JP3111231B2 - Rolls for laminating metal foil - Google Patents

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 on an insulating substrate to be used as a material for a substrate for mounting electronic components.

[0002]

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

As shown in FIG. 3, the metal foil 31 is attached to a pair of rolls, a metal roll 21 and a silicon rubber roll 22, together with the metal foil 31 and the insulating base material 3.
This is generally performed by passing 0 through. The silicon rubber roll 22 is softer than the metal roll 21, and the silicone rubber roll 22 is
In addition, the metal foil 31 is pressed against the metal roll 21 so as to prevent a defective portion such as a wrinkle from occurring in the adhered metal foil 31. The conventional roll used in such a case is usually a perfect cylinder as shown in FIG.

However, such a completely cylindrical metal roll 21 and silicon rubber roll 22 have no problem when the widths of the insulating base material 30 and the metal foil 31 are relatively small. Continuous mounting of electronic component mounting boards
For mass production, these insulating base material 30 and metal foil 3
1, the width of the metal roll 21 and the silicon rubber roll 22 are completely cylindrical as shown in FIG.
Then, the following problems began to arise. That is, when the widths of the metal roll 21 and the silicon rubber roll 22 are increased according to the width of the insulating base material 30 or the like, mechanical rotations of the two rolls and rotation axes of the two rolls are not completely parallel. As a result, it is 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 portions, and the following problem has arisen.

That is, the insulating base material 30 itself is flexible and easily deformable, and is subjected to a tensile force by a reel-to-reel method or a direct and uneven force from the silicon rubber roll 22 or the like. Will be deformed symbolically. Of course, the metal foil 31 which is more flexible than the insulating substrate 30 is naturally deformed. For this reason, the positional accuracy of the various holes for positioning and the like formed in advance on the insulating base material 30 is deteriorated, and the metal foil 31 to be adhered also has defects such as wrinkles. Once the metal foil 31 has a wrinkle, the metal foil 31 is sandwiched between the metal roll 21 and the silicon rubber roll 22, so that the wrinkle is not immediately lost. In some cases, the metal foil 31 may be damaged or cut. And so on.

The inventors of the present invention have conducted various studies on how to solve the above-mentioned problem when the width of the roll is increased, and as a result, completed the present invention.

[0007]

SUMMARY OF THE INVENTION The present invention has been made based on the above background, and the problem to be solved is to solve the problem of the insulating base material 30 and the metal foil 31 to be attached thereto.
The wrinkles and damage of the metal foil 31 caused when the width of the metal foil 31 becomes large.

[0008] The object of the present invention is that even if the width of the insulating base material 30 or the metal foil 31 becomes large, the metal foil 31 is securely attached to the insulating base material 30 without causing wrinkles or the like. An object of the present invention is to provide a roll 10 that can be worn by a simple configuration.

[0009]

Means for Solving the Problems To solve the above-mentioned problems, a means adopted by the present invention is "a hard roll 11 and a soft roll 12 facing each other, and an insulating base material 30 and By passing through the metal foil 31, in the roll 10 for attaching the metal foil 31 to the insulating base material 30,
A roll 10 for metal foil lamination, characterized in that relief portions 13 for the soft roll 12 are formed near both ends of the soft roll 12 or near corresponding portions of the hard roll 11 facing the soft roll 12.

[0010]

The roll 1 of the present invention constructed as described above.
The operation of the soft roll 12 will be described below.
It is performed separately when it is formed on the side. -When the relief portion 13 is formed on the hard roll 11 side Since the relief portion 13 is formed in the portion of the hard roll 11 corresponding to both ends of the soft roll 12, when both shafts are inclined. Since the end of the soft roll 12 enters the escape portion 13 on the side of the hard roll 11, uneven force is hardly applied to the insulating base material 30 and the metal foil 31 corresponding to this end. Disappears. That is, the soft roll 1
2 comes into contact with the hard roll 11 in a non-uniform state, the force applied to the end of the soft roll 12 becomes non-uniform. As a result, the force applied to the inside of the hard roll 11 via the soft roll 12 becomes uniform.

In other words, when a part of the soft roll 12 enters the escape portion 13 on the hard roll 11 side,
Soft roll 12 pressed against hard roll 11
The reaction received from the hard roll 11 is the soft roll 12
Therefore, the nonuniform force is not applied to the insulating base material 30 or the metal foil 31 as a result. For this reason, the generation of wrinkles and the like on the metal foil 31 is eliminated. In the case where the relief portion 13 is formed on the soft roll 12 side In this case, since the relief portions 13 are 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 bending is absorbed by the relief portion 13 formed at the end of the soft roll 12, when viewed at the contact surface of the soft roll 12,
The pressing force becomes even.

[0012]

Next, the present invention will be described in detail with reference to the embodiments shown in the drawings. Roll 10 according to any embodiment
Also, with respect to the long insulating base material 30, the long metal foil 31
(Actually a copper foil). Example 1 FIG. 1 shows a roll 10 according to Example 1 of the present invention. FIG. 1 (A) shows a side view and FIG. 1 (B) shows a front view. That is, the roll 10 is composed of a fixed hard roll 11 and a soft roll 12 pressed against the same, and as shown in FIG. Insulating base material 30
The metal foil 31 is conveyed while being pressed against the insulating base material 30 by, for example, rotating the hard roll 11 while holding the metal foil 31 therebetween.

The hard roll 11 is formed, for example, by forming a metal such as hard chrome plating on the surface of a material S45C, and a portion corresponding to both ends of the soft roll 12 has a width of about 40 mm and a depth of about 0 mm. .2 mm grooves, that is, relief portions 13 are respectively formed. Since the hard roll 11 is used to press and transport the above-described insulating base material 30 and the like, the width shown in FIG.
The diameter is 70 mm or more, and the diameter shown in FIG. 1A is about 105 mm or more.

In the present embodiment, the soft roll 12 is formed 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
Numeral 2 is a completely cylindrical shape unlike the embodiment shown below. Second Embodiment FIG. 2 shows a roll 10 according to a second embodiment of the present invention. The hard roll 11 constituting the roll 10 has the same material and size as those in the first embodiment described above. It is formed as a completely cylindrical shape. On the other hand, the soft roll 12 pressed against the soft roll 12 is also formed as the same material and size as that of the first embodiment.
That is, the escape portions 13 are respectively formed. Although the relief portion 13 is an inclined surface in the case of the embodiment shown in FIG. 2, it may be formed by making it a curved surface.

[0015]

As described in detail above, in the present invention, as illustrated in the above embodiments, "the both edges of the soft roll 12;
Alternatively, a relief portion 13 for the soft roll 12 is formed in the vicinity of the corresponding portion of the hard roll 11 opposed thereto. " The roll 10 can be provided with a simple configuration that can securely attach the metal foil 31 to the insulating base material 30 without causing wrinkles or the like even if the roll becomes large.

[Brief description of the drawings]

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

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Roll 11 Hard roll 12 Soft roll 13 Escape part

Claims (1)

(57) [Claims] 1. A roll which comprises a hard roll and a soft roll opposed to each other, and passes an insulating base material and a metal foil between them, whereby the metal foil is adhered to the insulating base material. A roll for laminating a metal foil, wherein relief portions for the soft roll are formed near both end edges of the roll or near corresponding portions of the hard roll facing the roll.