TWI738852B - Adhesive film winding reel and method for manufacturing the same - Google Patents

Abstract

The present invention provides an adhesive tape roll that can be provided in a short time in response to various design changes of the adhesive film.

The adhesive tape package of the present invention includes: a reel core 3 for winding the adhesive film 2 and a film reel 4 of the adhesive film 2 wound on the reel core 3, and no flange is provided on the reel core 3 , A support body 5 is attached to the side of the film roll 4.

Description

Adhesive film roll body and manufacturing method of adhesive film roll body

This technology relates to an adhesive film roll body formed by winding an adhesive film on a reel, and a manufacturing method of the adhesive film roll body. This application is based on Japanese Patent Application No. Japanese Patent Application No. 2016-188158 filed in Japan on September 27, 2016, and claims priority, and this application is incorporated into this application by reference .

Conventionally, an anisotropic conductive film (ACF: Anisotropic Conductive Film) has been used as an adhesive film that electrically connects electronic components to each other, for example, a glass substrate of a liquid crystal panel and an IC chip. Regarding the anisotropic conductive film, for example, the terminal of an electronic component such as an IC chip, an LSI chip, a flexible printed circuit board (FPC), etc., is connected to an electrode formed on a glass substrate or an insulating substrate. In the case where various terminals are connected and electrically connected to each other.

As an anisotropic conductive film, a conductive particle dispersed in an epoxy resin-based insulating adhesive is generally used. It is broken to realize the electrical connection between the IC chip and the ITO electrode, and the mechanical connection between the IC chip and the ITO electrode is realized by hardening the adhesive in this state.

This type of adhesive film is usually shipped in the form of an adhesive film roll. The adhesive film roll system is used to form an adhesive resin layer (adhesive layer) containing conductive particles on the base film that becomes the substrate, and then bond The release film is laminated on the agent resin layer, and it is wound on a reel member in a roll shape. NS Later, when in use, it is rolled out from the reel member and cut to the required length for the connection of electronic parts.

[Prior Technical Literature]

[Patent Literature]

Patent Document 1: JP 2013-220824 A

Patent Document 2: Japanese Patent Application Publication No. 2003-342537

Generally speaking, in order to prevent winding deviation at the time of shipment or transportation, or when unwinding in actual use, the adhesive film is wound on the flanged reel member. The flanged reel member is designed and manufactured according to the width or length of the wound adhesive film.

In recent years, the miniaturization or diversification of electronic parts using adhesive films has been advancing, and adhesive films of various widths or lengths have been required. However, it is necessary to appropriately design various sizes of flange-attached reel members with different winding widths or different winding lengths according to the width or length of the adhesive film. Since the mold must be manufactured each time, it takes time, labor, and cost. Therefore, the required adhesive film roll cannot be provided in a short time. It will also affect research on the mass production of manufactured products using adhesive films.

On the other hand, in recent years, the improvement of the connecting device has become easier, and in consideration of environmental protection (reduction of plastic materials), some users think that the flange is no longer a necessary component. Therefore, it is required that no flange is provided, regardless of the width or film length, an adhesive film roll that can prevent excessive winding deviation. In particular, there is a strong demand for narrow-width adhesive film rolls.

Furthermore, as the structure of the adhesive film roll body without a flange, there is a method of suspending it by a member larger than the flange, but it is not suitable because the volume of the product becomes too large (Patent Document 1).

In addition, there is also a method of treating the side surface of the adhesive film roll itself by coating or the like. However, in the case of a narrow adhesive film, it is obtained by winding after cutting, so each system All products need to be processed on the entire side, which will become a cost increase factor (Patent Document 2).

Therefore, the purpose of the present technology is to provide an adhesive tape roll body and a manufacturing method of the adhesive tape roll body that can be provided in a short time in response to various design changes of the adhesive film.

In order to solve the above-mentioned problems, the adhesive film roll system of the present technology has a reel core and an adhesive film wound around the reel core, and a support is attached to the side of the film roll formed by winding the adhesive film.

In addition, the manufacturing method of the adhesive film roll of the present technology has the following steps: a step of winding an adhesive film on a reel core, and a film reel composed of the adhesive film wound on the reel core The step of attaching the support body to the side.

According to this technology, the adhesive film roll is not provided with a flange on the reel core, so the adhesive film of all sizes can be wound without being affected by the width or length of the adhesive film, and the support is attached to the side of the film roll. Can prevent winding deviation or winding loose. Therefore, according to the present technology, it is possible to provide an adhesive film roll that can be easily and quickly responded to the change of the width or length of the adhesive film.

1: Adhesive film roll body

2: Adhesive film

3: Reel core

3a: Shaft hole

3b: protrusion

4: Film reel

4a: one side

4b: the other side

5: Support

10: Next layer

20: Anisotropic conductive film

21: Basic film

22: Adhesive resin

23: Conductive particles

24: Insulating adhesive layer

25: layer containing conductive particles

26: Anisotropic conductive film

L: The length of the film roll 4 in the radial direction

Fig. 1 is a perspective view showing the appearance of an adhesive film roll body to which this technology is applied.

Fig. 2(A) is a front view of a reel core used in an adhesive film package applying this technology, and Fig. 2(B) is a front view of an adhesive film package applying this technology.

Fig. 3 is a front view showing an example of an adhesive film roll body to which this technology is applied.

Fig. 4 is a front view showing an example of an adhesive film roll body to which this technology is applied.

Fig. 5 is a front view showing an example of an adhesive film roll body to which this technology is applied.

Fig. 6 is a front view showing an example of the adhesive film roll body to which the present technology is applied.

Fig. 7 is a front view showing an example of an adhesive film roll body to which this technology is applied.

Fig. 8 is a front view showing an example of an adhesive film roll body to which the present technology is applied.

Fig. 9(A) is a front view of one side of the film roll with supports attached to both sides of the film roll symmetrically, and Fig. 9(B) is a rear view of the other side.

Fig. 10(A) is a front view of one side of the adhesive film roll body with supports attached to both sides of the film roll asymmetrically, and Fig. 10(B) is a rear view of the other side.

Figure 11 (A) is a cross-sectional view of the adhesive film roll body when a strip-shaped support is attached to both sides of the film roll, and a long support body is pasted through the outermost peripheral surface of the film roll. Fig. 11(B) is a cross-sectional view of the adhesive film roll when a strip-shaped support is attached to both sides of the film roll, and a long support is passed through the shaft hole of the reel core to attach the film roll.

Fig. 12 (A) and (B) are front views of the adhesive film roll body to which the sheet-like support is attached.

Figure 13 is a cross-sectional view showing the part of the film roll where the support is attached.

14(A) is a cross-sectional view showing the structure of an anisotropic conductive film, and FIG. 14(B) is a cross-sectional view showing the structure of an anisotropic conductive film in which a layer containing conductive particles and an insulating adhesive layer are laminated.

Hereinafter, with reference to the drawings, the adhesive film roll body and the method of manufacturing the adhesive film roll body to which this technology is applied will be described in detail. Furthermore, of course, the present technology is not limited to the following embodiments, and various changes can be made without departing from the spirit of the present technology. In addition, the drawings are schematic, and the ratio of each size may be different from the actual one. Please refer to the following description to judge the specific dimensions. In addition, of course, there are also parts with different size relationships or ratios between the drawings.

[Adhesive film roll body]

As shown in Figure 1, the adhesive film roll 1 to which the present technology is applied is provided with a reel core 3 for winding the adhesive film 2 and a film roll 4 of the adhesive film 2 wound on the reel core 3. A support body 5 is attached to the side of the reel 4.

Then the film roll body 1 is manufactured in the following manner, that is, by applying the adhesive film 2 to A fixed length is wound around the reel core 3 to form the film roll 4 of the adhesive film 2, and the support 5 is attached to the side of the film roll 4 via an adhesive. In this state, the film roll body 1 is then sealed and packaged by vacuum packaging or the like with a transparent film, and then shipped. When in use, when it is installed in the connection device of the electronic component or after it is installed in the connection device, the support 5 is peeled off from the side of the film roll 4 and rolled out in order according to the length of use.

Furthermore, the adhesive film roll body 1 may also roll out the adhesive film in the state where the support 5 is attached to the side surface of the film roll 4. In this case, the support 5 naturally peels off from the side of the film roll 4 as the connecting film 2 is rolled out.

Hereinafter, the structure of the adhesive film roll body 1 is demonstrated.

[Reel core]

As shown in FIG. 2, the reel core 3 for winding the adhesive film 2 is formed into a substantially cylindrical shape, and a through or non-penetrating shaft is formed at the center of the adhesive film 2 during winding or unwinding of the adhesive film 2之轴孔3a. In addition, the reel core 3 has a width wider than the width of the adhesive film 2 and is connected to one end of the adhesive film 2 in the longitudinal direction for winding the adhesive film 2.

The reel core 3 can be formed by molding processing or the like using various plastic materials or metal materials, for example. In terms of weight reduction or cost, the reel core 3 is preferably a plastic material. Furthermore, the diameter of the reel core 3 on which the adhesive film 2 is wound is not particularly limited. However, when it is too large, it will become more difficult to set up the device or carry out operations, so it is preferably 50 cm or less, more preferably Below 30cm. The reason is that if it is of this size, it can be carried by one person.

The reel core 3 to which this technology is applied is not provided with flanges. The film roll body 1 prevents the winding deviation due to the support 5 attached to the side surface of the film roll 4, and thus has the same shape retention properties as the film roll body having flanges.

Furthermore, the reel core 3 may also be provided with protrusions 3b across the circumferential direction. The protrusions 3b make the widthwise sides of the outer circumferential surface for the film 2 to be wound to protrude in the radial direction of the film reel 4 to correct the winding. Around the position. By providing the protrusion 3b, in the case where the reel core 3 has a wider width than the width of the adhesive film 2 In this case, the adhesive film 2 can be wound on one side of the outer circumferential surface in the width direction.

[Next film]

Examples of the adhesive film 2 wound on the reel core 3 to form the film reel 4 include the anisotropy used in COG mounting where electronic parts are mounted on a circuit board, etc., or FOG mounting where boards are connected to each other. Conductive film (ACF: Anisotropic Conductive Film), or conductive adhesive film that connects the electrode of the solar cell with the lead plate, etc. The configuration of the anisotropic conductive film 20 as a specific example of the adhesive film 2 will be described in detail later.

[Film Reel]

The film roll 4 is formed by winding the adhesive film 2 on the outer peripheral surface of the reel core 3 with a specific length into a roll shape, and the winding length is not particularly limited. Practically, for example, from the viewpoint of economy based on continuous use, the lower limit is preferably 10 m or more, and more preferably 30 m or more. In addition, from the viewpoint of preventing overflow or sticking, the upper limit is preferably 600 m or less, and more preferably 500 m or less.

In addition, the film roll 4 is formed into a substantially disc shape having a thickness corresponding to the width of the film 2. The width is not particularly limited, but is preferably 5 cm or less, more preferably 1 cm or less, and still more preferably 5 mm or less. In addition, as the width of the adhesive film 2 becomes narrower, it is preferably 0.2 mm or more, more preferably 0.3 mm or more, and even more preferably 0.5 mm or more. In addition, the film roll 4 is attached to the support 5 on the side via an adhesive or adhesive. As a result, the film roll 4 is prevented from being wound off of the adhesive film 2 or deviated from the lower layer of the adhesive film 2 and falling off.

[Support Body]

The material of the support body 5 is not particularly limited. It can be used that has the strength to prevent the winding deviation or the winding separation of the film roll 4, and is easy to stick to the side of the film roll 4 and easy to peel off from the side. The flexible material can be used, for example, dust-free yarn, resin film such as PET or PI, flexible metal plate, paper sheet that is given hardness, strength, flexibility, etc. by processing. In addition, the length or width of the support body 5 can also be appropriately designed.

The support body 5 is attached to the side surface of the film roll 4 via an adhesive, and is suitably peeled off from the side surface of the film roll 4 when the film roll body 1 is used. As an adhesive for attaching the support 5 to the side surface of the film roll 4, a known adhesive or adhesive material can be used. In addition, the adhesive for attaching the support 5 to the side surface of the film roll 4 may have thermosetting or photocuring properties.

Since the film roll body 1 is not provided with a flange on the reel core 3, the film 2 of all sizes can be wound without being affected by the width or length of the film 2, and it can be attached to the side of the film roll 4 Support the body to prevent winding deviation or winding loose. Therefore, according to the present technology, it is possible to provide an adhesive film roll that can be easily and quickly responded to the change of the width or length of the adhesive film.

Furthermore, as described later, since the support body 5 forms the adhesive layer 10 across the layer of the adhesive film 2 between the side surface of the film roll 4, the winding deviation or the winding looseness can be further prevented. In addition, when the support 5 is peeled off from the side of the film roll 4, the adhesive layer 10 is also removed from the side of the film roll 4, thereby preventing adhesion and smoothly rolling out the adhesive film 2.

Then, the film roll body 1 may form the support body 5 into a rectangular shape, for example, and attach one or more of them across the radial direction of the film roll 4 as shown in FIG. 1. At this time, the support 5 can also be attached to the side surface of the film roll 4 radially. In addition, the support 5 can also be attached with a long support 5 across the radial direction. In addition, following the film roll body 1, a plurality of supports 5 may be attached at equal intervals or may be attached at unequal intervals.

In addition, the configuration of attaching the support body 5 to the film roll body 1 can be variously set. For example, assume the following configuration: a configuration in which a plurality of short strips of support 5 are attached across the radial direction of the film roll 4 (Figure 3), or a plurality of long strips are attached in parallel across the radial direction of the film roll 4 The structure of the support 5 of the strip (Figure 4), or the support 5 of the short strip is attached to the side of the reel core 3, the outer edge side of the film reel 4, or the radial direction across the radial direction of the film roll 4 In the middle and other arbitrary positions (Figure 5), or across the radial direction of the film roll 4, the support 5 is attached in a zigzag pattern (Figure 6), or it is in the radial direction of the film roll 4 The structure of attaching the support body 5 non-parallel (Fig. 7), the structure of attaching the corrugated support body 5 (Fig. 8), or the structure of the support body 5 having a non-linear shape such as a rectangular corrugated shape, etc.

In addition, the support 5 may be attached to the reel core 3. Then the film roll 1 attaches a part of the support 5 to the reel core 3. When the film 2 is rolled out, even if the support 5 is not peeled off the side of the film roll 4, it will When it comes out and gradually peels off, it is also supported by the reel core 3 to prevent the support 5 from being scattered or being transported together with the adhesive film 2.

In addition, the support 5 may be attached to only one side surface of the film roll 4. Then, even if the film roll body 1 only attaches the support 5 to one side of the film roll 4, it can prevent the winding deviation or the winding falling off. Moreover, compared with the case where the support 5 is attached to both sides of the adhesive film roll body 1, the amount of work for peeling the support 5 during use can be less.

Moreover, when the film roll body 1 is mounted on the connecting device, the shaft hole 3a of the reel core 3 is inserted through the rotating shaft of the connecting device. The support body 5 is preferably attached to the side surface of the film roll 4 on the open end side of the rotating shaft when the film roll body 1 is installed. Thereby, the adhesive film roll body 1 can be easily peeled off the support body 5 after being installed in the connecting device, and even when the adhesive film 2 is not peeled off, the support body 5 can be peeled off as the adhesive film 2 is rolled out. To the outer side of the connecting device, so as to prevent it from being attached to the mechanism in the connecting device or being caught in the adhesive film 2 being conveyed.

In addition, the support 5 can also be attached to one side surface and the other side surface of the film roll 4. Then, since the film roll 4 is attached to the support 5 on both sides of the film roll body 1, it is possible to more reliably prevent the winding deviation or the winding separation. In addition, since the support 5 is attached to both sides of the film roll 4, when the support 5 is rolled out without peeling off the support 5, the resistance applied to the film roll 4 due to the adhesion of the support 5 acts equally on both sides, thereby The adhesive film 2 can be rolled out stably while maintaining the balance of the winding. Furthermore, since both sides of the film roll 4 are supported, no matter which side of the film roll 4 is loaded in the load direction at the time of shipment or transportation, the packing can be carried out, so that the transportation step can be simplified.

Here, following the film roll body 1, the support 5 may be symmetrically attached to both sides of the film roll 4, or may be attached asymmetrically. For example, as shown in FIG. 9(A) and FIG. 9(B), the film roll body 1 is attached to one side 4a of the film roll 4 at 90-degree intervals across the radial direction. On film reel The other side 4b of 4 is also attached in the same way, and the support 5 attached to the two side faces 4a, 4b is attached so as to become symmetrical, that is, to become opposite. Moreover, as shown in Figure 10 (A) and Figure 10 (B), the film roll body 1 can also be attached to one side 4a of the film roll 4 with four supports 5 attached to the other side The four support bodies 5 of 4b are staggered by an arbitrary angle, for example, 45 degrees in the circumferential direction.

In addition, each support 5 on one side 4a and the other side 4b of the film roll 4 may also be attached in such a way that a part of it overlaps. As a result, the load applied to one side surface is dispersed and received on the other side surface, so that the effect of preventing winding deviation can be expected to be improved. In addition, for the same reason, the supporting bodies 5 of the one side surface 4a and the other side surface 4b of the film roll 4 may be different in shape or length except for the arrangement. In addition, as described above, each support 5 with a different shape or length can also be attached to one side 4a and the other side 4b of the film roll 4 in such a way that a part of it overlaps.

In addition, as shown in Figure 11 (A) and Figure 11 (B), with regard to the adhesive film roll body 1, when the strip-shaped support 5 is attached to both sides of the film roll 4, one piece may be long The support body 5 of the strip passes through the outermost peripheral surface of the film reel 4 and/or the shaft hole 3a of the reel core 3. Thereby, the number of supports 5 attached to both sides of the film roll 4 can be reduced, so that the amount of work for attaching and peeling can be reduced. In this case, it is also possible to provide a notch in the axial hole 3a of the film roll 4 or the reel core 3 according to the size of the support 5.

In addition, as shown in FIG. 2, it is preferable to attach the support body 5 to the film roll body 1 at least from the outermost periphery of the film roll 4 in the radial direction (the direction toward the center point of the film roll 4). The area within 80% of the length L. Furthermore, the so-called length L in the radial direction of the film roll 4 refers to the winding of the film 2 obtained by subtracting the reel core from the length from the outermost periphery of the film roll 4 to the center point of the film roll 4 The length of the part. The film reel 4 is particularly prone to winding deviation or winding loose in the area within 80% of the radial length L of the film reel 4 in the radial direction from the outermost periphery of the film reel 4 By attaching the support body 5 to this area, it is possible to effectively prevent the winding deviation or the winding separation. In addition, as long as the film roll 4 is attached to at least a part of the support 5 in an area within 80% of the radial length L of the film roll 4 in the radial direction from the outermost periphery of the film roll 4, it can prevent Winding deviation or winding loose.

In addition, the support body 5 may be attached to a specific length from the outer side edge of the reel core 3 following the film roll body 1, for example, as shown in FIG. 2 at least from the outer side edge of the reel core 3 toward the film roll 4 The area within 3cm in the radial direction. Since the film reel 4 is prone to winding deviation or winding loose in a region that is relatively close in the radial direction from the outer edge of the reel core 3, it can be expected to be effective by attaching the support 5 to this region The effect of preventing winding deviation or winding separation.

The main reasons for winding deviation or winding looseness vary according to the various conditions (width, thickness, length, viscosity of the adhesive resin layer, etc.) of the wound adhesive film 2, so it is relevant to attach the support. There is no particular contradiction in the area of 5, from the outermost periphery of the film reel 4, or from the outer edge of the reel core 3. Moreover, there is no special problem with overlapping of these areas.

[Sheet Support]

Moreover, as shown in FIG. 12(A) and FIG. 12(B), the sheet-like support body 5 can also be used for the film roll body 1 to support the side surface of the film roll 4 in a wide range. In this case, the sheet-like support 5 preferably covers more than 50% of the area of the side surface of the film roll 4. By using a sheet-like support 5 that covers the side surface of the film roll 4 in a wide range, it is possible to more effectively prevent winding deviation or winding loosening, and to reduce the number of sheets to be attached and peeled off the support 5, Thereby reducing the workload. In addition, the support 5 may be used in combination with a sheet-shaped one that covers a wide area and a sheet-shaped one that is smaller than the sheet-shaped one. The reason is that, for example, the load during transportation is very different from the load generated during use such as withdrawing. In this case, it is sufficient to peel off the unnecessary support 5 according to the situation and use it. Furthermore, the above is an example, and there is no particular restriction on the combination of different sizes.

In addition, the sheet-like support 5 having a wide area can also be used as a product label for the film roll body 1. Therefore, there is no need to attach a label separately, thereby reducing the amount of work and cost.

[Next layer]

As described above, the support 5 is attached to the side surface of the film roll 4 via an adhesive, and is suitably peeled off from the side surface of the film roll 4 when the film roll body 1 is used. As the adhesive, a known thermosetting or photocuring adhesive or adhesive material can be used. Adhesives can be pre-coated on the support 5 and dried It is dried to form an adhesive layer laminated on the support 5, or it may be formed in a paste form and applied to the support 5 immediately before attaching.

In addition, the adhesive that connects the support 5 to the film roll 4 is removed from the side of the film roll 4 together with the support 5 when the film roll 1 is used, or is attached to the film roll 4 The adhesive film 2 is rolled out in the state of 4, so the adhesive strength after curing is preferably relatively weak (for example, the peeling adhesive strength [JIS K6854] is 0.1 to 0.4 N/mm).

After the support 5 is attached to the film roll 4 via an adhesive, the adhesive is cured by heating and pressing with a thermocompression bonding tool, and is attached to the side surface of the film roll 4. When using a photocurable adhesive as the adhesive, in addition to heating and pressing with a thermocompression bonding tool, the adhesive is also cured by irradiating curing light such as UV.

As shown in FIG. 13, the adhesive layered or coated on the support 5 becomes the adhesive layer 10 formed between the layers of the adhesive film 2 wound across multiple layers between the side surface of the film roll 4. By forming the adhesive layer 10 across the layers of the adhesive film 2, the adhesive film roll body 1 can further prevent the winding deviation or the winding separation.

In addition, the adhesive layer 10 is in contact with the adhesive resin layer 22 of the adhesive film 2 exposed on the side surface of the film roll 4, so that it is expected to suppress overflow. In addition, when the support 5 is peeled from the side of the film roll 4, the adhesive layer 10 is also removed from the side of the film roll 4. That is, even if there is an overflow part of the adhesive resin that is the main cause of poor extraction such as adhesion across the layers of the adhesive film 2, it is expected to be removed together with the adhesive layer 10, so that it can be expected that it will not hinder the roll-out of the adhesive film 2 And pulled out smoothly.

[Anisotropic conductive film]

Next, as a specific example of the adhesive film 2, the anisotropic conductive film 20 will be described. FIG. 14(A) is a cross-sectional view showing a configuration example of the anisotropic conductive film 20. FIG. The anisotropic conductive film 20 includes a base film 21 as a base material, and a binder resin layer 22 laminated on the base film 21 and containing conductive particles 23. The anisotropic conductive film 20 is formed into a belt shape, and is wound around the reel core 3 so that the base film 21 becomes the outer peripheral side, thereby constituting the film roll 4.

The anisotropic conductive film 20 is formed by interposing the adhesive resin layer 22 on the bumps (electrodes) of electronic parts such as IC chips or LSI chips, flexible printed circuit boards (FPC), etc., and formed on glass substrates or insulating substrates. Between the electrodes, the electronic components are connected to the substrate, and the conductive particles 23 are clamped between the bumps of the electronic components and the electrodes formed on the substrate to make them conductive.

The adhesive composition of the adhesive resin layer 22 is composed of, for example, a common adhesive component including a film forming resin, a thermosetting resin, a latent curing agent, a silane coupling agent, and the like.

As the film-forming resin, a resin having an average molecular weight of about 10,000 to 80,000 is preferred, and various resins such as epoxy resin, modified epoxy resin, urethane resin, and phenoxy resin are particularly exemplified. Among them, from the viewpoints of the film formation state, connection reliability, and the like, a phenoxy resin is preferred.

It does not specifically limit as a thermosetting resin, For example, a commercially available epoxy resin, acrylic resin, etc. can be used.

The epoxy resin is not particularly limited, and examples thereof include naphthalene type epoxy resin, biphenyl type epoxy resin, phenol novolak type epoxy resin, bisphenol type epoxy resin, stilbene type epoxy resin, and triphenol Methane type epoxy resin, phenol aralkyl type epoxy resin, naphthol type epoxy resin, dicyclopentadiene type epoxy resin, triphenylmethane type epoxy resin, etc. These may be single or a combination of two or more types.

The acrylic resin is not particularly limited, and an acrylic compound, liquid acrylate, etc. can be appropriately selected depending on the purpose. Examples include: methyl acrylate, ethyl acrylate, isopropyl acrylate, isobutyl acrylate, ethylene glycol diacrylate, diethylene glycol diacrylate, trimethylolpropane triacrylate, dimethylol Tricyclodecane diacrylate, 1,4-butanediol tetraacrylate, 2-hydroxy-1,3-dipropenyloxypropane, 2,2-bis[4-(propenyloxymethoxy )Phenyl]propane, 2,2-bis[4-(acryloyloxyethoxy)phenyl]propane, dicyclopentenyl acrylate, tricyclodecyl acrylate, tris(propylene) isocyanurate Acetoxyethyl) ester, amine acrylate, epoxy acrylate and the like. Furthermore, it is also possible to use acrylate Those who changed to methacrylate. These may be used individually by 1 type, and may use 2 or more types together.

It does not specifically limit as a latent hardening agent, A heat hardening type hardening agent is mentioned. Latent hardeners usually do not react, and are activated by various triggers selected depending on the application, such as heat, light, and pressure, to start the reaction. The activation method of the thermally active latent hardener includes: a method of generating active species (cations, anions, The method of dissolving and dissolving with epoxy resin at high temperature to start the hardening reaction; the method of dissolving the molecular sieve-enclosed hardener at high temperature to start the hardening reaction; the method of dissolving and hardening using microcapsules. As thermally active latent hardeners, there are imidazole series, hydrazine series, boron trifluoride-amine complexes, sulfonium salts, amine imines, polyamine salts, dicyandiamine, etc., or their modifications. Substances, these may be singly or a mixture of two or more kinds. As the radical polymerization initiator, known ones can be used, and among them, organic peroxides can be preferably used.

The silane coupling agent is not particularly limited, and examples thereof include epoxy-based, amine-based, mercapto-thio-based, and urea-based systems. By adding a silane coupling agent, the adhesion between the organic material and the inorganic material is improved.

[Conductive particles]

As the conductive particles 23 contained in the binder resin layer 22, any known conductive particles used in an anisotropic conductive film can be cited. That is, as conductive particles, for example, particles of various metals or metal alloys such as nickel, iron, copper, aluminum, tin, lead, chromium, cobalt, silver, gold, and metal oxides, carbon, graphite, glass, ceramics, etc. , Plastic and other particles coated with metal on the surface, or coated with insulating film on the surface of the particles, etc. In the case of resin particles coated with metal, examples of resin particles include epoxy resins, phenol resins, acrylic resins, acrylonitrile-styrene (AS) resins, and benzoguanamine resins. , Divinylbenzene resin, styrene resin and other particles. The size of the conductive particles 23 is preferably 1-30 μm, but is not limited to this.

The adhesive composition constituting the adhesive resin layer 22 is not limited to such a film. When forming resin, thermosetting resin, latent curing agent, silane coupling agent, etc., it can also be made of any material used as the adhesive composition of the usual anisotropic conductive film.

The base film 21 supporting the adhesive resin layer 22 is, for example, PET (Poly Ethylene Terephthalate), OPP (Oriented Polypropylene), PMP (Poly-4-methylpentene-1, poly- 4-Methylpentene-1), PTFE (Polytetrafluoroethylene, polytetrafluoroethylene), etc. are coated with a release agent such as polysiloxane to prevent drying of the anisotropic conductive film 20 and maintain the anisotropic conductive film 20 shape.

The anisotropic conductive film 20 can be produced by any method, for example, it can be produced by the following method. An adhesive composition containing film forming resin, thermosetting resin, latent curing agent, silane coupling agent, conductive particles 23, etc. is prepared. The prepared adhesive composition is coated on the base film 21 by using a bar coater, a coating device, etc., and dried by an oven, etc., thereby obtaining the adhesive resin layer 22 supported by the base film 21 Anisotropic conductive film 20.

Furthermore, the anisotropic conductive film 20 is wound on the reel core 3 to form the film reel 4, and is wound out from the reel core 3 during use, and only cut to a specific length for use. In addition, the anisotropic conductive film 20 may also be a release film (not shown) in the area layer of the adhesive resin layer 22 that is not supported by the base film 21.

[Conductive particles do not touch the independent ACF]

Here, the anisotropic conductive film 20 can also be used in the case where conductive particles 23 that independently exist without contact with each other depending on the bump area or arrangement in a plan view are present everywhere. In addition, with regard to the state where the conductive particles 23 exist independently without contacting each other, the conductive particles 23 may be deliberately separated by a certain distance or more (for example, 0.5 times the diameter of the conductive particles), or they may be arranged regularly. And formed. Furthermore, the conductive particles 23 may also form a plurality of contacting or arranging units. Like a single conductive particle, the conductive particle unit is independently arranged in a non-contact manner with respect to other units. As an example of the regular arrangement of the conductive particles 23 or conductive particle units, a square lattice shape, an oblique square lattice shape, a hexagonal lattice shape, etc. can be cited, but the regular arrangement is not limited to this.

In such a situation where the conductive particles do not contact but each exist or are arranged independently, the pressing state of the conductive particles in each bump becomes easy to grasp. Therefore, by using such an anisotropic conductive film, the effect of facilitating the preparation of connection conditions (determining conditions) can be expected.

Since the conductive particles 23 exist independently without contacting each other in a plan view, compared with the case where the conductive particles 23 are randomly dispersed to form agglomerates in the anisotropic conductive film 20, the distribution of conductive particles is dense and dense. , Even between the bumps and electrodes that have been finely spaced, the probability of each conductive particle 23 being captured is increased. Therefore, when the same electronic component is anisotropically connected, the blending amount of the conductive particle 23 can be reduced . Therefore, when the conductive particles 23 are randomly dispersed, since a certain amount or more of the number of conductive particles is required, there is a concern that agglomeration or connection will occur in the interval between adjacent bumps. In an independent state in a non-contact form, it is only necessary to provide conductive particles of the required number of conduction. Therefore, the short circuit between the bumps can be suppressed, and the difference between the bumps and the substrate that does not contribute to the electronic parts can be reduced. The number of conductive particles 23 connected between the electrodes. In addition, if the number of conductive particles is reduced, the effect of cost reduction can be expected.

Such an anisotropic conductive film 20 can be manufactured, for example, by applying an adhesive on a stretchable sheet, and arranging conductive particles 23 in a single layer on the sheet, and then stretch the sheet at a desired stretching ratio. The method of transferring to the adhesive resin layer 22; the method of transferring the conductive particles 23 to the adhesive resin layer 22 supported by the base film 21 after the conductive particles 23 are neatly arranged on the substrate into a specific arrangement pattern; or A method of supplying conductive particles 23 on the adhesive resin layer 22 supported by the base film 21 through an alignment plate provided with openings corresponding to the alignment pattern. In addition, the manufacturing method of the anisotropic conductive film 20 is not specifically limited.

[Multilayer ACF]

In addition, the anisotropic conductive film of the present technology can also be set as shown in FIG. 14(B), in which an insulating adhesive layer 24 composed only of an adhesive resin layer 22 and an adhesive containing conductive particles 23 are laminated. The composition of the conductive particle-containing layer 25 formed by the resin layer 22. The anisotropic conductive film 26 shown in FIG. 14(B) is attached to the base An insulating adhesive layer 24 is laminated on the base film 21, a conductive particle-containing layer 25 is laminated on the insulating adhesive layer 24, the conductive particle-containing layer 25 side is attached to the substrate, and the IC chip is mounted from the insulating adhesive layer 24 side And other electronic parts. Furthermore, the anisotropic conductive film 26 is a release film (not shown) laminated on the conductive particle-containing layer 25.

In the anisotropic conductive film 26, for example, the lowest melt viscosity of the insulating adhesive layer 24 is lower than the lowest melt viscosity of the layer 25 containing conductive particles, etc., so that the fluidity of the insulating adhesive layer 24 is higher than that of the conductive particle-containing layer 25. The fluidity of the layer 25 of particles. Therefore, the anisotropic conductive film 26 is interposed between the substrate and the electronic components such as IC chips. When the thermal compression joint is used for heating and pressing, the insulating adhesive layer 24 with a lower melt viscosity is first filled in the substrate and the electronic components. between. Since the fluidity of the conductive particle-containing layer 25 with higher melt viscosity is lower, even when the adhesive resin layer 22 is melted between the substrate and the electronic component by heating and pressing, the conductive particles 23 can be suppressed.的流。 The flow. In addition, the insulating adhesive layer 24 filled between the substrate and the electronic component by flowing first starts the hardening reaction, and the flow of the conductive particles 23 is also suppressed. Therefore, the connection between the substrate and the electronic component can reduce the occurrence of short circuits between the bumps without the conductive particles 23 agglomerating between the adjacent bumps.

Furthermore, the anisotropic conductive film 26 may be one in which only the conductive particle-containing layer 25 is laminated. In this case, the fluidity of each conductive particle-containing layer 25 may be the same or different.

Furthermore, in the anisotropic conductive film 26, the conductive particles 23 are independently arranged in a non-contacting manner in a plan view in the layer 25 containing conductive particles, and even between the finely spaced bumps, the conductive particles 23 are arranged independently. The particle capture rate can be improved, and the occurrence of short circuits between the bumps can be reduced when the conductive particles 23 do not agglomerate between the adjacent bumps.

Furthermore, in the above embodiment, as the anisotropic conductive adhesive, an anisotropic conductive film is formed by forming a thermosetting resin composition containing conductive particles 23 in the binder resin layer 22 into a film shape. 20 and 26 have been described as examples, but the adhesive of the present technology is not limited to this, and for example, an insulating adhesive film composed of only the adhesive resin layer 22 may be used.

[Example]

Next, an embodiment of the present technology will be described. In this example, an adhesive film roll body using a flangeless reel core is prepared. The evaluation is based on the comparison between the embodiment with the support attached to the side of the film roll and the comparison example with the unattached support. The presence or absence of peeling of the adhesive film in the drop test and the occurrence rate of adhesion. In addition, as a reference example, an adhesive film roll was prepared by winding the adhesive film on a reel core with flanges, and the presence or absence of peeling of the adhesive film and the occurrence of adhesion based on the drop test were evaluated in the same way. Rate.

The conditions of the drop test were to wind 300m of the anisotropic conductive film of the examples and the comparative examples on the reel core. Then the diameter of the film roll body becomes 195 mm. After packaging this roll body in a polyethylene film, 30 rolls were stored in a carton (28×30×29 cm), and a well-known bubble cushioning material or foamed cushioning material was spread and packaged in the same manner as the transportation mode. Then, the carton was dropped from a height of 1 m, and it was confirmed whether the anisotropic conductive film had fallen off from the reel core.

In addition, the occurrence rate of adhesion was confirmed by the presence or absence of the occurrence when the adhesive film was drawn out by hand from the adhesive film rolls of the Examples and Comparative Examples. As the number of times, 50 rolls were used, and the rate of occurrence was determined based on the presence or absence of the occurrence. Even if there is one adhesion for 1 volume, it will be counted as adhesion. Practically, the generation rate of adhesion is preferably 20% or less, more preferably 15% or less, and even more preferably 10% or less.

The anisotropic conductive films of the examples and comparative examples were produced in the following manner. As the binder resin layer, 60 parts by mass of phenoxy resin (trade name: YP50, manufactured by Nippon Steel Chemical Co., Ltd.) and a radical polymerizable resin (trade name: EB-600, manufactured by Daicel-Cytec) 35 Parts by mass, 2 parts by mass of silane coupling agent (trade name: KBM-503, manufactured by Shin-Etsu Chemical Industry Co., Ltd.), and 2 parts by mass of reaction initiator (trade name: Perhexa C, manufactured by Nippon Oil & Fat Co., Ltd.) were mixed to produce an adhesive composition Things. Next, conductive particles (trade name: AUL704, manufactured by Sekisui Chemical Industry Co., Ltd.) were dispersed in the adhesive composition so that ^{the particle area density in the adhesive layer became 8000 particles/mm 2.} Then, the adhesive composition in which the conductive particles were dispersed was applied to a PET film (thickness 50 μm, base film original sheet) so as to have a thickness of 14 μm, dried, and cut to obtain. Thereby, the adhesive film of the Example and the comparative example was produced.

In addition, a PET film with a support system width of 10 mm used in each example was attached to the side surface of the film roll via a thermosetting adhesive. The adhesive used for the attachment of the support is one that removes conductive particles from the same composition as the adhesive resin of the anisotropic conductive film of the above-mentioned Examples and Comparative Examples.

[Example 1]

In Example 1, the adhesive film with a width of 1.5 mm was wound on the reel core at a distance of 300 m. In addition, four supports were attached at equal intervals on only one side of the film roll. The attachment of the support is performed by heating and pressing with a thermocompression tool under the conditions of 60° C., 1 MPa, and 1 sec. In addition, the subsequent unwinding of the film from the film roll is performed after peeling off the support. The peel strength is 0.2N/mm.

Regarding the adhesive film roll body of Example 1, even if the drop test was performed, the adhesive film did not fall off from the film roll, and the occurrence rate of blocking was 14%, which was evaluated as OK.

[Example 2]

In Example 2, the adhesive film with a width of 1.5 mm was wound on the reel core at a distance of 300 m. In addition, 4 supports were attached at equal intervals and symmetrically on both sides of the film roll. The attachment of the support is performed by heating and pressing with a thermocompression tool under the conditions of 60° C., 1 MPa, and 1 sec. In addition, the subsequent unwinding of the film from the film roll is performed after peeling off the support. The peel strength is 0.2N/mm.

Regarding the adhesive film roll body of Example 2, even if the drop test was performed, the adhesive film did not fall off from the film roll, and the occurrence rate of blocking was 10%, which was evaluated as OK.

[Example 3]

In Example 3, the adhesive film with a width of 1.5 mm was wound on the reel core at a distance of 300 m. In addition, 4 supports were attached at equal intervals and symmetrically on both sides of the film roll. The attachment of the support is performed by heating and pressing with a thermocompression tool under the conditions of 60° C., 1 MPa, and 1 sec. In addition, the subsequent unwinding of the film from the film roll was performed without peeling the support.

Regarding the adhesive film roll body of Example 3, even if the drop test was carried out, no adhesion occurred. The film fell off from the film roll, and the occurrence rate of adhesion was 0%, and the evaluation was OK.

[Example 4]

In Example 4, the adhesive film with a width of 1.5 mm was wound on the reel core at a distance of 300 m. In addition, 8 supports were attached to both sides of the film roll at equal intervals and symmetrically. The attachment of the support is performed by heating and pressing with a thermocompression tool under the conditions of 60° C., 1 MPa, and 1 sec. In addition, the subsequent unwinding of the film from the film roll is performed after peeling off the support. The peel strength is 0.2N/mm.

Regarding the adhesive film roll body of Example 4, even if the drop test was performed, the adhesive film did not fall off from the film roll, and the occurrence rate of blocking was 0%, which was evaluated as OK.

[Example 5]

In Example 5, an adhesive film with a width of 1.5 mm was wound on the reel core at a distance of 300 m. In addition, 4 supports were attached to both sides of the film roll at equal intervals and shifted by 45 degrees. The attachment of the support is performed by heating and pressing with a thermocompression tool under the conditions of 60° C., 1 MPa, and 1 sec. In addition, the subsequent unwinding of the film from the film roll is performed after peeling off the support. The peel strength is 0.2N/mm.

Regarding the adhesive film roll body of Example 5, even if the drop test was performed, the adhesive film did not fall off from the film roll, and the occurrence rate of blocking was 0%, which was evaluated as OK.

[Comparative Example 1]

In Comparative Example 1, an adhesive film with a width of 1.5 mm was wound around a reel core at 300 m. In addition, no support is attached to the side of the film roll.

Regarding the adhesive film roll body of Comparative Example 1, the adhesive film fell off from the film roll by the drop test. In addition, the occurrence rate of adhesion was 83%, which was evaluated as NG.

As shown in Table 1, it can be seen that Examples 1 to 5 in which the support is attached to the side of the film roll have the same performance as the adhesive film roll using the flanged reel core. That is, it can be seen that in Examples 1 to 5, the adhesive film does not fall off due to the drop test, and even if it is shipped and transported in the non-flange state, there is no problem in actual use.

Moreover, the generation rate of adhesion is also lower than 14%. It is believed that the reason is that when observing the side surface of the film roll after peeling the support, there is almost no foreign matter such as adhesive resin, so as the support peels off, it adheres across the layers of the adhesive film wound in multiple layers. The agent resin is removed.

On the other hand, in Comparative Example 1, since the side surface of the film roll was not fixed by the support, the adhesive film fell off from the film roll due to the drop test, making it unusable for users. In addition, the generation rate of adhesion has also become higher at 83%. The reason is that the adhesive resin overflowing due to the tight winding adheres and hardens across the layers of the adhesive film wound across multiple layers.

In addition, for the adhesive film rolls of Examples 1 to 5, the winding length of the adhesive film was changed from 300m to 50m, and the other conditions were set to the same adhesive film roll samples, and the calculation was based on the drop in the same way. In the test, the presence or absence of adhesion and the adhesion generation rate obtained the same results as those of Examples 1 to 5, and it was found that there was no practical problem.

In addition, for the adhesive film rolls of Examples 3 to 5, the width of the adhesive film is changed from 1.5mm Changed to 0.8mm, and other conditions were set to the same adhesive film roll sample (Examples 3'to 5'), and the presence or absence of shedding based on the drop test and the adhesion generation rate were calculated in the same way as in Example 3. ~5 Similarly, no peeling based on the drop test occurred, and the adhesion generation rate also obtained the results of 20% in Example 3', 15% in Example 4', and 0% in Example 5', which shows that it is practical There is no problem.

Claims (16)

An adhesive film roll is composed of a reel core and an adhesive film wound around the reel core, and a support is attached to the side of the film roll formed by winding the adhesive film through an adhesive, the support The body is in the shape of a belt or yarn, and one or more of the above-mentioned supports are attached across the radial direction of the film roll, or one or more of the above-mentioned supports are attached radially on the side of the film roll, And when the above-mentioned adhesive film roll body is used, it is suitably peeled off from the side surface of the film roll. Such as the adhesive film roll body of the first item of the scope of patent application, wherein the support system is attached across one side and the other side of the film roll through the hole on the upper side and/or core of the film roll. For example, the adhesive film roll body of item 1 or 2 of the scope of patent application, wherein a support body is attached asymmetrically on both sides of the film roll formed by winding the adhesive film. For example, the adhesive film roll of item 1 or 2 of the scope of patent application, wherein the above-mentioned support is a flexible metal plate. For example, the adhesive film roll body of item 1 or 2 of the scope of patent application, wherein the above-mentioned support is a paper sheet that is given flexibility. For example, the adhesive film roll body of item 1 or 2 of the scope of patent application, wherein the above-mentioned support body is also attached to the above-mentioned reel core. For example, the adhesive film roll body of item 1 or 2 of the scope of patent application, wherein the support body is attached to one side of the film roll. For example, the adhesive film roll body of item 1 or 2 of the scope of patent application, wherein the support body is attached to one side and the other side of the film roll. For example, the adhesive film roll body of item 1 or 2 of the scope of patent application, wherein the support body is attached to at least an area within 3 cm in the radial direction of the film roll from the outer side edge of the reel core. For example, the adhesive film roll body of item 1 or 2 of the scope of patent application, wherein the above-mentioned support body It is attached to at least an area within 80% of the radial length of the film reel from the upper edge of the film reel toward the radial direction of the film reel. Such as the adhesive film roll of item 1 or 2 in the scope of patent application, wherein the film roll is attached to the support body and the adhesive layer is formed across the layers of the adhesive film. For example, the adhesive film roll of item 11 in the scope of patent application, wherein the adhesive strength of the above-mentioned adhesive layer after curing is 0.1~0.4N/mm in [JIS K6854]. For example, the adhesive film roll of item 1 or 2 of the scope of patent application, wherein an adhesive layer is provided on the support, and the adhesive layer and the adhesive system of the adhesive film have the same composition. A method for manufacturing an adhesive film roll body, which has the following steps: a step of winding an adhesive film on a reel core; and on the side of a film roll constituted by the adhesive film wound on the reel core The step of attaching the support through the adhesive, the support is in the shape of a ribbon or yarn, and one or more of the supports are attached across the radial direction of the film roll, or radiated on the side of the film roll One or more of the above-mentioned supports are attached to the shape, and are suitably peeled off from the side of the film roll when the above-mentioned adhesive film roll is used. For example, the method for manufacturing an adhesive film roll according to claim 14, wherein the support system is attached to the side surface of the film roll by thermally curing or light curing the adhesive. For example, the manufacturing method of the adhesive film roll body of the 14th or 15th patent application, wherein the attachment position of the film roll on the support body is spread over the interlayer of the adhesive film to form an adhesive layer.

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