Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2001-11-21
2004-06-01
McDonald, Rodney G. (Department: 1753)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C428S001300, C428S001320, C428S001520, C428S447000, C428S448000, C428S450000, C428S451000
Reexamination Certificate
active
06744425
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a transparent electroconductive film having a polymer film and a transparent electroconductive thin film formed thereon.
BACKGROUND OF THE INVENTION
A resistive film-type touch panel is widely used as an input unit for a household appliance or a portable terminal. When a user pushes a part of the touch panel or draws with a specialized pen on a part of the touch panel, the part comes into contact with an opposing electrode, so that the portion and the electrode are electrically connected and a signal is inputted.
A typical resistive film-type touch panel has a lower electrode
3
′ made up of a transparent electroconductive thin film
2
′ laminated on a glass plate
1
′, an upper electrode
6
′ made up of a transparent electroconductive thin film
5
′ formed on a polymer film
4
′, and spacers
7
′ interposed between the transparent electroconductive thin films
2
′ and
5
′ as shown in FIG.
2
. Pressing the display surface of the upper electrode
6
′ with a finger or a pen makes the upper electrode
6
′ and the lower electrode
3
′ into contact with each other, so that these electrodes are electrically connected and a signal is outputted. The front of the upper electrode
6
′ is overlaid with a hard-coating layer
8
′ for protecting the polymer film
4
′.
It is necessary for the touch panel
6
′ to have good resistance to scuffing, because the touch surface on the upper electrode
6
′ is often pressed and rubbed with a finger or pen. It is necessary for the upper electrode
6
′ to spring back after the upper electrode
6
′ is pressed and rubbed with a finger or pen so as to come into contact with the lower electrode
3
′.
A front panel of a PDP (plasma display panel) is required to have anti-reflecting properties, heat ray reflecting properties (near infrared blocking capability), and electromagnetic wave shielding capability. A front panel overlaid with a multi-lamination film having layers of metal compound such as ITO (indium tin oxide) and layers of electrically conductive metal such as Ag which are formed alternately on a PET film has the heat ray reflecting properties and the electromagnetic wave shielding capability.
The laminated layers are formed by sputtering process, vacuum spraying process, ion plating process, CVD process or the like.
SUMMARY OF THE INVENTION
A transparent electroconductive film of the first aspect of the invention has a polymer film, a primary layer formed on the polymer film, and a transparent electroconductive thin film laminated on the primary layer.
The primary layer bonds the transparent electroconductive thin film to the polymer film and provides good resistance to scuffing for the transparent electroconductive film. The primary layer prevents gas generation from the polymer film during the formation of the transparent electroconductive film, whereby the transparent electroconductive film adheres firmly to the polymer film.
A transparent electroconductive film of the second aspect of the invention has a polymer film, a primary layer formed on the polymer film and a multi-lamination film composed of layers of metal compound and layers of electroconductive metal, which are formed on the primary layer.
The primary layer improves the adhesion value of the multi-lamination film and prevents peeling of the multi-lamination film. The primary layer on the polymer film prevents gas generation from the polymer film while the multi-lamination film is being formed on the primary layer, whereby the multi-lamination film properly adheres to the polymer film.
The primary layer improves the strength of the transparent electroconductive film.
According to the third aspect of the invention, there will be provided a method for manufacturing a transparent electroconductive film of the present invention having a primary layer made of silicon compound. The method has a process for forming the primary layer by coating the polymer film with the silicon compound or a liquid substance including the silicon compound.
According to the fourth aspect of the invention, there will be provided a method for manufacturing a transparent electroconductive film of the present invention having a primary layer made of silicon compound. The method has a process for forming the primary layer by adhering the silicon compound to the surface of the polymer film by a physical depositing method such as vacuum spraying method, sputtering method and ion plating method, or by a chemical depositing method such as CVD method.
According to the fifth aspect of the invention, there will be provided a method for manufacturing a transparent electroconductive film of the present invention having a primary layer made of silicon compound. The method has a process for forming the primary layer by coating the polymer film with ultraviolet curing resin including particles composed of one or more types of silicon compound selected from the group consisting of SiC
x
, SiO
x
, SiN
x
, SiC
x
O
y
, SiC
x
N
y
, SiO
x
N
y
and SiC
x
O
y
N
z
.
A touch panel of the present invention is equipped with the aforementioned transparent electroconductive film.
According to the sixth aspect, there will be provided a method for manufacturing a transparent electroconductive film of the present invention having a primary layer made of silicon composed. The method has a process for forming the primary layer by coating the polymer film with the silicon compound or a liquid substance including the silicon compound.
According to the seventh aspect, there will be provided a method for manufacturing a transparent electroconductive film of the present invention comprising a primary layer made of silicon compound, which includes a process for forming the primary layer by adhering said silicon compound to the surface of the polymer film by a physical depositing method such as vacuum spraying method, sputtering method and ion plating method, or by a chemical depositing method such as CVD method.
REFERENCES:
patent: 5986223 (1999-11-01), Kim
patent: 6495253 (2002-08-01), Koyama et al.
patent: 10-171599 (1998-06-01), None
patent: 00/16251 (2000-03-01), None
Machine translation of 10-171599.*
Database WPI, Jun. 10, 1999, Derwent Publications Ltd., London, GB; AN2001-213401, XP002189122, Noda Kazuhiro, JP2000 351170.
Database WPI, Jan. 22, 1987, Derwent Publications Ltd., London, GB; AN1988-246767, XP002189123, Bridgeston, JP63 179937.
Iwabuchi Yoshinori
Kusano Yukihiro
Nishida Mitsuhiro
Yoshikawa Masato
Bridgestone Corporation
Kanesaka & Takeuchi
McDonald Rodney G.
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