WO2014168402A1 - 적층체 및 이를 이용하여 제조된 기판을 포함하는 소자 - Google Patents
적층체 및 이를 이용하여 제조된 기판을 포함하는 소자 Download PDFInfo
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- WO2014168402A1 WO2014168402A1 PCT/KR2014/003044 KR2014003044W WO2014168402A1 WO 2014168402 A1 WO2014168402 A1 WO 2014168402A1 KR 2014003044 W KR2014003044 W KR 2014003044W WO 2014168402 A1 WO2014168402 A1 WO 2014168402A1
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- WO
- WIPO (PCT)
- Prior art keywords
- resin layer
- polyimide resin
- polyimide
- laminate
- temperature
- Prior art date
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/206—Organic displays, e.g. OLED
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/14—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a face layer formed of separate pieces of material which are juxtaposed side-by-side
- B32B3/16—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a face layer formed of separate pieces of material which are juxtaposed side-by-side secured to a flexible backing
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/355—Temporary coating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2221/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
- H01L2221/67—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
- H01L2221/683—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L2221/68304—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
- H01L2221/68318—Auxiliary support including means facilitating the separation of a device or wafer from the auxiliary support
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/311—Flexible OLED
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Y10S156/918—Delaminating processes adapted for specified product, e.g. delaminating medical specimen slide
- Y10S156/93—Semiconductive product delaminating, e.g. delaminating emiconductive wafer from underlayer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Definitions
- the present invention provides a laminate that makes it easier to manufacture a device including a flexible substrate such as a flexible display device by separating the flexible substrate from the carrier substrate even without performing a laser irradiation or a light irradiation process.
- the present invention relates to a device including a manufactured substrate.
- FPDs flat panel displays
- LCDs liquid crystal displays
- OLEDs organic light emitting displays
- electrophoretic devices electrophoretic devices
- the flexible display device is mainly considered to be applied to a mobile device such as a smart phone, and its application field is gradually being considered to be expanded.
- FIG. 1 briefly illustrates a manufacturing process of a device (eg, a flexible display device) having a flexible substrate according to the related art.
- a sacrificial layer 2 made of a-silicon or the like is formed thereon.
- an element structure such as a thin film transistor was formed on the flexible substrate 3 supported by the carrier substrate 1 through an existing element manufacturing process for glass substrates.
- the sacrificial layer 2 is destroyed by irradiating a carrier substrate 1 or the like with a laser or light to separate the flexible substrate 3 on which the element structure is formed, and finally, a flexible substrate such as a flexible display element ( A device having 3) was manufactured.
- the manufacturing method according to the related art not only the device structure may be affected by the process of irradiating the laser or the light, so that the defect may occur, and the equipment for the laser or the light irradiation and the separate process may be performed. As a result, the overall device manufacturing process is complicated and the manufacturing cost is also greatly increased.
- Patent Document 1 International Patent Publication WO2000-066507 (published Nov. 9, 2000)
- An object of the present invention is to easily separate the flexible substrate from the carrier substrate even if the laser irradiation or light irradiation process, such as a flexible display device and a laminate that can more easily manufacture a device including a flexible substrate such as a flexible display device To provide a way.
- Another object of the present invention is to provide a device substrate and a method for manufacturing the same manufactured using the laminate.
- Still another object of the present invention is to provide a device including a substrate manufactured using the laminate.
- the carrier substrate Laminated according to an aspect of the invention, the carrier substrate; A first polyimide resin layer located on one or both surfaces of the carrier substrate, and a second polyimide resin layer located on the first polyimide resin layer, wherein the first polyimide resin layer
- the coefficient of thermal expansion (CTE) in the temperature range of 100 to 200 ° C is equal to or lower than the coefficient of thermal expansion (CTE) in the same temperature section of the second polyimide resin layer, the chemical change of the first polyimide resin layer
- the adhesion of the first polyimide-based resin layer to the second polyimide-based resin layer may be reduced by physical stimulation that does not cause.
- the thermal expansion coefficient (CTE) of the first polyimide resin layer and the second polyimide resin layer in a temperature range of 100 to 200 ° C. may be 60 ppm / ° C. or less.
- the physical stimulus may be to expose the laminated cross section of the laminate.
- the first polyimide-based resin layer exhibits an adhesive force of 1 N / cm or more to the second polyimide-based resin layer before physical stimulation is applied, and the second polyimide-based resin layer after the physical stimulus is applied.
- the polyimide resin layer may exhibit peel strength of 0.3 N / cm or less.
- the first polyimide resin layer may include a first polyimide resin having a similarity value of 0.5 or less calculated by Equation 1 below:
- Coeff i and Coeff j are molecular asphericity calculated from the structures of dianhydride i and diamine j, which are monomers of polyimide, respectively,
- V i and V j are McGrown Volumes calculated from the structures of the monomer dianhydride i and diamine j, respectively,
- the molecular aspheric coefficient and McGrown volume are calculated using the Adriana.Code program (Molecular Networks GmbH),
- ⁇ FIT is Is 1.0, Is constant between 0.1 and 0.95.
- the first polyimide-based resin is applied at 1350 to 1400 cm -1 or 1550 to 1650 cm -1 of the IR spectrum after applying the composition containing the polyamic acid-based resin and performing the imidization at a temperature of 500 °C or more
- the imidation ratio may be 60% to 99%.
- the first polyimide resin may have a glass transition temperature of 200 ° C. or higher and a decomposition temperature of 400 ° C. or higher.
- the composition containing polyimide-type resin or its precursor on a carrier substrate it is equivalent to the hardening temperature of the said 2nd polyimide-type resin layer. It may be prepared by curing at a temperature or a low temperature range of 0 to 200 °C.
- the first polyimide-based resin layer is prepared by curing the polyamic acid prepared by reacting the aromatic tetracarboxylic dianhydride of the general formula (1) with an aromatic diamine compound having a linear structure at a temperature of 200 °C or more
- the first polyimide resin may comprise:
- A is an aromatic tetravalent organic group of Formula 2a or 2b,
- R 11 to R 14 are each independently an alkyl group having 1 to 4 carbon atoms or a haloalkyl group having 1 to 4 carbon atoms, and
- a is an integer of 0-3
- b is an integer of 0-2
- c and e are each independently an integer of 0-3
- d is an integer of 0-4, and f is an integer of 0-3.
- aromatic diamine compound may be an aromatic diamine compound of Formula 4a or 4b.
- R 21 to R 23 are each independently an alkyl group having 1 to 10 carbon atoms or a haloalkyl group having 1 to 10 carbon atoms,
- R 24 and R 25 are each independently selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 10 carbon atoms and a haloalkyl group having 1 to 10 carbon atoms
- q is an integer of 1 or 2
- l, m and n are each independently an integer from 0 to 4, and
- p is an integer of 0 or 1.
- the first polyimide resin layer may have a coefficient of thermal expansion (CTE) of 30 ppm / ° C or less and a 1% pyrolysis temperature (Td1%) of 450 ° C or more under conditions of 100 to 200 ° C. have.
- CTE coefficient of thermal expansion
- Td1% 1% pyrolysis temperature
- the first polyimide-based resin layer may have a thickness of 0.05 to 5 ⁇ m.
- the second polyimide resin layer may include a second polyimide resin having an imidation ratio of 50 to 99% and a glass transition temperature of 200 ° C. or more.
- a method of manufacturing a laminate including forming a first polyimide resin layer including a first polyimide resin on one or both surfaces of a carrier substrate; And applying a composition including a second polyimide resin or a precursor thereof on the first polyimide resin layer and curing the same to form a second polyimide resin layer, wherein the first polyimide
- the coefficient of thermal expansion (CTE) in the temperature range of 100 to 200 ° C. of the resin layer may be equal to or lower than the coefficient of thermal expansion (CTE) in the same temperature range of the second polyimide resin layer.
- the first polyimide-based resin layer may be formed by applying a composition including the first polyimide-based resin or a precursor thereof to one or both surfaces of a carrier substrate and curing the same to form a first polyimide-based resin layer.
- the curing process when the first polyimide-based resin layer is formed is carried out at a temperature of 200 ° C or more, and the curing process when the second polyimide-based resin layer is formed is the first polyimide-based.
- the formation of the resin layer may be carried out at a temperature equivalent to the curing temperature or a high temperature range of 0 to 200 °C.
- the manufacturing method of the laminate may further include a step of heat treatment for 1 to 30 minutes at a temperature of 300 °C or more after the first or second polyimide-based resin layer forming step.
- a method of manufacturing a device substrate includes: forming a first polyimide resin layer including a first polyimide resin on one or both surfaces of a carrier substrate; Preparing a laminate in which a second polyimide resin layer is formed by applying a composition including a second polyimide resin or a precursor thereof onto the first polyimide resin layer and curing the same; And applying a physical stimulus to the laminate that does not cause chemical change of the first polyimide resin layer. And separating the second polyimide resin layer from the carrier substrate on which the first polyimide resin layer is formed, and the coefficient of thermal expansion (CTE) at a temperature range of 100 to 200 ° C. of the first polyimide resin layer. ) May be equal to or lower than the coefficient of thermal expansion (CTE) in the same temperature section of the second polyimide resin layer.
- CTE coefficient of thermal expansion
- the physical stimulus applied to the laminate exposes the laminated cross section of the laminate.
- a device substrate according to another aspect of the present invention is manufactured by the above manufacturing method.
- a device comprising: forming a first polyimide resin layer including a first polyimide resin on one or both surfaces of a carrier substrate; Preparing a laminate in which a second polyimide resin layer is formed by applying a composition including a second polyimide resin or a precursor thereof onto the first polyimide resin layer and curing the same; Forming a device structure on the flexible substrate of the laminate; And after applying a physical stimulus that does not cause chemical change of the first polyimide resin layer to the laminate in which the device structure is formed, debonding the second polyimide resin layer in which the device structure is formed to the debonding layer of the laminate.
- CTE thermal expansion coefficient
- the device may be selected from the group consisting of solar cells, organic light emitting diode lighting, semiconductor devices, and display devices.
- the display device may be a flexible organic light emitting display device.
- the laminate according to the present invention includes a polyimide-based resin layer which can easily separate a flexible substrate from a carrier substrate by applying a relatively small physical stimulus by a cutting method or the like even without performing a laser irradiation or a light irradiation process.
- a device including a flexible substrate such as a flexible display device can be manufactured more easily.
- the present invention since a separate laser or light irradiation is not required, it can greatly contribute to the process simplification and manufacturing cost reduction, and also it is possible to suppress the deterioration of reliability or defect occurrence of the device by laser or light irradiation. It allows the fabrication of devices with properties.
- FIG. 1 is a process schematic diagram briefly showing a manufacturing process of a device including a conventional flexible substrate
- FIG. 2 is a cross-sectional structural view schematically showing the structure of a laminate according to an embodiment of the present invention
- 3A and 3B are process schematic diagrams briefly showing a manufacturing process of manufacturing a substrate for a device and a display device using a laminate according to another embodiment of the present invention, respectively.
- FIG. 6 is a graph illustrating a result of observing a change in peel strength of a debonding layer according to the number of subsequent heat treatment steps after curing of the debonding layer in Test Example 5.
- the term "physical stimulus” in the present specification includes a mechanical stimulus that does not cause chemical change, such as peeling, cutting, friction, tension or compression, unless otherwise specified, and lamination regardless of means or method It means that the laminated cross section of the sieve can be exposed. In some cases, a stimulus having an intensity of 0 to 0.1 N or less per unit area may be applied. In other words, the application of the physical stimulus means that the laminated cross section of the laminate is exposed regardless of the means. Preferably at least two laminated cross-sections forming the ends of the flexible substrate are exposed at predetermined intervals.
- the physical stimulus is to expose the laminated cross section of the laminate, it may have a strength of 0.1N or less.
- the physical stimulus applying method for exposing the laminated cross section of the laminate may be specifically, for example, by cutting, laser cutting or diamond scribing, but is not limited thereto.
- the present invention is a carrier substrate; A first polyimide resin layer positioned on one side or both sides of the carrier substrate; And a second polyimide resin layer positioned on the first polyimide resin layer, wherein the coefficient of thermal expansion (CTE) in the temperature range of 100 to 200 ° C. of the first polyimide resin layer is the second polyimide resin layer.
- the second polyimide-based number before and after applying a physical stimulus that is equal to or lower than the coefficient of thermal expansion (CTE) in the same temperature section of the polyimide-based resin layer and does not cause chemical change of the first polyimide-based resin layer About strata
- the laminated body from which the adhesive force of the said 1st polyimide resin layer differs is provided.
- 'adhesive force' means the adhesive force of the first polyimide resin layer to the second polyimide resin layer before the application of the physical stimulus
- 'peel strength' means the second polyimide after the application of the physical stimulus
- the present invention also comprises the step of applying a composition comprising a first polyimide-based resin or a precursor thereof on one or both sides of the carrier substrate and cured to form a first polyimide-based resin layer; And applying a composition including a second polyimide resin or a precursor thereof onto the first polyimide resin layer and curing the same to form a second polyimide resin layer. to provide.
- the present invention also comprises the step of applying a composition comprising a first polyimide-based resin or a precursor thereof on one or both sides of the carrier substrate and cured to form a first polyimide-based resin layer; Preparing a laminate by applying a composition including a second polyimide resin or a precursor thereof on the first polyimide resin layer and curing the same to form a second polyimide resin layer; And applying a physical stimulus not causing a chemical change of the first polyimide resin layer to the laminate to separate the second polyimide resin layer from the carrier substrate on which the first polyimide resin layer is formed.
- a method of manufacturing a device substrate are provided.
- the present invention also provides a substrate for an element produced by the above manufacturing method.
- the present invention also provides a device comprising a substrate produced by the above-described manufacturing method.
- the carrier substrate A first polyimide resin layer positioned on one or both surfaces of the carrier substrate, and a second polyimide resin layer positioned on the first polyimide resin layer, wherein the first polyimide resin layer
- the coefficient of thermal expansion (CTE) in the temperature range of 100 to 200 ° C. is equal to or lower than the coefficient of thermal expansion (CTE) in the same temperature range of the second polyimide resin layer, and the second polyimide resin layer is formed by physical stimulation.
- Laminates are provided in which adhesion to the substrate is reduced.
- the first polyimide-based resin layer containing a polyimide-based resin having a predetermined characteristic may be combined with a carrier substrate.
- the second polyimide-based resin layer is easily separated from the first polyimide-based resin layer without physically stimulating the laser or light irradiation process, thereby making the device very easy. It was confirmed that it can be manufactured. This action and effect can be expected to be expressed due to the characteristics of the first polyimide resin layer as follows.
- FIG. 2 is a cross-sectional structural view schematically showing the structure of a laminate according to an embodiment of the present invention. 2 is only an example for describing the present invention, but the present invention is not limited thereto.
- the laminate 100 according to the present invention includes a carrier substrate 10; First polyimide resin layers 20 disposed on one or both surfaces of the carrier substrate and including a first polyimide resin; And a second polyimide resin layer 30 positioned on the first polyimide resin layer and including a second polyimide resin.
- the carrier substrate 10 may be used without particular limitation as long as it is used to support the second polyimide-based resin layer 30 so that a device manufacturing process and the like may be easily performed on the laminate 100.
- metal substrates such as a glass substrate and a stainless steel substrate, or these two or more multilayered structures, etc. are mentioned.
- a glass substrate to which an element manufacturing process for a glass substrate and the like can be most easily applied may be preferable.
- the carrier substrate 10 may be pretreated by an etching treatment such as corona treatment, flamming treatment, sputtering treatment, ultraviolet irradiation, electron beam irradiation, etc. in an ozone atmosphere to increase adhesion with the first polyimide resin layer. .
- an etching treatment such as corona treatment, flamming treatment, sputtering treatment, ultraviolet irradiation, electron beam irradiation, etc. in an ozone atmosphere to increase adhesion with the first polyimide resin layer.
- the thickness and size of the carrier substrate 10 may be appropriately selected according to the type of device to be applied, but considering the transparency of the substrate, the carrier substrate 10 preferably has a thickness of 0.1 to 50mm. can do.
- the thickness range as described above has excellent mechanical strength it can exhibit excellent support characteristics for the second polyimide resin layer 30.
- the first polyimide resin layer 20 is located on one or both surfaces of the carrier substrate 10.
- the first polyimide resin layer 20 may properly fix and support the second polyimide resin layer 30 during the device manufacturing process of forming an element structure on the second polyimide resin layer 30.
- the adhesive strength is higher than a certain level, after the device manufacturing process is completed, the adhesive force to the second polyimide resin layer 30 is easily reduced by a simple physical stimulus such as cutting without laser or light irradiation. Can be separated.
- the first polyimide resin layer 20 is about 1 N / cm or more, or about 2 N / cm or more, or about the second polyimide resin layer 30 before the physical stimulus is applied.
- Adhesive strength of 3 to 5 N / cm, but when a physical stimulus is applied, about 0.3 N / cm or less, for example, about 0.2 N / cm or less, or about 0.1 N / cm or less, or about 0.001 to 0.05 N / It may exhibit a peel strength of cm.
- the peel strength of the first polyimide-based resin layer 20 may be measured under the conditions of Table 1 below:
- the peel strength is to prepare a laminate sample in which a first polyimide resin layer and a second polyimide resin layer are sequentially formed on a glass substrate, and the laminate sample is a rectangular shape having a width of 10 mm as a physical stimulus.
- the force applied when the end portion of the cut second polyimide-based resin layer is removed and separated from the first polyimide-based resin layer can be calculated by measuring under the above-described measuring device and conditions.
- the adhesive force has a rectangular size of 100mm in width, to prepare a laminate sample in which the first polyimide resin layer and the second polyimide resin layer are sequentially formed on a glass substrate, and the second polyimide in such a sample
- the end portion of the system resin layer may be calculated by measuring a force applied when the end of the tape is attached to the tape having a width of 10 mm, and the end of the tape is removed from the first polyimide resin layer. It can be the same as the measuring device and conditions of the peel strength shown in Table 1.
- the adhesive force and the peel strength of the first polyimide-based resin layer are controlled by adjusting the kind and content of the polyimide-based resin-forming monomer contained in the first polyimide-based resin layer, the imidation ratio, the coefficient of thermal expansion (CTE), and the like. Can be achieved.
- the first polyimide-based resin layer is formed by applying a composition containing a polyamic acid-based resin as a polyimide resin or a precursor thereof and then curing the composition.
- a composition containing a polyamic acid-based resin as a polyimide resin or a precursor thereof 100 of the first polyimide-based resin layer
- the thermal expansion coefficient (CTE) in the temperature range of 200 ° C. is equal to or lower than the thermal expansion coefficient (CTE) in the same temperature range of the second polyimide resin layer.
- the thermal expansion coefficient (CTE) of the first polyimide resin layer and the second polyimide resin layer in a temperature range of 100 to 200 ° C. is 60 ppm / ° C. or less, or 50 ppm / ° C. or less, or 40 ppm / ° C. or less. It may be 30 ppm / ° C. or less, or 25 ppm / ° C. or less.
- the coefficient of thermal expansion (CTE) in the temperature range of 100 to 200 ° C may mean the average coefficient of thermal expansion in the temperature range.
- the peeling strength is reduced so that the first polyimide resin layer can be easily peeled from the second polyimide resin layer only by physical stimulation as described above.
- a composition containing a polyamic acid-based resin which is a precursor of the first polyimide-based resin, is applied onto the carrier substrate, and is about 200 ° C. or higher, or 250 ° C. to 500 ° C.
- the first polyimide system having an imidation ratio of about 60% to 99%, or about 70% to 98%, or about 75 to 96% Including the resin, the first polyimide resin layer having a peel strength of about 0.3 N / cm or less can be formed.
- the imidation ratio of the polyimide-based resin is about 1350-1400 cm - of the IR spectrum after applying a composition containing a precursor of polyimide, for example, a polyamic acid-based resin, and performing imidization at a temperature of about 500 ° C. or higher.
- a composition containing a precursor of polyimide for example, a polyamic acid-based resin
- the integral intensity of the CN band at 1 or about 1550 to 1650 cm ⁇ 1 is 100%, it can be expressed as measured as the relative integral intensity ratio of the CN band after imidization at the imidization temperature of about 200 ° C. or higher. Can be.
- the first polyimide-based resin prepared by controlling the curing temperature as described above has a glass transition temperature of about 200 ° C. or higher, or about 300 ° C. or higher, or about 350 to 500 ° C., 400 ° C. or higher, or It may have a decomposition temperature (Td) of 400 to 600 °C.
- Td decomposition temperature
- the first polyimide resin layer may exhibit excellent heat resistance even at a high temperature of heat added during the device manufacturing process. It is possible to suppress the occurrence of warpage and other deterioration of reliability of the device during the process, and as a result, it is possible to manufacture devices with more improved characteristics and reliability.
- the first polyimide resin layer may be about 30 ppm / ° C. or less, or about 25 ppm / ° C. or less, or about 20 ppm / ° C. or less, or about 1 to about 100 to 200 ° C. It may have a coefficient of thermal expansion (CTE) of 17 ppm / °C and 1% pyrolysis temperature (Td1%) of 450 °C or more, or 470 °C or more.
- CTE coefficient of thermal expansion
- Td1% pyrolysis temperature
- the first polyimide-based resin layer 20 that satisfies the above structural and physical requirements is peeled cleanly with respect to the second polyimide-based resin layer 30, thereby providing transparency and optical properties of the manufactured substrate for the device. Does not affect properties
- the present inventors have found that the adhesive force varies depending on the type of dianhydride and diamine of the polyimide constituting the debonding layer, and suggests a method for quantitatively evaluating the adhesive force.
- a monomer combination based similarity score was developed. The larger the value, the higher the nonlinear / nonplanar structure with high structural similarity to the sphere, and the smaller the value, the smaller the sphere and structure. Low linearity / planar structure.
- the similarity value is preferably 0.5 or less.
- Coeff i and Coeff j are molecular asphericity calculated from the structures of dianhydride i and diamine j, which are monomers of polyimide, respectively,
- V i and V j are McGrown Volumes calculated from the structures of the monomer dianhydride i and diamine j, respectively,
- the molecular aspheric coefficient and McGrown volume are calculated using the Adriana.Code program (Molecular Networks GmbH),
- ⁇ FIT is Back side Is 1.0, Is constant between 0.1 and 0.95.
- the constant ⁇ FIT is Back side It may be any constant ranging from 0.1 to 0.95 but preferably 0.2 to 0.5, most preferably 0.33.
- ADRIANA.Code program was developed by Molecular Networks GmbH, Germany, and is mainly used to calculate the unique physical, chemical, and electrical properties of a molecule. Aspheric coefficient and McGrown volume can be calculated.
- the polyamic acid-based resin as the above-described first polyimide-based resin or a precursor thereof may be formed by polymerization and imidization using any tetracarboxylic dianhydride compound and a diamine compound as monomers.
- tetracarboxylic dianhydride compound examples include pyromellitic dianhydride (PMDA), 3,3 ', 4,4'-biphenyltetracarboxylic dianhydride (3, 3'4,4'-Biphenyl tetracarboxylic acid dianhydride (BPDA), meso-butane-1,2,3,4-tetracarboxylic dianhydride (meso-buthane-1,2,3,4-tetracarboxylic dianhydride), 3,3 ', 4,4'-benzophenonetetracarboxylic dianhydride (3,3', 4,4'-benzophenone tetracarboxylic dianhydride, BTDA), 2,3,3 ', 4'-diphenylethertetra Carboxylic dianhydrides (2,3,3 ', 4'-diphenylether tetracarboxylic dianhydride, ODPA), 3,
- each said monomer as a specific example of a diamine compound, p-phenylenediamine (PDA), m-phenylenediamine (m-PDA), 2,4,6-trimethyl-1,3-phenyl Lendiamine, 2,3,5,6-tetramethyl-1,4-phenylenediamine, 4,4'-diaminodiphenylether, 3,4'-diaminodiphenylether, 3,3 ' -Diaminodiphenyl ether, 4,4'-diaminodiphenylsulfide, 4,4'-diaminodiphenylmethane, 3,4'-diaminodiphenylmethane, 3,3'-diaminodiphenyl Methane, 4,4'-methylene-bis (2-methylaniline), 4,4'-methylene-bis (2,6-dimethylaniline), 4,4'-methylene-bis (2,6-diethylaniline ), 4,4'-m
- the kind of the tetracarboxylic dianhydride compound and the diamine compound is not particularly limited, it is possible to more suitably satisfy the physical properties required for the first polyimide resin layer such as the low CTE range or peel strength described above. For this, it is important that the acid dianhydride does not have a linker structure between the aromatic rings.
- an aromatic tetracarboxylic dianhydride represented by Formula 1 may be preferable:
- A is an aromatic tetravalent organic group derived from an acid dianhydride, specifically, may be an aromatic tetravalent organic group of Formula 2a or 2b:
- R 11 to R 14 are each independently an alkyl group having 1 to 4 carbon atoms (eg, methyl group, ethyl group, propyl group, etc.) or a haloalkyl group having 1 to 4 carbon atoms (eg, fluoromethyl group, bromomethyl group, chloro Methyl group, trifluoromethyl group, etc.), and
- a may be an integer of 0 to 3
- b is an integer of 0 to 2
- c and e are each independently an integer of 0 to 3
- d is an integer of 0 to 4
- f may be an integer of 0 to 3
- c, d and e are integers of zero.
- the tetracarboxylic dianhydride is pyromellitic dianhydride (PMDA) of Chemical Formula 3a, or has a linear structure as in Chemical Formula 3b, and two aromatic rings are directly connected without a linker structure. It may be more preferred that it is 3,3 ', 4,4'-biphenyltetracarboxylic dianhydride (BPDA):
- PMDA pyromellitic dianhydride
- BPDA 4,4'-biphenyltetracarboxylic dianhydride
- the packing density of the first polyimide-based resin layer 20 the less the intermolecular space and the lower the binding force due to mutual penetration.
- the adhesive strength to the second polyimide resin layer 30 formed on the first polyimide resin layer 20 and the peeling strength of the second polyimide resin layer from the laminate become low.
- the packing density can be represented by CTE. The higher the packing density, the lower the CTE value, and the lower the CTE, the higher the packing density.
- an aromatic diamine compound having a linear structure specifically, an aromatic diamond of the following formula 4a or 4b
- an aromatic diamond of the following formula 4a or 4b Preference is given to using minor compounds:
- R 21 to R 23 are each independently an alkyl group having 1 to 10 carbon atoms (eg, methyl group, ethyl group, propyl group, etc.) or a haloalkyl group having 1 to 10 carbon atoms (eg, fluoromethyl group, bromomethyl group, Chloromethyl group, trifluoromethyl group, etc.),
- l, m and n are each independently an integer of 0 to 4, preferably an integer of 0, and
- p is an integer of 0 or 1, Preferably it is an integer of 0.
- Examples of such a preferred aromatic diamine-based compound include p-phenylenediamine (PDA), benzidine (BZD), m-tolidine, 2,2'-bis (trifluoromethyl) -benzidine (2,2'- bis (trifluoromethyl) benzidine, TFMB) and the like.
- PDA p-phenylenediamine
- BZD benzidine
- m-tolidine 2,2'-bis (trifluoromethyl) -benzidine (2,2'- bis (trifluoromethyl) benzidine, TFMB) and the like.
- Each of these monomers is polymerized in a polar organic solvent to prepare a first polyamic acid resin, and the above-mentioned agent is imidated by imidizing the polyamic acid resin under the above curing temperature conditions in the presence or absence of an imidization catalyst such as an amine catalyst.
- an imidization catalyst such as an amine catalyst.
- 1 polyimide-based resin and a first polyimide-based resin layer comprising the same can be formed.
- other conditions for the preparation of the first polyamic acid-based resin or the first polyimide-based resin in addition to the above-described curing temperature conditions may be in accordance with conventional conditions and methods well known to those skilled in the art, and thus, further description thereof will be omitted. do.
- the first polyimide resin layer 20 as described above may have a thickness of 0.05 to 5 ⁇ m, 0.05 to 4 ⁇ m, or 0.05 to 3 ⁇ m, or 0.05 to 2 ⁇ m, or 0.05 to 1 ⁇ m.
- a thickness of the first polyimide resin layer becomes thinner, the adhesive force with the carrier substrate increases, but when too thin, the peelability is reduced due to the increase of the adhesive force with the second polyimide resin layer. Therefore, in order to show high adhesive force with a carrier substrate and high peelability with a 2nd polyimide-type resin layer, it is preferable to have said thickness range.
- the 2nd polyimide-type resin layer 30 is located on the said 1st polyimide-type resin layer 20 on the said 1st polyimide-type resin layer 20.
- the second polyimide-based resin layer 30 includes a second polyimide-based resin prepared by curing at a temperature equivalent to the curing temperature of the first polyimide-based resin layer or at a high temperature of 0 to 200 ° C.
- the second polyimide resin may have an imidation ratio of about 50 to 99%, or about 70 to 95%.
- the second polyimide resin has a glass transition temperature (Tg) of about 200 ° C. or higher, or about 300 ° C. or higher, or about 350 to 500 ° C., and a decomposition temperature of 400 ° C. or higher, or 400 to 600 ° C. Td). Because of this excellent heat resistance, there is no fear of deformation even in the heating step for producing the laminate or the device substrate, and the heat resistance of the substrate and the device can be improved.
- Tg glass transition temperature
- the second polyimide resin layer 30 may have a thermal expansion coefficient of about 60 ppm / ° C. or less, or 50 ppm / ° C. or less, 40 ppm / ° C. or less, or about 1 to 30 ppm / ° C. under conditions of 100 to 200 ° C. CTE) and 1% pyrolysis temperature (Td1%) of 450 ° C or higher, or 470 ° C or higher.
- Td1% pyrolysis temperature
- the coefficient of thermal expansion (CTE) in the temperature range of 100 to 200 ° C. of the second polyimide resin layer is preferably equal to or higher than the coefficient of thermal expansion (CTE) in the same temperature range of the first polyimide resin layer.
- the thermal expansion coefficient (CTE) of the first polyimide resin layer and the second polyimide resin layer in a temperature range of 100 to 200 ° C. is 60 ppm / ° C. or less, or 50 ppm / ° C. or less, or 40 ppm / ° C. or less. It may be 30 ppm / ° C. or less, or 25 ppm / ° C. or less.
- the coefficient of thermal expansion (CTE) in the temperature range of 100 to 200 ° C may mean the average coefficient of thermal expansion in the temperature range.
- the peel strength is lowered to the extent that the first polyimide resin layer can be easily peeled from the second polyimide resin layer only by physical stimulation as described above.
- the second polyimide resin having physical properties as described above may be prepared by appropriately controlling the type and content ratio of the monomers used in the preparation together with the curing conditions, or the process and reaction conditions for the preparation thereof.
- the second polyimide resin tetracarboxylic dianhydride and a diamine compound are used as a monomer to cure a polyamic acid resin prepared by polymerization or to use a solution composition comprising a polyimide resin. If dry.
- the tetracarboxylic dianhydride and diamine which can be used at this time are the same as what was demonstrated by the manufacturing method of 1st polyimide-type resin.
- the second polyimide resin that satisfies the above physical properties may be controlled by controlling the reaction ratio of tetracarboxylic dianhydride and diamine used in the polymerization of tetracarboxylic dianhydride and diamine. . Specifically, it may be preferable to use diamine in a molar ratio of 0.8 to 1.2, or 0.9 to 1.1 with respect to 1 mol of the tetracarboxylic dianhydride.
- the second polyimide resin layer 30 having the above-described physical properties is 0.5 to 50 ⁇ m, or 1 to 50 ⁇ m, or 2 to 50 ⁇ m, or 3 to 50 ⁇ m, or 3 to 30 ⁇ m. It may have a thickness.
- the second polyimide resin layer 30 may preferably have an appropriate thickness compared to the first polyimide resin layer, for example, 10 to 500 times, or 20 to 400 times, the thickness of the debonding layer, or It may be 30 to 300 times, or 50 to 200 times.
- the laminate 100 having the above structure is cured by applying a composition containing a first polyimide resin or a precursor thereof to one or both surfaces of the carrier substrate 10, and then curing the first polyimide resin layer ( 20) forming a step (step 1), and a composition comprising a second polyimide-based resin or a precursor thereof on the first polyimide-based resin layer 20, and then cured to form a second polyimide-based water It can be prepared according to the manufacturing method comprising the step (step 2) of forming the ground layer (30).
- Step 1 is a step of forming the first polyimide resin layer 20 on the carrier substrate 10.
- the carrier substrate 10 is the same as described above, and prior to the formation of the first polyimide resin layer 20, corona treatment in an ozone atmosphere for increasing adhesion with the first polyimide resin layer 20. It can be pretreated by etching treatment such as flamming treatment, sputtering treatment, ultraviolet irradiation, electron beam irradiation and the like.
- the first polyimide resin layer 20 is cured after applying a composition containing the first polyamic acid resin as a first polyimide resin or a precursor thereof to one or both surfaces of the carrier substrate 10. It can be formed by. At this time, when the polyamic acid-based resin is used to manufacture the first polyimide-based resin layer 20, the imidization of the polyamic acid-based resin proceeds together during the curing process.
- the coating method may be carried out according to a conventional method, specifically, a spin coating method, a dip coating method, or a bar coating method, and a casting method, a rolling method or a spray coating method suitable for a continuous process may be used. Can be.
- a drying step for removing the organic solvent present in the composition for forming the first polyimide resin layer may be further performed prior to the curing step.
- the drying process may be carried out according to a conventional method, specifically, the drying process may be carried out at a temperature of 140 °C or less.
- the curing process may be carried out at a temperature equivalent to the curing temperature of the second polyimide resin layer 30 or a low temperature range of 0 to 200 °C, specifically 200 °C or more, or 250 °C to 500 °C By heat treatment at temperature.
- the heat treatment process for the curing may be performed by a multi-step heat treatment at various temperatures within the temperature range.
- the curing time during the curing process is not particularly limited, it may be carried out for 3 to 30 minutes as an example.
- a subsequent heat treatment process may be optionally further performed to adjust the peel strength after the curing process.
- the subsequent heat treatment process is preferably carried out for 1 to 30 minutes at a temperature of 300 °C or more.
- the subsequent heat treatment process may be performed once or may be performed in multiple stages two or more times. Specifically, it may be carried out in three steps including a first heat treatment at 200 to 250 ° C., a second heat treatment at 300 to 350 ° C., and a third heat treatment at 400 to 450 ° C.
- Step 2 is a step of forming a laminate by forming a second polyimide resin layer 30 on the first polyimide resin layer 20 prepared in step 1.
- the second polyimide resin layer 30 is cured by applying a composition containing a second polyamic acid resin as the second polyimide resin or a precursor thereof on the first polyimide resin layer 20.
- the second polyimide-based resin or precursor thereof usable may be the same as described above.
- composition for forming a second polyimide resin layer containing the second polyimide resin or the second polyamic acid resin may be a binder, a solvent, a crosslinking agent, an initiator, a dispersant, a plasticizer, a viscosity modifier, or an ultraviolet ray which is commonly used. You may further include additives, such as an absorbent, a photosensitive monomer, or a sensitizer.
- the curing process may be performed by heat treatment at a temperature of 200 ° C. or higher, and preferably, a temperature equivalent to the curing temperature of the first polyimide resin layer. Or by heat treatment in a high temperature range of 0 to 200 ° C. In addition, the heat treatment may be performed by a multi-stage heat treatment performed at various temperatures within the above temperature range.
- the first polyimide-based resin layer itself exhibits an appropriate adhesion force to the second polyimide-based resin layer, etc., so that the second polyimide-based resin layer during the device manufacturing process Can be properly fixed and supported, the substrate of the device including the second polyimide-based resin layer such as a flexible display device can be easily manufactured using the laminate of one embodiment of the present invention.
- various devices having a second polyimide resin layer having excellent characteristics can be manufactured by appropriately proceeding the device manufacturing process on the laminate while omitting laser or light irradiation for separating the second polyimide resin layer. have.
- the manufacturing process of the element which has the said 2nd polyimide resin layer can be greatly simplified, and its manufacturing cost can also be greatly reduced.
- a device substrate and a method for manufacturing the same which are manufactured using the laminate.
- the curing process may be performed at a temperature equivalent to a curing temperature at the time of formation of the second polyimide resin layer or at a low temperature of 0 to 200 ° C.
- 3A is a process diagram schematically illustrating a method of manufacturing a device substrate according to an embodiment of the present invention. 3A is only an example for describing the present invention and the present invention is not limited thereto.
- the device substrate according to the present invention may include forming the first polyimide resin layer 20 on one or both surfaces of the carrier substrate 10 (S1). Forming a second polyimide resin layer 30 on the mid-based resin layer 20 to produce a laminate (S2), and the chemical of the first polyimide resin layer 30 in the laminate Applying a physical stimulus (p) that does not cause a change, and then separating the second polyimide resin layer 30 from the carrier substrate 10 on which the first polyimide resin layer 20 is formed (S3 and S4). It can be prepared by a manufacturing method including).
- the curing process at the time of forming the first polyimide resin layer 20 is performed at a temperature equivalent to the curing temperature at the time of formation of the second polyimide resin layer 30 or at a temperature lower than 0 to 200 ° C.
- Separation of the second polyimide-based resin layer may be a method generally used in the related art, for example, vacuum adsorption, but is not limited thereto, and requires only a weaker force than the conventional method, thereby minimizing damage in manufacturing the display device. You can choose how you can do it.
- the process before the separation step of the second polyimide resin layer 30 may be carried out in the same manner as in the manufacturing method of the laminate.
- Separation of the second polyimide resin layer 30 may be performed by applying an appropriate physical stimulus, such as cutting, laser cutting, or diamond scribing. It can be done by applying a stimulus.
- an appropriate physical stimulus such as cutting, laser cutting, or diamond scribing. It can be done by applying a stimulus.
- the device substrate manufactured by the above method includes the second polyimide resin layer separated from the carrier substrate by applying only a relatively small physical stimulus by a cutting method or the like even without performing a laser irradiation or a light irradiation process. Therefore, deterioration or failure of the device due to laser or light irradiation can also be suppressed, and as a result, the characteristics of the device can be further improved when applied to the device.
- an element including the substrate may be provided.
- the device may be any solar cell having a second polyimide resin layer (eg, a flexible solar cell), an organic light emitting diode (OLED) illumination (eg, a flexible OLED lighting), a second polyimide
- a second polyimide resin layer eg, a flexible solar cell
- OLED organic light emitting diode
- Any semiconductor device having a resin-based resin layer, or a flexible display device such as an organic electroluminescent device, an electrophoretic device, or an LCD device having a second polyimide-based resin layer, of which an organic electroluminescent device may be preferable. have.
- the device sequentially forms the first polyimide resin layer 20 and the second polyimide resin layer 30 on one or both surfaces of the carrier substrate 10 to stack the embodiment.
- the step of forming the device structure 40 on the second polyimide resin layer of the laminate i.e., device manufacturing process step
- the second polyimide resin layer 30 on which the device structure 40 is formed may be manufactured by separating the carrier substrate 10 on which the first polyimide resin layer 20 is formed.
- the second structure may include a semiconductor device structure including a gate electrode, a display device structure including a thin film transistor array, a diode device structure having a P / N junction, an OLED structure including an organic light emitting layer, or a solar cell structure. It can be a conventional device structure according to the type of device to be formed on the mid-based resin layer.
- the transparent electrode is located on the back of the second polyimide-based resin layer in the substrate, including indium tin oxide (ITO); A light emitting part disposed on a rear surface of the transparent electrode and including an organic compound; And located on the back of the light emitting portion, it may include a metal electrode containing a metal, such as aluminum.
- ITO indium tin oxide
- the device according to the present invention is improved and reliable by including a second polyimide resin layer, which is separated from the carrier substrate by applying only a physical stimulus without treatment such as laser or light irradiation, as the substrate of the device. Can exhibit characteristics.
- a composition for forming a first polyimide resin layer containing 3 wt% of a polyamic acid resin prepared by polymerizing 1 mol of BPDA and 0.99 mol of PDA and 97 wt% of DMAc as a solvent was dried. After the coating was applied so that the thickness is 0.1 ⁇ m.
- the resulting polyimide resin layer-forming coating film was continuously subjected to a drying step at a temperature of 120 ° C. and a curing step (30 minutes) at a temperature of 250 ° C. to form a polyimide resin (hereinafter referred to as “first”
- first polyimide resin layer comprising a polyimide resin ').
- a composition for forming a second polyimide resin layer comprising 12 wt% of a polyamic acid resin prepared by polymerizing 1 mol of BPDA and 0.99 mol of TFMB on the first polyimide resin layer and 88 wt% of DMAc as a solvent.
- the film was coated to have a thickness of 15 ⁇ m, and the resulting second polyimide resin layer-forming coating film was continuously subjected to a drying step at a temperature of 100 ° C. and a curing step of 60 minutes at 350 ° C.
- a second polyimide resin layer containing a mid resin hereinafter referred to as a 'second polyimide resin'
- test Laminate 1-1 a laminate in which a carrier substrate, a first polyimide resin layer containing a BPDA-PDA polyimide resin, and a second polyimide resin layer containing a BPDA-TFMB polyimide resin were sequentially laminated.
- the lamination agent was prepared in the same manner as in Example 1.
- BPDA biphenyl-tetracarboxylic acid dianhydride
- PDA is p-phenylene diamine
- TFMB 2,2'-bis (tri Fluoromethyl) -benzidine (2,2'-bis (trifluoromethyl) benzidine)
- mPDA for m-phenylenediamine
- PMDA for pyromellitic dianhydride
- ODA for 4 , 4'-oxydianiline (4,4'-oxydianiline) means.
- Test Example 1 Physical property evaluation of the first polyimide resin layer
- the density, thermal expansion coefficient (CTE), glass transition temperature (Tg), adhesion strength, and peel strength were measured for the first polyimide resin layer.
- the adhesive force was measured while peeling the second polyimide resin layer using a tape without applying physical stimulus (without cutting), and the peel strength was measured in a rectangular shape having a width of 10 mm and a length of 100 mm.
- the force taken when the end of the cut second polyimide-based resin layer was removed at a speed of 50 mm / min was measured using a texture analyzer (TA.XT plus, manufactured by Stable micro systems). The measurement results are shown in Table 4 below.
- test laminates 1-1 to 1-4 containing polyimide prepared using tetracarboxylic dianhydride of Formula 1 and a linear diamine compound Shows a significantly reduced peel strength compared to Test Stack 1-5 comprising polyimide prepared using tetracarboxylic dianhydride in which the intramolecular aromatic ring is connected via a linking group.
- test laminates 1-3 and 1-4 do not contain a linker structure between the aromatic rings, they exhibit high peel strength compared to the test laminates 1-1 and 1-2 due to the trifluoromethyl group. It is because the packing density of a 1st polyimide-type resin layer became low, and the adhesive force of the 1st polyimide-type resin layer and the 2nd polyimide-type resin layer became stronger. However, it can be seen that the peel strength is much lower than that of the test laminate 1-5 using the diamine containing the linker structure between the aromatic rings.
- Laminate 1-1 the same method as in Example 1 except that the curing temperature was varied in various ways as shown in Table 5 below when the first polyimide-based resin layer was formed. It carried out by the above and manufactured the laminated body.
- the peel strength was significantly reduced upon application of the physical stimulus, and the extent of this decrease was sharply increased above a certain curing temperature (250 ° C.).
- Example 6 For the laminate of Example 1 subjected to the curing process at 250 ° C., the adhesion and peel strength were observed after storage at 25 ° C./55% for 7 days immediately after preparation and 7 days after preparation. The results are shown in Table 6 below.
- the peel strength decreased when the physical stimulus was applied, and the adhesion strength increased and the peel strength further decreased with time, but the width of the change was not large.
- Example 7 As shown in Table 7 in the same manner as in Example 1, except that the type of the first and second polyimide-based resin, the curing temperature and the thickness of the first polyimide-based resin layer is variously changed
- the test laminated body was manufactured by carrying out.
- the thickness of the second polyimide resin layer became thinner, the peeling strength increased, and the degree of change in the peeling strength according to the thickness change was applied to the test laminate including the second polyimide resin of transparent BPDA-TFMB.
- the test laminate including the colored BPDA-PDA second polyimide resin was larger than that of the test laminate.
- Example 11 a test laminate was prepared in the same manner as in Example 1 except for changing the type and curing conditions of the first and second polyimide-based resins in various ways.
- BZD means benzidine and mTOL means m-tolidine.
- the peel strength of the test laminate 5-4 was much higher than that of the other test laminates because the packing density of the diamine used to form the first polyimide resin of the debonding layer contained a linker structure between the aromatic rings. It is judged that the peel strength is high because it is low and the intermolecular space is increased to increase the bonding force due to mutual penetration.
- the obtained peel strength test value is compared with the similarity obtained according to Equation 1 of the present invention.
- test laminate was prepared in the same manner as in Example 1 except for the above.
- the physical properties of the polyimide resin that can be used as the first and second polyimide resins were evaluated.
- tetracarboxylic dianhydride and diamine-based compounds were prepared, respectively.
- the composition for formation was applied after drying to have a thickness of 10 to 15 ⁇ m.
- the polyimide resin layer was formed by continuously performing the drying process at the temperature of 120 degreeC, and the hardening process at 350 degreeC temperature with respect to the coating film for 1st polyimide-type resin layer formation produced as a result.
- the imidation ratio is 1350 to 1400 cm ⁇ of the IR spectrum after applying a composition comprising a polyamic acid-based resin prepared by polymerization of each monomer shown in Table 15 and proceeding with imidization at a temperature of 500 ° C. or higher.
- the relative integrated intensity ratio of the CN bands after imidation at a temperature of 200 ° C. or higher was measured for 100% of the integrated intensity of the CN bands represented by 1 or 1550 to 1650 cm ⁇ 1 .
- glass transition temperature was measured at the temperature increase rate of 10 degree-C / min using the differential scanning calorimeter (DSC 2010, TA instrument make).
- the 1% pyrolysis temperature (Td1%) is a temperature when the initial weight of the polyimide film decreases by 1% while the temperature is raised to a temperature increase rate of 10 ° C / min in nitrogen using a thermogravimetric analyzer (TG-DTA2000). Was measured.
- CTE coefficient of thermal expansion
- a test laminate was prepared in the same manner as in Example 1 using PMDA-PDA as the first polyimide resin of the debonding layer and BPDA-PDA as the second polyimide resin of the flexible substrate, except that the curing temperature was increased. Changed. Table 15 shows the results of the adhesion and peel strength.
- An acid dianhydride forming the debonding layer was prepared in the same manner as in Example 1 using BPDA and PMDA together.
- the molar ratio of BPDA and PMDA was varied.
- the second polyimide forming the flexible substrate is cyclohexane tetracarboxylic dianhydride (BPDA_H) as an acid dianhydride, and 4-amino-N- (4-aminophenyl) benzamide (DABA) and 4 as a diamine compound.
- DABA 4-amino-N- (4-aminophenyl) benzamide
- ODA 4'-diaminodiphenylether
- Table 17 shows the results of measuring the adhesion and peel strength.
- the dibonding layer was prepared in the same manner as in Test Example 8, and the polyimide forming the flexible substrate was cyclohexane tetracarboxylic dianhydride (BPDA-H) as an acid dianhydride, and 4-amino-N as a diamine compound.
- BPDA-H cyclohexane tetracarboxylic dianhydride
Abstract
Description
박리강도측정조건 | 필름 폭(mm) | 10 |
길이(mm) | 100 | |
속도(mm/min) | 50 | |
측정 기기 | Texture Analyser(TA.XT plus, Stable micro systems사제) |
경화온도 (℃) | 150 | 200 | 250 | 300 | 350 | 500 |
이미드화율 (%) | 10.36 | 49.21 | 79.34 | 92.78 | 95.69 | 100 |
박리 강도 (N/cm) | 2.8 | 2.8 | 0.03 | 0.016 | 0.03 | 0.35 |
시험 적층체 | 제1 폴리이미드계 수지 | 제2폴리이미드계 수지 |
1-1 | BPDA-PDA | BPDA-TFMB |
1-2 | BPDA-PDA | BPDA-mPDA |
1-3 | BPDA-TFMB | BPDA-TFMB |
1-4 | BPDA-TFMB | BPDA-mPDA |
1-5(비교예) | PMDA-ODA | BPDA-TFMB |
시험 적층체No. | 제1 폴리이미드계 수지(경화온도: 250℃) | 제2폴리이미드계 수지(경화온도: 350℃) | 제1 폴리이미드계 수지의 물성 | 제2 폴리이미드계 수지 | 접착력(N/cm) | 박리강도(N/cm) | ||
밀도(g/cm3) | CTE(ppm/℃) | Tg(℃) | CTE(ppm/℃) | |||||
1-1 | BPDA-PDA | BPDA-TFMB | 1.488 | 3.590 | 374 | 8.205 | 3.64 | 0.022 |
1-2 | BPDA-PDA | BPDA-mPDA | 1.488 | 3.590 | 374 | 29.61 | 3.59 | 0.029 |
1-3 | BPDA-TFMB | BPDA-TFMB | 1.475 | 8.205 | 352 | 8.205 | 3.61 | 0.132 |
1-4 | BPDA-TFMB | BPDA-mPDA | 1.475 | 8.205 | 352 | 29.61 | 3.82 | 0.167 |
1-5(비교예) | PMDA-ODA | BPDA-TFMB | - | 20.3 | 330 | 8.205 | 3.77 | 1.02 |
경과일수 | 1층 경화온도 | 접착력(N/cm) | 박리강도(N/cm) |
0 일(제조직후) | 200℃ | 3.4 | 0.24 |
250℃ | 3.64 | 0.022 | |
300℃ | 3.68 | 0.032 | |
1일(25℃/RH 55%) | 200℃ | 3.76 | 0.24 |
250℃ | 3.63 | 0.024 | |
300℃ | 3.62 | 0.036 |
경과일수 | 접착력(N/cm) | 박리강도(N/cm) |
0일 | 3.64 | 0.022 |
7일 | 3.66 | 0.020 |
시험 적층체No. | 디본딩층 | 가요성 기판 | |||
제1폴리이미드계 수지 | 경화온도 | 제2폴리이미드계 수지 | 경화온도 | 두께(㎛) | |
3-1 | BPDA-PDA | 250℃ | BPDA-TFMB | 350℃ | 19.7 |
3-2 | 5.2 | ||||
3-3 | 2.5 | ||||
3-4 | 1.7 | ||||
3-5 | 0.9 | ||||
3-6 | BPDA-PDA | 450℃ | 19 | ||
3-7 | 5.3 | ||||
3-8 | 2.1 | ||||
3-9 | 1.4 |
시험적층체 No. | 제2폴리이미드계 수지 | 제2폴리이미드계 수지층의 두께(㎛) | 접착력(N/cm) | 박리강도(N/cm) |
3-1 | BPDA-TFMB | 19.7 | 3.88 | 0.04 |
3-2 | 5.2 | 3.86 | 0.056 | |
3-3 | 2.5 | 3.52 | 0.08 | |
3-4 | 1.7 | 3.77 | 0.104 | |
3-5 | 0.9 | 3.64 | 0.136 | |
3-6 | BPDA-PDA | 19 | 3.59 | 0.072 |
3-7 | 5.3 | 3.67 | 0.1 | |
3-8 | 2.1 | 3.71 | 0.348 | |
3-9 | 1.4 | 3.66 | 0.428 |
시험적층체 No. | 디본딩층 | 가요성기판 | 접착력(N/cm) | 박리강도(N/cm) | |||
제1폴리 이미드계 수지 | 경화 온도(℃) | 경화 시간(분) | 제2폴리 이미드계 수지 | 경화 온도(℃) | |||
4-1 | BPDA-PDA | 230 | 3 | BPDA-TFMB | 350 | 3.56 | 0.464 |
4-2 | 5 | 3.61 | 0.084 | ||||
4-3 | 10 | 3.44 | 0.028 | ||||
4-4 | 20 | 3.58 | 0.03 | ||||
4-5 | 30 | 3.72 | 0.026 | ||||
4-6 | 250 | 3 | 3.66 | 0.026 | |||
4-7 | 5 | 3.61 | 0.0296 | ||||
4-8 | 10 | 3.45 | 0.0232 | ||||
4-9 | 20 | 3.58 | 0.0224 | ||||
4-10 | 30 | 3.64 | 0.022 | ||||
비교적층체 | X | X | X | BPDA-TFMB | 350 | 3.42 | 0.524 |
시험적층체 No. | 디본딩층경화조건 250℃, 30분 | 가요성 기판경화조건 350℃, 60분 | ||
제1폴리이미드계 수지 | CTE(ppm/℃) | 제2폴리이미드계 수지 | CTE(ppm/℃) | |
5-1 | BPDA-PDA | 3.590 | BPDA-TFMB | 8.205 |
5-2 | BPDA-BZD | 4.116 | ||
5-3 | BPDA-mTOL | 4.357 | ||
5-4(비교예) | ODPA-TFMB | 28.09 |
시험적층체 No. | 디본딩층의 제1폴리이미드계 수지 | 가요성 기판의 제2폴리이미드계 수지 | 접착력(N/cm) | 박리강도(N/cm) |
5-1 | BPDA-PDA | BPDA-TFMB | 3.64 | 0.022 |
5-2 | BPDA-BZD | 3.66 | 0.0672 | |
5-3 | BPDA-mTOL | 3.48 | 0.068 | |
5-4(비교예) | ODPA-TFMB | 3.52 | 1.23 |
제1 폴리이미드계 수지 | 박리강도 실험값(N/cm) | 평가 | 유사도 (MC-based similarity score) |
BPDA-PDA | 0.022 | A | 0.3206 |
BPDA-BZD | 0.0672 | A | 0.1675 |
BPDA-mTOL | 0.068 | A | 0.1917 |
BPDA-TFMB | 0.132 | A | 0.4291 |
PMDA-PDA | 0.052 | A | 0.2992 |
BPDA-mPDA | 박리불가 | NA | 0.5069 |
PMDA-ODA | 1.02 | NA | 0.6598 |
ODPA-TFMB | 1.23 | NA | 0.5552 |
시험 적층체 No. | 제1폴리이미드계 수지층 | 제2폴리이미드계 수지층 | 경화 후 열처리 공정 실시횟수 | ||
제1폴리이미드계 수지 | 경화조건 | 제2폴리이미드계 수지 | 경화조건 | ||
5-5 | BPDA-PDA | 250℃, 30분 | BPDA-TFMB | 350℃, 60분 | 1회 |
5-6 | " | " | " | " | 3회 |
5-7 | " | " | " | " | 5회 |
시험적층체 No. | 열처리 횟수 | 접착력 (N/cm) | 박리강도(N/cm) |
5-5 | 1회 | 3.75 | 0.0210 |
5-6 | 3회 | 3.63 | 0.0210 |
5-7 | 5회 | 3.81 | 0.0203 |
폴리이미드계 수지 | 이미드화율 | CTE(ppm/℃) | Tg(℃) | Td 1%(℃) |
BPDA-PDA | 95.7 | 3.590 | 374 | 547 |
BPDA-TFMB | 96.2 | 8.205 | 352 | 524 |
시험적층체 No. | 디본딩층의 제1폴리이미드계 수지(PMDA-PDA)경화온도 | 가요성 기판의 제2폴리이미드계 수지(BPDA-PDA)경화온도 | 접착력(N/cm) | 박리강도(N/cm) |
7-1 | 300℃ | 450℃ | 3.61 | 0.09095 |
7-2 | 350℃ | 450℃ | 3.55 | 0.0802 |
7-3 | 400℃ | 450℃ | 3.54 | 0.0883 |
시험적층체 No. | 디본딩층의 제1폴리이미드계 수지(경화온도 300℃) | CTE(ppm/℃) | 가요성 기판의 제2폴리이미드계 수지 (경화온도 350℃) | CTE(ppm/℃) | 접착력(N/cm) | 박리강도(N/cm) |
8-1 | BPDA7-PMDA3-PDA | 3.280 | BPDA_H-DABA-ODA | 52.82 | 3.59 | 0.134 |
8-2 | BPDA5-PMDA5-PDA | 2.771 | 3.64 | 0.097 | ||
8-3 | BPDA3-PMDA7-PDA | 2.335 | 3.66 | 0.064 |
시험적층체 No. | 디본딩층의 제1폴리이미드계 수지(경화온도 300℃) | CTE(ppm/℃) | 가요성 기판의 제2폴리이미드계 수지 (경화온도 350℃) | CTE(ppm/℃) | 접착력(N/cm) | 박리강도(N/cm) |
9-1 | BPDA3-PMDA7-PDA | 2.335 | BPDA_H-DABA-mPDA | 44.96 | 3.58 | 0.114 |
9-2 | BPDA3-PMDA7-PDA | 2.335 | 6FDA-PMDA-PDA | 3.926 | 3.7 | 0.022 |
시험적층체 No. | 디본딩층의 제1폴리이미드계 수지(경화온도 300℃) | CTE(ppm/℃) | 가요성 기판의 제2폴리이미드계 수지 (경화온도 350℃) | CTE(ppm/℃) | 접착력(N/cm) | 박리강도(N/cm) |
10-1 | BPDA3-PMDA7-PDA | 2.335 | BPDA_H-DABA-mPDA | 44.96 | 3.58 | 0.114 |
10-2 | BPDA2-PMDA8-PDA | 1.920 | 3.66 | 0.092 | ||
10-3 | BPDA1-PMDA9-PDA | 1.581 | 3.56 | 0.074 | ||
10-4 | PMDA-PDA | 1.348 | 3.64 | 0.052 | ||
10-5(비교예) | - | - | 3.55 | 0.737 |
Claims (24)
- 캐리어 기판;상기 캐리어 기판의 일면 또는 양면에 위치하는 제1 폴리이미드계 수지층; 및상기 제1 폴리이미드계 수지층 상에 위치하는 제2 폴리이미드계 수지층을 포함하며,상기 제1 폴리이미드계 수지층의 100 내지 200℃ 온도 구간에서의 열팽창계수(CTE)는 상기 제2 폴리이미드계 수지층의 동일 온도 구간에서의 열팽창계수(CTE)와 동등하거나 보다 낮고, 상기 제1 폴리이미드계 수지층의 화학적 변화를 야기 하지 않는 물리적 자극에 의해 상기 제2 폴리이미드계 수지층에 대한 제1 폴리이미드계 수지층의 접착력이 감소되는 것인 적층체.
- 제1항에 있어서,상기 제1 폴리이미드계 수지층과 제2 폴리이미드 수지층의 100 내지 200℃ 온도 구간에서의 열팽창계수(CTE)는 그 차가 60ppm/℃ 이하인, 적층체.
- 제1항에 있어서,상기 물리적 자극이 상기 적층체의 적층 단면을 노출시키는 것인 적층체.
- 제1항에 있어서,상기 제1 폴리이미드계 수지층이 물리적 자극이 가해지기 전에는 상기 제2 폴리이미드계 수지층에 대해 1N/cm 이상의 접착력을 나타내고, 물리적 자극이 가해진 후에는 상기 제2 폴리이미드계 수지층에 대해 0.3N/cm 이하의 박리 강도를 나타내는 것인 적층체.
- 제1항에 있어서,상기 제1 폴리이미드계 수지층 하기 수학식 1에 의해 계산되는 유사도값이 0.5 이하인 제1 폴리이미드 수지를 포함하는 것인, 적층체:[수학식 1]상기 식에서,k0 = 2.00,y0 = -1.00,k1 = 206.67,k2 = 124.78,k3 = 3.20,k4 = 5.90,Coeffi 와 Coeffj 는 각각 폴리이미드의 모노머인 이무수물 i와 디아민 j의 구조로부터 계산된 분자 비구면계수(molecular asphericity) 이고,Vi와 Vj 는 각각 모노머인 이무수물 i와 디아민 j의 구조로부터 계산된 맥그로운 체적(McGrown Volume) 이며,상기 분자 비구면계수 및 맥그로운 체적은 아드리아나.코드(ADRIANA.Code) 프로그램(Molecular Networks GmbH 사)을 사용하여 계산되는 것이고,
- 제1항에 있어서,상기 제1폴리이미드계 수지가 폴리아믹산계 수지를 포함하는 조성물을 도포하고 500℃ 이상의 온도에서 이미드화를 진행한 후에 IR 스펙트럼의 1350 내지 1400 cm-1 또는 1550 내지 1650 cm-1에서 나타나는 CN 밴드의 적분 강도 100%에 대하여, 200℃ 이상의 온도에서 이미드화를 진행한 후의 CN 밴드의 상대적 적분 강도 비율을 이미드화율이라 할 때, 60% 내지 99%의 이미드화율을 갖는 것인 적층체.
- 제1항에 있어서,상기 제1폴리이미드계 수지가 200℃ 이상의 유리전이온도를 갖는 것인 적층체.
- 제1항에 있어서,상기 제1폴리이미드계 수지층이 폴리이미드계 수지 또는 그 전구체를 포함하는 조성물을 캐리어 기판 위에 도포한 후 200℃ 이상이며 상기 제2 폴리이미드계 수지층의 경화온도와 동등한 온도 또는 0 내지 200℃ 낮은 온도에서 경화시켜 제조된 것인 적층체.
- 제1항에 있어서,상기 제1 폴리이미드계 수지층이 하기 화학식 1의 방향족 테트라카르복실산 이무수물과 직선형 구조를 갖는 방향족 다이아민 화합물을 반응시켜 제조한 폴리아믹산을 200℃ 이상의 온도에서 경화시켜 제조된 것인 제1 폴리이미드 수지를 포함하는 것인 적층체:[화학식 1]상기 화학식 1에서, A는 하기 화학식 2a 또는 2b의 방향족 4가 유기기이며,[화학식 2a][화학식 2b]상기 화학식 2a 및 2b에서,R11 내지 R14는 각각 독립적으로 탄소수 1 내지 4의 알킬기 또는 탄소수 1 내지 4의 할로알킬기이고, 그리고a는 0 내지 3의 정수, b는 0 내지 2의 정수, c 및 e는 각각 독립적으로 0 내지 3의 정수, d는 0 내지 4의 정수, 그리고 f는 0 내지 3의 정수이다.
- 제9항에 있어서,상기 방향족 다이아민 화합물은 하기 화학식 4a 또는 4b의 방향족 다이아민 화합물인 것인 적층체:[화학식 4a][화학식 4b]상기 식에서,R21 내지 R23은 각각 독립적으로, 탄소수 1 내지 10의 알킬기 또는 탄소수 1 내지 10의 할로알킬기이고,X는 각각 독립적으로 -O-, -CR24R25-, -C(=O)-, -C(=O)O-, -C(=O)NH-, -S-, -SO-, -SO2-, -O[CH2CH2O]q-, 탄소수 6 내지 18의 일환식 또는 다환식의 시클로알킬렌기, 탄소수 6 내지 18의 일환식 또는 다환식의 아릴렌기 및 이들의 조합으로 이루어진 군에서 선택되며, 이때 상기 R24 및 R25는 각각 독립적으로 수소원자, 탄소수 1 내지 10의 알킬기 및 탄소수 1 내지 10의 할로알킬기로 이루어진 군에서 선택되며, q는 1 또는 2의 정수이고,l, m 및 n은 각각 독립적으로 0 내지 4의 정수이고, 그리고p은 0 또는 1의 정수이다.
- 제1항에 있어서,상기 제1폴리이미드계 수지층이 100 내지 200℃의 조건에서 30ppm/℃ 이하의 열 팽창 계수 및 450℃ 이상의 1% 열분해온도(Td1%)를 갖는 것인 적층체.
- 제1항에 있어서,상기 제1폴리이미드계 수지층이 0.05 내지 5㎛의 두께를 갖는 것인 적층체.
- 제1항에 있어서,상기 제2 폴리이미드계 수지층이 이미드화율이 50 내지 99%이고, 유리전이온도가 200℃ 이상인 제2폴리이미드계 수지를 포함하는 것인 적층체.
- 캐리어 기판의 일면 또는 양면에, 제1폴리이미드계 수지를 포함하는 제1 폴리이미드계 수지층을 형성하는 단계; 및상기 제1 폴리이미드계 수지층 상에 제2폴리이미드계 수지의 전구체를 포함하는 조성물을 캐스팅 한 후 경화시켜 제2 폴리이미드계 수지층을 형성하는 단계를 포함하며,상기 제1 폴리이미드계 수지층의 100 내지 200℃ 온도 구간에서의 열팽창계수(CTE)는 상기 제2 폴리이미드계 수지층의 동일 온도 구간에서의 열팽창계수(CTE)와 동등하거나 보다 낮고, 상기 물리적 자극에 의해 상기 제2 폴리이미드계 수지층에 대한 접착력이 감소되는 것인, 적층체의 제조방법.
- 제14항에 있어서,상기 제1 폴리이미드계 수지층은 캐리어 기판의 일면 또는 양면에 제1폴리이미드계 수지 또는 그 전구체를 포함하는 조성물을 도포한 후 경화시켜 제1 폴리이미드계 수지층을 형성하는 것인, 적층체의 제조방법.
- 제15항에 있어서,상기 제1 폴리이미드계 수지층 형성시 경화 공정이 200℃ 이상의 온도에서 실시되고, 상기 제2 폴리이미드계 수지층 형성시 경화 공정은 상기 제1 폴리이미드계 수지층의 형성시 경화온도와 동등한 온도 또는 0 내지 200℃ 높은 온도에서 실시되는 것인 적층체의 제조방법.
- 제15항에 있어서,상기 제1 또는 제2 폴리이미드계 수지층 형성 단계 후 300℃ 이상의 온도에서 1분 내지 30분 동안 열처리하는 단계를 더 포함하는 적층체의 제조방법.
- 캐리어 기판의 일면 또는 양면에 제1폴리이미드계 수지를 포함하는 제1 폴리이미드계 수지층을 형성하는 단계;상기 제1 폴리이미드계 수지층 상에 제2폴리이미드계 수지 또는 그 전구체를 포함하는 조성물을 도포한 후 경화시켜 제2폴리이미드계 수지층이 형성된 적층체를 제조하는 단계; 및상기 적층체에 상기 제1 폴리이미드계 수지층의 화학적 변화를 야기하지 않는 물리적인 자극을 가한 후 상기 제2 폴리이미드계 수지층을 제1 폴리이미드계 수지층이 형성된 캐리어 기판으로부터 분리하는 단계를 포함하며,상기 제1 폴리이미드계 수지층의 100 내지 200℃ 온도 구간에서의 열팽창계수(CTE)는 상기 제2 폴리이미드계 수지층의 동일 온도 구간에서의 열팽창계수(CTE)와 동등하거나 보다 낮고, 상기 물리적 자극에 의해 상기 제2 폴리이미드계 수지층에 대한 접착력이 감소되는 것인 소자용 기판의 제조방법.
- 제18항에 있어서,상기 물리적 자극이 상기 적층체의 적층 단면을 노출시키는 것인 소자용 기판의 제조방법.
- 제21항의 제조방법에 의해 제조된 소자용 기판.
- 캐리어 기판의 일면 또는 양면에 제1폴리이미드계 수지를 포함하는 제1 폴리이미드계 수지층을 형성하는 단계;상기 제1 폴리이미드계 수지층 상에 제2폴리이미드계 수지 또는 그 전구체를 포함하는 조성물을 도포한 후 경화시켜 제2폴리이미드계 수지층이 형성된 적층체를 제조하는 단계;상기 적층체의 가요성 기판 상에 소자 구조를 형성하는 단계; 및상기 소자 구조가 형성된 적층체에 상기 제1 폴리이미드계 수지층의 화학적 변화를 야기하지 않는 물리적 자극을 가한 후에, 상기 소자 구조가 형성된 제2 폴리이미드계 수지층을을 상기 적층체의 디본딩층으로부터 분리하는 단계를 포함하며,상기 제1 폴리이미드계 수지층의 100 내지 200℃의 온도 구간에서의 열팽창계수(CTE)는 상기 제2 폴리이미드계 수지층의 동일 온도 구간에서의 열팽창계수(CTE)와 동등하거나 보다 낮고, 상기 물리적 자극에 의해 상기 제2 폴리이미드계 수지층에 대한 접착력이 감소되는 것인 소자의 제조방법.
- 제21항에 따른 제조방법에 의해 제조된 소자.
- 제22항에 있어서,상기 소자가 태양전지, 유기발광다이오드 조명, 반도체 소자, 및 디스플레이 소자로 이루어진 군에서 선택되는 것인 소자.
- 제23항에 있어서,상기 디스플레이 소자가 플렉서블 유기전계발광소자인 것인 소자.
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