WO2018025957A1 - 剥離層形成用組成物 - Google Patents
剥離層形成用組成物 Download PDFInfo
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- WO2018025957A1 WO2018025957A1 PCT/JP2017/028216 JP2017028216W WO2018025957A1 WO 2018025957 A1 WO2018025957 A1 WO 2018025957A1 JP 2017028216 W JP2017028216 W JP 2017028216W WO 2018025957 A1 WO2018025957 A1 WO 2018025957A1
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- release layer
- substrate
- tetracarboxylic dianhydride
- resin substrate
- composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1075—Partially aromatic polyimides
- C08G73/1082—Partially aromatic polyimides wholly aromatic in the tetracarboxylic moiety
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1003—Preparatory processes
- C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines
- C08G73/1028—Preparatory processes from tetracarboxylic acids or derivatives and diamines characterised by the process itself, e.g. steps, continuous
- C08G73/1032—Preparatory processes from tetracarboxylic acids or derivatives and diamines characterised by the process itself, e.g. steps, continuous characterised by the solvent(s) used
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1039—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors comprising halogen-containing substituents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1046—Polyimides containing oxygen in the form of ether bonds in the main chain
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- 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
Definitions
- the present invention relates to a release layer forming composition, and more particularly, to a release layer forming composition for forming a release layer provided on a substrate.
- the resin substrate used for the touch panel is a polyimide resin substrate, an acrylic resin substrate, a polyethylene terephthalate (PET) resin substrate, a cycloolefin resin substrate having transparency equivalent to that of glass, like a TFT display panel.
- PET polyethylene terephthalate
- a cycloolefin resin substrate having transparency equivalent to that of glass, like a TFT display panel.
- Patent Documents 1, 2, and 3 after an amorphous silicon thin film layer is formed on a glass substrate and a plastic substrate is formed on the thin film layer, laser irradiation is performed from the glass surface side to crystallize amorphous silicon.
- a method of peeling a plastic substrate from a glass substrate with hydrogen gas generated along with the above is disclosed.
- a layer to be peeled (described as “transfer target layer” in Patent Document 4) is attached to a plastic film by using the techniques disclosed in Patent Documents 1 to 3, thereby completing a liquid crystal display device. Is disclosed.
- JP 10-125929 A Japanese Patent Laid-Open No. 10-125931 International Publication No. 2005/050754 JP-A-10-125930
- the present invention has been made in view of the above circumstances, and can be peeled without damaging a resin substrate of a flexible electronic device, particularly a resin substrate formed of a polyimide resin, an acrylic resin, a cycloolefin polymer resin, or the like. It aims at providing the composition for peeling layer formation which gives the peeling layer used as this.
- a composition containing a polyamic acid, which is a reaction product with a tetracarboxylic dianhydride component containing an acid dianhydride, and an organic solvent has excellent adhesion to a substrate and a resin substrate used as a flexible electronic device.
- the inventors have found that a release layer having appropriate adhesion and appropriate peelability can be provided, and completed the present invention.
- a polyamic acid which is a reaction product of a diamine component and a tetracarboxylic dianhydride component, and an organic solvent, wherein the diamine component comprises 2,2′-bis (trifluoromethyl) -4,4′-diaminobiphenyl.
- 2,2′-bis (trifluoromethyl) -4,4′-diaminobiphenyl is 70 mol% or more in the total diamine, and aromatic tetracarboxylic dianhydride represented by the formula (B1) or (B2) 2.
- aromatic tetracarboxylic dianhydride represented by the formula (B1) or (B2) 2.
- the composition for forming a release layer according to 1, comprising 70 mol% or more in tetracarboxylic dianhydride, 3.
- composition for forming a release layer according to 2 comprising 100 mol% in tetracarboxylic dianhydride, 4).
- organic solvent includes at least one selected from amides represented by the formula (S1), amides represented by the formula (S2), and amides represented by the formula (S3)
- a release layer forming composition (In the formula, R 1 and R 2 each independently represent an alkyl group having 1 to 10 carbon atoms.
- R 3 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms. H represents a natural number. Represents.) 5).
- a method for producing a flexible electronic device comprising a resin substrate, characterized in that a release layer of 5 is used, 7).
- a method for producing a touch panel sensor comprising a resin substrate, characterized by using a release layer of 5; 8). The method according to 6 or 7, wherein the resin substrate is a polyimide resin substrate or a resin substrate having a light transmittance of 80% or more at a wavelength of 400 nm.
- the composition for forming a release layer of the present invention By using the composition for forming a release layer of the present invention, it is possible to obtain a film having excellent adhesion to the substrate, moderate adhesion to the resin substrate, and moderate peelability with good reproducibility.
- the composition of the present invention in the manufacturing process of the flexible electronic device, the resin substrate formed on the substrate and the circuit provided on the substrate are not damaged, and the resin substrate together with the circuit etc. Can be separated from the substrate. Therefore, the composition for forming a release layer of the present invention can contribute to simplification of the production process of a flexible electronic device including a resin substrate, improvement of its yield, and the like.
- the composition for forming a release layer of the present invention comprises a diamine component containing 2,2′-bis (trifluoromethyl) -4,4′-diaminobiphenyl and a tetracarboxylic acid containing a specific aromatic tetracarboxylic dianhydride. It contains a polyamic acid that is a reaction product with the acid dianhydride component, and an organic solvent.
- the release layer in the present invention is a layer provided directly on a glass substrate for a predetermined purpose.
- Typical examples of the release layer include a substrate, a polyimide resin, an acrylic resin, a cyclohexane in a flexible electronic device manufacturing process.
- diamine component other diamines can be used together with the 2,2'-bis (trifluoromethyl) -4,4'-diaminobiphenyl.
- Such a diamine may be either an aliphatic diamine or an aromatic diamine, but from the viewpoint of ensuring the strength and heat resistance of the resulting thin film, an aromatic diamine having neither an ester bond nor an ether bond is preferred.
- 1,4-diaminobenzene p-phenylenediamine
- 1,3-diaminobenzene m-phenylenediamine
- 1,2-diaminobenzene o-phenylenediamine
- 2,4-diamino 1,4-diaminobenzene (p-phenylenediamine)
- 1,3-diaminobenzene m-phenylenediamine
- 1,2-diaminobenzene o-phenylenediamine
- 2,4-diamino 2,4-diamino.
- 2,2′-bis (trifluoromethyl) -4,4′-diaminobiphenyl and other diamines are used, 2,2′-bis (trifluoromethyl) -4,4′-
- the amount of diaminobiphenyl used is preferably 70 mol% or more, more preferably 80 mol% or more, still more preferably 90 mol% or more, still more preferably 95 mol% or more, and most preferably 100 mol% in the total diamine. is there. By adopting such a use amount, it is possible to obtain a film having excellent adhesion to the substrate, moderate adhesion to the resin substrate, and moderate peelability with good reproducibility.
- tetracarboxylic dianhydride component other tetracarboxylic dianhydrides can be used together with the aromatic tetracarboxylic dianhydride represented by the formula (B1) or (B2).
- Such a tetracarboxylic dianhydride may be either an aliphatic tetracarboxylic dianhydride or an aromatic tetracarboxylic dianhydride, but from the viewpoint of ensuring the strength and heat resistance of the resulting thin film, an ester bond An aromatic tetracarboxylic dianhydride having neither an ether bond nor an ether bond is preferred.
- pyromellitic dianhydride benzene-1,2,3,4-tetracarboxylic dianhydride, naphthalene-1,2,3,4-tetracarboxylic dianhydride, naphthalene-1 , 2,5,6-tetracarboxylic dianhydride, naphthalene-1,2,6,7-tetracarboxylic dianhydride, naphthalene-1,2,7,8-tetracarboxylic dianhydride, naphthalene- 2,3,5,6-tetracarboxylic dianhydride, naphthalene-2,3,6,7-tetracarboxylic dianhydride, naphthalene-1,4,5,8-tetracarboxylic dianhydride, biphenyl -2,2 ', 3,3'-tetracarboxylic dianhydride, biphenyl-2,3,3', 4'-tetracarboxylic dianhydride,
- the aromatic tetracarboxylic dianhydride having neither an ester bond nor an ether bond is preferably at least one selected from the group consisting of formulas (C1) to (C12) from the viewpoint of ensuring heat resistance.
- At least one selected from the group consisting of formula (C1) and formula (C9) is more preferable.
- the other tetracarboxylic dianhydride when used together with the aromatic tetracarboxylic dianhydride represented by the formula (B1) or (B2), it is represented by the formula (B1) or (B2).
- the amount of aromatic tetracarboxylic dianhydride to be used is preferably 70 mol% or more, more preferably 80 mol% or more, still more preferably 90 mol% or more, more preferably in all tetracarboxylic dianhydrides. It is 95 mol% or more, and most preferably 100 mol%.
- the polyamic acid contained in the composition for forming a release layer according to the present invention can be obtained by reacting the diamine described above with tetracarboxylic dianhydride.
- Organic solvent used in such a reaction is not particularly limited as long as it does not adversely affect the reaction. Specific examples thereof include m-cresol, 2-pyrrolidone, N-methyl-2-pyrrolidone, N-ethyl-2- Pyrrolidone, N-vinyl-2-pyrrolidone, N, N-dimethylacetamide, N, N-dimethylformamide, 3-methoxy-N, N-dimethylpropylamide, 3-ethoxy-N, N-dimethylpropylamide, 3- Propoxy-N, N-dimethylpropylamide, 3-isopropoxy-N, N-dimethylpropylamide, 3-butoxy-N, N-dimethylpropylamide, 3-sec-butoxy-N, N-dimethylpropylamide, 3 -Tert-butoxy-N, N-dimethylpropylamide, ⁇ -butyrolactone and the like. In addition, you may use an organic solvent individually by
- amides represented by formula (S1), amides represented by formula (S2) and formula ( At least one selected from amides represented by S3) is preferred.
- R 1 and R 2 each independently represent an alkyl group having 1 to 10 carbon atoms.
- R 3 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.
- h represents a natural number, preferably 1 to 3, more preferably 1 or 2.
- alkyl group having 1 to 10 carbon atoms examples include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, s-butyl group, t-butyl group, n-pentyl group, n- Examples include hexyl group, n-heptyl group, n-octyl group, n-nonyl group, n-decyl group and the like. Of these, alkyl groups having 1 to 3 carbon atoms are preferable, and alkyl groups having 1 or 2 carbon atoms are more preferable.
- the reaction temperature may be appropriately set in the range from the melting point to the boiling point of the solvent used, and is usually about 0 to 100 ° C., but it prevents imidization in the solution of the resulting polyamic acid and contains a high content of polyamic acid units. In order to maintain the amount, it is preferably about 0 to 70 ° C, more preferably about 0 to 60 ° C, and still more preferably about 0 to 50 ° C.
- the reaction time depends on the reaction temperature and the reactivity of the raw material, and cannot be specified unconditionally, but is usually about 1 to 100 hours.
- a target reaction solution containing polyamic acid can be obtained.
- the weight average molecular weight of the polyamic acid is preferably 5,000 to 1,000,000, more preferably 10,000 to 500,000, and even more preferably 15,000 to 200,000 from the viewpoint of handling properties.
- the weight average molecular weight is an average molecular weight obtained in terms of standard polystyrene by gel permeation chromatography (GPC) analysis.
- a solution obtained by directly or diluting or concentrating the filtrate can be used as the composition for forming a release layer of the present invention.
- the composition for peeling layer formation can be obtained efficiently.
- the solvent in this case include organic solvents used in the above-described reaction.
- the solvent used for dilution is not particularly limited, and specific examples thereof include those similar to the specific examples of the reaction solvent in the above reaction.
- the solvent used for dilution may be used singly or in combination of two or more.
- N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone, N-ethyl-2 are used because they dissolve polyamic acid well.
- -Pyrrolidone and ⁇ -butyrolactone are preferred, and N-methyl-2-pyrrolidone is more preferred.
- ethyl cellosolve, butyl cellosolve, ethyl carbitol, butyl carbitol, ethyl carbitol acetate ethylene glycol, 1-methoxy-2-propanol, 1-ethoxy-2-propanol, 1-butoxy-2-propanol, 1-phenoxy -2-propanol, propylene glycol monoacetate, propylene glycol diacetate, propylene glycol-1-monomethyl ether-2-acetate, propylene glycol-1-monoethyl ether-2-acetate, dipropylene glycol, 2- (2-ethoxy Propoxy) propanol, methyl lactate, ethyl lactate, n-propyl lactate, n-butyl lactate, isoa
- the concentration of the polyamic acid in the composition for forming a release layer of the present invention is appropriately set in consideration of the thickness of the release layer to be produced, the viscosity of the composition, etc., but is usually about 1 to 30% by mass, preferably It is about 1 to 20% by mass. By setting such a concentration, a release layer having a thickness of about 0.05 to 5 ⁇ m can be obtained with good reproducibility.
- the concentration of the polyamic acid is adjusted to adjust the amount of diamine and tetracarboxylic dianhydride used as the raw material of the polyamic acid. After the reaction solution is filtered, the filtrate is diluted or concentrated. The amount can be adjusted by, for example, adjusting the amount thereof when dissolved in a solvent.
- the viscosity of the composition for forming the release layer is appropriately set in consideration of the thickness of the release layer to be produced, etc., but in particular, a film having a thickness of about 0.05 to 5 ⁇ m can be obtained with good reproducibility. When it is intended, it is usually about 10 to 10,000 mPa ⁇ s, preferably about 20 to 5,000 mPa ⁇ s at 25 ° C.
- the viscosity can be measured using a commercially available liquid viscosity measurement viscometer, for example, with reference to the procedure described in JIS K7117-2 at a temperature of the composition of 25 ° C. .
- a conical plate type (cone plate type) rotational viscometer is used as the viscometer, and preferably the composition temperature is 25 ° C. using 1 ° 34 ′ ⁇ R24 as a standard cone rotor. It can be measured under the condition of ° C.
- An example of such a rotational viscometer is TVE-25L manufactured by Toki Sangyo Co., Ltd.
- composition for forming a release layer according to the present invention may contain a component such as a crosslinking agent in addition to the polyamic acid and the organic solvent, for example, in order to improve the film strength.
- a component such as a crosslinking agent in addition to the polyamic acid and the organic solvent, for example, in order to improve the film strength.
- release layer-forming composition of the present invention By applying the release layer-forming composition of the present invention described above to a substrate, and heating the resulting coating to thermally imidize the polyamic acid, it has excellent adhesion to the substrate, and moderate to the resin substrate. It is possible to obtain a release layer made of a polyimide film having good adhesion and moderate peelability.
- the release layer of the present invention When the release layer of the present invention is formed on a substrate, the release layer may be formed on a part of the substrate or the entire surface.
- a release layer As an aspect of forming a release layer on a part of the surface of the substrate, an embodiment in which the release layer is formed only within a predetermined range of the substrate surface, a release layer is formed in a pattern such as a dot pattern or a line and space pattern on the entire surface of the substrate.
- substrate means what is used for manufacture of a flexible electronic device etc. by which the composition for peeling layer formation concerning this invention is applied to the surface.
- the substrate examples include glass, plastic (polycarbonate, polymethacrylate, polystyrene, polyester, polyolefin, epoxy, melamine, triacetyl cellulose, ABS, AS, norbornene resin, etc.), metal (silicon wafer, etc.), Although wood, paper, slate, etc. are mentioned, since the peeling layer obtained from the composition for peeling layer formation which concerns on this invention has sufficient adhesiveness with respect to it, glass is preferable.
- substrate surface may be comprised with the single material and may be comprised with two or more materials.
- the substrate surface is constituted by two or more materials
- a certain range of the substrate surface is constituted by a certain material
- the other surface is constituted by another material.
- a dot pattern is formed on the entire substrate surface.
- a material in a pattern such as a line and space pattern is present in other materials.
- the coating method is not particularly limited.
- a cast coating method for example, a cast coating method, a spin coating method, a blade coating method, a dip coating method, a roll coating method, a bar coating method, a die coating method, an ink jet method, a printing method (a relief plate, an intaglio plate, a planographic plate). , Screen printing, etc.).
- the heating temperature for imidization is usually appropriately determined within the range of 50 to 550 ° C., but is preferably 200 ° C. or higher, and preferably 500 ° C. or lower. By setting the heating temperature in this way, it is possible to sufficiently advance the imidization reaction while preventing the obtained film from being weakened.
- the heating time varies depending on the heating temperature, and cannot be generally defined, but is usually 5 minutes to 5 hours.
- the imidization rate may be in the range of 50 to 100%.
- the heating temperature is raised stepwise as it is, and finally from 375 ° C. to 450 ° C. for 30 minutes to 4 hours.
- the method of heating is mentioned.
- Examples of equipment used for heating include a hot plate and an oven.
- the heating atmosphere may be under air or under an inert gas, and may be under normal pressure or under reduced pressure.
- the thickness of the release layer is usually about 0.01 to 50 ⁇ m, and preferably about 0.05 to 20 ⁇ m, more preferably about 0.05 to 5 ⁇ m from the viewpoint of productivity. To achieve the desired thickness.
- the release layer described above has excellent adhesion to a substrate, particularly a glass substrate, moderate adhesion to a resin substrate, and moderate release. Therefore, the release layer according to the present invention, in the manufacturing process of the flexible electronic device, without damaging the resin substrate of the device, the resin substrate together with the circuit and the like formed on the resin substrate from the substrate. It can be suitably used for peeling.
- a release layer is formed on a glass substrate by the method described above.
- a resin solution for forming a resin substrate is applied, and this coating film is heated to form a resin substrate fixed to the glass substrate via the release layer according to the present invention.
- the resin substrate is formed with a larger area than the area of the release layer so as to cover the entire release layer.
- the resin substrate include a resin substrate made of a polyimide resin, an acrylic resin, or a cycloolefin polymer resin, which is typical as a resin substrate of a flexible electronic device.
- Examples of a resin solution for forming the resin substrate include a polyimide solution, a polyamic resin, and the like. Examples include acid solutions, acrylic polymer solutions, and cycloolefin polymer solutions.
- the method for forming the resin substrate may follow a conventional method.
- a resin substrate with high transparency a resin substrate formed of an acrylic resin or a cycloolefin polymer resin can be exemplified, and in particular, a substrate having a light transmittance of 80% or more at a wavelength of 400 nm is preferable.
- a desired circuit is formed on the resin substrate fixed to the base via the release layer according to the present invention, and then, for example, the resin substrate is cut along the release layer. Is peeled from the release layer to separate the resin substrate and the substrate. At this time, a part of the substrate may be cut together with the release layer.
- the polymer substrate can be suitably peeled from the glass carrier using the laser lift-off method (LLO method) that has been used in the manufacture of high-brightness LEDs, three-dimensional semiconductor packages, and the like.
- LLO method laser lift-off method
- JP 2013-147599 A In manufacturing a flexible display, a polymer substrate made of polyimide or the like is provided on a glass carrier, and then a circuit or the like including an electrode or the like is formed on the substrate. Finally, the substrate is peeled off from the glass carrier together with the circuit or the like. There is a need.
- the LLO method is adopted, that is, when a glass carrier is irradiated with a light beam having a wavelength of 308 nm from the surface opposite to the surface on which a circuit or the like is formed, the light beam with the wavelength passes through the glass carrier, Only the nearby polymer (polyimide resin) absorbs this light and evaporates (sublimates). As a result, it has been reported that peeling of the substrate from the glass carrier can be performed selectively without affecting the circuit or the like provided on the substrate, which determines the performance of the display.
- the composition for forming a release layer of the present invention has a feature of sufficiently absorbing light having a specific wavelength (for example, 308 nm) that can be applied by the LLO method, and thus can be used as a sacrificial layer for the LLO method.
- Mw weight average molecular weight
- Mw molecular weight distribution of a polymer
- GPC apparatus manufactured by JASCO Corporation (column: KD801 and KD805 manufactured by Shodex; eluent: Dimethylformamide / LiBr.H 2 O (29.6 mM) / H 3 PO 4 (29.6 mM) / THF (0.1% by mass); Flow rate: 1.0 mL / min; Column temperature: 40 ° C .; Mw: Standard (Polystyrene equivalent value).
- resin substrate forming composition A resin substrate forming composition was prepared by the following method.
- composition for forming release layer [Example 1-1] BCS and NMP were added to the reaction solution obtained in Synthesis Example L1, and diluted such that the polymer concentration was 5% by mass and BCS was 20% by mass to obtain a release layer forming composition L1.
- Example 1-2 A release layer forming composition L2 was obtained in the same manner as in Example 1-1 except that the reaction solution obtained in Synthesis Example L2 was used instead of the reaction solution obtained in Synthesis Example L1.
- Example 2-1 Production of release layer and resin substrate [Example 2-1] Using a spin coater (condition: about 3,000 rpm for about 30 seconds), the release layer forming composition L1 obtained in Example 1-1 was applied to a 100 mm ⁇ 100 mm glass substrate (hereinafter the same). It was applied on top.
- the obtained coating film was heated at 80 ° C. for 10 minutes using a hot plate, and then heated at 300 ° C. for 30 minutes using an oven, and the heating temperature was raised to 400 ° C. (10 ° C./min. And then heated at 400 ° C. for 30 minutes to form a release layer having a thickness of about 0.1 ⁇ m on the glass substrate, thereby obtaining a glass substrate with a release layer.
- the glass substrate was not removed from the oven, but heated in the oven.
- the resin substrate forming composition F1 was applied on the release layer (resin thin film) on the glass substrate obtained above.
- the obtained coating film was heated at 80 ° C. for 30 minutes using a hot plate, and then heated at 140 ° C. for 30 minutes using an oven, and the heating temperature was raised to 210 ° C. (2 ° C./min.
- the heating temperature was raised to 210 ° C. for 30 minutes, the heating temperature was raised to 300 ° C., the heating temperature was raised to 300 ° C. for 30 minutes, the heating temperature was raised to 400 ° C., and the heating temperature was raised to 400 ° C. for 60 minutes.
- a resin substrate having a thickness of about 20 ⁇ m was formed to obtain a glass substrate with a resin substrate and a release layer. During the temperature increase, the glass substrate was not removed from the oven, but heated in the oven.
- Example 2-2 Using the release layer forming composition L1 obtained in Example 1-1, a release layer was formed in the same manner as in Example 2-1, to obtain a glass substrate with a release layer.
- the composition F2 for resin substrate formation was apply
- the obtained coating film is heated at 80 ° C. for 10 minutes using a hot plate, and then heated at 230 ° C. for 30 minutes using a hot plate to form a resin substrate having a thickness of about 5 ⁇ m on the release layer.
- a glass substrate with a resin substrate and a release layer was obtained. Thereafter, the light transmittance was measured using an ultraviolet-visible spectrophotometer (UV-2600 manufactured by Shimadzu Corporation). As a result, the resin substrate showed a transmittance of 80% or more at 400 nm.
- UV-2600 ultraviolet-visible spectrophotometer
- Example 2-3 The same procedure as in Example 2-1 except that the release layer forming composition L2 obtained in Example 1-2 was used instead of the release layer forming composition L1 obtained in Example 1-1.
- a release layer and a resin substrate were prepared, and a glass substrate with a release layer and a glass substrate with a resin substrate / release layer were obtained.
- Example 2-4 The same as Example 2-2, except that the release layer forming composition L2 obtained in Example 1-2 was used instead of the release layer forming composition L1 obtained in Example 1-1.
- a release layer and a resin substrate were prepared, and a glass substrate with a release layer and a glass substrate with a resin substrate / release layer were obtained.
- Example 2-5 Using the release layer forming composition L1 obtained in Example 1-1, a release layer was formed in the same manner as in Example 2-1, to obtain a glass substrate with a release layer. Then, immediately using a spin coater (condition: about 15 seconds at a rotation speed of 200 rpm), the resin substrate forming composition F3 was applied on the release layer (resin thin film) on the glass substrate. The obtained coating film was heated at 80 ° C. for 2 minutes using a hot plate, and then heated at 230 ° C. for 30 minutes using a hot plate to form a resin substrate having a thickness of about 3 ⁇ m on the release layer. A glass substrate with a resin substrate and a release layer was obtained. Thereafter, the light transmittance was measured using an ultraviolet-visible spectrophotometer (UV-2600 manufactured by Shimadzu Corporation). As a result, the resin substrate showed a transmittance of 80% or more at 400 nm.
- UV-2600 ultraviolet-visible spectrophotometer
- Example 2-5 was the same as Example 2-5 except that the release layer forming composition L2 obtained in Example 1-2 was used instead of the release layer forming composition L1 obtained in Example 1-1.
- a release layer and a resin substrate were prepared, and a glass substrate with a release layer and a glass substrate with a resin substrate / release layer were obtained.
- Example 2-7 Using the release layer forming composition L1 obtained in Example 1-1, a release layer was formed in the same manner as in Example 2-1, to obtain a glass substrate with a release layer. Immediately thereafter, using a spin coater (condition: about 15 seconds at 200 rpm), the resin substrate forming composition F4 was applied on the release layer (resin thin film) on the glass substrate. The obtained coating film was heated at 80 ° C. for 2 minutes using a hot plate, and then heated at 230 ° C. for 30 minutes using a hot plate to form a resin substrate having a thickness of about 3 ⁇ m on the release layer. A glass substrate with a resin substrate and a release layer was obtained. Thereafter, the light transmittance was measured using an ultraviolet-visible spectrophotometer (UV-2600 manufactured by Shimadzu Corporation). As a result, the resin substrate showed a transmittance of 80% or more at 400 nm.
- UV-2600 ultraviolet-visible spectrophotometer
- Example 2-7 was the same as Example 2-7 except that the release layer forming composition L2 obtained in Example 1-2 was used instead of the release layer forming composition L1 obtained in Example 1-1.
- a release layer and a resin substrate were prepared, and a glass substrate with a release layer and a glass substrate with a resin substrate / release layer were obtained.
- Example 2-1 The same procedure as in Example 2-1 except that the release layer forming composition HL1 obtained in Comparative Example 1-1 was used instead of the release layer forming composition L1 obtained in Example 1-1. A release layer and a resin substrate were formed by the method, and a glass substrate with a release layer and a glass substrate with a resin substrate / release layer were obtained.
- Example 2-2 The same procedure as in Example 2-2 except that the release layer forming composition HL1 obtained in Comparative Example 1-1 was used instead of the release layer forming composition L1 obtained in Example 1-1. A release layer and a resin substrate were formed by the method, and a glass substrate with a release layer and a glass substrate with a resin substrate / release layer were obtained.
- Example 2-3 The same procedure as in Example 2-1 except that the release layer forming composition HL2 obtained in Comparative Example 1-2 was used instead of the release layer forming composition L1 obtained in Example 1-1. A release layer and a resin substrate were formed by the method, and a glass substrate with a release layer and a glass substrate with a resin substrate / release layer were obtained.
- a peel force evaluation test was conducted using the resin substrate / glass substrate with the release layer prepared in Examples 2-5 to 2-8.
- a resin substrate / glass substrate with a release layer was cut into a 25 mm ⁇ 50 mm width rectangle so as to penetrate to the back surface of the resin substrate with a cutter knife to produce a strip.
- cellophane tape registered trademark, Nichiban CT-24
- 90 ° with respect to the surface of the substrate using Autograph AG-500N (manufactured by Shimadzu Corporation).
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Abstract
Description
特に、新世代ディスプレイでは、軽量なフレキシブルプラスチック基板(以下、樹脂基板と表記する)を用いたアクティブマトリクス型フルカラーTFTディスプレイパネルの開発が求められている。この新世代ディスプレイに関する技術は、フレキシブルディスプレイや、フレキシブルスマートフォン、ミラーディスプレイ等の様々な分野への転用が期待されている。
しかも、被剥離層が大面積である場合には、レーザー処理に長時間を要するため、デバイス作製の生産性を上げることが難しい。
1. ジアミン成分とテトラカルボン酸二無水物成分との反応物であるポリアミック酸、及び有機溶媒を含み、上記ジアミン成分が、2,2’-ビス(トリフルオロメチル)-4,4’-ジアミノビフェニルを含み、上記テトラカルボン酸二無水物成分が、式(B1)又は(B2)で表される芳香族テトラカルボン酸二無水物を含むことを特徴とする剥離層形成用組成物、
3. 2,2’-ビス(トリフルオロメチル)-4,4’-ジアミノビフェニルを全ジアミン中100モル%、及び式(B1)又は(B2)で表される芳香族テトラカルボン酸二無水物を全テトラカルボン酸二無水物中100モル%含む2に記載の剥離層形成用組成物、
4. 上記有機溶媒が、式(S1)で表されるアミド類、式(S2)で表されるアミド類及び式(S3)で表されるアミド類から選ばれる少なくとも1種を含む1~3のいずれかの剥離層形成用組成物、
5. 1~4のいずれかの剥離層形成用組成物を用いて形成される剥離層、
6. 5の剥離層を用いることを特徴とする、樹脂基板を備えるフレキシブル電子デバイスの製造方法、
7. 5の剥離層を用いることを特徴とする、樹脂基板を備えるタッチパネルセンサーの製造方法、
8. 上記樹脂基板が、ポリイミド樹脂基板又は波長400nmの光透過率が80%以上である樹脂基板である6又は7の製造方法
を提供する。
本発明の剥離層形成用組成物は、2,2’-ビス(トリフルオロメチル)-4,4’-ジアミノビフェニルを含むジアミン成分と、特定の芳香族テトラカルボン酸二無水物を含むテトラカルボン酸二無水物成分との反応物であるポリアミック酸、及び有機溶媒を含むものである。ここで、本発明における剥離層とは、所定の目的でガラス基体直上に設けられる層であって、その典型例としては、フレキシブル電子デバイスの製造プロセスにおいて、基体と、ポリイミド樹脂、アクリル樹脂、シクロオレフィンポリマー樹脂等で形成されるフレキシブル電子デバイスの樹脂基板との間に、当該樹脂基板を所定のプロセス中において固定するために設けられ、かつ、当該樹脂基板上に電子回路等の形成した後において当該樹脂基板が当該基体から容易に剥離できるようにするために設けられるものが挙げられる。
本発明では、組成物に含まれるポリアミック酸において、ジアミン成分として2,2’-ビス(トリフルオロメチル)-4,4’-ジアミノビフェニルを使用する。
また、テトラカルボン酸二無水物成分としては、式(B1)又は(B2)で表される芳香族テトラカルボン酸二無水物を使用する。
このような反応に用いる有機溶媒は、反応に悪影響を及ぼさない限り特に限定されないが、その具体例としては、m-クレゾール、2-ピロリドン、N-メチル-2-ピロリドン、N-エチル-2-ピロリドン、N-ビニル-2-ピロリドン、N,N-ジメチルアセトアミド、N,N-ジメチルホルムアミド、3-メトキシ-N,N-ジメチルプロピルアミド、3-エトキシ-N,N-ジメチルプロピルアミド、3-プロポキシ-N,N-ジメチルプロピルアミド、3-イソプロポキシ-N,N-ジメチルプロピルアミド、3-ブトキシ-N,N-ジメチルプロピルアミド、3-sec-ブトキシ-N,N-ジメチルプロピルアミド、3-tert-ブトキシ-N,N-ジメチルプロピルアミド、γ-ブチロラクトン等が挙げられる。なお、有機溶媒は、1種単独で又は2種以上を組み合わせて使用してもよい。
本発明に係る剥離層形成用組成物を用いて、前述の方法によって、ガラス基体上に剥離層を形成する。この剥離層の上に、樹脂基板を形成するための樹脂溶液を塗布し、この塗膜を加熱することで、本発明に係る剥離層を介して、ガラス基体に固定された樹脂基板を形成する。この際、剥離層を全て覆うようにして、剥離層の面積と比較して大きい面積で、樹脂基板を形成する。上記樹脂基板としては、フレキシブル電子デバイスの樹脂基板として代表的なポリイミド樹脂やアクリル樹脂、シクロオレフィンポリマー樹脂からなる樹脂基板等が挙げられ、それを形成するための樹脂溶液としては、ポリイミド溶液、ポリアミック酸溶液、アクリルポリマー溶液及びシクロオレフィンポリマー溶液が挙げられる。当該樹脂基板の形成方法は、常法に従えばよい。また、透明性が高い樹脂基板としては、アクリル樹脂やシクロオレフィンポリマー樹脂で形成される樹脂基板を例示することができ、特に波長400nmの光透過率が80%以上であるものが好ましい。
p-PDA:p-フェニレンジアミン
TFMB:2,2’-ビス(トリフルオロメチル)-4,4’-ジアミノビフェニル
FDA:9,9-ビス(4-アミノフェニル)フルオレン
TAHQ:p-フェニレンビス(トリメリット酸モノエステル酸無水物)
BPTME:p-ビフェニレンビス(トリメリット酸モノエステル酸無水物)
BTDA:3,3’,4,4’-ベンゾフェノンテトラカルボン酸二無水物
BPDA:3,3’,4,4’-ビフェニルテトラカルボン酸二無水物
MMA:メタクリル酸メチル
MAA:メタクリル酸
HEMA:メタクリル酸2-ヒドロキシエチル
AIBN:アゾビスイソブチロニトリル
CHMI:シクロヘキシルマレイミド
エポリード GT-401:エポキシ化ブタンテトラカルボン酸テトラキス-(3-シクロヘキセニルメチル)修飾 ε-カプロラクトン、(株)ダイセル製
NMP:N-メチル-2-ピロリドン
PGMEA:プロピレングリコールモノメチルエーテルアセテート
BCS:ブチルセロソルブ
ポリマーの重量平均分子量(以下Mwと略す)及び分子量分布の測定は、日本分光(株)製GPC装置(カラム:Shodex製 KD801及びKD805;溶離液:ジメチルホルムアミド/LiBr・H2O(29.6mM)/H3PO4(29.6mM)/THF(0.1質量%);流量:1.0mL/分;カラム温度:40℃;Mw:標準ポリスチレン換算値)を用いて行った。
以下の方法によって、実施例及び比較例で使用する各種ポリマーを合成した。
なお、得られたポリマー含有反応液からポリマーを単離せず、後述の通りに、反応液を希釈することで、樹脂基板形成用組成物又は剥離層形成用組成物を調製した。
p-PDA3.22g(29.8mmol)をNMP88.2gに溶解させた。得られた溶液にBPDA8.58g(29.2mmol)を加え、窒素雰囲気下、23℃で24時間反応させた。得られたポリマーのMwは107,300、分子量分布は4.6であった。
MMA7.20g(7.19mmol)、HEMA7.20g(5.53mmol)、CHMI10.8g(6.03mmol)、MAA4.32g(5.02mmol)、AIBN2.46g(1.50mmol)をPGMEA46.9gに溶解し、60~100℃にて20時間反応させることによりアクリル重合体溶液(固形分濃度40質量%)を得た。得られたアクリル重合体のMwは7,300、分子量分布1.9であった。
TFMB1.99g(6.20mmol)をNMP35.4gに溶解させた。得られた溶液に、TAHQ2.06g(9.47mmol)を加え、窒素雰囲気下、23℃で24時間反応させた。得られたポリマーのMwは41,000、分子量分布1.9であった。
TFMB1.83g(5.70mmol)をNMP35.7gに溶解させた。得られた溶液に、BPTME3.05g(5.70mmol)を加え、窒素雰囲気下、23℃で24時間反応させた。得られたポリマーのMwは40,600、分子量分布2.0であった。
FDA1.56g(4.47mmol)をNMP7.0gに溶解させた。得られた溶液に、BTDA1.44g(4.47mmol)を加え、窒素雰囲気下、23℃で24時間反応させた。得られたポリマーのMwは67,300、分子量分布2.0であった。
p-PDA0.98g(9.02mmol)をNMP36.0gに溶解させた。得られた溶液に、BTDA3.03g(9.39mmol)を加え、窒素雰囲気下、23℃で24時間反応させた。得られたポリマーのMwは67,600、分子量分布1.8であった。
以下の方法によって、樹脂基板形成用組成物を調製した。
合成例S1で得られた反応液をそのまま樹脂基板形成用組成物F1として用いた。
合成例S2で得られた反応液10gにGT-401 0.61gとPGMEA5.06gを添加し、23℃で24時間撹拌して、樹脂基板形成用組成物F2を調製した。
四塩化炭素100gを入れたナスフラスコに、ゼオノア(登録商標)1020R(日本ゼオン(株)製、シクロオレフィンポリマー樹脂)10g及びGT-401 3gを添加した。この溶液を、窒素雰囲気下、24時間攪拌して溶解し、樹脂基板形成用組成物F3を調製した。
四塩化炭素100gを入れたナスフラスコに、ゼオノア(登録商標)1060R(日本ゼオン(株)製、シクロオレフィンポリマー樹脂)10gを添加した。この溶液を、窒素雰囲気下、24時間攪拌して溶解し、樹脂基板形成用組成物F4を調製した。
[実施例1-1]
合成例L1で得られた反応液に、BCSとNMPを加え、ポリマー濃度が5質量%、BCSが20質量%となるように希釈し、剥離層形成用組成物L1を得た。
合成例L1で得られた反応液の代わりに、合成例L2で得られた反応液を用いた以外は、実施例1-1と同様の方法で、剥離層形成用組成物L2を得た。
比較合成例HL1で得られた反応液に、BCSとNMPを加え、ポリマー濃度が5質量%、BCSが20質量%となるように希釈し、剥離層形成用組成物HL1を得た。
比較合成例HL2で得られた反応液に、BCSとNMPを加え、ポリマー濃度が5質量%、BCSが20質量%となるように希釈し、剥離層形成用組成物HL2を得た。
[実施例2-1]
スピンコータ(条件:回転数3,000rpmで約30秒)を用いて、実施例1-1で得られた剥離層形成用組成物L1を、ガラス基体としての100mm×100mmガラス基板(以下同様)の上に塗布した。
そして、得られた塗膜を、ホットプレートを用いて80℃で10分間加熱し、その後、オーブンを用いて、300℃で30分間加熱し、加熱温度を400℃まで昇温(10℃/分)し、更に400℃で30分間加熱し、ガラス基板上に厚さ約0.1μmの剥離層を形成し、剥離層付きガラス基板を得た。なお、昇温の間、ガラス基板をオーブンから取り出すことはせず、オーブン内で加熱した。
実施例1-1で得られた剥離層形成用組成物L1を用いて、実施例2-1と同様の方法で剥離層を形成し、剥離層付きガラス基板を得た。
実施例1-1で得られた剥離層形成用組成物L1の代わりに、実施例1-2で得られた剥離層形成用組成物L2を用いた以外は、実施例2-1と同様の方法で、剥離層及び樹脂基板を作製し、剥離層付きガラス基板及び樹脂基板・剥離層付きガラス基板を得た。
実施例1-1で得られた剥離層形成用組成物L1の代わりに、実施例1-2で得られた剥離層形成用組成物L2を用いた以外は、実施例2-2と同様の方法で、剥離層及び樹脂基板を作製し、剥離層付きガラス基板及び樹脂基板・剥離層付きガラス基板を得た。
実施例1-1で得られた剥離層形成用組成物L1を用いて、実施例2-1と同様の方法で剥離層を形成し、剥離層付きガラス基板を得た。
その後、すぐにスピンコータ(条件:回転数200rpmで約15秒)を用いて、上記ガラス基板上の剥離層(樹脂薄膜)の上に樹脂基板形成用組成物F3を塗布した。得られた塗膜を、ホットプレートを用いて80℃で2分間加熱し、その後、ホットプレートを用いて230℃で30分間加熱し、剥離層上に厚さ約3μmの樹脂基板を形成し、樹脂基板・剥離層付きガラス基板を得た。その後、紫外可視分光光度計((株)島津製作所製UV-2600)を用いて光透過率を測定した結果、樹脂基板は、400nmで80%以上の透過率を示した。
実施例1-1で得られた剥離層形成用組成物L1の代わりに、実施例1-2で得られた剥離層形成用組成物L2を用いた以外は、実施例2-5と同様の方法で、剥離層及び樹脂基板を作製し、剥離層付きガラス基板及び樹脂基板・剥離層付きガラス基板を得た。
実施例1-1で得られた剥離層形成用組成物L1を用いて、実施例2-1と同様の方法で剥離層を形成し、剥離層付きガラス基板を得た。
その後、すぐにスピンコータ(条件:回転数200rpmで約15秒)を用いて、上記ガラス基板上の剥離層(樹脂薄膜)の上に樹脂基板形成用組成物F4を塗布した。得られた塗膜を、ホットプレートを用いて80℃で2分間加熱し、その後、ホットプレートを用いて230℃で30分間加熱し、剥離層上に厚さ約3μmの樹脂基板を形成し、樹脂基板・剥離層付きガラス基板を得た。その後、紫外可視分光光度計((株)島津製作所製UV-2600)を用いて光透過率を測定した結果、樹脂基板は、400nmで80%以上の透過率を示した。
実施例1-1で得られた剥離層形成用組成物L1の代わりに、実施例1-2で得られた剥離層形成用組成物L2を用いた以外は、実施例2-7と同様の方法で、剥離層及び樹脂基板を作製し、剥離層付きガラス基板及び樹脂基板・剥離層付きガラス基板を得た。
実施例1-1で得られた剥離層形成用組成物L1の代わりに、比較例1-1で得られた剥離層形成用組成物HL1を用いた以外は、実施例2-1と同様の方法で剥離層及び樹脂基板を形成し、剥離層付きガラス基板及び樹脂基板・剥離層付ガラス基板を得た。
実施例1-1で得られた剥離層形成用組成物L1の代わりに、比較例1-1で得られた剥離層形成用組成物HL1を用いた以外は、実施例2-2と同様の方法で剥離層及び樹脂基板を形成し、剥離層付きガラス基板及び樹脂基板・剥離層付ガラス基板を得た。
実施例1-1で得られた剥離層形成用組成物L1の代わりに、比較例1-2で得られた剥離層形成用組成物HL2を用いた以外は、実施例2-1と同様の方法で剥離層及び樹脂基板を形成し、剥離層付きガラス基板及び樹脂基板・剥離層付ガラス基板を得た。
上記実施例2-1~2-8及び比較例2-1~2-3で得られた剥離層付きガラス基板について、剥離層とガラス基板との剥離性を、樹脂基板・剥離層付きガラス基板について、剥離層と樹脂基板との剥離性を、下記手法にて確認した。
実施例2-1~2-8及び比較例2-1~2-3で得られた剥離層付きガラス基板上の剥離層、並びに、樹脂基板・剥離層付きガラス基板上の剥離層及び樹脂基板をクロスカット(縦横2mm間隔、以下同様)し、25マスカットを行った。すなわち、このクロスカットにより、2mm四方のマス目を25個形成した。
そして、この25マスカット部分に粘着テープを張り付けて、そのテープを剥がし、以下の基準(5B~0B,B,A,AA)に基づき、剥離の程度を評価した。
更に、全て剥離した基板のうち、実施例2-5~2-8で作成した樹脂基板・剥離層付きガラス基板を用いて、剥離力評価試験を実施した。試験方法は、樹脂基板・剥離層付きガラス基板の樹脂基板を25mm×50mm幅の長方形に、カッターナイフにて樹脂基板の背面まで貫通するように切り込みを入れ、短冊を作製した。更に、作成した短冊上に、セロハンテープ(登録商標、ニチバンCT-24)をはった後、オートグラフAG-500N((株)島津製作所製)を用いて、基板の面に対して90度で、すなわち、垂直方向に剥離し、剥離力を測定し、100%剥離(すべて剥離)で、なおかつ剥離力が0.1N/25mm未満のものをAAAとした。
以上の結果を表1に示す。
<判定基準>
5B:0%剥離(剥離なし)
4B:5%未満の剥離
3B:5~15%未満の剥離
2B:15~35%未満の剥離
1B:35~65%未満の剥離
0B:65%~80%未満の剥離
B:80%~95%未満の剥離
A:95%~100%未満の剥離
AA:100%剥離(すべて剥離)
AAA:100%剥離で剥離力が0.1N/25mm未満
実施例2-1~2-8及び比較例2-1~2-3で得られた樹脂基板・剥離層付きガラス基板について、上記の剥離性評価と同様の手順でその剥離性を評価した。結果を表1に示す。
Claims (8)
- 2,2’-ビス(トリフルオロメチル)-4,4’-ジアミノビフェニルを全ジアミン中70モル%以上、式(B1)又は(B2)で表される芳香族テトラカルボン酸二無水物を全テトラカルボン酸二無水物中70モル%以上含む請求項1に記載の剥離層形成用組成物。
- 2,2’-ビス(トリフルオロメチル)-4,4’-ジアミノビフェニルを全ジアミン中100モル%、及び式(B1)又は(B2)で表される芳香族テトラカルボン酸二無水物を全テトラカルボン酸二無水物中100モル%含む請求項2に記載の剥離層形成用組成物。
- 請求項1~4のいずれか1項に記載の剥離層形成用組成物を用いて形成される剥離層。
- 請求項5に記載の剥離層を用いることを特徴とする、樹脂基板を備えるフレキシブル電子デバイスの製造方法。
- 請求項5に記載の剥離層を用いることを特徴とする、樹脂基板を備えるタッチパネルセンサーの製造方法。
- 上記樹脂基板が、ポリイミド樹脂基板又は波長400nmの光透過率が80%以上である樹脂基板である請求項6又は7に記載の製造方法。
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