Method for manufacturing a roll-shaped laminate

Abstract

The present application provides a method for manufacturing a roll-shaped laminate, comprising the steps of: providing a composite film comprising a metal foil and a polymer layer, wherein the metal foil has a first metal surface and a second metal surface opposite to the first metal surface, and the polymer layer is on the second metal surface; providing a carrier tape having a first carrier surface and a second carrier surface opposite to the first carrier surface, and the first carrier surface of the carrier tape has a plurality of protrusions; arranging the composite film on the carrier tape with the first metal surface facing the second carrier surface; arranging a side strip on the carrier tape corresponding to the plurality of protrusions; and rolling up at least the carrier tape, the composite film arranged thereon and the side strip to form the roll-shaped laminate.

Description

TECHNICAL FIELD

[0001] The present application relates to a manufacturing method of a laminate, and in particular, to a manufacturing method of a roll-shaped laminate. BACKGROUND

[0002] A flexible copper foil substrate is one of raw materials for manufacturing a flexible electronic device. A manufacturing method thereof is mostly to form a roll-shaped laminate by winding a copper foil and a polymer material coated thereon in a roll-to-roll manner to perform a subsequent process, and then, to cut the roll-shaped laminate in a proper size.

[0003] However, in the manufacturing process of the roll-shaped laminate, the corresponding film layer or sheet is wound in a roll shape in an oven to perform baking to cyclize the polymer material. Generally, the cyclization step requires a long time, and in the baking process, a condition of sticking of a glue surface (generally, a polymer) often occurs. Also, after the corresponding film layer or sheet is wound in a roll shape, partial wrinkles or unevenness of the film layer or sheet can occur due to the influence of internal stress when a subsequent step is performed. This can have an influence on the quality and appearance of a subsequent product. SUMMARY

[0004] The present application is directed to a manufacturing method of a roll-shaped laminate which can have a better process quality. Also, the roll-shaped laminate constituted thereby can have a better quality and / or product appearance.

[0005] According to an embodiment of the present application, a manufacturing method of a roll-shaped laminate includes the steps of: providing a composite film including a metal foil having a first metal surface and a second metal surface opposite to the first metal surface, and a polymer layer on the second metal surface of the metal foil; providing a carrier tape having a first carrier surface and a second carrier surface opposite to the first carrier surface, and a plurality of protrusions on the first carrier surface of the carrier tape; disposing the composite film on the carrier tape with the first metal surface facing the second carrier surface; disposing a border on the carrier tape corresponding to the plurality of protrusions; and winding at least the carrier tape, the composite film disposed on the carrier tape, and the border disposed on the carrier tape to constitute a roll-shaped laminate.

[0006] According to an embodiment of the present application, the plurality of protrusions are separated from each other.

[0007] According to an embodiment of the present application, the plurality of protrusions are distributed on opposite sides in a width direction of the carrier tape.

[0008] According to one embodiment of the present invention, the method for manufacturing a rolled laminate further includes the following steps: after rolling up the carrier tape, the composite film arranged on the carrier tape, and the edge strip arranged on the carrier tape, a baking step is performed, and in the baking step, the baking airflow direction is basically parallel to the width direction of the carrier tape so that the airflow can flow between the carrier tape and the composite film.

[0009] According to an embodiment of the present invention, in the baking step, the maximum baking temperature is greater than or equal to 300° C., and the baking time is greater than or equal to 1 hour.

[0010] According to one embodiment of the present invention, the method for manufacturing a rolled laminate further includes the following steps: in the process of arranging the composite film on the carrier, tension is applied to the composite film and the carrier in a direction parallel to the conveying direction of the composite film or the carrier, and after the composite film is arranged on the carrier, the first metal surface directly contacts the second carrier surface.

[0011] According to one embodiment of the present invention, the tension applied to the carrier tape has a first ratio to the cross-sectional area of ​​the carrier tape, and the tension applied to the composite film has a second ratio to the cross-sectional area of ​​the metal foil, and the first ratio is smaller than the second ratio.

[0012] According to one embodiment of the present invention, the material of the carrier tape has a first linear thermal expansion coefficient, the material of the metal foil has a second linear thermal expansion coefficient, and the ratio of the first linear thermal expansion coefficient to the second linear thermal expansion coefficient is between 0.6 and 1.2; and the ratio of the first ratio to the second ratio is between 0.01 and 0.18.

[0013] According to one embodiment of the present invention, the first ratio is between 0.006 kg / mm 2 ~0.056kg / mm 2 .

[0014] According to one embodiment of the present invention, the second ratio is between 0.309 kg / mm 2 ~0.720kg / mm 2 .

[0015] Based on the above, the method for manufacturing a roll-shaped laminated body of the present invention can have better process quality, and the resulting roll-shaped laminated body can have better quality and / or product appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a partial perspective schematic diagram of a partial method for manufacturing a rolled laminate according to one embodiment of the present invention;

[0017] Figure 2 is a partial perspective schematic diagram of a partial method for manufacturing a rolled laminate according to one embodiment of the present invention;

[0018] Figure 3 Fig. 6 is a partial side view schematic of a part of a manufacturing method of a roll-shaped laminate according to an embodiment of the present application;

[0019] Figure 4 Fig. 7 is a partial side view schematic of a part of a manufacturing method of a roll-shaped laminate according to an embodiment of the present application.

[0020] BRIEF DESCRIPTION OF DRAWINGS

[0021] 110: composite film;

[0022] 112: metal foil;

[0023] 112a: first metal surface;

[0024] 112b: second metal surface;

[0025] 111: polymer layer;

[0026] 118: polymer material;

[0027] 120: carrier tape;

[0028] 120a: first carrier surface;

[0029] 120b: second carrier surface;

[0030] 123: protrusion;

[0031] 130: edge strip;

[0032] 800: roll-to-roll apparatus;

[0033] 812, 820, 830, 840, 890: roller;

[0034] 880: coating device;

[0035] 980: oven;

[0036] 990: flow guide device;

[0037] 991: plate body;

[0038] 992: air hole;

[0039] 993: flow guide wall;

[0040] 109: roll-shaped laminate intermediate;

[0041] 110h, 112h, 120h, 130h: thickness;

[0042] 111w, 112w, 120w: width;

[0043] D1: width direction;

[0044] D2: airflow direction;

[0045] F1, F2, F3: airflow. DETAILED DESCRIPTION

[0046] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

[0047] In the drawings, some components, units, and / or assemblies may be exaggerated or reduced in size for clarity. Furthermore, some components, units, and / or assemblies may be omitted or labeled in the drawings for clarity. Furthermore, the numerical values ​​indicated in this specification may include the stated values ​​as well as deviations within a range acceptable to those skilled in the art.

[0048] Additionally, relative terms such as "upper" or "lower" may be used herein to describe the relationship of one component to another component, as illustrated in the accompanying figures. It should be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation illustrated in the accompanying figures. For example, if the device in one of the accompanying figures is turned over, a component described as being on the "lower" side of other components would be oriented on the "upper" side of the other components. Thus, the exemplary term "lower" can encompass both "lower" and "upper" orientations, depending on the particular orientation of the accompanying figure. Similarly, if the device in one of the accompanying figures is turned over, a component described as being "below" other components would be oriented "above" the other components.

[0049] As used herein, "substantially" and "about" include the stated value and the average value within an acceptable deviation range of the particular value determined by one of ordinary skill in the art, which can be expressed as "about the stated value"; or, directly expressed as "the stated value". And, taking into account the measurement in question and the specific amount of error associated with the measurement (i.e., the limitations of the measurement system).

[0050] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present invention, and will not be interpreted as idealized or overly formal unless explicitly defined as such herein.

[0051] In the method for manufacturing a roll-shaped laminated body of this embodiment, some steps may be performed via a roll-to-roll apparatus 800 .

[0052] by Figure 1For example, a metal foil 112 can be provided via a supply roller 812. The metal foil 112 can have a first metal surface 112a and a second metal surface 112b opposite the first metal surface 112a. The metal foil 112 can be, for example, copper foil, but the present invention is not limited thereto. The coefficient of linear thermal expansion (CLTE) of copper is approximately 16.5 to 16.7 ppm / °C.

[0053] Please continue Figure 1 , a polymer layer 111 may be formed on the second metal surface 112 b of the metal foil 112 .

[0054] In one embodiment, the polymer material 118 can be coated onto the second metal surface 112b of the metal foil 112 by a coating device 880. The polymer material 118 can include polyimide (PI; such as thermoplastic polyimide or thermosetting polyimide), liquid crystal polymer (LCP), or other suitable polymers, and the aforementioned polymers can be dissolved in corresponding solvents.

[0055] In one embodiment, after the polymer material 118 is coated on the second metal surface 112 b of the metal foil 112 , it may be subjected to appropriate methods (such as heating or other appropriate pre-curing steps) to form a corresponding polymer layer 111 .

[0056] For example, a heating zone may be provided between the coating device 880 and the pressing roller 840 along the conveying direction of the composite film 110. In the heating zone, the polymer material 118 coated on the second metal surface 112b of the metal foil 112 may be heated and pre-cured by a corresponding heating device (e.g., a baking oven or heating lamp; not shown).

[0057] For another example, the pressing roller 840 may be thermally coupled to a thermocouple to provide a heating function.

[0058] In one embodiment, the polymer layer 111 may be a single film layer, but the present invention is not limited thereto.

[0059] In one embodiment, the polymer layer 111 may be a stack of multiple film layers of the same or different types. For example, the polymer layer 111 may be formed by stacking multiple film layers through multiple coating and / or corresponding pre-curing steps.

[0060] In one embodiment, the width 111w of the polymer layer 111 can be similar to or the same as the width of the metal foil 112 in the width direction D1. For example, the width of the polymer layer 111 can be about 95% to 100% of the width of the metal foil 112.

[0061] Please continue Figure 1 The carrier tape 120 can be provided via the supply roller 820. The carrier tape 120 can be a metal tape based on subsequent steps (e.g., a heating step) and considerations of load bearing.

[0062] In the present embodiment, the carrier tape 120 is, for example, a steel tape, but the present application is not limited thereto. The material of the steel tape can include generally common or commonly used steel materials (e.g., 201 steel material, 204 steel material, 304 steel material, 316 steel material, or 430 steel material, but not limited). The linear thermal expansion coefficient of the generally common or commonly used steel materials is about 10.5 to 16.0 ppm / °C. The foregoing generally common or commonly used steel materials are relatively inexpensive compared to invar (e.g., Invar 36 alloy).

[0063] In the present embodiment, the carrier tape 120 has a first carrier surface 120a and a second carrier surface 120b opposite to the first carrier surface 120a. The first carrier surface 120a of the carrier tape 120 has a plurality of protrusions 123. For example, the plurality of protrusions 123 can be formed on the first carrier surface 120a of the carrier tape 120 via an embossing method. In one embodiment, the plurality of protrusions 123 are separated from each other, and / or the plurality of protrusions 123 are distributed on opposite sides in the width direction D1 of the carrier tape 120.

[0064] In addition, the present application does not limit the shape of the protrusions 123. For example, as shown in FIGS. 12A and 12B, the shape of the protrusions 123 can be similar to a cone shape. In an embodiment not shown, the shape of the protrusions 123 can be similar to a column shape or a frustum shape. Figure 3 or Figure 4

[0065] In addition, for the sake of clarity, not all of the protrusions 123 are labeled in the drawings.

[0066] Please continue Figure 1 The composite film 110 is arranged on the carrier tape 120 in such a way that the first metal surface 112a of the metal foil 112 faces the second carrier surface 120b of the carrier tape 120. For example, the relative positions between the supply roller 812 and the pressing roller 840 and the relative positions between the supply roller 820 and the pressing roller 840 can be adjusted so that the first metal surface 112a of the metal foil 112 contacts and adheres to the second carrier surface 120b of the carrier tape 120.

[0067] ​In one embodiment, the thickness 120h of the carrier tape 120 may be greater than the thickness 110h of the composite film 110. In this way, the carrier tape 120 may have better load-bearing properties.

[0068] In one embodiment, the composite film 110 can be subjected to corresponding tension in its conveying direction by adjusting the relative rotation speed between the supply roller 812 and the pressing roller 840. For example, the rotation speed of the supply roller 812 can be made slower than that of the pressing roller 840.

[0069] In an embodiment not shown, a tension adjustment wheel (not shown) may be provided between the supply roller 812 and the pressing roller 840 along the conveying direction of the composite film 110. The tension adjustment wheel may be suitable for conveying the composite film 110, and may apply a corresponding tension to the composite film 110 in the conveying direction by adjusting the relative rotation speed and / or relative position of the tension adjustment wheel and the pressing roller 840.

[0070] In one embodiment, the carrier tape 120 may be subjected to corresponding tension in its conveying direction by adjusting the relative rotation speed between the supply roller 820 and the pressing roller 840. For example, the rotation speed of the supply roller 820 may be slower than that of the pressing roller 840.

[0071] In an embodiment not shown, a tension adjustment wheel (not shown) may be provided between the supply roller 820 and the pressing roller 840 along the conveying direction of the carrier tape 120. The tension adjustment wheel may be adapted to convey the carrier tape 120 and may apply a corresponding tension to the carrier tape 120 in the conveying direction by adjusting the relative rotation speed and / or relative position between the tension adjustment wheel and the pressing roller 840.

[0072] In this embodiment, the width of the composite film 110 in the width direction D1 (e.g., defined by the width 112w of the metal foil 112) may be smaller than the width 120w of the carrier tape 120. For example, the width 112w of the metal foil 112 may be approximately 85% to 95% of the width 120w of the carrier tape 120.

[0073] In this embodiment, after the composite film 110 is disposed on the carrier tape 120 , the composite film 110 does not overlap any protrusion 123 in the width direction D1 and / or thickness direction (eg, direction corresponding to the thickness 120 h ) of the carrier tape 120 .

[0074] In this embodiment, the carrier tape 120 is substantially free of any holes at the locations where the composite film 110 is disposed. Specifically, after the composite film 110 is disposed on the carrier tape 120, in the width direction D1 of the carrier tape 120, the carrier tape 120 is substantially free of any holes at both sides of the composite film 110 or at the locations where the composite film 110 is disposed. Taking a metal tape as an example, if holes are to be formed over a large distribution range and / or a large number of holes are to be formed, most of the holes are formed through a stamping process. However, if other film layers (e.g., the same or similar to the aforementioned composite film 110) are to be disposed on a metal tape having holes, defects (e.g., burrs, ripples, or tears) formed in the aforementioned stamping process may cause damage or destruction to the film layers disposed thereon.

[0075] In this embodiment, the tension applied to the carrier tape 120 and the cross-sectional area of ​​the carrier tape 120 (approximately: thickness 120h × width 120w) have a first ratio (i.e., tension applied to the carrier tape 120 / cross-sectional area of ​​the carrier tape 120), and the tension applied to the composite film 110 and the cross-sectional area of ​​the metal foil 112 (approximately: thickness 112h × width 112w) have a second ratio (i.e., tension applied to the composite film 110 / cross-sectional area of ​​the metal foil 112), with the first ratio being less than the second ratio. In one embodiment, the material of the carrier tape 120 has a first linear coefficient of thermal expansion, and the material of the metal foil 112 has a second linear coefficient of thermal expansion. The ratio of the first linear coefficient of thermal expansion to the second linear coefficient of thermal expansion (i.e., first linear coefficient of thermal expansion / second linear coefficient of thermal expansion) is between 0.6 and 1.2, and the ratio of the first ratio to the second ratio (i.e., first ratio / second ratio) is between 0.01 and 0.18. In this way, the quality of the formed rolled laminate can be improved in the subsequent heating step.

[0076] In one embodiment, the first ratio may be between 0.006 kg / mm 2 ~0.056kg / mm 2 ; and / or, the second ratio may be between 0.309kg / mm 2 ~0.720kg / mm 2 .

[0077] Please continue Figure 1 The edge strip 130 can be provided via the supply roller 830. The edge strip 130 can be disposed on the carrier tape 120, and in the thickness direction of the carrier tape 120, the edge strip 130 overlaps with the plurality of protrusions 123. The material of the edge strip 130 can include common or commonly used steel. The thickness 130h of the edge strip 130 is greater than the thickness 110h of the composite film 110.

[0078] Please continue Figure 1The carrier tape 120, the composite film 110 disposed on the carrier tape 120, and the edge strip 130 disposed on the carrier tape 120 are rolled up to form the roll-shaped laminated intermediate 109.

[0079] It is worth noting that, in the embodiment shown, the composite film 110 is disposed on the carrier tape 120 first; then the edge strip 130 is disposed on the carrier tape 120, but the present application is not limited thereto. In an embodiment not shown, the edge strip 130 can be disposed on the carrier tape 120 first; then the composite film 110 is disposed on the carrier tape 120. Figure 1 It is worth noting that, in the embodiment shown, the edge strip 130 first contacts the plurality of protrusions 123 on the carrier tape 120, but the present application is not limited thereto. As long as the edge strip 130 contacts the plurality of protrusions 123 on the carrier tape 120, as shown in FIGS. 1A and 1B, the present application is not limited thereto.

[0080] Figure 1 It is worth noting that, in the embodiment shown, the edge strip 130 first contacts the plurality of protrusions 123 on the carrier tape 120, but the present application is not limited thereto. As long as the edge strip 130 contacts the plurality of protrusions 123 on the carrier tape 120, as shown in FIGS. 1A and 1B, the present application is not limited thereto. Figure 3 Figure 4 In the roll-shaped laminated intermediate 109, the inner side of the edge strip 130 can contact the plurality of protrusions 123 of the inner layer of the carrier tape 120, and the outer side of the edge strip 130 can contact the second carrier surface 120b of the outer layer of the carrier tape 120, as shown in FIGS. 1A and 1B.

[0081] Please refer to Figure 2 The roll-shaped laminated intermediate 109 can be placed in an oven 980 to perform a baking step. Before the roll-shaped laminated intermediate 109 is placed in the oven, the corresponding cutting, fixing, handling, or other finishing steps can be found in the commonly used roll-to-roll process, which will not be described here. Through the aforementioned baking step, the solvent can be volatilized and / or the polymer material can be polymerized or cured.

[0082] In the aforementioned baking step, the maximum temperature of the baking is greater than or equal to 300°C, and the baking time is greater than or equal to 1 hour.

[0083] In the aforementioned baking step, the direction D2 of the hot gas flow used for baking can be substantially parallel to the width direction D1 of the carrier tape 120 through the flow guide device 990, and the hot gas can flow between the composite film 110 and the carrier tape 120.

[0084] In the present embodiment, through the protrusions 123 of the carrier tape 120 and the edge strip 130 disposed corresponding to the protrusions 123, the possibility of the polymer material that has not yet completely polymerized or cured adhering to the first carrier surface 120a of the carrier tape 120 can be reduced. Further, since the thickness 130h of the edge strip 130 is greater than the thickness 110h of the composite film 110, when the roll-shaped laminated intermediate 109 is wound and stacked, gaps can be formed between the carrier tapes 120, so that the hot gas flow can also easily flow between the wound carrier tapes 120. In this way, the solvent can also be easily volatilized, and / or the quality of the polymerization or curing of the polymer material can be improved.​​

[0085] For example, the oven 980 may have corresponding gas inlet and outlet holes, and a flow guide device 990 may be disposed within the oven 980. The flow guide device 990 may be a plate 991 having air holes 992 and flow guide walls 993 corresponding to the air holes 992. The roll-shaped laminated intermediate 109 may be placed corresponding to the air holes 992, with the width direction D1 substantially parallel to the extension direction of the flow guide walls 993 and / or the normal direction of the surface of the plate 991. In this way, of the airflow within the oven 980, a portion of the airflow F1 corresponding to the air holes 992 can pass through the air holes 992, while another portion of the airflow F3 corresponding to the air holes 992 may be blocked by the plate 991. Furthermore, the flow guide walls 993 can guide the airflow F2 passing through the air holes 992 so that the airflow direction D2 can be substantially parallel to the width direction D1 of the carrier tape 120. In this way, the directionality of the airflow flowing between the composite film 110 and the carrier tape 120 can be made consistent, thereby improving the efficiency or effect of solvent volatilization and / or polymer material polymerization or curing.

[0086] It is worth noting that Figure 2 In the figure, the direction of each airflow is shown schematically only. That is, the direction of the airflow can be understood by a person skilled in the art of the present invention according to the corresponding device and placement state, and can be determined by Figure 2 The schematic illustrations and the corresponding contents are to be understood or implemented equally based on them.

[0087] In this embodiment, since corresponding tensions are applied to the carrier tape 120 and the composite film 110 during the process of forming the roll-shaped laminated intermediate 109, the influence of internal stress caused by material expansion can be reduced during the aforementioned baking step, thereby achieving better process quality.

[0088] After the aforementioned baking step, the roll-shaped laminate intermediate 109 has been substantially formed into a corresponding roll-shaped laminate. The appearance or shape of the roll-shaped laminate may be similar to that of the roll-shaped laminate intermediate 109, and thus will not be repeatedly illustrated.

[0089] In one embodiment, the carrier tape 120 in the roll laminate can be separated from the composite film 110 (which includes the metal foil 112 and the cured polymer layer 111). Furthermore, after the composite film 110 is appropriately cut, a flexible copper foil substrate of appropriate size can be formed.

[0090] [Examples and Comparative Examples]

[0091] The present invention will be described in detail below with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples at all.

[0092] Each example and comparative example may be formed into a corresponding rolled laminated body through the above-mentioned method.

[0093] In each example and comparative example, the metal foil used is a copper foil. The width of the copper foil is about 540 millimeters (mm), and the thickness of the copper foil is about 12 to 18 micrometers (μm).

[0094] In each example and comparative example, the width of the polymer layer formed on the copper foil is about 535 mm, and the thickness of the polymer layer is about 12 to 50 μm. The material of the polymer layer may include polyimide.

[0095] In each example and comparative example, the carrier tape used was a steel tape having a width of approximately 600 millimeters (mm) and a thickness as shown in Table 1. The height of the protrusions formed on the steel tape was approximately twice the thickness of the steel tape.

[0096] In each example and comparative example, the corresponding manufacturing parameters and the corresponding rolled laminated body results are shown in [Table 1].

[0097] In the method of evaluating each corresponding rolled laminated body, the corresponding evaluation can be performed in the following method.

[0098] Workmanship quality: Randomly sample an area of ​​approximately 200mm x 250mm from the roll-form laminate and roughly estimate the percentage of the sticking area.

[0099] Tension testing: Test specimens approximately 200mm x 250mm in size are directly or indirectly tested and evaluated for tensile strength, elongation, and Young's modulus using a commercially available universal testing machine according to ASTM D3039 / D3039M (Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials).

[0100] Test piece appearance quality: The cyclization rate of a polymer layer (e.g., polyimide) can be quantitatively measured using common methods (e.g., infrared characteristic peak spectrum comparison). Generally speaking, if the cyclization rate is greater than 70%, the color difference of the polymer layer is within the acceptable range for human observation.

[0101]

[0102] As shown in [Table 1], the method for manufacturing a roll-shaped laminate of the present invention can achieve a lower sticking ratio and better process quality during the manufacturing process.

[0103] As shown in [Table 1], the roll-shaped laminated body produced by the method for producing the roll-shaped laminated body of the present invention can have better quality (eg, better tensile strength, elongation and / or Young's modulus).

[0104] As shown in [Table 1], the roll-shaped laminated body produced by the method for producing the roll-shaped laminated body of the present invention can have a better product appearance (eg, lower color difference).

[0105] As shown in [Table 1], it can be seen from the comparison between Example 1 and Comparative Example 1 that when baking with a steel strip, gaps can be created between the rolled laminates, which slightly increases the cyclization rate of the film material.

[0106] As shown in [Table 1], it can be seen from Examples 2 to 6 that when the tension between the steel strip and the material is increased, and the thickness of the steel strip and the edge strip is increased, the interlayer gap in the rolled laminate is increased, the adhesion ratio of the film material can be effectively reduced, and the cyclization rate of the film material can be gradually improved.

[0107] As shown in [Table 1], it can be seen from Examples 7 to 10 that when the material tension is within a specific range, the tension is sufficient to eliminate the sticking caused by thermal expansion of the material during baking, thereby significantly improving the cyclization rate of the film material and greatly improving the sticking ratio.

[0108] As shown in [Table 1], it can be seen from Example 11 that when the material tension is too large, it will cause wrinkles in the film material and cause adhesion.

[0109] In summary, the method for manufacturing a roll-shaped laminated body of the present invention can achieve better process quality, and the resulting roll-shaped laminated body can have better quality and / or product appearance.

[0110] [Practicality]

[0111] The roll-shaped laminate manufacturing method of the present invention can form a corresponding roll-shaped laminate. The roll-shaped laminate can then be further processed through corresponding steps to form a flexible copper foil substrate of appropriate size. Flexible copper foil substrate is one of the raw materials for manufacturing flexible electronic devices.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for producing a rolled laminate, characterized in that: include: A composite film is provided, comprising a metal foil and at least one polymer layer, wherein the metal foil has a first metal surface and a second metal surface opposite to the first metal surface, and the polymer layer is located on the second metal surface of the metal foil; Providing a carrier tape having a first carrying surface and a second carrying surface opposite to the first carrying surface, wherein the first carrying surface of the carrier tape has a plurality of protrusions; disposing the composite film on the carrier tape with the first metal surface facing the second carrier surface; Disposing at least one side strip on the carrier tape in a manner corresponding to the plurality of protrusions; as well as At least the carrier tape, the composite film disposed on the carrier tape, and the edge strip disposed on the carrier tape are rolled up to form the roll-shaped laminated body, wherein in the roll-shaped laminated body: The width of the composite film is smaller than the width of the carrier tape; and In the width direction and thickness direction of the carrier tape, the composite film does not overlap any of the plurality of protrusions, wherein: During the process of disposing the composite film on the carrier tape, applying tension to the composite film and the carrier tape in a direction parallel to the conveying direction of the composite film or the carrier tape; The tension value applied to the composite film is in the range of 4 kg to 6 kg; and The tension applied to the carrier tape is in a range of 4 kg to 5 kg.

2. The method for producing a rolled laminate according to claim 1, wherein: The plurality of protrusions are separated from each other.

3. The method for producing a rolled laminate according to claim 1, wherein: The plurality of protrusions are distributed on two opposite sides of the carrier tape in the width direction.

4. The method for producing a rolled laminate according to claim 1, wherein: Also includes: After the carrier tape, the composite film disposed on the carrier tape, and the edge strip disposed on the carrier tape are rolled up, a baking step is performed, and in the baking step, a baking airflow direction is parallel to the width direction of the carrier tape.

5. The method for producing a rolled laminate according to claim 4, wherein: In the baking step, the maximum baking temperature is greater than or equal to 300° C., and the baking time is greater than or equal to 1 hour.

6. The method for producing a rolled laminate according to claim 4, wherein: in: After the composite film is disposed on the carrier tape, the first metal surface directly contacts the second carrier surface.

7. The method for producing a rolled laminate according to claim 6, wherein: The relationship between the tension applied to the carrier tape and the cross-sectional area of ​​the carrier tape has a first ratio, the relationship between the tension applied to the composite film and the cross-sectional area of ​​the metal foil has a second ratio, and the first ratio is smaller than the second ratio.

8. The method for producing a rolled laminate according to claim 7, wherein: in: The material of the carrier tape has a first linear thermal expansion coefficient, the material of the metal foil has a second linear thermal expansion coefficient, and the ratio of the first linear thermal expansion coefficient to the second linear thermal expansion coefficient is between 0.6 and 1.2; and The ratio of the first ratio to the second ratio is between 0.01 and 0.

18.

9. The method for producing a rolled laminate according to claim 8, wherein: The first ratio is between 0.006 kg / mm 2 ~0.056kg / mm 2 .

10. The method for producing a rolled laminate according to claim 8, wherein: The second ratio is between 0.309 kg / mm 2 ~0.720kg / mm 2 .

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