WO2013187324A1 - 基板シートおよびタッチパネル - Google Patents
基板シートおよびタッチパネル Download PDFInfo
- Publication number
- WO2013187324A1 WO2013187324A1 PCT/JP2013/065828 JP2013065828W WO2013187324A1 WO 2013187324 A1 WO2013187324 A1 WO 2013187324A1 JP 2013065828 W JP2013065828 W JP 2013065828W WO 2013187324 A1 WO2013187324 A1 WO 2013187324A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resist layer
- layer
- resistant resist
- light
- metal wiring
- Prior art date
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Images
Classifications
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- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/42—Layered products comprising a layer of synthetic resin comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
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- 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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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0274—Optical details, e.g. printed circuits comprising integral optical means
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/09—Use of materials for the conductive, e.g. metallic pattern
- H05K1/092—Dispersed materials, e.g. conductive pastes or inks
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- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
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- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
Definitions
- the present invention relates to a substrate sheet that can be used as an electrostatic sensor such as a touch panel, and a touch panel using the substrate sheet.
- Transparent conductive polymers are used for electrodes of electrostatic sensors such as touch panels. Since this transparent conductive polymer is significantly deteriorated by light, a protective layer is formed by a resist film containing an ultraviolet absorber to cover this electrode. Such a technique is described in, for example, Japanese Patent Application Laid-Open No. 2011-192150 (Patent Document 1).
- an object of this invention is to provide the touchscreen formed using the board
- a substrate having a transparent electrode made of a conductive polymer and a metal wiring connecting the transparent electrode and the connector connecting portion on a translucent base material, and a protective layer covering the transparent electrode and the metal wiring is provided. It is a sheet, and a protective layer is a laminate in which a sulfur-resistant resist layer that prevents sulfidation of metal wiring and a light-resistant resist layer that absorbs ultraviolet rays are laminated in this order from the translucent substrate side.
- the resist sheet is a substrate sheet that is a polyurethane-polyurea resin layer.
- a sulfur-resistant resist layer that prevents sulfidation of the metal wiring and a light-resistant resist layer that absorbs ultraviolet rays are arranged in this order from the translucent substrate side. Since the protective layer made of the laminated body is provided, it is possible to prevent the transparent electrode from being deteriorated by ultraviolet rays and the metal wiring from being sulfided. Since the sulfur-resistant resist layer is a polyurethane / polyurea resin layer, the gas barrier property can be improved by containing the polyurea component, and the sulfidation of the metal wiring can be effectively prevented.
- the polyurethane / polyurea resin forming the polyurethane / polyurea resin layer has a polyisocyanate component in an amount 1.2 to 5.5 times the amount of the polyisocyanate component having an NCO group equivalent to the OH group of the polyol component. It can be set as the board
- Polyurethane / polyurea resin forming the polyurethane / polyurea resin layer has a polyisocyanate component in an amount 1.2 to 5.5 times the amount of the polyisocyanate component having an NCO group equivalent to the OH group of the polyol component. Since the resin has a urethane bond and a urea bond that are contained and cured, the metal wiring can be protected from sulfurization.
- the polyurethane / polyurea resin layer forming the polyurethane / polyurea resin layer may be a resin obtained by reaction-curing a raw material having an NCO group / OH group value of 1.2 to 5.5.
- the polyurethane / polyurea resin forming the polyurethane / polyurea resin layer is a resin obtained by reaction curing of a raw material having an NCO group / OH group value of 1.2 to 5.5, so that the amount of isocyanate components increases and urethane is increased.
- a polyurethane / polyurea resin layer having a urea bond in addition to the bond is formed. Therefore, the crosslink density of the resin can be increased as compared with the case where no urea bond is formed.
- the distance between the molecular chains can be made close. Therefore, it is easy to prevent the sulfur component from entering, and the metal wiring can be protected from sulfidation degradation. Therefore, it can be set as the protective layer excellent in sulfidation resistance.
- the sulfur-resistant resist layer can be a resin layer having a higher crosslinking density than the light-resistant resist layer. Since the sulfur-resistant resist layer has a higher crosslinking density than the light-resistant resist layer, the sulfur resistance can be improved.
- a substrate sheet in which the light-resistant resist layer is a polyurethane resin layer can be used. Since the light-resistant resist layer is a polyurethane-based resin layer, the adhesion with the sulfur-resistant resist layer can be improved.
- a touch panel can be manufactured using said board
- the transparent electrode made of a conductive polymer and the metal wiring can be protected from deterioration or sulfurization due to ultraviolet rays or sulfur components.
- FIG. 2 is a sectional view taken along line SA-SA in FIG.
- the substrate sheet 11 of the present embodiment includes a light-transmitting base material 12, a transparent electrode 13 made of a transparent conductive polymer formed on the base material 12, and It has a layer configuration including at least a metal wiring 14 for connecting the transparent electrode 13 to an external electric circuit, and a protective layer 15 covering the transparent electrode 13 and the metal wiring 14, and is a capacitance type. It can be used as a touch panel.
- the substrate 12 is formed of a highly transparent resin film, for example, polyethylene terephthalate (PET) resin, polyethylene naphthalate (PEN) resin, polycarbonate (PC) resin, methacryl (PMMA) resin, polypropylene (PP) resin. , Polyurethane (PU) resin, polyamide (PA) resin, polyethersulfone (PES) resin, polyetheretherketone (PEEK) resin, triacetylcellulose (TAC) resin, cycloolefin polymer (COP), etc. be able to.
- the substrate 12 may be subjected to a surface treatment by providing a primer layer that enhances adhesion to the conductive polymer, a surface protective layer, an overcoat layer for the purpose of preventing static charge, or the like.
- a conductive polymer that can form a transparent layer is used as the material of the conductive polymer that becomes the transparent electrode 13.
- a transparent conductive polymer include polyparaphenylene or polyacetylene, PEDOT-PSS (poly-3,4-ethylenedioxythiophene-polystyrenesulfonic acid), and the like.
- Both the sulfur-resistant resist layer 17 and the light-resistant resist layer 16 have a high light transmittance in the visible light region, and these layers are transparent or almost transparent. Further, since the light-resistant resist layer 17 blocks ultraviolet rays, the light transmittance in the ultraviolet region (wavelength less than 400 nm) is almost zero.
- the metal wiring 14 connects the connector connection portion 18 connected to an electric circuit such as an information processing device (not shown) provided outside the substrate sheet 11 and the transparent electrode 13.
- the material of the metal wiring 14 is preferably formed from, for example, a conductive paste or a conductive ink containing a highly conductive metal such as copper, aluminum, silver, or an alloy containing these metals. Further, among these metals and alloys, silver wiring is preferable because it has high conductivity and is less likely to be oxidized than copper.
- the protective layer 15 is a layer that covers the transparent electrode 13 and the metal wiring 14, and is a layer formed by laminating a light-resistant resist layer 16 and a sulfide-resistant resist layer 17.
- the transparent electrode 13 and the metal wiring 14 are covered with a sulfur-resistant resist layer 17, and the light-resistant resist layer 16 is covered on the sulfur-resistant resist layer 17.
- the light-resistant resist layer 16 is a layer for protecting the substrate sheet 11 from scratches and the like, and protecting the transparent conductive polymer from ultraviolet rays, and is a layer containing an ultraviolet absorber in a transparent resin.
- a transparent resin a hard resin is selected.
- an acrylic resin, a urethane resin, an epoxy resin, a polyolefin resin, and other resins can be used, but a raw material composition comprising a polyisocyanate component and a polyol component. It is preferable to use a polyurethane resin layer obtained by curing the product. This is because the hardness can be easily adjusted and the strength is high.
- aliphatic diisocyanate, alicyclic polyisocyanate, and arylaliphatic polyisocyanate are used as the polyisocyanate component in the raw material composition in consideration of weather resistance including yellowing. It is particularly preferred.
- examples of the aliphatic diisocyanate include hexamethylene diisocyanate; examples of the alicyclic polyisocyanate include dicyclohexylmethane diisocyanate, cyclohexyl diisocyanate, isophorone diisocyanate; examples of the aryl aliphatic polyisocyanate include xylylene diisocyanate; Adduct type, burette type, isocyanurate type, and urethane imine type polyisocyanates can be used.
- Aromatic polyisocyanates such as 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 4,4′-diphenylmethane diisocyanate, 2,4′-diphenylmethane diisocyanate, para-phenylene diisocyanate; and their adduct types It is also possible to use isocyanates such as burette type, isocyanurate type and uretonimine type polyisocyanates.
- the polyol component is obtained by adding low molecular polyols such as ethylene glycol, propylene glycol, glycerin, etc .; and polyphenols by adding alkylene oxide such as diethylene oxide, propylene oxide, 1,2-butadiene oxide, styrene oxide, etc.
- the polyether polyol include polyester polyols obtained by a dehydration condensation reaction between the low molecular polyols and dicarboxylic acids such as adipic acid and phthalic acid.
- acrylic polyol, polycarbonate polyol, polyurethane polyol, polycaprolactone polyol and the like can be mentioned.
- the light resistant resist layer 16 contains an ultraviolet absorber. Various ultraviolet absorbers such as salicylic acid, benzophenone, benzotriazole, and hindered amine can be used as the ultraviolet absorber.
- the average light transmittance of the light-resistant resist layer 16 in the visible light region of 400 nm to 800 nm is preferably 80% or more, and more preferably 85% or more.
- the thickness of the light resistant resist layer 16 is usually 3 ⁇ m to 10 ⁇ m, preferably 6 ⁇ m to 8 ⁇ m. The reason is that if it is too thick, the flexibility is poor, and if it is too thin, the effect of light resistance is weakened.
- the sulfidation resistant resist layer 17 is a layer mainly for preventing sulfidation of the metal wiring 14, and is formed of a polyurethane / polyurea resin layer.
- the polyurethane-polyurea resin forming the polyurethane-polyurea resin layer is a resin containing a polyisocyanate component in an amount larger than the amount of polyisocyanate component having an equivalent NCO group that reacts with the OH group of the polyol component. is there.
- the polyurethane-polyurea resin is a resin having a urea bond in addition to a urethane bond, and is a resin having a higher crosslink density than a polyurethane resin having a urethane bond.
- Polyurethane / polyurea-based resin raw material containing a polyol component and a polyisocyanate component contains 1.2 to 5.5 times the amount of polyisocyanate having an NCO group equivalent to the OH group of the polyol component. It is preferable that the component is contained. If it is less than 1.2 times, the ratio of urea bonds decreases and the resistance to sulfidation becomes insufficient. On the other hand, if it is more than 5.5 times, the number of urea bonds increases, so that the sulfur-resistant resist layer 17 tends to be hard and brittle.
- Polyurethane / polyurea resins include (a) a copolymer in which a polyurethane polymer and a polyurea polymer are linked, (b) a mixture in which the polyurethane polymer and the polyurea polymer exist independently, and (a) The resin in any state of the mixture mixed with (b) is included.
- the same components as the polyisocyanate component and the polyol component in the raw material composition for forming the light-resistant resist layer 16 can be used.
- the sulfidation resistant resist layer 17 can be formed. Therefore, the adhesion between the light-resistant resist layer 16 and the sulfide-resistant resist layer 17 is high, and the protective effect of the transparent electrode 13 and the metal wiring 14 is enhanced.
- the sulfur-resistant resist layer 17 is directly laminated on the metal wiring 14, it is possible to reliably prevent the intrusion of sulfur components that would reach the metal wiring 14 through other layers.
- the average light transmittance of the sulfide-resistant resist layer 17 in the visible light region of 400 nm to 800 nm is preferably 80% or more, and more preferably 85% or more.
- the thickness of the sulfidation resistant resist layer 17 is usually 3 ⁇ m to 10 ⁇ m, preferably 6 ⁇ m to 8 ⁇ m. The reason is that if it is thicker than 10 ⁇ m, the flexibility is poor, and if it is thinner than 3 ⁇ m, the action of sulfidation resistance is weak, and if it is 6 ⁇ m to 8 ⁇ m, it is flexible and the sulfidation resistance is strong.
- the protective layer 15 in which the light-resistant resist layer 16 and the sulfide-resistant resist layer 17 are laminated has the following advantages.
- the content of the isocyanate component compared to the case of the two layers It is necessary to increase the amount of urea bonds. This is because if the same amount of isocyanate component as that in the case of two layers is contained, the crosslink density of the protective layer is lowered, and the sulfidation resistance is deteriorated. That is, in the case of one layer, the polyisocyanate component must be increased more than in the case of two layers, and there arises a disadvantage that the protective layer becomes hard. In addition, the cost of the raw material becomes high.
- the sulfur-resistant resist layer 17 is provided on the substrate 12 side and the light-resistant resist layer 16 is provided on the outside, the sulfur component entering from the side surface side of the substrate 12 can be effectively blocked. This is more preferable than the case where the light-resistant resist layer 16 is provided on the material 12 side and the sulfide-resistant resist layer 17 is provided outside.
- the transparent electrode 13 and the metal wiring 14 should just be provided in a part of base material 12 surface, and may be provided in the whole surface. Moreover, you may provide in the front and back both surfaces of the base material 12 as needed.
- the shapes of the transparent electrode 13 and the metal wiring 14 are not limited to the above shapes.
- the substrate sheet 11 is manufactured by printing the transparent electrode 13 and the metal wiring 14 at predetermined locations on the transparent resin film to be the base material 12. And the raw material composition used as the sulfur-resistant resist layer 17 and the light-resistant resist layer 16 is apply
- a substrate sheet (11) having the layer structure shown in FIGS. 1 and 2 was produced.
- Example 1 On the substrate (12) made of a transparent PET resin film, a transparent conductive ink (manufactured by Olgacon P3000 AGFA) was screen-printed to obtain a rectangular transparent electrode (13). Moreover, it screen-printed with the silver ink (made by 7145 DuPont) on the base material (12), and the metal wiring (14) was obtained. Then, a sulfide-resistant resist layer (17) and a light-resistant resist layer (16) were sequentially provided on these by screen printing.
- the tip of the metal wiring (14) was printed with carbon ink to cover it, thereby forming a connector connecting portion (18) for connecting to an electric circuit.
- the connector connecting portion (18) has a portion not covered with a protective layer (15) (sulfur resistant resist layer (17) and light resistant resist layer (16)) on its surface.
- a substrate sheet (11) in which the transparent electrode (13) and the metal wiring (14) were covered with the protective layer (15) was obtained.
- Example 2 to Example 7 Substrate sheets (11) of Examples 2 to 7 were obtained in the same manner as in Example 1 except that the NCO / OH ratio of the sulfur-resistant resist layer (17) of Example 1 was changed to the values shown in Table 1 below.
- Example 8 A substrate sheet (11) of Example 8 having a different order of lamination of the protective layer (15) from Example 1 was produced.
- a light resistant resist layer (16) was formed in the lower layer
- a sulfide resistant resist layer (17) was formed in the upper layer.
- ⁇ Light resistance test method, evaluation method> Using a sunshine weather meter, an accelerated light resistance test (Sunshine carbon arc light source in a 63 ° C. environment, no water jetting) was performed in accordance with JISK7350-4.
- the substrate sheets (11) obtained in Examples 1 to 8 were pasted on a white mount and irradiated from the resist surface side for 300 hours, and the resistance value change rate (%) of the transparent electrode (13) was evaluated.
- ⁇ Sulfuration resistance test method and evaluation method> Place sulfur powder near the substrate sheet (11) obtained in Examples 1 to 8 and leave it in a saturated sulfur vapor atmosphere at 85 ° C. covered with a petri dish for 300 hours and 500 hours. The resistance value change rate (%) of 14) was evaluated. Note that “(disconnected)” in the table indicates that the measured value of the tester exceeded the displayable value of 2 M ⁇ .
- the light-resistant resist layer (16) in the protective layer (15) contains a UV absorber, and the transparent electrode (13) has a resistance value change, but the change is + 320% or less.
- the conductivity is maintained.
- Examples 1 to 5 have a sulfur-resistant resist layer (17) as a protective layer (15), and the metal wiring (14) maintains conductivity although the resistance value changes.
- the metal wiring (14) was disconnected after 300 hours in the sulfidation resistance test, that is, the desired conductivity was lost. Moreover, it turned out that the weight change rate of a sulfur-resistant resist layer (17) is + 35%, and it is easy to permeate
- Example 7 the value of (NCO / OH) was large, the sulfide-resistant resist layer (17) was hard, and the obtained substrate sheet (11) was difficult to bend.
- Example 8 has a configuration in which the protective layer (15) is laminated such that the light-resistant resist layer (16) is formed in the lower layer and the sulfide-resistant resist layer (17) is formed in the upper layer.
- the conductivity could be maintained after 300 hours and a certain sulfidation resistance was obtained, but after 500 hours, the metal wiring (14) was disconnected, that is, the desired conductivity was lost.
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Abstract
Description
そこで本発明は、導電性高分子に対する保護だけでなく、金属配線部分の腐食からの保護もなされた基板シートと、その基板シートを用いて形成されるタッチパネルを提供することを目的とする。
透光性基材上に導電性高分子からなる透明電極と、この透明電極とコネクタ接続部とを繋ぐ金属配線とを有し、透明電極と金属配線とを被覆する保護層が設けられた基板シートであって、保護層が金属配線の硫化を防止する耐硫化性レジスト層と紫外線を吸収する耐光性レジスト層とが透光性基材側からこの順に積層した積層体でなり、耐硫化性レジスト層が、ポリウレタン・ポリウレア系樹脂層である基板シートである。
そして、耐硫化性レジスト層をポリウレタン・ポリウレア系樹脂層としたため、ポリウレア成分の含有によりガスバリア性を向上させることができ、金属配線の硫化を効果的に防止することができる。
ポリウレタン・ポリウレア系樹脂層を形成するポリウレタン・ポリウレア系樹脂を、ポリオール成分のOH基と反応する当量のNCO基を有するポリイソシアネート成分量の1.2倍~5.5倍量のポリイソシアネート成分を含有して硬化させたウレタン結合とウレア結合とを有する樹脂としたため、硫化から金属配線を保護することができる。
ポリウレタン・ポリウレア系樹脂層を形成するポリウレタン・ポリウレア系樹脂が、NCO基/OH基の値が1.2~5.5となる原料を反応硬化させた樹脂であるため、イソシアネート成分が多くなりウレタン結合に加えてウレア結合を有するポリウレタン・ポリウレア系樹脂層を形成する。そのため、ウレア結合が形成されない場合と比較して樹脂の架橋密度を高めることができる。換言すれば、分子鎖どうしの間隔を密にすることができる。そのため、硫黄成分の浸入を防止し易くして硫化劣化から金属配線を保護することができる。よって、耐硫化性に優れた保護層とすることができる。
本実施形態の基板シート11は、図1、図2で示すように、光透過性の基材12と、その基材12上に形成する透明な導電性高分子からなる透明電極13と、その透明電極13を外部の電気回路に接続するための金属配線14と、透明電極13と金属配線14とを被覆する保護層15と、を少なくとも備えた層構成を有しており、静電容量式のタッチパネルとして用いることができるものである。
基材12には、導電性高分子との密着性を高めるプライマー層や、表面保護層、帯電防止等を目的とするオーバーコート層などを設けて表面処理を施しても良い。
金属配線14の材料としては、例えば、銅、アルミニウム、銀またはそれらの金属を含む合金等の高導電性金属を含む導電ペーストや導電インキから形成されることが好ましい。また、これらの金属や合金の中でも導電性が高く、銅よりも酸化し難いという理由から銀配線とすることが好ましい。
さらには、アクリルポリオール、ポリカーボネートポリオール、ポリウレタンポリオール、ポリカプロラクトンポリオールなどを挙げることができる。
耐光性レジスト層16には、紫外線吸収剤を含む。紫外線吸収剤には、サリチル酸系、ベンゾフェノン系、ベンゾトリアゾール系、ヒンダードアミン系等の種々の紫外線吸収剤を用いることができる。
耐光性レジスト層16の厚さは、通常、3μm~10μmでありであり、好ましくは6μm~8μmである。その理由は、厚すぎると柔軟性に乏しくなり、薄すぎると耐光性の作用が弱くなるからである。
ポリオール成分に対してポリイソシアネート成分を当量以上に含む原料を用いたため、ウレタン結合を形成するNCO基とは別の過剰なNCO基が水分と反応しさらに別のNCO基と反応してウレア結合を形成している。したがって、ポリウレタン・ポリウレア系樹脂は、ウレタン結合に加えてウレア結合を有する樹脂であり、単にウレタン結合を有するポリウレタン系樹脂と比較して架橋密度が高い樹脂である。
また、耐硫化性レジスト層17を金属配線14に直接積層させたため、他層を通じて金属配線14に至るだろうと考えられる硫黄成分の浸入を確実に防止することができる。
耐硫化性レジスト層17の厚さは、通常、3μm~10μmであり、好ましくは6μm~8μmである。その理由は、10μmより厚いと柔軟性に乏しくなり、3μmより薄いと耐硫化性の作用が弱くなるからであり、6μm~8μmでは柔軟性があり、かつ耐硫化性が強いからである。
例えば、保護層15を、耐光性と耐硫化性を備える1層で本願発明の2層の場合と同様の厚さに形成することを考えると、2層の場合に比べてイソシアネート成分の含有量を多くしてウレア結合を多く含有させる必要がある。2層の場合と同量のイソシアネート成分を含有させたのでは保護層の架橋密度が低くなり耐硫化性能が悪くなるからである。即ち、1層の場合は2層の場合よりもポリイソシアネート成分を多くせざるを得ず、保護層が硬くなるといった不都合が生じる。また、原料のコスト高にもなる。
なお、基板シート11の構成において、透明電極13や金属配線14は、基材12表面の一部に設けられていれば良く、全面に設けられていても良い。また、必要により基材12の表裏両面に設けられていても良い。
透明電極13や金属配線14等の形状も上記形状に限られるものではない。
例1:
透明なPET樹脂フィルムからなる基材(12)の上に、透明導電性インキ(オルガコンP3000 AGFA社製)をスクリーン印刷し長方形状の透明電極(13)を得た。また、基材(12)の上に銀インキ(7145 デュポン社製)でスクリーン印刷して金属配線(14)を得た。そして、これらの上にスクリーン印刷で耐硫化性レジスト層(17)と耐光性レジスト層(16)とを順次設けた。
下層になる耐硫化性レジスト層(17)は、水酸基価36mgKOH/gのポリエステルポリオールに、HDI系イソシアネートを混合した原料インキ(NCO/OH=2.2)から形成し、上層になる耐光性レジスト層(16)は、ポリエステルポリオールに、HDI系イソシアネートを混合(NCO/OH=1.1)し、さらにベンゾトリアゾール系紫外線吸収剤を添加した原料インキから形成した。
例1の耐硫化性レジスト層(17)のNCO/OH比率を以下の表1記載の値に変更した以外は例1と同様にして例2~例7の基板シート(11)を得た。
例1とは保護層(15)の積層順が異なる例8の基板シート(11)を作製した。
例8では、下層に耐光性レジスト層(16)、上層に耐硫化性レジスト層(17)を形成した。
サンシャインウェザーメータを用いてJISK7350-4に準拠した促進耐光性試験(サンシャインカーボンアーク光源、63℃環境下、水の噴射なし)を行った。
例1~例8で得られた基板シート(11)を白色台紙上に貼り、レジスト面側から300時間照射し、透明電極(13)の抵抗値変化率(%)を評価した。
例1~例8で得られた基板シート(11)の付近に硫黄の粉を載せ、シャーレで蓋をした85℃の飽和硫黄蒸気雰囲気中に、300時間、および500時間放置し、金属配線(14)の抵抗値変化率(%)を評価した。
なお、表中「(断線)」としたのは、テスター測定値が表示可能値の2MΩを超えたことを示す。
例1~例8の基板シート(11)の耐光性レジスト層(16)の形成と同様にして、耐光性レジスト層(16)のみをシート状に塗布成形して例1~例8に対応する耐光性レジスト層(16)のみからなる試験片を作製した。これらの試験片はトルエンに1時間浸漬し、表1の例1~例8にそれぞれ対応する箇所に、重量変化率(%)を記載した。
例1~例5は、保護層(15)の耐硫化性レジスト層(17)を有しており、金属配線(14)は抵抗値変化があるものの導電性を維持している。
例6は、耐硫化性試験で300時間後に金属配線(14)が断線、すなわち所望の導電性が消失した。また、耐硫化性レジスト層(17)の重量変化率が+35%であってトルエンを透過しやすいことがわかった。
例8は、保護層(15)として下層に耐光性レジスト層(16)、上層に耐硫化性レジスト層(17)となるように積層した構成である。耐硫化性試験において300時間後は導電性を保つことができ、一定の耐硫化性が得られているが、500時間後には金属配線(14)が断線、すなわち所望の導電性が消失した。
12 基材
13 透明電極
14 金属配線
15 保護層
16 耐光性レジスト層
17 耐硫化性レジスト層
18 コネクタ接続部
Claims (6)
- 透光性基材上に導電性高分子からなる透明電極と、この透明電極とコネクタ接続部とを繋ぐ金属配線とを有し、透明電極と金属配線とを被覆する保護層が設けられた基板シートであって、
保護層が金属配線の硫化を防止する耐硫化性レジスト層と紫外線を吸収する耐光性レジスト層とが積層した積層体でなり、耐硫化性レジスト層がポリウレタン・ポリウレア系樹脂層である基板シート。 - 保護層が、透光性基材側から耐硫化性レジスト層と耐光性レジスト層がこの順に積層した積層体である請求項1記載の基板シート。
- ポリウレタン・ポリウレア系樹脂層を形成するポリウレタン・ポリウレア系樹脂が、NCO基/OH基の値が1.2~5.5となる原料を反応硬化させた樹脂である請求項1または請求項2記載の基板シート
- 耐硫化性レジスト層が耐光性レジスト層よりも架橋密度が高い層である請求項1~請求項3何れか1項記載の基板シート。
- 耐光性レジスト層がポリウレタン系樹脂層である請求項1~請求項4何れか1項記載の基板シート。
- 表示装置と、該表示装置の画面上に装着した請求項1~請求項5何れか1項記載の基板シートとを備えるタッチパネル。
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US14/394,594 US20150070599A1 (en) | 2012-06-14 | 2013-06-07 | Substrate Sheet and Touch Panel |
JP2014521303A JP6167103B2 (ja) | 2012-06-14 | 2013-06-07 | 基板シートおよびタッチパネル |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2016218922A (ja) * | 2015-05-25 | 2016-12-22 | 信越ポリマー株式会社 | 静電容量式タッチセンサ |
JPWO2015147323A1 (ja) * | 2014-03-28 | 2017-04-13 | ポリマテック・ジャパン株式会社 | タッチセンサ |
JP2017082187A (ja) * | 2015-03-30 | 2017-05-18 | ナガセケムテックス株式会社 | 被覆組成物 |
TWI601999B (zh) * | 2014-05-15 | 2017-10-11 | 宸鴻科技(廈門)有限公司 | 一種觸控面板 |
WO2019009315A1 (ja) | 2017-07-05 | 2019-01-10 | 積水ポリマテック株式会社 | 静電容量式タッチパネル |
JP2019185006A (ja) * | 2018-03-30 | 2019-10-24 | 三星ディスプレイ株式會社Samsung Display Co.,Ltd. | 表示装置 |
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CN108700960A (zh) * | 2016-03-01 | 2018-10-23 | 惠普发展公司有限责任合伙企业 | 光吸收隐私膜 |
NZ720939A (en) * | 2016-03-02 | 2017-12-22 | Resene Paints Ltd | Touch sensitive control system for non-electronic display substrate surfaces |
WO2022191036A1 (ja) | 2021-03-09 | 2022-09-15 | 株式会社フジクラ | 静電容量センサ、及び静電容量センサの製造方法 |
WO2023027034A1 (ja) | 2021-08-25 | 2023-03-02 | 積水ポリマテック株式会社 | 回路シート、センサシート及び皮膜形成組成物 |
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JPWO2015147323A1 (ja) * | 2014-03-28 | 2017-04-13 | ポリマテック・ジャパン株式会社 | タッチセンサ |
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WO2019009315A1 (ja) | 2017-07-05 | 2019-01-10 | 積水ポリマテック株式会社 | 静電容量式タッチパネル |
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Also Published As
Publication number | Publication date |
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JP6167103B2 (ja) | 2017-07-19 |
CN104470716B (zh) | 2016-08-31 |
CN104470716A (zh) | 2015-03-25 |
US20150070599A1 (en) | 2015-03-12 |
JPWO2013187324A1 (ja) | 2016-02-04 |
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