Composition, polyimide film prepared using the same, electronic device including the same, and method of preparing the polyimide film

Abstract

Disclosed are a composition including a polymeric component and a solvent, the polymeric component including: a first component including a diamine compound; and a second component including a tetracarboxylic dianhydride, wherein the solvent includes a mixed solvent including two or more solvents, the mixed solvent including an amide-based solvent and a sulfone-based solvent, a polyimide film prepared using the composition, an electronic device including the polyimide film, and a method of preparing the polyimide film.

Description

Technical Field

[0001] This invention relates to a composition, a polyimide film prepared using the composition, an electronic device including the polyimide film, and a method for preparing the polyimide film. Background Technology

[0002] Polyimide films that can be used as substrates for light-emitting devices are required to have good performance in terms of optical properties, surface properties, and thermal stability.

[0003] Recently, development has been actively underway for flexible, foldable, and / or rollable articles and / or devices, especially with the growing demand for new solvents to replace environmentally restricted solvents in the preparation of polyimide films. Summary of the Invention

[0004] A novel composition, a polyimide film prepared using the composition, an electronic device including the polyimide film, and a method for preparing the polyimide film are provided.

[0005] According to one aspect, a composition is provided, comprising: The polymeric component includes: a first component comprising a diamine compound; and a second component comprising a tetracarboxylic dianhydride; and Solvent, The solvent includes a mixed solvent comprising two or more solvents. The mixed solvent includes amide solvents and sulfone solvents.

[0006] According to another aspect, a polyimide film formed from said composition is provided.

[0007] According to another aspect, an electronic device comprising the polyimide film is provided.

[0008] According to another aspect, an electronic device including the polyimide film is provided.

[0009] According to another aspect, a method for preparing a polyimide mold is provided, comprising the following steps: The composition is coated onto a carrier substrate; and A polyimide film is formed by imidization of the composition by heating. The composition is as described above.

[0010] Invention Effects The compositions of the present invention and the polyimide films prepared using the compositions obviously do not require the use of environmentally restricted solvents, and also have improved surface properties and excellent thickness reliability. Furthermore, high-quality electronic devices and electronic equipment can be provided by utilizing the compositions and the polyimide films prepared using the compositions. Attached Figure Description

[0011] Figure 1 This is a schematic cross-sectional view of an electronic device according to an embodiment of the present invention.

[0012] Figure 2 This is a schematic cross-sectional view of an electronic device according to another implementation of the present invention.

[0013] Figure 3 This is a block diagram of an electronic device based on an implementation example.

[0014] Figure 4 These are schematic diagrams of electronic devices based on various implementation examples.

[0015] Figure 5 This is a perspective view schematically illustrating an electronic device including a polyimide film according to an embodiment of the present invention.

[0016] Figure 6 This is a schematic diagram showing the exterior of a vehicle as an electronic device including a polyimide film according to one embodiment of the invention.

[0017] Figures 7a to 7c This is a schematic diagram illustrating the interior of a vehicle according to various implementations of the present invention.

[0018] Explanation of reference numerals in the attached figures 1: Electronic equipment 100: Substrate Detailed Implementation

[0019] This invention can be modified in various ways and can have various embodiments, and specific embodiments are exemplarily shown in the accompanying drawings and described in detail below. The effects and features of the invention, as well as the methods for achieving these effects and features, will become clear with reference to the embodiments described in detail below in conjunction with the accompanying drawings. However, the invention is not limited to the embodiments disclosed below, and can be implemented in many different forms.

[0020] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. When describing with reference to the drawings, the same or corresponding constituent elements will be given the same reference numerals, and repeated descriptions thereon will be omitted.

[0021] In the following embodiments, the terms "first" and "second" are not intended to be limiting, but are used to distinguish one constituent element from another.

[0022] In the following embodiments, unless the context clearly indicates otherwise, singular expressions include plural expressions.

[0023] In the following embodiments, terms such as "comprising" or "having" mean the presence of the features or constituent elements described in the specification, and do not preclude the possibility of adding more than one other feature or constituent element.

[0024] In the following embodiments, when referring to various constituent elements such as layers, films, regions, and plates as being located "above" another constituent element, this includes not only the case where it is located "immediately above" another constituent element, but also the case where other constituent elements are sandwiched between them. Furthermore, for ease of explanation, the dimensions of constituent elements may be enlarged or reduced in the drawings. For example, for ease of explanation, the dimensions and thicknesses of the various components shown in the drawings are arbitrarily illustrated, but the invention is not necessarily limited to the contents illustrated.

[0025] [Composition] According to one embodiment, a composition is provided, comprising: The polymeric component includes: a first component comprising a diamine compound; and a second component comprising a tetracarboxylic dianhydride; and Solvent, The solvent includes a mixed solvent comprising two or more solvents. The mixed solvent includes amide solvents and sulfone solvents.

[0026] According to one embodiment, the amide solvent may include N,N-dimethylpropionamide, 3-methoxy-N,N-dimethylpropionamide, N-methylpropionamide, N,N-diethylformamide, or any combination thereof.

[0027] According to another implementation example, the amide solvent may be N,N-dimethylpropionamide.

[0028] According to one embodiment, the amide solvent may include a compound represented by the following chemical formula 1: <Chemical Formula 1>

[0029] In the chemical formula 1, R1 to R3 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, or bound by at least one R. 10a C1-C, whether substituted or not 60 Alkyl, with at least one R 10a C2-C, whether substituted or not 60 alkenyl, with at least one R 10aC2-C, whether substituted or not 60 Alkyne group, with at least one R 10a C1-C, whether substituted or not 60 Alkyl group, with at least one R 10a C1-C, whether substituted or not 60 Alkyl thio group, with at least one R 10a C3-C, whether substituted or not 60 Carbocyclic group, with at least one R 10a C1-C, whether substituted or not 60 Heterocyclic groups, with at least one R 10a Replaced or unreplaced C6-C 60 aryloxy group, with at least one R 10a Replaced or unreplaced C6-C 60 Arylthio, -C(Q1)(Q2)(Q3), -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1), or -P(=O)(Q1)(Q2), a1 is an integer from 0 to 20. The R 10a It can be deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, or nitro; Deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C7-C 60 Arylalkyl, C2-C 60 heteroarylalkyl, -Si(Q) 11 (Q) 12 (Q) 13 -N(Q) 11 (Q) 12 -B(Q) 11 (Q) 12 -C(=O)(Q) 11 -S(=O)2(Q) 11 -P(=O)(Q) 11 (Q) 12 ) or any combination thereof replacing or not replacing C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl or C1-C 60 Alkoxy; The following groups are used: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 Alkoxy, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C7-C 60 Arylalkyl, C2-C 60 heteroarylalkyl, -Si(Q) 21 (Q) 22 (Q) 23 -N(Q) 21 (Q) 22 -B(Q) 21 (Q) 22 -C(=O)(Q) 21 -S(=O)2(Q) 21 -P(=O)(Q) 21 (Q) 22 C3-C, or any combination thereof, may or may not be substituted. 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C7-C 60 Arylalkyl or C2-C 60 heteroarylalkyl; or -Si(Q 31 (Q) 32 (Q) 33 -N(Q) 31 (Q) 32 -B(Q) 31 (Q) 32 -C(=O)(Q) 31 -S(=O)2(Q) 31 ), or -P(=O)(Q 31 (Q) 32 ), Wherein, Q1 to Q3, Q 11 To the Q 13 The Q 21 To the Q 23 and the Q 31 To the Q 33 They can be hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C1-C, or C2-C2. 60 Alkyl; C2-C60 Alkenyl; C2-C 60 Alkyne group; C1-C 60 alkoxy groups; or those represented by deuterium, -F, cyano, C1-C. 60 Alkyl, C1-C 60 Alkoxy, phenyl, biphenyl, or any combination thereof substituted or unsubstituted C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic group; C7-C 60 arylalkyl; or C2-C 60 Heteroarylalkyl.

[0030] According to one implementation example, in the chemical formula 1, R1 to R3 are independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 Alkyne group or C1-C 60 Alkoxy; The following groups are used: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C1-C 60 Alkyl, C1-C 60 cycloalkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 Alkoxy, phenyl, biphenyl, terphenyl, or any combination thereof substituted or unsubstituted C1-C 60 Alkyl, C1-C 60 cycloalkyl, C1-C 60 Heterocyclic alkyl, phenyl, biphenyl, terphenyl, tetraphenyl, pentaphenyl, naphthyl, anthracene, phenanthrene, phenatenyl, benzo[9,10]phenanthrene, pyrene, pyrrolyl, furanyl, thiophene, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, pyridinyl, pyrimidinyl, pyridazinyl, isoindole, indole, inzolyl, purine, quinolinyl, isoquinolinyl, benzoquinolinyl Quinoxolinyl, quinazolinyl, phenanthrolinel, phenanthrolinel, benzimidazolyl, benzofuranyl, dibenzofuranyl, benzothiophenyl, dibenzothiophenyl, benzoisothiazolyl, benzooxazolyl, benzoisoxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, carbazoleyl, benzocarbazoleyl, fluorenyl, phenoxazinyl, acridineyl, and xanthenyl; and -Si(Q1)(Q2)(Q3), -Ge(Q1)(Q2)(Q3) and -N(Q1)(Q2).

[0031] According to one implementation example, in the chemical formula 1, R1 can be hydrogen, deuterium, or at least one R 10a C1-C, whether substituted or not 60 Alkyl or with at least one R 10a C1-C, whether substituted or not 60 Alkoxy R2 and R3 can be hydrogen, deuterium, or be separated by at least one R. 10a C1-C, whether substituted or not 60 alkyl.

[0032] According to another implementation example, R1 can be hydrogen, deuterium, methyl, ethyl, propyl, butyl, methoxy, or ethoxy. R2 to R3 can be hydrogen, deuterium, methyl, ethyl, propyl, or butyl, each independently of the other.

[0033] According to one embodiment, the sulfone solvent may include tetramethylene sulfone, diphenyl sulfone, ethyl isopropyl sulfone, or any combination thereof.

[0034] According to another implementation example, the sulfone solvent may be tetramethylene sulfone (sulfolane cyclobutane).

[0035] According to one embodiment, the boiling point of the sulfone solvent can be above 200°C. For example, the boiling point of the sulfone solvent can be 200°C to 500°C, 200°C to 450°C, or 200°C to 400°C.

[0036] The sulfone solvent has a boiling point within the aforementioned temperature range, thereby maintaining stability during high-temperature reactions in polyimide film processes and thin-film transistor (TFT) processes.

[0037] According to one embodiment, the amide solvent and the sulfone solvent may be included in the composition in a weight ratio of 1:99 to 99:1. For example, the amide solvent and the sulfone solvent may be included in the composition in a weight ratio of 1:99 to 99:1, 1:95 to 95:1, 1:90 to 90:1, 1:70 to 70:1, 1:50 to 50:1, 1:30 to 30:1, 1:15 to 15:1, 1:10 to 10:1, 1:8 to 8:1, 1:5 to 5:1, 1:4 to 4:1, 1:3 to 3:1, 1:2 to 2:1, or 1:1.

[0038] According to one embodiment, the composition may further include a polymeric product having the polymeric component polymerized.

[0039] According to one embodiment, the polymeric component may be comprised of 5 to 30 parts by weight relative to 100 parts by weight of the composition.

[0040] For example, the polymeric component may be comprised of 5 to 25 parts by weight, 8 to 20 parts by weight, 10 to 20 parts by weight, or 10 to 15 parts by weight relative to 100 parts by weight of the composition.

[0041] According to one embodiment, the first component may contain two or more different diamine compounds.

[0042] According to one embodiment, the diamine compound may include 4,4'-diaminodiphenyl ether, p-phenylenediamine, 2,2'-bis(trifluoromethyl)benzidine, 3,3'-sulfonyldianiline, 4,4'-diaminodiphenyl sulfone, bis[4-(4-aminophenoxy)phenyl]sulfone, 3,4'-diaminodiphenyl ether, 4,4'-(1,3-phenylenedioxy)dianiline, or any combination thereof.

[0043] According to one embodiment, the tetracarboxylic dianhydride may include biphenyl-tetracarboxylic dianhydride, benzophenone tetracarboxylic dianhydride, meso-butane-tetracarboxylic dianhydride, 2,2-bis(3,4-anhydrodicarboxyphenyl)hexafluoropropane dianhydride, 3,3',4,4'-biphenyltetracarboxylic dianhydride, and 3,3',4,4'-diphenylsulfone tetracarboxylic dianhydride. dianhydride), 3,3',4,4'-benzophenone tetracarboxylic dianhydride, or any combination thereof.

[0044] According to one implementation example, the viscosity of the composition can be from 1,000 cP to 20,000 cP.

[0045] When the viscosity is less than 1,000 cP, there is a relatively large amount of low molecular weight and high fluidity during coating, which may result in a thin polyimide film. When the viscosity exceeds 20,000 cP, there is a large amount of high molecular weight and reduced fluidity, which results in a fairly thick film, making it difficult to obtain a suitable thickness for the polyimide film.

[0046] The viscosity of the composition can be measured at 25°C using a Brookfield viscometer (model: DV7TRVCP).

[0047] [Preparation method of polyimide film] According to one embodiment, a method for preparing a polyimide film is provided, comprising the following steps: The composition is coated onto a carrier substrate; and A polyimide film is formed by imidization of the composition by heating. The composition comprises: a first component containing a diamine compound; and a second component containing tetracarboxylic dianhydride; and Solvent, The solvent includes a mixed solvent comprising two or more solvents. The mixed solvent includes amide solvents and sulfone solvents.

[0048] The composition described is the same as that seen in the [Composition] section, and is equally applicable to this [Preparation Method of Polyimide Film].

[0049] According to one embodiment, the step of coating the composition onto a carrier substrate may include the following steps: spin-coating or slot-coating the composition onto the carrier substrate.

[0050] According to one embodiment, the step of heating the composition may be a step of heating the composition at a temperature of 50°C to 500°C.

[0051] Through the heating step, the polymeric component in the composition is imidized, thereby forming a polyimide film.

[0052] According to one embodiment, the step of heating the composition may include the following steps: increasing the temperature from 50°C to 150°C to 400°C to 500°C.

[0053] According to one embodiment, after the step of heating the composition, a step of drying the composition may also be included.

[0054] According to one embodiment, the step of drying the composition can be carried out for 1 minute to 30 minutes.

[0055] [Polyimide film] According to one embodiment, the polyimide film can be prepared by a method for preparing the polyimide film from the composition.

[0056] According to one embodiment, the transmittance of the polyimide film at a wavelength of 450 nm is above 50%.

[0057] The compositions and polyimide films according to the present invention can be used in mixed solvents of amide solvents and sulfone solvents, which are not environmentally restricted solvents.

[0058] Furthermore, the compositions according to the present invention and the polyimide films prepared using the compositions can have improved surface properties and excellent thickness reliability.

[0059] Furthermore, the composition according to the present invention and the polyimide film prepared using the composition have small deviations in stress and strain rate, thereby exhibiting excellent reliability of the polyimide film.

[0060] Therefore, by utilizing the composition according to the present invention and the polyimide film prepared using the composition, high-quality electronic devices and electronic equipment can be provided.

[0061] [Electronic devices and electronic equipment] According to another aspect, an electronic device is provided comprising a polyimide film as described above. The electronic device may further include a thin-film transistor. For example, the electronic device further includes a thin-film transistor comprising a source electrode and a drain electrode, wherein a first electrode of a light-emitting element may be electrically connected to the source electrode or the drain electrode. Additionally, the electronic device may also include a color filter, a color conversion layer, a touchscreen layer, a polarizing layer, or any combination thereof. For a more detailed description of the electronic device, refer to the contents described in this specification.

[0062] According to another aspect, as an electronic device including the aforementioned polyimide film and / or electronic device, it can provide one of the following: flat panel display, curved display, computer monitor, medical display, television, billboard, indoor or outdoor lighting and / or signal lights, head-up display, fully transparent or partially transparent display, flexible display, rollable display, foldable display, stretchable display, laser printer, telephone, portable telephone, tablet computer, tablet phone, personal digital assistant (PDA), wearable device, laptop computer, digital camera, camcorder, viewfinder, microdisplay, 3D display, virtual reality or augmented reality display, vehicle, video wall including multiple displays tiled together, theater or stadium screen, phototherapy equipment, and signage.

[0063] [against Figure 1 and Figure 2 [Explanation] Figure 1 This is a cross-sectional view of a light-emitting device (electronic device) according to an embodiment of the present invention.

[0064] Figure 1 The light-emitting device includes a substrate 100, a thin-film transistor (TFT), a light-emitting element, and a package 300 that seals the light-emitting element.

[0065] The substrate 100 may be a polyimide film according to the present invention.

[0066] A buffer layer 210 may be disposed on the substrate 100. The buffer layer 210 can prevent impurities from penetrating through the substrate 100 and can also provide a flat surface on the upper part of the substrate 100.

[0067] A thin-film transistor (TFT) may be disposed on the buffer layer 210. The thin-film transistor (TFT) may include an active layer 220, a gate electrode 240, a source electrode 260, and a drain electrode 270.

[0068] The active layer 220 may include inorganic semiconductors, organic semiconductors, or oxide semiconductors such as silicon or polysilicon, and includes a source region, a drain region, and a channel region.

[0069] A gate insulating film 230 for insulating the active layer 220 from the gate electrode 240 may be arranged on the upper part of the active layer 220, and the gate electrode 240 may be arranged on the upper part of the gate insulating film 230.

[0070] An interlayer insulating film 250 may be disposed on the upper part of the gate electrode 240. The interlayer insulating film 250 is disposed between the gate electrode 240 and the source electrode 260 and between the gate electrode 240 and the drain electrode 270 to insulate them.

[0071] An active electrode 260 and a drain electrode 270 may be disposed on the interlayer insulating film 250. The interlayer insulating film 250 and the gate insulating film 230 may be formed to expose the source and drain regions of the active layer 220, and the source electrode 260 and the drain electrode 270 may be arranged to contact the exposed source and drain regions of the active layer 220.

[0072] The thin-film transistor (TFT) described above can be electrically connected to a light-emitting element to drive the light-emitting element and is protected by a passivation layer 280. The passivation layer 280 may include an inorganic insulating film, an organic insulating film, or a combination thereof. A light-emitting element is disposed on the passivation layer 280. The light-emitting element includes a first electrode 110, an intermediate layer 130, and a second electrode 150.

[0073] The first electrode 110 may be disposed on the passivation layer 280. The passivation layer 280 may be disposed in such a way that a predetermined area is exposed without covering the entire drain electrode 270, and the first electrode 110 may be disposed to be connected to the exposed drain electrode 270.

[0074] A pixel defining film 290, including an insulating material, may be disposed on the first electrode 110. The pixel defining film 290 may expose a predetermined area of ​​the first electrode 110, and an intermediate layer 130 may be formed in the exposed area. The pixel defining film 290 may be a polyimide or polyacrylic acid-based organic film. Although not explicitly stated... Figure 2 As shown, a portion or more of the intermediate layers 130 can extend to the upper part of the pixel defining film 290 and be arranged in the form of a common layer.

[0075] A second electrode 150 may be disposed on the intermediate layer 130, and a cover layer 170 may be additionally formed on the second electrode 150. The cover layer 170 may be formed to cover the second electrode 150.

[0076] An encapsulation portion 300 may be disposed on the cover layer 170. The encapsulation portion 300 may be disposed on the light-emitting element and serves to protect the light-emitting element from moisture or oxygen. The encapsulation portion 300 may include an inorganic film, including silicon nitride (SiN). x ), silicon oxide (SiO) x Indium tin oxide, indium zinc oxide, or any combination thereof; organic membranes, including polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyethylene sulfonate, polyoxymethylene, polyarylate, hexamethyldisiloxane, acrylic resins (e.g., polymethyl methacrylate, polyacrylic acid, etc.), epoxy resins (e.g., aliphatic glycidyl ether, etc.) or any combination thereof; or combinations of inorganic and organic membranes.

[0077] Figure 2 This is a cross-sectional view of a light-emitting device according to another embodiment of the present invention.

[0078] Apart from the fact that the light-blocking pattern 500 and the functional area 400 are additionally arranged on the upper part of the packaging section 300, Figure 2 The light-emitting device and Figure 1 The light-emitting device is the same as the light-emitting device. The functional region 400 can be: i) a color filter region; ii) a color conversion region; or iii) a combination of a color filter region and a color conversion region. According to one implementation example, it includes... Figure 2 The light-emitting element of the light-emitting device can be a series of light-emitting elements.

[0079] [against Figure 3 [Explanation] Figure 3 This is a block diagram of an electronic device 1 based on an implementation example. (Refer to...) Figure 3 According to one embodiment, the electronic device 1 may include a light-emitting module 11, a processor 12, a memory 13, and a power supply module 14.

[0080] The processor 12 may include at least one of a central processing unit (CPU), an application processor (AP), a graphics processing unit (GPU), a communication processor (CP), an image signal processor (ISP), and a controller.

[0081] The memory 13 can store the data information required for the operation of the processor 12 or the light-emitting module 11. If the processor 12 runs the application stored in the memory 13, the image data signal and / or input control signal can be transmitted to the light-emitting module 11, and the light-emitting module 11 can process the received signal and output the image information through the display screen.

[0082] The power module 14 may include a power supply module such as a power adapter or battery device and a power conversion module that converts the power supplied by the power supply module to generate the power required for the operation of the electronic device 1.

[0083] At least one of the various components of the electronic device 1 described above may be included within the light-emitting device according to the above embodiments. Furthermore, some modules that are functionally included within a single module may be included within the light-emitting device, while other modules may be provided independently of the light-emitting device. For example, the light-emitting device may include a light-emitting module 11, while the processor 12, memory 13, and power module 14 may be provided in the form of other devices within the electronic device 1 that are not light-emitting devices.

[0084] [against Figure 4 [Explanation] Figure 4 These are schematic diagrams of electronic devices based on various implementation examples.

[0085] Reference Figure 4 The various electronic devices that use electronic devices (e.g., light-emitting devices) can include not only electronic devices for displaying images (smartphones 1_1a, tablet PCs 1_1b, laptops 1_1c, televisions (TVs) 1_1d, desktop displays 1_1e, etc.), but also wearable electronic devices that include light-emitting modules 11 (such as smart glasses 1_2a, head-mounted displays 1_2b, smartwatches 1_2c, etc.), and vehicle electronic devices 1_3 that include light-emitting modules 11 (such as car dashboards, center fascias, center information displays (CID) arranged on the dashboard, room mirror displays, etc.).

[0086] [against Figure 5 [Explanation] Figure 5This is a schematic perspective view of an electronic device 1 including a polyimide film according to an embodiment of the present invention. The electronic device 1, as a device for displaying moving or still images, can be not only portable electronic devices such as mobile phones, smartphones, tablet personal computers, mobile communication terminals, electronic manuals, e-books, portable multimedia players (PMPs), navigators, and ultra-portable mobile PCs (UMPCs), but also various products or parts thereof such as televisions, laptops, monitors, billboards, or Internet of Things (IoT) devices. Furthermore, the electronic device 1 can be a wearable device or part thereof such as a smartwatch, watch phone, glasses-type display, or head-mounted display (HMD). Of course, the present invention is not limited thereto. For example, the electronic device 1 may include a central information display (CID) disposed on the dashboard and center fascia or instrument panel of the vehicle; an interior mirror display replacing the side mirrors of the vehicle; a rear-seat entertainment device or a display disposed on the back of the front seats; a head-up display (HUD) disposed in front of the vehicle or projected onto the windshield; or a holographic augmented reality head-up display (CGH AR HUD). For ease of explanation, Figure 5 This illustrates the case where the electronic device 1 is a smartphone.

[0087] The electronic device 1 may include a display area DA and a non-display area NDA outside the display area DA. The display device can realize an image by an array of multiple pixels arranged in two dimensions in the display area DA.

[0088] The non-display area NDA, as an area where no image is displayed, can completely surround the display area DA. Drivers and the like, used to provide electrical signals or power to display elements arranged in the display area DA, can be arranged within the non-display area NDA. Pads can also be arranged within the non-display area NDA as areas capable of electrically connecting electronic components or printed circuit boards.

[0089] The lengths of the electronic device 1 along the x-axis and y-axis can be different from each other. For example, as Figure 5 As illustrated, the length in the x-axis direction can be shorter than the length in the y-axis direction. In another example, the length in the x-axis direction can be the same as the length in the y-axis direction. In yet another example, the length in the x-axis direction can be longer than the length in the y-axis direction.

[0090] [right Figure 6 and 7a [Explanation up to 7c] Figure 6 This is a schematic diagram showing the exterior of a vehicle 1000, which is an electronic device including a polyimide film according to one embodiment of the present invention. Figures 7a to 7c This is a schematic diagram showing the interior of a vehicle 1000 according to various implementations of the present invention.

[0091] Reference Figure 6 , Figure 7a , Figure 7b as well as Figure 7c Vehicle 1000 can refer to a variety of devices that move a transported object, such as a person, object, or animal, from a point of origin to a destination. Vehicle 1000 can include vehicles that travel on roads or tracks, ships that move on the sea or river, and aircraft that fly in the sky using the action of air.

[0092] Vehicle 1000 can travel on roads or tracks. Vehicle 1000 can move in a predetermined direction depending on the rotation of at least one wheel. For example, vehicle 1000 may include three-wheeled or four-wheeled vehicles, construction machinery, two-wheeled vehicles, prime movers, bicycles, and trains traveling on tracks.

[0093] Vehicle 1000 may include a body with internal and external devices, and a chassis, which is the remaining part excluding the body, and is equipped with the mechanical devices required for driving. The external devices of the body may include a front skid plate, hood, roof panel, rear skid plate, trunk, and pillars located at the boundaries between doors. The chassis of vehicle 1000 may include a power generation device, a power transmission device, a running gear, a steering device, a braking device, a suspension device, a transmission device, a fuel system, and front, rear, left, and right wheels.

[0094] Vehicle 1000 may include side window glass 1100, front window glass 1200, side mirror 1300, instrument cluster 1400, central instrument panel 1500, passenger seat instrument panel 1600, and display device 2.

[0095] The side window glass 1100 and the front window glass 1200 can be separated by a pillar arranged between the side window glass 1100 and the front window glass 1200.

[0096] Side window 1100 may be disposed on the side of vehicle 1000. In one embodiment, side window 1100 may be disposed on a door of vehicle 1000. Multiple side windows 1100 may be provided and may face each other. In one embodiment, side window 1100 may include a first side window 1110 and a second side window 1120. In one embodiment, the first side window 1110 may be arranged adjacent to instrument panel 1400. The second side window 1120 may be arranged adjacent to passenger-side instrument panel 1600.

[0097] In one embodiment, the side window panes 1100 may be spaced apart from each other along the x-axis or the -x-axis. For example, the first side window pane 1110 and the second side window pane 1120 may be spaced apart from each other along the x-axis or the -x-axis. In other words, the virtual straight line L connecting the side window panes 1100 may extend along the x-axis or the -x-axis. For example, the virtual straight line L connecting the first side window pane 1110 and the second side window pane 1120 may extend along the x-axis or the -x-axis.

[0098] The front windshield 1200 can be positioned in front of the vehicle 1000. The front windshield 1200 can be positioned between the side windows 1100 facing each other.

[0099] The side mirror 1300 provides a rearward view of the vehicle 1000. The side mirror 1300 can be an external device mounted on the vehicle body. In one embodiment, multiple side mirrors 1300 can be provided. One of the multiple side mirrors 1300 can be positioned on the outer side of the first side window 1110. Another of the multiple side mirrors 1300 can be positioned on the outer side of the second side window 1120.

[0100] The instrument panel 1400 can be located in front of the steering wheel. The instrument panel 1400 can include a tachometer, speedometer, coolant temperature gauge, fuel gauge, steering wheel indicator, high beam indicator, warning lights, seat belt warning lights, odometer, dashcam, automatic transmission selector lever indicator, door open warning light, oil warning light and / or low fuel warning light.

[0101] The center dashboard 1500 may include a control panel with multiple buttons for adjusting audio equipment, air conditioning equipment, and seat heaters. The center dashboard 1500 may be located on one side of the instrument panel 1400.

[0102] The passenger-side instrument panel 1600 may be separated from the instrument cluster 1400 by the center instrument panel 1500. In one embodiment, the instrument cluster 1400 may be arranged corresponding to the driver's seat (not shown), and the passenger-side instrument panel 1600 may be arranged corresponding to the passenger seat (not shown). In one implementation, the instrument cluster 1400 may be adjacent to the first side window 1110, and the passenger-side instrument panel 1600 may be adjacent to the second side window 1120.

[0103] In one embodiment, the display device 2 may include a display panel 3 that can display images. The display device 2 may be arranged inside the vehicle 1000. In one embodiment, the display device 2 may be arranged between side windows 1100 facing each other. The display device 2 may be arranged in at least one of the instrument panel 1400, the center instrument panel 1500, and the passenger-side instrument panel 1600.

[0104] Display device 2 may include organic light-emitting display devices, inorganic electroluminescent display devices, quantum dot display devices, etc. Hereinafter, an organic light-emitting display device including the polyimide film according to the present invention will be used as an example to describe display device 2 according to one embodiment of the present invention; however, in embodiments of the present invention, display devices of various types as described above may be used.

[0105] Reference Figure 7a The display device 2 can be arranged in the central instrument panel 1500. In one embodiment, the display device 2 can display navigation information. In another embodiment, the display device 2 can display information related to audio, video, or vehicle settings.

[0106] Reference Figure 7b The display device 2 can be arranged on the instrument panel 1400. In this case, the instrument panel 1400 can display operating information, etc., via the display device 2. That is, the instrument panel 1400 can be implemented digitally. The digital instrument panel 1400 can display vehicle information and driving information as images. For example, the tachometer needle and gauges and various warning light icons can be displayed via digital signals.

[0107] Reference Figure 7cThe display device 2 can be arranged in the passenger-side instrument panel 1600. The display device 2 can be embedded in the passenger-side instrument panel 1600 or located on the passenger-side instrument panel 1600. In one embodiment, the display device 2 arranged in the passenger-side instrument panel 1600 can display images related to the information displayed on the instrument panel 1400 and / or the information displayed on the central instrument panel 1500. In another embodiment, the display device 2 arranged in the passenger-side instrument panel 1600 can display information different from the information displayed on the instrument panel 1400 and / or the information displayed on the central instrument panel 1500.

[0108] [Definition of the term] In this specification, C3-C 60 A carbocyclic group is a cyclic group consisting of 3 to 60 carbon atoms, formed using only carbon as the ring-forming atom. (C1-C) 60 Heterocyclic groups refer to cyclic groups with 1 to 60 carbon atoms, including heteroatoms as cyclic atoms in addition to carbon. The C3-C... 60 Carbocyclic groups and C1-C 60 Heterocyclic groups can be either monocyclic groups consisting of a single ring or polycyclic groups consisting of two or more rings condensed together. For example, the C1-C 60 The number of cyclic atoms in a heterocyclic group can range from 3 to 61.

[0109] In this specification, the cyclic group includes the C3-C... 60 Carbocyclic groups and C1-C 60 Both heterocyclic groups.

[0110] In this specification, the π-electron-rich C3-C 60 Cyclic groups (π electron-rich C3-C) 60 (cyclic group) refers to a group that does not include -N= 'Cyclic groups with 3 to 60 carbon atoms as the cyclic moiety, nitrogen-containing C1-C atoms that are depleted of π electrons.' 60 Cyclic groups (π electron-deficient nitrogen-containing C1-C) 60 A cyclic group refers to a group that includes -N= Heterocyclic groups having 1 to 60 carbon atoms as the cyclic moiety.

[0111] For example, The C3-C 60The carbocyclic group can be: i) group T1; or ii) a condensed cyclic group formed by the condensation of two or more groups T1 (e.g., cyclopentadienyl group, adamantyl group, norbornel group, phenyl group, pentene group, naphthyl group, chamomile ring group, indane group, acenaphthene group, phenanthracene group, anthracene group, fluoranthracene group, benzo[9,10]phenanthracene group, pyrene group, sine group, perylene group, pentanene group, heptaphenene group, tetraphenyl group, sine group, hexaphenyl group, pentaphenyl group, rubidium group, benzo[9,10]phenanthracene group, ovoid group, indene group, fluorene group, spirodifluorene group, benzo[1]fluorene group, ind[2]phenanthracene group or ind[2]anthracene group). The C1-C 60 The heterocyclic group can be: i) group T2; ii) a condensed ring group formed by the condensation of two or more groups T2; or iii) a condensed ring group formed by the condensation of one or more groups T2 and one or more groups T1 (e.g., pyrrole group, thiophene group, furan group, indole group, benzoindole group, naphthoindole group, isoindole group, benzoisoindole group, naphthoisoindole group, benzothiophene group, benzofuran group, carbazole group, dibenzothiophene group, dibenzothiophene group, dibenzofuran group, indolecarbazole group, indolecarbazole group, benzofuran-carbazole group, benzothiophenecarbazole group, benzothiophenecarbazole group, benzoindolecarbazole group, benzocarbazole group, benzonaphthiophene group, benzonaphthiophene group, benzofuran-dibenzofuran group, benzofuran-dibenzothiophenecarbazole group). Phenoyl group, benzothiophene-dibenzothiophene group, pyrazole group, imidazole group, triazole group, oxazole group, isoxazole group, oxadiazole group, thiazole group, isothiazole group, thiaazole group, thiadiazole group, benzopyrazole group, benzimidazole group, benzoxazole group, benziisoxazole group, benzothiazole group, benziisothiazole group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, quinoline group, isoquinoline group, benzene (e.g., benzo[i](x)-quinoline group, benzo[i](x)-isoquinoline group, quinoxaloline group, benzo[i](x)-quinoxaloline group, quinoxaloline group, benzo[i](x)-quinoxaloline group, phenanthrene group, cinnaphthyl group, phthalazine group, naphthidine group, imidazo[i](x)-pyridine group, imidazo[i](x)-pyrimidine group, imidazo[i](x)-triazine group, imidazo[i](x)-pyrazine group, imidazo[i](x)-pyridazine group, azacarbazole group, azafluorene group, azadibenzo[i](x)-thiophene group, azadibenzo[i](x)-thiophene group, azadibenzo[i](x)-furan group, etc.) The π-electron-rich C3-C 60 The cyclic group can be: i) group T1; ii) a condensed cyclic group consisting of two or more groups T1 condensed together; iii) group T3; iv) a condensed cyclic group consisting of two or more groups T3 condensed together; or v) a condensed cyclic group consisting of one or more groups T3 and one or more groups T1 condensed together (e.g., the C3-C group). 60Carbocyclic groups, 1H-pyrrole groups, thiorrole groups, borole groups, 2H-pyrrole groups, 3H-pyrrole groups, thiophene groups, furan groups, indole groups, benzoindole groups, naphthoindole groups, isoindole groups, benzoisoindole groups, naphthoisoindole groups, benzothiorrole groups, benzothiophene groups, benzofuran groups, carbazole groups, dibenzothiorrole groups, dibenzothiophene groups, dibenzofuran groups, indole-carbazole groups, indole-carbazole groups, benzofuran-carbazole groups, benzothiophene-carbazole groups, benzothiorrole-carbazole groups, benzoindole-carbazole groups, benzocarbazole groups, benzonaphthiophene groups, benzonaphthiorrole groups, benzofuran-dibenzofuran groups, benzofuran-dibenzothiophene groups, benzothiophene-dibenzothiophene groups, etc. The nitrogen-containing C1-C with depleted π electrons 60 The cyclic group can be: i) group T4; ii) a condensed cyclic group formed by the condensation of two or more groups T4; iii) a condensed cyclic group formed by the condensation of one or more groups T4 and one or more groups T1; iv) a condensed cyclic group formed by the condensation of one or more groups T4 and one or more groups T3; or v) a condensed cyclic group formed by the condensation of one or more groups T4, one or more groups T1, and one or more groups T3 (e.g., pyrazole group, imidazole group, triazole group, oxazole group, isoxazole group, oxadiazole group, thiazole group, isothiazole group, thiadiazole group, benzopyrazole group, benzimidazole group, etc.). Benzooxazole group, benzisooxazole group, benzothiazole group, benzisothiazole group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, quinoline group, isoquinoline group, benzoquinoline group, benzoisoquinoline group, quinoxaline group, benzoquinoxaline group, quinazoline group, benzoquinazoline group, phenanthrene group, cinnamyl group, phthalazine group, naphthidine group, imidazopyridine group, imidazopyrimidine group, imidazotriazine group, imidazopyrazine group, imidazopyridazine group, imidazopyridazine group, azacarbazole group, azafluorene group, azadibenzothiophene group, azadibenzothiophene group, azadibenzofuran group, etc. The group T1 can be a cyclopropane group, a cyclobutane group, a cyclopentane group, a cyclohexane group, a cycloheptane group, a cyclooctane group, a cyclobutene group, a cyclopentene group, a cyclopentadiene group, a cyclohexene group, a cyclohexadiene group, adamantane group, norbornane (or bicyclo[2.2.1]heptane) group, norbornene group, a bicyclo[1.1.1]pentane group, a bicyclo[2.1.1]hexane group, a bicyclo[2.2.2]octane group, or a phenyl group. The group T2 can be a furan group, thiophene group, 1H-pyrrole group, thiorrole group, borole group, 2H-pyrrole group, 3H-pyrrole group, imidazole group, pyrazole group, triazole group, tetraazole group, oxazole group, isoxazole group, oxadiazole group, thiazole group, isothiazole group, thiadiazole group, azathiazole group, azaborole group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, tetraazine group, pyrrolidinyl group, imidazolealkyl group, dihydropyrrole group, piperidine group, tetrahydropyridine group, dihydropyridine group, hexahydropyrimidine group, tetrahydropyrimidine group, dihydropyrimidine group, piperidine group, tetrahydropyrazine group, dihydropyrazine group, tetrahydropyridazine group, or dihydropyridazine group. The group T3 can be a furan group, a thiophene group, a 1H-pyrrole group, a thiophene group, or a borole group, and The group T4 can be a 2H-pyrrole group, a 3H-pyrrole group, an imidazole group, a pyrazole group, a triazole group, a tetraazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, an azathiazole group, an azaboranecyclopentadiene group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, or a tetraazine group.

[0112] The terms cyclic group, C3-C in this specification 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, π-electron-rich C3-C 60 Cyclic groups or nitrogen-containing C1-C groups with depleted π electrons 60A cyclic group refers to a group whose structure, according to the chemical formula used in this term, is condensed with any cyclic group. It can be a monovalent group or a polyvalent group (e.g., a divalent group, a trivalent group, a tetravalent group, etc.). For example, a "phenyl group" can be a benzo[a] group, a phenyl group, a phenylene group, etc., which can be readily understood by those skilled in the art based on the structure of a chemical formula that includes a "phenyl group".

[0113] For example, unit price C3-C 60 Carbocyclic groups and monovalent C1-C 60 Examples of heterocyclic groups can include C3-C 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heterocyclic groups; divalent C3-C 60 Carbocyclic groups and divalent C1-C 60 Examples of heterocyclic groups can include C3-C 10 Cycloalkylene, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkylene, C1-C 10 Heterocyclic alkenyl, C6-C 60 aryl, C1-C 60 Hypoaryl groups, divalent non-aromatic condensed polycyclic groups, and divalent non-aromatic condensed heterocyclic groups.

[0114] In this specification, C1-C 60 Alkyl groups refer to monovalent groups in straight-chain or branched aliphatic hydrocarbons having 1 to 60 carbon atoms. Specific examples include methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, tert-pentyl, neopentyl, isopentyl, sec-pentyl, 3-pentyl, sec-isopentyl, n-hexyl, isohexyl, sec-hexyl, tert-hexyl, n-heptyl, isohexyl, sec-heptyl, tert-heptyl, n-octyl, isooctyl, sec-octyl, tert-octyl, n-nonyl, isononyl, sec-nonyl, tert-nonyl, n-decyl, isodel, sec-decyl, tert-decyl, etc. The C1-C groups in this specification... 60 Alkylene refers to a group having a C1-C... 60 Divalent groups with the same structure as alkyl groups.

[0115] In this specification, C2-C 60 Alkenyl refers to the group at C2-C 60The alkyl group includes one or more monovalent hydrocarbon groups comprising a carbon-carbon double bond in the middle or at the end; specific examples include vinyl, propenyl, butenyl, etc. In this specification, C2-C... 60 alkenyl groups refer to those having a similar structure to the C2-C group. 60 Divalent groups with the same structure as alkenyl groups.

[0116] In this specification, C2-C 60 Alkyne refers to the group at C2-C 60 Alkyl groups, either in the middle or at the end, include one or more monovalent hydrocarbon groups comprising a carbon-carbon triple bond; specific examples include ethynyl and propynyl groups. In this specification, C2-C... 60 The alkynyl group refers to the group having a similar structure to the C2-C group. 60 Divalent groups with the same structure as alkynyl groups.

[0117] In this specification, C1-C 60 Alkoxy groups refer to those with -OA 101 (where A) 101 It is the C1-C 60 Alkyl groups are monovalent groups in the chemical formula of alkyl groups, and specific examples include methoxy, ethoxy, isopropoxy, etc.

[0118] In this specification, C3-C 10 Cycloalkyl refers to a monovalent saturated hydrocarbon cyclic group with 3 to 10 carbon atoms. Specific examples include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantanyl, norbornanyl (or bicyclo[2.2.1]heptyl), bicyclo[1.1.1]pentyl, bicyclo[2.1.1]hexyl, bicyclo[2.2.2]octyl, etc. In this specification, C3-C 10 Cycloalkylene refers to compounds with C3-C66 atoms. 10 Divalent groups with the same structure as cycloalkyl groups.

[0119] In this specification, C1-C 10 Heterocyclic alkyl groups refer to monovalent cyclic groups with 1 to 10 carbon atoms, including at least one heteroatom as a cyclic atom in addition to carbon atoms. Specific examples include 1,2,3,4-oxatriazolidinyl, tetrahydrofuranyl, tetrahydrothiophenyl, etc. In this specification, C1-C 10 Heterocyclic alkyl refers to a group having a C1-C2 structure similar to the aforementioned C1-C2. 10 Divalent groups with the same structure as heterocyclic alkyl groups.

[0120] In this specification, C3-C 10 Cycloalkenyl groups refer to monovalent cyclic groups with 3 to 10 carbon atoms. They represent groups containing at least one carbon-carbon double bond within the ring but lacking aromaticity. Specific examples include cyclopentenyl, cyclohexenyl, and cycloheptenyl. In this specification, C3-C... 10 Cycloalkylene refers to the group that is related to the C3-C 10 Cycloalkenyl groups are divalent groups with the same structure.

[0121] In this specification, C1-C 10 Heterocyclic alkenyl groups refer to monovalent cyclic groups with 1 to 10 carbon atoms, including at least one heteroatom as a cyclic atom in addition to carbon atoms, and possessing at least one double bond within the ring. The C1-C... 10 Specific examples of heterocyclic alkenyl groups include 4,5-dihydro-1,2,3,4-oxarizolyl, 2,3-dihydrofuranyl, 2,3-dihydrothiophenyl, etc. In this specification, C1-C... 10 Heterocyclic alkenyl groups refer to those having the same structure as the C1-C1 group. 10 Divalent groups with the same structure as heterocyclic alkenyl groups.

[0122] In this specification, C6-C 60 Aryl groups are monovalent groups in carbocyclic aromatic systems with 6 to 60 carbon atoms, C6-C. 60 A aryl group refers to a divalent group in a carbocyclic aromatic system having 6 to 60 carbon atoms. The C6-C... 60 Specific examples of aryl groups include phenyl, cyclopentadienyl, naphthyl, chamomilecycloyl, indole, acenaphthel, phenanthyl, anthracene, fluoranthyl, benzo[9,10]phenanthyl, pyrene, cyclopentyl, perylene, pentylenyl, hepta-enyl, tetraphenyl, stylenyl, hexaphenyl, pentaphenyl, rubiginyl, closanyl, ovylphenyl, etc. In the C6-C... 60 Aryl and C6-C 60 When a aryl group comprises two or more rings, the two or more rings can be condensed together.

[0123] In this specification, C1-C 60 A heteroaryl group is a monovalent group in a heterocyclic aromatic system that includes at least one heteroatom as a cyclic atom in addition to a carbon atom and has 1 to 60 carbon atoms, C1-C. 60 A heteroaryl group refers to a divalent group in a heterocyclic aromatic system that, in addition to a carbon atom, includes at least one heteroatom as a cyclic atom and has 1 to 60 carbon atoms. The C1-C... 60Specific examples of heteroaryl groups include pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolinyl, benzo[a]quinolinyl, isoquinolinyl, benzo[a]isoquinolinyl, quinoxalinyl, benzo[a]quinoxalinyl, quinazolinyl, benzo[a]quinazolinyl, cenolinyl, phenanthrolinel, phthalazinyl, naphthidyl, etc. In the C1-C... 60 heteroaryl and C1-C 60 When a heteroaryl group comprises two or more rings, the two or more rings can condense together.

[0124] In this specification, a monovalent non-aromatic condensed polycyclic group refers to a monovalent group in which two or more rings are condensed together, and the cyclic atoms consist only of carbon atoms, and the entire molecule possesses non-aromaticity (e.g., having 8 to 60 carbon atoms). Specific examples of such monovalent non-aromatic condensed polycyclic groups include indenyl, fluorenyl, spirodifluorenyl, benzo[a]fluorenyl, indo[a]phenanthryl, indo[a]anthrayl, etc. In this specification, a divalent non-aromatic condensed polycyclic group refers to a divalent group having the same structure as the monovalent non-aromatic condensed polycyclic group.

[0125] In this specification, a non-aromatic condensed heteropolycyclic group refers to a group of two or more rings condensed together, which includes at least one heteroatom as a cyclic atom in addition to carbon atoms, and the entire molecule is a non-aromatic monovalent group (e.g., having 1 to 60 carbon atoms). Specific examples of the monovalent non-aromatic condensed heterocyclic groups include pyrrolyl, thiophene, furanyl, indoleyl, benzoindoleyl, naphthoindoleyl, isoindoleyl, benzoisoindoleyl, naphthoisoindoleyl, benzothiophene, benzofuranyl, carbazoleyl, dibenzothiophene, dibenzofuranyl, azacarbazoleyl, azafluorenyl, azadibenzothiophene, azadibenzothiophene, azadibenzofuranyl, pyrazolyl, imidazolyl, triazolyl, tetrazolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, isothiazolyl, oxadiazolyl, and thiadiazole. The term "divalent non-aromatic condensed heterocyclic group" refers to a divalent group having the same structure as the monovalent non-aromatic condensed heterocyclic group. In this specification, a divalent non-aromatic condensed heterocyclic group refers to a divalent group having the same structure as the monovalent non-aromatic condensed heterocyclic group.

[0126] In this specification, C6-C 60 Aryloxy group refers to -OA 102 (where A) 102 It is the C6-C 60 Aryl), the C6-C 60 Arylthio refers to -SA 103 (where A) 103 It is the C6-C 60 Aryl).

[0127] In this instruction manual, "C7-C" 60 "Arylalkyl" refers to -A 104 A 105 (where A) 104 It is C1-C 54 Alkylene, A 105 It is C6-C 59 Aryl), C2-C in this specification 60 Heteroarylalkyl refers to -A 106 A 107 (where A)106 It is C1-C 59 Alkylene, A 107 It is C1-C 59 (Mild aryl).

[0128] In this specification, "R" 10a "Can be: Deuterium (-D), -F, -Cl, -Br, -I, hydroxyl, cyano, or nitro; Deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 Heteroaryloxy, C1-C 60 heteroaryl thiols, C7-C 60 Arylalkyl, C2-C 60 heteroarylalkyl, -Si(Q) 11 (Q) 12 (Q) 13 -N(Q) 11 (Q) 12 -B(Q) 11 (Q) 12 -C(=O)(Q) 11 -S(=O)2(Q) 11 -P(=O)(Q) 11 (Q) 12 ) or any combination thereof replacing or not replacing C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 Alkyne group or C1-C 60 Alkoxy; The following groups are used: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 Alkoxy, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 Heteroaryloxy, C1-C 60 heteroaryl thiols, C7-C 60 Arylalkyl, C2-C 60 heteroarylalkyl, -Si(Q) 21 (Q)22 (Q) 23 -N(Q) 21 (Q) 22 -B(Q) 21 (Q) 22 -C(=O)(Q) 21 -S(=O)2(Q) 21 -P(=O)(Q) 21 (Q) 22 C3-C, or any combination thereof, may or may not be substituted. 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 Heteroaryloxy, C1-C 60 heteroaryl thiols, C7-C 60 arylalkyl or C2-C 60 heteroarylalkyl; or -Si(Q 31 (Q) 32 (Q) 33 -N(Q) 31 (Q) 32 -B(Q) 31 (Q) 32 -C(=O)(Q) 31 -S(=O)2(Q) 31 ), or -P(=O)(Q 31 (Q) 32 ).

[0129] In this specification, Q1 to Q3, Q 11 To Q 13 Q 21 To Q 23 And Q 31 To Q 33 They can be, independently, hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl; cyano; nitro, or combined with deuterium, -F, cyano, C1-C. 60 Alkyl, C1-C 60 Alkoxy, phenyl, biphenyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, triazinyl or any combination thereof substituted or unsubstituted C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 Alkoxy, C1-C 60 Alkylthio, C3-C 60 Carbocyclic groups, C1-C 60Heterocyclic groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C7-C 60 arylalkyl or C2-C 60 Heteroarylalkyl.

[0130] In this specification, a heteroatom refers to any atom other than a carbon atom. Examples of heteroatoms include O, S, N, P, Si, B, Ge, Se, or any combination thereof.

[0131] In this specification, "Ph" refers to phenyl, "Me" refers to methyl, "Et" refers to ethyl, and "tert-Bu" or "Bu" refers to ethyl. t "" refers to tert-butyl, and "OMe" refers to methyl methacrylate (MMA).

[0132] In this specification, "biphenyl" refers to a "phenyl group substituted with a phenyl group". The "biphenyl" belongs to the category where the substituent is "C6-C". 60 "Aryl" is "substituted phenyl".

[0133] In this specification, "terphenyl" refers to "a phenyl group substituted with a biphenyl group". The "terphenyl" belongs to the category where the substituent is "C6-C". 60 Aryl-substituted C6-C 60 "Aryl" is "substituted phenyl".

[0134] In this specification, unless otherwise defined, and 'Refers to the binding site of an adjacent atom in the corresponding chemical formula or part thereof.

[0135] In this specification, the x-axis, y-axis, and z-axis are not limited to the three axes of a rectangular coordinate system, but can be interpreted to include the broad meaning of these axes. For example, the x-axis, y-axis, and z-axis can be orthogonal to each other, or they can refer to different directions that are not orthogonal to each other.

[0136] [Example] Example 1: Preparation of polyimide film A polyamic acid composition with a solid content of 12% was formed by mixing biphenyl-tetracarboxylic dianhydride, 4,4′-diaminodiphenyl ether, and p-phenylenediamine in a solvent containing N,N-dimethylpropionamide and sulfolane (tetramethylene sulfone) in an 8:2 ratio and in a molar ratio of 2:1:1. The polyamic acid composition was then coated onto a glass substrate (carrier substrate) using a slot coater. The prepared film was heated from 100°C to 450°C at a rate of 8°C / min, dried at 450°C for 10 minutes, and then imidized to obtain a 10 μm polyimide film.

[0137] Examples 2, 3, and Comparative Examples 1 to 3 When forming the polyamic acid composition, the polyimide film was prepared using the same method as in Example 1, except that the solvent described in Table 1 was used instead of the solvent used to mix N,N-dimethylpropionamide and sulfolane in an 8:2 ratio.

[0138] Evaluation Example 1: Surface Properties The surface state of the polyimide films of Examples 1 to 3 and Comparative Examples 1 to 3 was confirmed, and the results are shown in Table 1 below.

[0139] The surface condition of polyimide films is based on the number of bubbles generated on the surface and is expressed as A (≤1), B (≤3), or C (>3).

[0140] The fewer bubbles generated on the surface, the better the surface properties.

[0141] Evaluation Example 2: Thickness Characteristics The thickness characteristics of the polyimide films of Examples 1 to 3 and Comparative Examples 1 to 3 were confirmed, and the results are shown in Table 1 below.

[0142] The thickness of the polyimide film was measured using a spectroscopic reflectometer, and the thickness was measured at nine points on the substrate, with the deviation of the film at each point calculated.

[0143] [Table 1]

[0144] Referring to Table 1 above, it was confirmed that the surface properties of the polyimide film according to the present invention using the mixed solvents of Examples 1 to 3 were superior to the surface properties of the polyimide films of Comparative Examples 1 to 3.

[0145] Furthermore, the standard deviation of the thickness of the polyimide film according to the present invention using the mixed solvents of Examples 1 to 3 is lower than that of the polyimide films of Comparative Examples 1 to 3, thus confirming that the thickness of the polyimide film according to the present invention is of very high reliability.

[0146] The embodiments of the present invention are merely illustrative, and those skilled in the art will understand that various modifications and equivalent embodiments can be achieved therefrom. Therefore, the true scope of protection of the present invention should be determined by the technical concept described in the claims.

Claims

1. A composition comprising: The polymeric component includes: a first component comprising a diamine compound; and a second component comprising a tetracarboxylic dianhydride; and Solvent, The solvent includes a mixed solvent comprising two or more solvents. The mixed solvent includes amide solvents and sulfone solvents.

2. The composition of claim 1, wherein, The amide solvents include N,N-dimethylpropionamide, 3-methoxy-N,N-dimethylpropionamide, N-methylpropionamide, N,N-diethylformamide, or any combination thereof.

3. The composition of claim 1, wherein, The amide solvents include compounds represented by the following chemical formula 1: <Chemical Formula 1> ， In the chemical formula 1, R1 to R3 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, or bound by at least one R. 10a C1-C, whether substituted or not 60 Alkyl, with at least one R 10a C2-C, whether substituted or not 60 alkenyl, with at least one R 10a C2-C, whether substituted or not 60 Alkyne group, with at least one R 10a C1-C, whether substituted or not 60 Alkyl group, with at least one R 10a C1-C, whether substituted or not 60 Alkyl thio group, with at least one R 10a C3-C, whether substituted or not 60 Carbocyclic group, with at least one R 10a C1-C, whether substituted or not 60 Heterocyclic groups, with at least one R 10a Replaced or unreplaced C6-C 60 aryloxy group, with at least one R 10a Replaced or unreplaced C6-C 60 Arylthio, -C(Q1)(Q2)(Q3), -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1), or -P(=O)(Q1)(Q2), a1 is an integer from 0 to 20. The R 10a It can be deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, or nitro; Deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C7-C 60 Arylalkyl, C2-C 60 heteroarylalkyl, -Si(Q) 11 (Q) 12 (Q) 13 -N(Q) 11 (Q) 12 -B(Q) 11 (Q) 12 -C(=O)(Q) 11 -S(=O)2(Q) 11 -P(=O)(Q) 11 (Q) 12 ) or any combination thereof replacing or not replacing C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl or C1-C 60 Alkoxy; The following groups are used: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 Alkoxy, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C7-C 60 Arylalkyl, C2-C 60 heteroarylalkyl, -Si(Q) 21 (Q) 22 (Q) 23 -N(Q) 21 (Q) 22 -B(Q) 21 (Q) 22 -C(=O)(Q) 21 -S(=O)2(Q) 21 -P(=O)(Q) 21 (Q) 22 C3-C, or any combination thereof, may or may not be substituted. 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C7-C 60 Arylalkyl or C2-C 60 heteroarylalkyl; or -Si(Q 31 )(Q 32 )(Q 33 ), -N(Q 31 )(Q 32 ), -B(Q 31 )(Q 32 ), -C(=O)(Q 31 ), -S(=O)₂(Q 31 ), or -P(=O)(Q 31 )(Q 32 ), Wherein, Q1 to Q3, Q 11 To the Q 13 The Q 21 To the Q 23 and the Q 31 To the Q 33 Independently, they are hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl; cyano; nitro; C1-C 60 Alkyl; C2-C 60 Alkenyl; C2-C 60 Alkyne group; C1-C 60 alkoxy groups; or those represented by deuterium, -F, cyano, C1-C. 60 Alkyl, C1-C 60 Alkoxy, phenyl, biphenyl, or any combination thereof substituted or unsubstituted C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic group; C7-C 60 arylalkyl; or C2-C 60 Heteroarylalkyl.

4. The composition of claim 3, wherein, In the chemical formula 1, R1 is hydrogen, deuterium, or a substance containing at least one R. 10a C1-C, whether substituted or not 60 Alkyl or with at least one R 10a C1-C, whether substituted or not 60 Alkoxy R2 and R3 are independently hydrogen, deuterium, or are separated by at least one R 10a C1-C, whether substituted or not 60 alkyl.

5. The composition of claim 1, wherein, The sulfone solvents include tetramethylene sulfone, diphenyl sulfone, ethyl isopropyl sulfone, or any combination thereof.

6. The composition of claim 1, wherein, The sulfone solvent has a boiling point above 200°C.

7. The composition of claim 1, wherein, The solvents include the amide solvents and the sulfone solvents in a weight ratio of 1:99 to 99:

1.

8. The composition of claim 1, wherein, The composition further includes a polymer product in which the polymeric component is polymerized.

9. The composition of claim 1, wherein, The polymeric component is comprised of 5 to 30 parts by weight relative to 100 parts by weight of the composition.

10. The composition of claim 1, wherein, The first component comprises two or more different diamine compounds.

11. The composition of claim 1, wherein, The diamine compound includes 4,4'-diaminodiphenyl ether, p-phenylenediamine, or any combination thereof.

12. The composition of claim 1, wherein, The tetracarboxylic dianhydride includes biphenyl-tetracarboxylic dianhydride, benzophenone-tetracarboxylic dianhydride, meso-butane-tetracarboxylic dianhydride, or any combination thereof.

13. The composition of claim 1, wherein, The viscosity of the composition is 1,000 to 20,000 cP.

14. A polyimide film formed from the composition according to claim 1.

15. The polyimide film of claim 14, wherein, The transmittance at a wavelength of 450 nm is over 50%.

16. An electronic device comprising the polyimide film of claim 14.

17. An electronic device comprising the polyimide film of claim 14.

18. The electronic device of claim 17, wherein, The electronic device is one of the following: flat panel display, curved display, computer monitor, medical display, television, billboard, indoor or outdoor lighting and / or signal lights, head-up display, fully transparent or partially transparent display, flexible display, rollable display, foldable display, stretchable display, laser printer, telephone, portable telephone, tablet computer, tablet phone, personal digital assistant, wearable device, laptop computer, digital camera, camcorder, viewfinder, microdisplay, 3D display, virtual reality or augmented reality display, vehicle, video wall including multiple displays spliced ​​together, theater or stadium screen, phototherapy equipment, and signage.

19. A method for preparing a polyimide film, comprising the following steps: The composition is coated onto a carrier substrate; and A polyimide film is formed by imidization of the composition by heating. in, The composition is the composition according to any one of claims 1 to 13.

20. The method for preparing the polyimide film according to claim 19, wherein, The step of heating the composition is carried out at a temperature of 50°C to 500°C.

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