curing is developed by a heating operation.

11. The two-dimensional image detector of claim 1, wherein at least one of said connecting terminals includes a non-transmissive portion for shielding or blocking light, and said non-transmissive portion comprises a structure in which a transparent conductive film is stacked on a metallic film.

12. The two-dimensional image detector of claim 1, wherein the metal electrode wires are non-transmissive and block light.

13. A two-dimensional image detector comprising:

an active-matrix substrate which is provided with electrode wires disposed in a lattice form, a plurality of switching elements in communication with the electrode wires, and a plurality of connecting terminals for connecting said electrode wires to an outside,

an amorphous semiconductor layer formed with electromagnetic wave conductivity on said active-matrix substrate,

wherein at least parts of said connecting terminals have a property of transmitting light and are connected to an outside via an anisotropic conductive adhesive having photo-reactivity;

wherein a plurality of said connecting terminals each include a metal terminal part and at least one opening penetrating the metal terminal part in a thickness direction; and

wherein each opening is formed with a size according to a diffraction degree of light irradiated on a surface of said connecting terminal, at the time that light is emitted from a back of a surface on which said connecting terminals are formed.

14. A two-dimensional image detector comprising:

metal electrode wires disposed in a lattice form,

a plurality of switching elements disposed respectively at intersections of said metal electrode wires,

an amorphous semiconductor layer having electromagnetic wave conductivity,

an image detecting section for detecting an electromagnetic wave image, which is emitted into said amorphous semiconductor layer, in response to a control signal inputted to said metal electrode wires,

a connecting terminal which is connected with an outside a s an input/output terminal and inputs a control signal into at least one of said electrode wires so as to detect the electromagnetic wave image emitted into the amorphous semiconductor layer and/or outputs an image signal according to an electromagnetic wave image, and

a bonding part for electrically connecting said connecting terminal to an outside,

wherein at leas t a part of said connecting terminal has a property of transmitting light, and said bonding part is made of an anisotropic conductive adhesive having photo-reactivity.

15. The two-dimensional image detector as defined in claim 14, wherein said amorphous semiconductor layer has selenium as a main component.

16. The two-dimensional image detector as defined in claim 14, wherein said connecting terminal is made of a material having a property of transmitting light.

17. The two-dimensional image detector as defined in claim 14, wherein said connecting terminal include a metal terminal part and openings penetrating the metal terminal part in a thickness direction.

18. The two-dimensional image detector of claim 14, wherein said connecting terminal includes a non-transmissive portion for shielding or blocking light, and said non-transmissive portion comprises a structure in which a transparent conductive film is stacked on a metallic film.

19. An active matrix substrate comprising:

electrode wires disposed in a lattice form,

a plurality of switching elements in communication with said electrode wires,

connecting terminals for connecting said electrode wires to an outside,

wherein said electrode wires include metal electrodes, and at least parts of said connecting terminals have a property of transmitting light;

wherein said connecting terminal includes a metal terminal part and openings defined in the metal terminal p art in a thickness direction; and

wherein each of said openings is formed with a size according to a diffraction degree of light irradiated on a surface of said connecting terminal, at the time that light is emitted from a back of a surface on which said connecting terminals are formed.

20. A display device comprising:

an active-matrix substrate which is provided with metal electrode wires disposed in a lattice form, a plurality of switching elements in communication with said metal electrode wires, and connecting terminals for connecting said metal electrode wires to an outside, and

an opposing substrate which is disposed so as to oppose said active-matrix substrate via an electro-optical medium,

wherein at least parts of said connecting terminals have a property of transmitting light and are connected to an outside via an anisotropic conductive adhesive having photo-reactivity.

21. The display device as defined in claim 20, wherein said connecting terminal is made of a material having a property of transmitting light.

22. The display device as defined in claim 20, wherein said connecting terminal includes a metal terminal part and openings penetrating the metal terminal part in a thickness direction.

23. The display device as defined in claim 22, wherein each of said openings is formed with a size according to a diffraction degree of light irradiated on a surface of said connecting terminal, at the time that light is emitted from a back of a surface on which said connecting terminals are formed.

24. The display device as defined in claim 22, wherein said metal terminal part has a metal part with a width between 2 μ

m and 50 μ

m.

25. The display device as defined in claim 22, wherein said openings are formed in a lattice form.

26. The display device as-defined in claim 22, wherein said connecting terminal has a laminated structure consisting of a metal and a transparent conductive oxide film.

27. The display device as defined in claim 20, wherein said anisotropic conductive adhesive with photo-reactivity is an anisotropic conductive adhesive which is photo-reactive to light having a wavelength according to an absorption wavelength of a material used for said active-matrix substrate and said connecting terminal.

28. The display device as defined in claim 20, wherein said photo-reactive anisotropic conductive adhesive is a photo-curing anisotropic conductive adhesive.

29. The display device as defined in claim 20, wherein said photo-reactive anisotropic conductive adhesive is a photo-assist anisotropic conductive adhesive that generates a radical by irradiation of light and curing is developed by a heating operation.

30. The display device of claim 20, wherein at least one of said connecting terminals includes a non-transmissive portion for shielding or blocking light, and said non-transmissive portion comprises a structure in which a transparent conductive film is stacked on a metallic film.