KR20160089199A - Transparent electrode film that put the OCA and the heat-resistant protective film - Google Patents

Transparent electrode film that put the OCA and the heat-resistant protective film Download PDF

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Publication number
KR20160089199A
KR20160089199A KR1020150008865A KR20150008865A KR20160089199A KR 20160089199 A KR20160089199 A KR 20160089199A KR 1020150008865 A KR1020150008865 A KR 1020150008865A KR 20150008865 A KR20150008865 A KR 20150008865A KR 20160089199 A KR20160089199 A KR 20160089199A
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KR
South Korea
Prior art keywords
film
heat
oca
resistant protective
transparent electrode
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KR1020150008865A
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Korean (ko)
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배종오
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(주)맥스필름
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Priority to KR1020150008865A priority Critical patent/KR20160089199A/en
Publication of KR20160089199A publication Critical patent/KR20160089199A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means

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  • Laminated Bodies (AREA)
  • Non-Insulated Conductors (AREA)

Abstract

The present invention provides OCA and heat-resistant protective film when fabricating a transparent electrode film used in a touch panel of a tablet PC or a smart phone to prevent the surface from being damaged when the ITO film is heat-treated or attached to a touch screen panel And a transparent electrode film to which the OCA and the heat-resistant protective film are adhered, the hard-coating layer being bonded to both sides of the PET film; An undercoat layer formed on one of the hard coat layers adhered to the PET film; An ITO film adhered to one surface of the undercoat layer; An OCA film formed on the other of the hard coating layers adhered to the PET film; And an OCA and a heat-resistant protective film attached to one side of the OCA film to prevent the surface of the ITO film in a heat treatment process. The transparent electrode film used in a touch panel of a tablet PC or a smart phone may be manufactured using a sensor OCA and heat-resistant protective film are installed at the time of heat treatment of the ITO film and when it is attached to the touch screen panel, it is effective to prevent the surface damage. In addition, it reduces the unnecessary process and improves the productivity by simplifying the work .

Description

OCA and a transparent electrode film having a heat-resistant protective film (Transparent electrode film that puts the OCA and the heat-resistant protective film)

The present invention relates to a transparent electrode film having OCA and a heat-resistant protective film. When a transparent electrode film used for a touch panel of a tablet PC or a smart phone is manufactured using a sensor, an OCA film is provided to heat- And a transparent electrode film having an OCA and a heat-resistant protective film for preventing damage to the surface when attached to a touch screen panel.

A transparent conductive film is a film formed by laminating a transparent conductive layer on the surface of a synthetic resin film. The transparent conductive film is used as an electrode of a touch screen panel and an electrode of an optical display.

For example, in a touch screen panel, a transparent conductive glass plate in which indium tin oxide (ITO) is attached by a method such as sputtering, and a transparent conductive glass plate having relatively high heat resistance and mechanical rigidity and having a small dimensional change A transparent conductive film, in which ITO is attached by a method such as sputtering, to a synthetic resin film such as a terephthalate (hereinafter referred to as PET) film, may be arranged so as to face each other through a spacer.

In addition, a transparent conductive film (hereinafter referred to as an ITO film) may be attached to a glass plate using OCA, and a separate ITO film opposed thereto may be combined to form a touch screen panel.

In order to form such a touch screen panel, first, the work of making an ITO film should be preceded, and subsequently, an operation for forming a necessary conductive pattern by processing the ITO film should be performed.

Typically, ITO film is produced by a manufacturer in which a layer of ITO is formed on a PET film by a sputtering lamination method and supplied to a touch screen panel maker in the form of a roll. A manufacturer of a touch screen panel cuts an ITO film in a size suitable for a process and forms a conductive pattern capable of forming a plurality of touch screen panels on one cut ITO film through a normal patterning process and cuts the ITO film .

The ITO film can be classified according to the layer structure of the PET film as a base material, and a considerable number of conventional ITO film base materials are not made of a single layer but are made of two layers of PET bonded with OCA. On the other hand, each PET layer also has several coatings formed before or after bonding to OCA, and an ITO transparent conductive layer is laminated on the thus-formed substrate by a sputtering method.

1, a conventional transparent conductive film is formed by forming a hard coat layer 20 on both sides of a PET layer 10 and forming a hard coat layer 20 on one side of both sides of the PET layer 10, An undercoat layer 30 is formed, and an ITO film 40 is formed on one surface of the undercoat layer 30.

An adhesive layer 50 is formed on one side of the hard coat layer 20 formed on the other side of the PET layer 10 and a heat resistant protective film 60 is formed on one side of the adhesive layer 50.

The heat-resistant protective film 60 is heated at 130 ° C. to 150 ° C. for 45 to 90 minutes in order to crystallize the ITO film when the transparent conductive film is manufactured by a sensor. In this case, the roll- Is used to prevent damage to the surface of the ITO film 40 when heat treatment is performed through the ITO film 40.

After the heat treatment, the heat-resistant protective film 60 is peeled off together with the adhesive layer 50, and an OCA film (not shown) is formed on one side of the hard coat layer 20 from which the ITO film 40 and the adhesive layer 50 have been removed (Not shown), and the touch screen panel maker joins other parts (WINDOW GLASS, ITO FILM, LCD, etc.).

After the heat treatment process is completed in the state that the adhesive layer 50 is formed and the heat resistant protective film 60 is attached to the adhesive layer 50, the OCA film is attached after removing the heat resistant protective film 60 and the adhesive layer 50 The process is complicated and the productivity is lowered and the manufacturing cost is increased.

In addition, since the adhesive layer 50 is integrally formed to adhere the heat-resistant protective film 60, there is a problem in that unnecessary materials are consumed and the production cost of the product is increased.

Korean Patent Publication No. 2011-05078 (Published on Jan. 17, 2011)

The present invention provides an OCA and a transparent electrode film with a heat-resistant protective film, which can reduce the unnecessary processes and improve the productivity through simplification of work and reduce the production cost of the product by not using unnecessary materials The purpose is to do.

According to an aspect of the present invention, there is provided a PET film comprising: a PET film; A hard coating layer adhered to both sides of the PET film; An undercoat layer formed on one of the hard coat layers adhered to the PET film; An ITO film adhered to one surface of the undercoat layer; An OCA film formed on the other of the hard coating layers adhered to the PET film; And a heat-resistant protective film adhered to one side of the OCA film and peeled off after completion of the heat-treatment fixation.

The hard coating layer of the present invention is characterized in that the PET film is prepared by mixing monomers as a diluent and resins as a light stabilizer and then performing wet coating.

The undercoat layer of the present invention is characterized in that it forms a plurality of layers having different refractive indices to cancel the refractive index difference.

The present invention is characterized in that when the ITO film is adhered to a window glass, the OCA film remains attached, and the heat-resistant protective film is attached in a state of being removed.

The present invention provides OCA and heat-resistant protective film when fabricating a transparent electrode film used in a touch panel of a tablet PC or a smart phone to prevent the surface from being damaged when the ITO film is heat-treated or attached to a touch screen panel .

Further, the present invention has the effect of reducing the unnecessary processes and improving the productivity by simplifying the operation.

The present invention also has the effect of reducing the production cost of the product by not using unnecessary materials.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the constitution of a conventional transparent conductive film. Fig.
2 is a view showing the structure of a transparent electrode film to which OCA and a heat-resistant protective film according to the present invention are attached.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for similar elements in describing each drawing. The terms first, second, etc. may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, the term "and / or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be construed as ideal or overly formal in meaning unless explicitly defined in the present application Should not.

The specific terminology used in the following description is provided to aid understanding of the present invention, and the use of such specific terminology may be changed into other forms without departing from the technical idea of the present invention.

Hereinafter, the transparent electrode film with OCA and heat-resistant protective film according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a view showing the structure of a transparent electrode film with OCA and heat-resistant protective film according to the present invention.

As shown in FIG. 2, the transparent electrode film with OCA and heat-resistant protective film according to the present invention has a hard coating layer 200 formed on both sides of a PET film 100.

An undercoat layer 030 is formed on one surface of the hard coat layer 200 formed on both sides of the PET film 100 and an ITO film 400 is formed on one surface of the undercoat layer 300.

An OCA film 500 is disposed on one side of the hard coating layer 200 formed on one side of the PET film 100.

A heat-resistant protective film 600 for protecting the ITO film 400 is formed on one side of the OCA film 500.

The PET film 100 may be used alone or as a mixture of two or more thereof. The PET film 100 may be used in the form of a single film or a laminated film.

The hard coating layer 200 is made of a main component and a thinner is used as a diluent, and a resin is mixed with the light-curing resin to form a coating, followed by wet coating the PET film 100. In addition, the hard coating layer 200 serves to electrically insulate and improve the transmittance.

The ITO film 400 is a transparent conductive film having electrical conductivity, and is a film made of a compound of indium and tin oxide (In2O3-SnO2 compound), and is mainly manufactured by a sputtering method.

In order to lower the resistance value of the touch screen panel, the ITO film 400 is thickened to a certain thickness. In order to minimize the refractive index difference between the layers, the index matching is performed.

In the undercoat layer 300 formed between the ITO film 400 and the hard coat layer 200, various layers having different refractive indexes are formed to offset the refractive index difference.

In addition, the OCA film 500 is transparent when used for bonding with other components (such as window glass, ITO film, or LCD), and has an adhesive function.

The transparent electrode film having the OCA and the heat-resistant protective film according to the present invention as described above is formed by first forming a hard coat layer 200 on both sides of the PET film 100, An ITO film 400 is formed.

The ITO film has a thickness of 30 nm to 60 nm, the PET film layer has a thickness of 23 um to 188 um, and the OCA layer has a thickness of 20 um to 125 um.

The undercoat layer 300 is formed between the hard coat layer 200 and the ITO film 400 to offset the difference in refractive index.

The OCA film 500 is formed on the hard coating layer 200 formed on the other side of the PET film 100.

In the state where the above-described fabrication process is completed, a heat treatment process is performed to crystallize the ITO film 100, and the heat treatment is performed by a roll-to-roll process.

The heat treatment of the ITO film 400 is performed at a temperature of 130 ° C. to 150 ° C. for about 45 minutes to about 90 minutes. At this time, the surface of the ITO film 400 is damaged by the heat-resistant protective film 600 Protect.

After the heat treatment process is completed and the required process is further performed, the OCF film 500 is removed without removing the heat-resistant protective film 600. In this state, only the heat-resistant protective film is removed and other parts (WINDOW GLASS or ITO FILM Or LCD or the like).

Conventionally, a hard coating layer 20 is formed on both sides of the PET film 10, an undercoat layer 20 and an ITO film 40 are sequentially formed on one side of the hard coating layer 20, and the undercoat layer 30 The heat-resistant protective film 60 was adhered in the state that the adhesive layer 50 was formed on one side of the hard coat layer 20 on the other side where the heat-resistant protective film 60 was formed. Then, after the necessary process is further performed, the heat-resistant protective film 60 is removed together with the adhesive layer 50, and the hard coat layer 20 from which the adhesive layer 50 and the heat- There is a problem in that productivity is lowered because at least two steps are further performed than the process of producing the transparent electrode film with OCA and heat-resistant protective film of the present invention.

There is an advantage that the productivity of the transparent electrode film with the OCA and the heat-resistant protective film of the present invention is improved because the process of at least two stages is reduced in comparison with the process of producing the conventional transparent conductive film.

As described above, since the process of producing the transparent electrode film with the OCA and the heat-resistant protective film of the present invention is reduced by two or more steps compared with the conventional process, productivity is increased, and the conventional adhesive layer is further formed There is an advantage that the unit price of the transparent electrode film with OCA and heat-resistant protective film is lowered.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

100: PET film
200: hard coat layer
300: undercoat layer
400: ITO film
500: OCA film
600: Heat-resistant protective film

Claims (4)

A PET film (100);
A hard coating layer 200 adhered to both sides of the PET film 100;
An undercoat layer 300 formed on any one of the hard coat layer 200 bonded to the PET film 100;
An ITO film 400 adhered to one surface of the undercoat layer 300;
An OCA film 500 formed on another one of the hard coating layers 200 adhered to the PET film 400;
A heat-resistant protective film 600 attached to one side of the OCA film 500 to prevent the surface of the ITO film 400 during a heat treatment process;
And a transparent electrode film having a heat-resistant protective film attached thereto.
The method according to claim 1,
The hard coating layer (200)
As the diluting agent for the PET film 100, a monomer is used,
A transparent electrode film with a heat-resistant protective film, characterized in that the resin is mixed with a photocatalytic agent to form a coating, followed by wet coating. The method according to claim 1,
The undercoat layer (300)
Wherein the transparent electrode film is formed of a plurality of layers having different refractive indexes to cancel a refractive index difference.
The method according to claim 1,
When the touch screen panel maker attaches the other parts (WINDOW GLASS or ITO FILM or LCD) and the ITO film 400, the heat-resistant protective film 600 is removed, and the OCA film 500 is attached to the other parts A window glass or an ITO film or a liquid crystal display (LCD).
KR1020150008865A 2015-01-19 2015-01-19 Transparent electrode film that put the OCA and the heat-resistant protective film KR20160089199A (en)

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KR1020150008865A KR20160089199A (en) 2015-01-19 2015-01-19 Transparent electrode film that put the OCA and the heat-resistant protective film

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200109897A (en) * 2019-03-15 2020-09-23 주식회사 디케이티 The method for fabricating a transparent electrode device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110005078A (en) 2009-07-09 2011-01-17 (주)맥스필름 Manufacturing method for touch panel film

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110005078A (en) 2009-07-09 2011-01-17 (주)맥스필름 Manufacturing method for touch panel film

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200109897A (en) * 2019-03-15 2020-09-23 주식회사 디케이티 The method for fabricating a transparent electrode device

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