KR20060043652A - A lamination method of a metal laminating film and a heat roll for laminating a metallic foil - Google Patents

Abstract

The present invention uses a base film with an adhesive coated with an adhesive on the surface of a base film as a product, and simultaneously attaches a metal foil to the center of the surface, the adhesive on both ends of the base film is transferred to the surface of the heat roll. Provided are a method of laminating a metal laminated film without a problem of causing a defect, and a heat roll used to laminate this metal foil.

The present invention inserts an insulating film (2) with an adhesive applied to the entire upper surface in advance between the nip roll (10) and the heat roll (30) together with the metal foil (6) in the width direction of the insulating film (2). In laminating the metal foil 6 in the substantially central portion, the outer circumferential surface of the nip roll 10 and the outer circumferential surface of the heat roll 30 are press-contacted only in the center region of the heat roll 30.

Metal lamination film, insulating film, laminate, heat roll, nip roll, metal foil, polyimide

Description

FIELD OF THE METAL LAMINATING FILM AND A HEAT ROLL FOR LAMINATING A METALLIC FOIL}

1 is a schematic view showing a method of laminating a metal laminate film according to an embodiment of the present invention.

It is a schematic diagram at the time of laminating metal foil with the heat roll shown in FIG.

Figure 3 is a schematic diagram showing a method of laminating a metal laminate film according to another embodiment of the present invention.

It is a top view which shows the process at the time of forming an insulating film by the center coating system conventionally performed.

5 is a schematic view of laminating a metal foil on a base film with an adhesive formed by a center coating method.

It is a schematic diagram at the time of laminating a metal foil to the base film with an adhesive formed by the front-coating system employ | adopted for the metal lamination method of this invention.

7 is a process chart when forming an insulating film of a front coating method.

[Description of the code]

2: insulating film (base film) 4: adhesive 6: metal foil

8: Heat roll 10: Nip roll 14: Slit 18: Sprocket hole

30: heat roll 32: heat roll body 34: ring 36: tension roll

38: endless belt 40: spring

 The present invention relates to a method for laminating a metal laminated film using an insulating film coated with an adhesive on an entire upper surface as a material, and a heat roll used for laminating a metal foil.

With the development of the electronics industry, the demand for printed circuit boards for mounting electronic components such as ICs (Integrated Circuits) and LSIs (large scale integrated circuits) is rapidly increasing. However, miniaturization, light weight, and high functionality of electronic devices are required. As a mounting method of, the mounting method using the film carrier tape for mounting electronic components, such as a TAB tape, a T-BGA tape, and an ASIC tape, is employ | adopted in recent years. In particular, the importance is increasing in the electronic industry using a liquid crystal display (LCD), which requires high definition, thinning, and narrowing the edge area of a liquid crystal screen, such as a personal computer.

Moreover, in what is called three-layer TAB tape which stuck an adhesive agent to base films, such as polyimide, and adhered copper foil on it, cost is high in the process until the base film with an adhesive agent is made. Such an adhesive base film also reaches a limit of cost down only by improving the productivity of the maker, and requires fundamental measures.

Here, in the conventional method of forming a base film with an adhesive, an adhesive is first coated on a release film (PET), then slits are formed at predetermined intervals, and a narrow release film is made of polyimide or the like. The adhesive 4 was transferred to the central region of the insulating film 2 by attaching it to the central region of the insulating film (base film) and peeling off the protective film of the substrate therein. . That is, the conventional adhesive coating method, referred to as the center coating method, both ends of the adhesive 4 is transferred to the central region of the base film 2 required for bonding the metal foil, and the sprocket hole 18 or the like. The adhesive 4 was not apply | coated to this. In the center region of the insulating film (base film) 2 with adhesive formed by such a center coating method, conductive metal foil 6 such as copper foil is laminated (thermally pressed) in a subsequent step.

As shown in FIG. 5, in order to thermo-compress the metal foil 6 to the surface of the insulating film 2, an adhesive 4 is formed at the center of the upper surface between the heat roll 8 and the nip roll 10. It was performed by inserting the apply | coated insulating film 2 with the metal foil 6. In that case, the width | variety of the metal foil 6 and the width | variety of the adhesive agent 4 are substantially the same in the center coating system.

In the conventional method employing such a center coating method, when the adhesive 4 is applied to the upper surface of the base film 2, the adhesive 4 is adapted to the position of the metal foil 6 adhered to the base film 2. It was necessary to determine the application position of beforehand exactly.

Therefore, since the insulating film 2 with an adhesive manufactured by such a method requires many air-conditioning and alignment, it became a cause for not only a lot of goods but also a big increase in manufacturing cost.

Therefore, in recent years, the whole surface coating method which applies the adhesive agent 4 to the whole surface of the base film 2 instead of the center coating system mentioned above is also employ | adopted (for example, Unexamined-Japanese-Patent No. 6-104317). ).

As shown in FIG. 6, this front coating method is a method in which the adhesive agent 4 is applied to the entire surface with the same width as the base film 2 made of polyimide or the like, and the metal foil 6 is laminated thereon.

However, if such a front coating method is employed, when the metal foil 6 is inserted between the heat roll 8 and the nip roll 10 together with the metal foil 6 to be thermocompression-bonded, the adhesive 4 at both ends from the width of the metal foil 6 may be used. Since the adhesive is pushed out, there is a problem that the adhesive thus pushed out is pressed between the heat roll 8 and the nip roll 10 so that the adhesive is transferred to the surface of the heat roll 8. Moreover, once the adhesive agent 4 was transferred to the surface of the heat roll 8, this transferred adhesive agent 4 was transferred to a product this time, and there existed a problem which a defect generate | occur | produced and a yield falls.

In addition, various methods have been proposed as a method for coating the entire surface of the adhesive 4 to the base film 2. 7 shows an example of total coating of the adhesive 4.

That is, as shown in Fig. 7 (A), the method coats and dries the adhesive 4 on the surface of the base film 2 made of polyimide, and then winds it up in the form of a roll. As shown in B), in the polyimide film 2 with an adhesive agent, the slit 14 is formed in 35 mm space | interval, for example, and it divides into several.

According to such a method, as is conventionally performed, the process of FIG. 7 (C) which center-laminates the adhesive agent 4 to the base film 2 which consists of polyimide divided into many is not required, and FIG. As shown in 7 (D), the front-coated 35 mm wide product 16 (adhesive base film 2) can be obtained.

In this way, a product 16 having a front surface coated with the adhesive agent 4 is obtained. Using this product 16, as shown in FIG. 6, a metal foil between the heat roll 8 and the nip pole 10 is obtained. When thermocompression bonding (6) is carried out, the adhesive agent 4 of the base film 2 protruded from the metal foil 6 to both ends of the heat roll 8 is transferred.

In view of such a conventional problem, the present invention uses a base film with an adhesive coated with an adhesive on the surface of a base film as a product, and at the same time, when attaching a metal foil to the center of the surface, the adhesive at both ends of the base film is heated. It is an object of the present invention to provide a method for laminating a metal laminated film that is transferred to the surface of a roll and does not cause product defects, and a heat roll used for laminating the metal foil.

The present invention has been invented in order to achieve the problems and objects in the prior art as described above, the method of laminating a metal laminate film according to the present invention,

In laminating the metal foil at the center part substantially in the width direction of the said insulating film by inserting the insulating film in which the adhesive agent was previously apply | coated to the whole upper surface between the nip roll and the heat roll press-bonded to this nip roll,

The height of the center region of the outer circumferential surface of the heat roll is set higher than the height of both ends thereof, and the outer circumferential surface of the nip roll and the outer circumferential surface of the heat roll are set to be press-contacted only in the center region of the heat roll.

According to this invention by such a method, since a heat roll contacts the outer peripheral surface of a nip roll only in a center area | region, the adhesive agent of both ends is not transferred to a heat roll.

In addition, the present invention is to insert an insulating film coated with an adhesive on the entire upper surface between the nip roll and the heat roll pressed against the nip roll together with the metal foil to laminate the metal foil in a substantially central portion in the width direction of the insulating film. In

On the outer circumferential surface of the heat roll, a film having a large peelability to the mating member is formed by surface treatment,

The said metal foil is inserted between the heat roll in which the said peelable film | membrane was formed, and the said nip roll, and the said metal foil is laminated on the adhesive bond layer of the said insulating film, It is characterized by the above-mentioned.

According to this method, since an adhesive agent is crimped | bonded with the nip roll through the peelable film formed in the outer peripheral surface of a heat roll, the said adhesive agent is not transferred to a heat roll.

In addition, the present invention is to insert an insulating film, which is previously coated with an adhesive on the entire upper surface, between the nip roll and the heat roll press-bonded to the nip roll together with the metal foil to laminate the metal foil at approximately the center in the width direction of the insulating film. In

An endless belt is mounted on an outer circumferential surface of the heat roll with a tension roller disposed in the vicinity, and the metal foil and the adhesive layer of the insulating film are press-contacted through the endless belt. .

According to this method, the endless belt is wound on the endless belt wound around the circumferential surface of the heat roll, and the belt is replaced, if necessary, even when the adhesive is transferred to the belt. You can cope only with replacement work.

Moreover, the heat roll used for laminating the metal foil which concerns on this invention is a heat roll for laminating metal foil in the substantially center part of the insulating film in which the adhesive agent was previously apply | coated to the whole upper surface,

The height of the center region of the heat roll is set higher than the height of both ends of the heat roll, and is set to press-contact the outer circumferential surface of the nip roll and the outer circumferential surface of the heat roll only in the central region.

According to such a heat roll, since the contact with a nip roll comes in contact with the width | variety of a metal foil, the adhesive of both ends is not crimped | bonded. Therefore, the adhesive of both ends can be prevented from being transferred to the heat roll side.

Moreover, in the heat roll which concerns on this invention, since the both ends of the said heat roll are cut off, the center area | region of the said heat roll may be formed high compared with both ends.

Thus, even if both ends are formed low, the effect similar to the above can be exhibited.

Moreover, in this invention, the said center roll may be set high compared with the both ends by the ring formed separately previously in the said center area | region by the one-piece system.

According to such a structure, since a ring needs to be formed separately previously, not only workability is favorable but waste of cost by a work mistake etc. can be prevented like the case of cutting a heat roll.

Here, the ring is preferably made of metal.

The ring may also be made of resin.

In this way, when the ring is formed of a metal or resin, it is also possible to appropriately select a material in accordance with the intended use.

Preferred Mode for Carrying Out the Invention

EMBODIMENT OF THE INVENTION Hereinafter, embodiment (example) of this invention is described, referring drawings.

FIG. 1 is a perspective view of a heat roll 30 used in one embodiment of the present invention, the heat roll being pressed against the nip roll 10, for example, as shown in FIG. 6 or FIG. 2 described above. Used as a state. In this embodiment, as in the case of FIG. 6, the insulating film 2 having the adhesive 4 entirely coated on the surface thereof is used.

The heat roll 30 is fitted with a narrow ring 34 formed of stainless steel or the like in the center of a generally columnar heat roll main body 32 that is chrome plated with stainless steel, for example. The width T of this ring 34 is set substantially the same as the width of the adhesive agent 4. Such a heat roll main body 32 and the ring 34 are fitted so that they cannot be moved by the difference of thermal expansion at the time of a heat roll heating.

When the heat roll 30 formed in this way is used instead of the heat roll 8 shown in FIG. 6, as shown in FIG. 2, the adhesive agent 4 of the both ends exposed from the metal foil 6 is heat-roll 30 Since it is not in contact with the circumferential surface of), the adhesive agent 4 is not transferred to the surface of the heat roll body 32. Therefore, the heat roll 30 can be used in a clean state for a long time, and a product of good quality can be manufactured.

As mentioned above, although the heat roll 30 which concerns on one Embodiment of this invention, and the lamination method of the metal laminated film using this heat roll was demonstrated, this invention is not limited to the said Example.

For example, in the above embodiment, the height of the center region is set high and the height of both ends is set low by inserting the ring 34 into the heat roll body 32. Alternatively, the center portion is cut by, for example, cutting both ends. It can also be set high.

3, a belt formed separately can also be used.

That is, the tension roll 36 is provided in the vicinity of the heat roll 30, the endless belt 38 is provided between the heat roll 30 and the tension roll 36, and the tension roll 36 is attached. It is also possible to set the endless belt 38 to always be tensioned by suitable biasing means such as the LM guide 39, the spring 40, etc. mounted on the fixing part.

Since the metal foil 6 inserted between the nip roll 10 by this setting is crimped | bonded between the endless belt 38 and the nip roll 10, even if the adhesive agent 4 is removed from the metal foil 6, Even if it is pushed out, the adhesive agent 4 is not transferred to the powder part of the heat roll 30, but is transferred to the surface of the joint belt 38. As shown in FIG. Therefore, if a release treatment is performed on the surface of the endless belt 38, or if it is formed of Teflon (trade name) or the like so that the adhesive does not adhere, the adhesion of the adhesive to the surface of the belt 38 can be prevented as much as possible. Can be.

When the endless belt 38 has a long service life, the endless belt 38 may be replaced. Such a method can also prevent the adhesive from adhering to the product and lowering the yield. Each heat roll can also be provided at a low price.

As described above, in the present invention, by adopting such a heat roll, it is possible to prevent the front-coated adhesive from adhering to the circumferential surface of the heat roll. Moreover, the structure is low cost and excellent in maintenance.

In the above embodiment, the method of forming the central convex portion with the ring 34 or the like on the heat roll and the method of winding the endless belt 38 have been described, but instead of such a method, for example, the heat roll 30 It is also possible to form a high release film on the outer circumferential surface of the). In forming such a film, for example, electroless nickel and Teflon (trade name) can be precipitated together in a treatment liquid, and heat-treated after formation of the film, whereby Teflon particles (PTFE) can be dispersed on the outer circumferential surface of the heat roll.

In the case of the heat roll surface-treated in this way, the adhesive agent 4 can be prevented from adhering to the outer peripheral surface.

 According to the present invention, in the case of using a base film with an adhesive coated on the surface of the base film as a product and attaching a metal foil to the center of the surface, the adhesives at both ends of the base film are transferred to the surface of the heat roll. Therefore, it is possible to laminate a metal laminated film that does not cause product defects.

Claims (8)

The insulating film, which is pre-coated with an adhesive on the entire upper surface, is inserted between the nip roll and the heat roll pressed against the nip roll together with the metal foil. In laminating a metal foil at a substantially center portion in the width direction, The height of the center region of the outer circumferential surface of the heat roll is set higher than the height of both ends thereof, and the outer circumferential surface of the nip roll and the outer circumferential surface of the heat roll are set to be press-contacted only in the center region of the heat roll. Lamination method of metal laminated film.  In laminating the metal foil at the center part substantially in the width direction of the said insulating film by inserting the insulating film in which the adhesive agent was previously apply | coated to the whole upper surface between a nip roll and the heat roll pressed against this nip roll, On the outer circumferential surface of the heat roll, a film having a large peelability to the mating member is formed by surface treatment, The metal foil is inserted between the heat roll and the nip roll on which the peelable large film is formed, and the metal foil is laminated on the adhesive layer of the insulating film. Lamination method of metal laminated film. In laminating the metal foil at the center part substantially in the width direction of the said insulating film by inserting the insulating film in which the adhesive agent was previously apply | coated to the whole upper surface between a nip roll and the heat roll pressed against this nip roll, An endless belt is mounted on the outer circumferential surface of the heat roll with a tension roller disposed in the vicinity, and the metal foil and the adhesive layer of the insulating film are press-contacted through the endless belt. Characterized by Lamination method of metal laminated film. As a heat roll for laminating metal foil in the substantially center part of the insulating film in which the adhesive agent was previously apply | coated to the whole upper surface, The height of the center region of the heat roll is set higher than the height of both ends of the heat roll, and the outer circumferential surface of the nip roll and the outer circumferential surface of the heat roll are set in pressure contact only in the center region. Heat rolls used to laminate metal foil. The method of claim 4, wherein The both ends of the heat roll are cut so that the center region of the heat roll is formed higher than both ends, and the heat roll used for laminating metal foil. The method of claim 4, wherein The heat roll is used to laminate metal foil, characterized in that the central region is set higher than both ends by a ring previously formed separately in the central region being integrally fitted. The method of claim 6, And the ring is made of metal, characterized in that the heat roll used to laminate the metal foil. The method of claim 6, A heat roll used for laminating metal foil, wherein the ring is made of resin.

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