JPH0664128A - Roll for laminating metal foil - Google Patents

Abstract

PURPOSE:To provide a roll for applying a metal foil to an insulated base without forming creases or the like on the metal foil even if the width of the insulated base or that of the metal foil gets larger by a simple constitution. CONSTITUTION:A relief section 13 for a soft roll 12 is formed in the vicinity of both end edges of the soft roll 12 or corresponding sections of a hard roll 11 on the opposite side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll for sticking a metal foil onto an insulating base material which is a material for a substrate for mounting electronic parts.

[0002]

2. Description of the Related Art Various materials have been conventionally used as materials for forming electronic component mounting substrates. Among them, various processing can be continuously performed by a so-called reel-to-reel method. Therefore, a long and flexible insulating base material has been adopted. A long metal foil (often a copper foil) to be a conductor circuit or the like is continuously attached to the long and flexible insulating base material.

As shown in FIG. 3, the operation of attaching the metal foil 31 is carried out between the metal foil 31 and the silicon rubber roll 22 between a pair of rolls, the metal foil 31 and the insulating base material 3.
It is generally done by passing 0. The silicon rubber roll 22 is softer than the metal roll 21.
Also, the metal foil 31 is pressure-bonded to the metal roll 21 side so that a defective portion such as a wrinkle does not occur in the adhered metal foil 31. Then, the conventional roll used in such a case is usually a completely cylindrical shape as shown in FIG.

However, such a perfectly cylindrical metal roll 21 and silicon rubber roll 22 have no problem when the insulating base material 30 and the metal foil 31 are relatively narrow in width. Continuous electronic component mounting board
These insulating base materials 30 and metal foils 3 are used for mass production.
When the width of No. 1 is widened, the metal roll 21 and the silicone rubber roll 22 are completely cylindrical as shown in FIG.
Then, the following problems came to occur. That is, when the widths of the metal roll 21 and the silicon rubber roll 22 are widened in accordance with the insulating base material 30 and the like, the two rolls rotate at a high speed, and the rotation axes of the two are not perfectly parallel. As a result, it becomes difficult to bring the metal roll 21 and the silicon rubber roll 22 into close contact with each other with a uniform force in all parts, and the following problems are caused.

That is, the insulating base material 30 itself is a flexible material that is easily deformable, and when it receives a tensile force by the reel-to-reel method or a direct and non-uniform force from the silicone rubber roll 22 or the like. Is transformed into a subtle way. Of course, the metal foil 31 which is more flexible than the insulating base material 30 naturally deforms. As a result, the positional accuracy of the various preliminarily formed holes in the insulating base material 30 for positioning and the like deteriorates, and the metal foil 31 to be adhered also has defects such as wrinkles. Once the metal foil 31 has wrinkles, the metal foil 31 is sandwiched by the metal roll 21 and the silicon rubber roll 22, so that the wrinkles are not immediately scraped off. In some cases, the metal foil 31 is damaged or cut. And so on.

Therefore, the present inventors have completed the present invention as a result of various studies on how to solve the above problems when the width of the roll is increased.

[0007]

The present invention has been made based on the above-described background, and the problem to be solved is to provide an insulating base material 30 and a metal foil 31 to be attached thereto.
Wrinkles and damage to the metal foil 31 that occur when the width of the metal foil 31 increases.

The object of the present invention is to securely attach the insulating base material 30 and the metal foil 31 to the insulating base material 30 without causing wrinkles and the like even if the width of the insulating base material 30 and the metal foil 31 is increased. It is to provide a roll 10 that can be worn by a simple structure.

[0009]

Means for Solving the Problems In order to solve the above problems, the means adopted by the present invention is that "a hard roll 11 and a soft roll 12 are opposed to each other, and an insulating substrate 30 is provided between them. In the roll 10 for sticking the metal foil 31 to the insulating base material 30 by passing it through the metal foil 31,
The roll 10 "for metal foil lamination is characterized in that a relief portion 13 for the soft roll 12 is formed at both end edges of the soft roll 12 or in the vicinity of corresponding portions of the hard roll 11 opposed thereto.

[0010]

The roll 1 of the present invention constructed as described above.
The effect of 0 will be described below. This description is for the case where the relief portion 13 is formed on the hard roll 11 side and the case where the soft roll 12 is formed.
If it is formed on the side, it is divided. -When the relief portion 13 is formed on the hard roll 11 side Since the relief portion 13 is formed on the portions of the hard roll 11 corresponding to both ends of the soft roll 12, when the shafts of both are inclined. Since the end portion of the soft roll 12 enters the relief portion 13 on the hard roll 11 side, it is almost impossible to apply a non-uniform force to the insulating base material 30 and the metal foil 31 corresponding to this portion. Disappear. That is, soft roll 1
When 2 comes into contact with the hard roll 11 in a non-uniform manner, the force received by the end of the soft roll 12 becomes non-uniform, but the end on the side receiving the large force is hard roll 11 Since it enters into the side relief portion 13, as a result, the force applied to the hard roll 11 via the soft roll 12 becomes uniform.

In other words, when a part of the soft roll 12 enters into the escape portion 13 on the hard roll 11 side,
Soft roll 12 pressed against hard roll 11
Reaction from the hard roll 11 of the soft roll 12
The contact surfaces are evened out, and as a result, non-uniform force is not applied to the insulating base material 30 and the metal foil 31. For this reason, wrinkles and the like do not occur on the metal foil 31. When the relief portion 13 is formed on the soft roll 12 side In this case, since the relief portion 13 is formed at both ends of the soft roll 12, the axis of the soft roll 12 is inclined with respect to that of the hard roll 11. In this case, the end of the soft roll 12 bends accordingly. Since this flexure is absorbed by the escape portion 13 formed at the end of the soft roll 12, when viewed at the contact surface of the soft roll 12,
The pressure contact force is even.

[0012]

Next, the present invention will be described in detail according to each embodiment shown in the drawings. Roll 10 according to any embodiment
Also, a long metal foil 31 is used for the long insulating base material 30.
It is for sticking (actually copper foil). Example 1 FIG. 1 shows a roll 10 according to Example 1 of the present invention, (a) of FIG. 1 is a side view, and (b) of FIG. 1 is a front view. That is, the roll 10 is composed of a fixed hard roll 11 and a soft roll 12 pressed against the fixed hard roll 11, and as shown in FIG. 3, between the hard roll 11 and the soft roll 12. Insulating base material 30
Also, the metal foil 31 is sandwiched and, for example, the hard roll 11 is rotationally driven to convey the metal foil 31 while pressure-bonding it to the insulating base material 30.

The hard roll 11 is, for example, made of a metal such as hard chrome plating on the surface of the material S45C, and has a width of about 40 mm and a depth of about 0 at portions corresponding to both end edges of the soft roll 12. A groove of 0.2 mm, that is, a relief portion 13 is formed. Since the hard roll 11 presses and conveys the insulating base material 30 described above, the width shown in (b) of FIG. 1 is about 2
The diameter is 70 mm or more, and the diameter shown in FIG. 1A is about 105 mm or more.

In this embodiment, the soft roll 12 is made of silicon rubber, and has a width of about 200 mm, which is smaller than that of the hard roll 11, and a diameter of about 100 mm. This soft roll 1
2 has a completely cylindrical shape, unlike the case of the embodiment described below. Example 2 FIG. 2 shows a roll 10 according to Example 2 of the present invention, and the hard roll 11 constituting this roll 10 has the same material and size as those in Example 1 described above. It has been formed, and is formed as a completely cylindrical shape. On the other hand, the soft roll 12 pressed against the soft roll 12 is also formed of the same material and size as that of the first embodiment, but chamfered on both side end portions,
That is, the escape portions 13 are formed respectively. In the case of the embodiment shown in FIG. 2, the relief portion 13 is an inclined surface, but it may be formed by forming it into a curved shape.

[0015]

As described in detail above, in the present invention, as illustrated in each of the above-mentioned embodiments, "the both end edges of the soft roll 12,
Or, the relief portion 13 for the soft roll 12 is formed in the vicinity of the corresponding portion of the hard roll 11 that faces it. " It is possible to provide the roll 10 having a simple structure, which can securely adhere the metal foil 31 to the insulating base material 30 without causing wrinkles or the like even if the size becomes large.

[Brief description of drawings]

FIG. 1 is a front view and a side view of a roll according to a first embodiment of the invention.

FIG. 2 is a front view and a side view of a roll according to a second embodiment of the invention.

FIG. 3 is a cross-sectional view showing a state in which a metal foil is attached to an insulating base material using the roll.

FIG. 4 is a front view and a side view showing a conventional roll.

[Explanation of symbols]

 10 rolls 11 hard rolls 12 soft rolls 13 escape parts

Claims (1)

[Claims] 1. A roll comprising a hard roll and a soft roll which are opposed to each other, and an insulating base material and a metal foil are passed between them to bond the metal foil to the insulating base material. A roll for metal foil lamination, characterized in that an escape portion for the soft roll is formed at both edges of the roll, or in the vicinity of the corresponding portion of the hard roll opposed thereto.