JP2000334836A - Film laminator - Google Patents

Abstract

(57) [Problem] To provide a film laminator that can apply a uniform pressure even when the width of a substrate changes and can attach a film to the substrate without generating wrinkles. A laminating roll is provided with a backup roll, wherein at least one of the lamination roll and the backup roll is a crown roll. A desired pressure is applied to both the lamination roll and the crown roll.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film laminator for attaching a dry film such as a photosensitive resist film to the surface of a printed board, a liquid crystal display board, a plasma display board, or other various substrates in a process of manufacturing the boards. Things.

[0002]

2. Description of the Related Art A conventional film laminator (also referred to as a sticking device) for sticking a dry film such as a photosensitive resist film on the surface of a substrate uses a flat roll as a lamination roll that comes into contact with the substrate via the dry film.

When a dry film is attached to a substrate using a lamination roll, it is necessary to make the pressure at which the lamination roll pushes the substrate through the dry film uniform, and attach the dry film at a uniform pressure over the entire substrate. However, the lamination roll is generally bent to press both ends of the lamination roll, and a curved pressure distribution determined by the pressing force and the rigidity of the lamination roll is determined. That is, the pressure for pressing the substrate at both ends of the lamination roll is high, and the pressure decreases toward the center. This tendency becomes more remarkable as the pressing force at both ends of the lamination roll is increased.

[0004] When the pressure of the lamination roll is increased in order to attach the dry film to the substrate at a high pressure, the pressure at both ends of the substrate increases but the pressure at the center is low. Will be reduced. Further, when the pressure distribution becomes extreme, wrinkles are generated in the dry film, and the sticking performance is significantly reduced.

Therefore, it has been proposed to use a backup roll to increase the pressing force of the lamination roll, as in the invention described in JP-A-6-315980.

[0006]

However, even if the pressure distribution is made uniform by using a backup roll, the pressure distribution of the lamination roll changes when the substrate size (hereinafter, referred to as substrate width) in the axial direction of the lamination roll changes. Thus, it was confirmed that the sticking performance was reduced.

Therefore, an object of the present invention is to provide a film laminator which can apply a uniform pressure to a substrate even when the width of the substrate changes and can attach a film to the substrate without generating wrinkles. It is in.

[0008]

A feature of the present invention to achieve the above object is that a film is attached to one or both sides of a substrate sequentially conveyed from a substrate feeding device by a lamination roll. A backup roll is provided on the lamination roll, at least one of the lamination roll and the backup roll is a crown roll, and a desired pressing force is applied to both the lamination roll and the backup roll.

In the combination of a flat roll and a crown roll or a combination of a crown roll and a crown roll, when a pressing force is applied to both ends of each roll, the tendency of the pressure distribution on the substrate can be reversed. At least one of them is a crown roll, and by adjusting the pressure at both ends of the lamination roll and the pressure at both ends of the backup roll, the pressure ｛or the linear pressure (= pressure 線 roll length) of the lamination roll can be reduced. Even if the height is increased or the substrate width changes, the pressure distribution on the substrate by the lamination roll can be made uniform.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a film laminator of the present invention.
This will be described with reference to the embodiment shown in FIG. In FIG. 1, a substrate B is transported on a transport roll 1 of an entrance conveyor. The cover film 4 of the dry film 3 such as a resist film fed from the feeding roll 2 is wound by a winding roll 5. The dry film 3 from which the cover film has been removed is conveyed by a lamination roll 7 composed of a flat roll via a roll 6 and is adhered on the substrate B. Outside the lamination roll 7 is a backup roll 8 composed of a crown roll. The outer circumference of the lamination roll 7 is covered with rubber, so that the elasticity of the rubber prevents the rolls 7 and 8 from being damaged by friction, and has the effect of improving the followability when the dry film 3 is attached to the substrate B. . Note that this elastic coating may be omitted.

A pressing force to the both ends of the lamination roll 7 with respect to the substrate B is applied by an air cylinder 10 via a clamp arm 9. A pressure is applied to the backup roll 8 by the air cylinder 11. The air cylinders 10 and 11 are independent drive systems to facilitate adjustment of the pressing force.

After attaching the dry film 3 to the substrate B,
The dry film 3 is cut by a cutter 12 and further sent downstream by a transport roll 13 of an exit conveyor.

The substrate B is conveyed from the lower left to the upper right in FIG.
Are supplied to the substrate B symmetrically in the vertical direction, and are attached to the upper and lower sides of the substrate B. Here, is the transport roll 1 of the exit conveyor
In order to make it easy to understand the shape relationship between the substrate B and the dry film 3 attached to the substrate B, illustration of the upper dry film 3 attached is omitted.

The dry film 3 is stuck on the substrate B in this manner, but by adjusting the pressing force of the lamination roll 7 which is a flat roll and the pressing force of the backup roll 8 of the crown roll as described above. The pressure distribution on the substrate B can be made uniform, and the dry film 3 can be securely adhered to the upper and lower surfaces of the substrate B without wrinkles.

The adjustment of the pressure distribution on the substrate B will be described below. FIG. 2A shows one of the conventional methods, that is, a state in which the dry film 3 on the upper and lower surfaces of the substrate B is pressed only by the lamination roll 7 composed of a flat roll.

When a pressing force of P is applied to both ends of each lamination roll 7 in the direction of the arrow, the lamination roll 7
Of the lamination roll 7 is determined by its own weight, the pressing force P, and the rigidity of the lamination roll 7. FIG. 2B schematically shows the pressure (roll pressure) on the substrate due to the bending at this time.

When the pressure P is small (the linear pressure is small),
As shown by the curve a, the distribution of the pressure (roll pressure) on the substrate B is relatively flat in the direction of the width W of the substrate B, while the bending amount is small, but when the pressing force P is large (the linear pressure is large),
As shown by the curve b, the amount of deflection is large and the pressure distribution (roll pressure) on the substrate B becomes sharp at both ends. That is, if the linear pressure is increased, the pressure drop at the center of the substrate B becomes large, and the adhesion of the dry film 3 at the center of the substrate B is reduced. It can be seen that this may cause wrinkles on the substrate B.

FIG. 3A also shows one of the conventional methods, that is,
An example using only a crown roll as the lamination roll 7 is shown. In this case, as shown by a curve c in FIG. 3B, at a certain linear pressure, the pressure distribution (roll pressure on the substrate B) becomes uniform, but when the linear pressure is further increased, the pressure distribution becomes opposite at both ends as shown by a curve d. When the linear pressure is decreased, the pressure decreases at both ends as shown by the curve e.

When the substrate width W is changed, the flat roll shown in FIG. 2 or the crown roll shown in FIG. 3 is changed to a pressure distribution similar to that when the linear pressure is increased when the substrate width is reduced, and is reduced when the substrate width is increased. The pressure distribution changes to the same as when the pressure is reduced.

FIG. 4 (a) shows the lamination roll 7 and the backup roll 8 according to one embodiment of the present invention shown in FIG. The pressure applied to the backup roll 8 composed of a roll is defined as P2.

The pressure distribution by the lamination roll 7 has the shape of a curve h in FIG. 4C, as in FIG. 2B. On the other hand, the pressure distribution by the backup roll 8 has a crown shape, and is as shown by a curve f in FIG. 4B. As a result of complementation of the curves h and f (the characteristics cancel each other out), the pressure distribution in which the lamination roll 7 presses the substrate B via the dry film 3 has the shape of the curve j in FIG. Even when the substrate width W changes, a uniform pressure can be applied. Therefore, the dry film 3 can be pressed over the entire surface of the substrate B with a uniform pressure to obtain good bonding performance. That is, even when the width of the substrate changes, the dry film 3 can be bonded to the substrate B without generating wrinkles. it can.

When it is necessary to increase the linear pressure of the lamination roll 7 due to the relationship between the substrate B and the dry film 3, the pressing force P1 is increased (curve i in FIG. Fig. 4
According to the pressure distribution of the curve g in FIG. 4B, the pressure distribution becomes uniform as shown by the curve k in FIG. Thus, a desired pressure distribution can be freely obtained by adjusting the mutual pressures P1 and P2. Similarly, even when the substrate width of the substrate B changes, the range of the uniform pressure distribution in the width direction can be changed by adjusting the pressing forces P1 and P2, and the uniform pressure matching the changed substrate width can be obtained. A pressure distribution can be obtained.

Such adjustment can be made by adjusting the relationship between the pressure applied to a flat roll having an arbitrary diameter and the pressure distribution (the characteristic shown in FIG. 4C), and applying the pressure to a crown roll having an arbitrary crown amount and an arbitrary diameter. By measuring the relationship between the pressure and the pressure distribution (the characteristics shown in FIG. 4B) in advance, it is possible to easily set the pressure applied to each of the rolls 7 and 8 corresponding to the substrate width. .

This is the case when the lamination roll 7 is a crown roll and the backup roll 8 is a cylindrical flat roll as shown in FIG.
The opposite side of the lamination roll 7 and the backup roll 8 may be a flat base 20 as described above.

In the embodiment of FIG. 6, the lamination roll 7 may be a crown roll as in the embodiment of FIG. 5, and the backup roll 8 may be a flat roll. Further, in FIGS. 5 and 6, both the lamination roll 7 and the backup roll 8 may be crown rolls.

4 and 5, if the dry film 3 is to be adhered to only one side of the substrate B, the lamination roll 7 in contact with the substrate B on the opposite side of the dry film 3 may be omitted from rubber coating. it can.

When the lamination roll 7 and the backup roll 8 have the same diameter, the pressures P1 and P2 can be easily adjusted. Further, if the lamination roll 7 side is made smaller in diameter than the backup roll 8, the dry film 3
, The pressing area of the lamination roll 7 against the substrate B becomes small, and the pressing of the substrate B becomes effective. Conversely, if the lamination roll 7 side has a large diameter, the pressing area against the substrate B becomes large, Pressing on the substrate B becomes soft.

FIG. 1 shows an example in which the dry film 3 is continuously supplied to the substrate B and cut by the cutter 12 after being attached. Thus, the present invention can be implemented even with a sheet-fed type sticking device cut with a cutter.

[0029]

As described above, according to the present invention, a uniform pressure can be applied even if the substrate width changes,
A film laminator capable of attaching a film to a substrate without generating wrinkles can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a film laminator according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state of pressure distribution when a flat roll is used as a lamination roll.

FIG. 3 is a diagram showing a state of pressure distribution when a crown roll is used as a lamination roll.

FIG. 4 is a diagram showing a state of pressure distribution on a substrate when a flat roll is used as a lamination roll, a crown roll is used as a backup roll, and the pressure applied to each roll is changed in the embodiment shown in FIG.

FIG. 5 is a diagram showing a combination of a lamination roll and a backup roll according to another embodiment of the present invention.

FIG. 6 is a diagram showing a combination of a lamination roll and a backup roll according to still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1 ... Conveyance roll 2 ... Feeding roll 3 ... Dry film 4 ... Cover film 5 ... Winding roll 6 ... Roll 7 ... Lamination roll 8 ... Backup roll 9 ... Clamp arm 10, 11 ... Air cylinder 11 ... Air cylinder 12 ... Cutter 20: Flatbed B: Substrate P, P1, P2: Pressing force

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor: Muneo Tsuruta 210 Nakanakanuma, Minamiashigara-shi, Kanagawa Fuji Photo Film Co., Ltd. (72) Inventor Shinji Uematsu 210 Nakanakanuma, Minamiashigara-shi, Kanagawa Fuji Photo Film Co., Ltd. (72) Inventor Takehiko Hayashi 794 Higashi-Toyoi, Kushimatsu City, Yamaguchi Prefecture Hitachi Techno Engineering Co., Ltd. Kasado Office (72) Inventor Katsuyoshi Watanabe 794 Higashi Toyoi, Kudamatsu City, Yamaguchi Prefecture Hitachi Techno Engineering Co., Ltd. Kasado Office (72) Inventor Kunihiro Kunihiro Person F-term (reference) 2H025 AA00 AB11 AB15 AB17 EA08 4F211 AD08 AG01 AG03 AH36 SA07 SC07 SD01 SP04 SP09

Claims (4)

[Claims] 1. A laminating roll for attaching a film to one or both sides of a substrate sequentially transferred from a substrate feeding device, wherein a laminating roll is provided with a backup roll, and at least one of the lamination roll and the backup roll is provided. A crown roll, and a desired pressing force is applied to both the lamination roll and the backup roll. 2. The film laminator according to claim 1, wherein said lamination roll has an elastic coating. 3. The method according to claim 1, wherein the film is attached to one side of the substrate.
A film laminator, wherein the substrate is placed on a flat base and each of the lamination roll and the backup roll is pressed. 4. A film laminator according to claim 1, wherein said lamination roll and said backup roll have the same diameter or different diameters.