JPS6173155A - Peeling developing device - Google Patents

Abstract

PURPOSE:To keep a peeling force per unit length of a peeling part constant, and to peel off uniformly the overall length in the width direction of a transparent supporting body, along a peeling bar, by detecting a peeling width of a substrate with which the peeling bar comes into linear contact and controlling a receiving tension of a receiving pinch roll in proportion to said peeling width. CONSTITUTION:A DC motor of receiving pinch rolls 7, 7 is controlled by a peeling force control system so that the pinch rolls 7, 7 generate a tensile force corresponding to a peeling width from a substrate 2 on which a transparent supporting body 4 comes into linear contact with a peeling bar 6, and a peeling force per unit length of a peeling part running along the peeling bar 6 becomes constant. The peeling force control system is obtained, for instance, due to a fact that a DC motor 13 is brought to speed control by a seed controlling closed loop circuit of the DC motor 13.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a peeling and developing device used for manufacturing printed circuits and the like.

<Prior Art> For the production of printed circuits, etc., the above-mentioned photo-coating of an image-forming material consisting of a transparent support and a photopolymerizable composition layer coated on the support is applied to the surface of an image-forming substrate. The polymerizable composition layer side is adhered, and the photopolymerizable composition is imagewise exposed to light to form a cured area, and if necessary, the image forming material is heated, and then the support and the light Image forming means has already been proposed in which an unexposed portion of a polymerizable composition layer is peeled off from a substrate to form an image-like resist on the substrate.

It is no exaggeration to say that in the peeling development method as described above, the important point for obtaining a good image with a sharp finish is the peeling step of the image forming material.

By the way, as a means for peeling off the image forming material, the inventors have developed an apparatus that sequentially attaches and peels off a continuous adhesive tape to a support on a substrate, that is, as shown in FIGS. A narrow adhesive tape 1 is pasted on the transparent support 4 of the image forming material 3 so as to cover the corner of the rectangular substrate 2, and the substrate 2 is held diagonally between a pair of upper and lower conveying pinch rolls 5, 5. Feeding, adhesive tape 1 and image forming phase 1313
The adhesive tape 1 and the support 4 are peeled off from the corners of the rectangular substrate 2 by a pair of pinch rolls 7.7 along the peeling bar 6 arranged so as to form a line on the substrate 2 through the peeling bar 6. , a support and a luminescent photopolymerizable composition layer 8
The photopolymerizable composition core 8 was peeled off from the substrate and exposed to light.
It is proposed that b remains on the substrate 2.

<Problem 3 (n) to be solved by the invention> By the way, the substrate 2 is conveyed obliquely, and the adhesive tape 1 and the transparent support 4 are
A device that pulls the material at a uniform speed with a pinch roll 7.7 for peeling and peels it along the peeling bar 6 is attached to the peeling bar 6.
If the line length of the transparent support 4 (a), that is, the peel width of the support from the substrate 2 during peeling, changes from moment to moment, and the pulling pinch rolls 7. Peeling force per length also changes.

Therefore, if the pulling force by the picking-up pinch roll 7.7 is weak and the peeling force is insufficient, the transparent support cannot be peeled off from the substrate, and conversely, if the peeling force is too strong, the transparent support cannot be picked up. The problem is that the probability decreases.

Further, at this time, due to fluctuations in peeling force, the transparent support does not follow the peeling bar, resulting in a so-called chatter phenomenon, which causes the following problems.

fI) Partial unexposed areas remain.

fl[) The exposed area is partially peeled off.

(3) The image lines in the exposed area are jagged and the resolution is reduced.

■ In the case of through-hole substrates manufactured by the so-called tenting method, which protects the through-holes in the substrate from etching spray liquid, the tenting film is damaged.

M There are many pickup errors for transparent supports, and pickup errors for thin substrates are particularly noticeable.

This invention was made in order to solve the various problems mentioned above, and eliminates the so-called chatter phenomenon of the transparent support during peel development, stabilizes peeling, and provides a good image over the entire surface of the substrate. It is an object of the present invention to provide a peeling and developing device that can perform the following steps.

<Means for Solving the Problems> In order to solve the above problems, the present invention detects a substrate peeling width equal to the length of a transparent support lined into a peeling bar, and uses a pair of pinch rolls for taking off. The device is also equipped with a peeling force control system that generates a take-off tension according to the substrate peeling width.

Function: After exposing the image forming material to light in a pattern, adhesive tape is laminated so as to cover the corners of the rectangular substrate.
This substrate is sent between transporting bimboo rolls, and then the adhesive tape and transparent support are pulled with a pick-up pinch roll, and the transparent support is not peeled off from the corner of the substrate at the same time as the tape sticks along the peeling bar.

At this time, the peeling bar detects the IJ temporary peeling width,
By controlling the pulling tension of the pinch roll for pulling in proportion to the peeling width, the peeling force per unit length of the peeled portion is kept constant and the entire widthwise length of the transparent support body is peeled uniformly along the peeling bar. Recite.

<Embodiments> Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

As shown in FIGS. 1 and 2, the peeling device removes the substrate 2.
A pair of conveyance pinch rolls 5.5 are placed above and below the conveyance path, and a peeling bar 6 is placed in front of the upper pinch roll 5 in the feeding direction so as to be parallel to the pinch roll 5.
and a pair of pick-up pinch rolls 7.7 arranged above the peeling bar 6. The conveyance pinch rolls 5.5 are driven by a DC motor and convey the substrate 2 at a constant speed. ing.

The pick-up pinch roll 7.7 is also driven by a DC motor and serves to pick up the adhesive tape 1 and the transparent support 4 and peel them off from the substrate 2 along the peeling bar 6.

The DC motor of the picking-up pinch roll 7.1 is operated by a peeling force control system so that the pinch roll 7.7 generates a pulling tension corresponding to the peeling width from the substrate 2 where the transparent support 4 is in line contact with the peeling bar 6. The peeling force applied to the single Kt length of the peeling portion along the peeling bar 6 is controlled to be constant.

The above-mentioned peeling force control system is, for example, not shown in FIG.
3 speed υ[1 by closed loop circuit, DC motor 13
is obtained by controlling the speed. That is, due to the characteristics of the DC motor, a load, in this case a torque corresponding to the length tangential to the peeling bar 6, that is, the substrate peeling width, is generated, and this torque drives the take-off pinch roll 7.7. Therefore, the unexposed photopolymerizable composition 1iJ8a can be peeled off from the cover plate 2 together with the transparent support 4 with a pulling tension proportional to the width of the substrate.

In addition, Fig. 5 shows the setting pulse vlP according to the setting take-up speed.
s is compared with the detection pulse P detected by the pulse encoder 11 that is transmitted to the rotating shaft of the DC motor 13, and then the calculation unit 12 performs calculations to control the motor 13.

To control the pulling tension of the pulling pinch rolls 1, 1, it is possible to control the peeling width by not only directly controlling the DC motor 13, but also by arranging a powder clutch between the motor and the power transmission system between the pulling pinch rolls 7.1. The take-up tension may be changed by controlling the powder clutch using the detection signal.

Note that when processing a substrate with image forming materials laminated on both sides, peeling devices may be placed on both the upper and lower sides of the substrate conveyance path, and conveyance pinch rolls 5 may be installed to improve the peeling effect.
, 5 and the peeling bar 6 may be provided with heating means.

The present invention has the above-mentioned structure, and the rectangular substrate 2 on which the image forming material 3 is laminated and exposed is transported with the adhesive tape 1 set at the tip corner, as shown in FIG. When inserted between the pinch rolls 5, 5, the adhesive tape 1 is pasted on the transparent support 4, and after passing directly under the peeling bar 6, the adhesive tape 1 is pulled by the pick-up pinch roll 7.7 on the upper side. It will be destroyed.

A sensor detects the cross-section in the width direction that is in contact with the peeling bar 6 of the rectangular substrate 2, which is conveyed diagonally at a constant speed by the conveying pinch rolls 5, 5, and based on this detection signal, the taking-off pinch roll 7
．． Control the take-up tension of 7.

FIG. 6 shows the relationship between the change in peel width length of the transparent support 4 with respect to the rectangular substrate 2 and the current supply to the motor 13 of the take-off pinch roll 7.7, and as is clear from the figure, the peel width The current is changed in direct proportion to the length, and the peeling force per unit length of the peeled portion along the peeling bar 6 is kept constant.

Accordingly, the adhesive tape 1, the transparent support 4, and the unexposed photopolymerizable composition layer 8a are sequentially peeled off along the peeling bar 6 from the leading edge corner to complete peeling development.

Here, the transparent support 4 has a constant peeling force per unit length of the peeled portion, so even if the peeling width changes every moment, there is no lifting from the peeling bar 6 over the entire peeling width, resulting in the so-called chatter phenomenon. will no longer occur.

In addition, since the transparent support 4 is peeled off along the peeling bar 6, the peeling angle of the transparent support 4 with respect to the substrate 2 can be set large, and the peeling force per unit length of the peeled portion is constant, so that the tente, r Unlike in the case of a through-hole substrate manufactured by the printing method, the exposed portion of the photopolymerizable composition layer tenting the loose ball portion does not peel off together with the transparent support 4.

<Effect> As described above, according to the present invention, the pulling tension of the pinch roll for peeling off the transparent support of the image forming material along the peeling bar can be controlled according to the peeling width and length of the support. So the support along the peel bar! The peeling force per unit length of the peeling portion is always constant, and even if the peeling width of the support changes, the support does not float up from the peeling bar. Therefore, it is possible to transport a square substrate diagonally. Even if peeling is performed, the occurrence of chatter phenomenon during peeling is eliminated, all problems caused by the chatter phenomenon are solved, and a good image can be obtained over the entire surface of the substrate.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the peeling and developing device according to the present invention, FIG. 2 is a side view of the same, FIG. 3 is an enlarged sectional view of the same essential parts, and FIG. 4 is a plan view showing the relationship between the substrate and the adhesive tape. FIG. 5 is a block diagram of the peeling force tIIIgA system, and FIG. 6 is an explanatory diagram showing the relationship between power supply to the motor of the pick-up pinch roll and substrate width. DESCRIPTION OF SYMBOLS 1... Adhesive tape 2... Square substrate 3... Image forming material 4... Transparent support 5... Pinch roll for conveyance 6... Peeling bar 7... Pinch roll for collection Patent application Representative of Nitto Electric Industry Co., Ltd. Patent attorney Kazu 1) Showa 3
Figure↑

Claims (4)

[Claims] (1) An image forming material consisting of a transparent support and a photopolymerizable composition layer is laminated on the surface of a rectangular substrate on which an image is to be formed, and after patterned exposure, a pair of pinch rolls for conveying the substrate is used. While conveying the rectangular substrate diagonally, an adhesive tape is applied so as to cover the tip corner of the rectangular substrate, and then this adhesive tape is applied along a peeling bar arranged so as to be in line contact with the substrate via the adhesive tape and the image forming material. Then, the support and the unexposed photopolymerizable composition layer are peeled off from the substrate along with the adhesive tape by peeling at a uniform peeling speed with a pair of pinch rolls for taking off,
In a peeling and developing device that leaves the exposed photopolymerizable composition layer on the substrate, a support peeling width equal to the length of the transparent support in line with the peeling bar is detected, and a pair of pinch rolls for take-off are used to detect this peeling width. A peeling developing device comprising a peeling force control system that generates a take-up tension according to the peeling width of the support. (2) The peeling developing device according to claim 1, wherein the peeling force control system uses a DC motor to drive the take-off pinch roll. (3) The peeling force control system detects the substrate width with a sensor,
The peeling developing device according to claim 1, wherein the picking-up pinch roll is controlled by computer processing this detection signal. (4) The peeling force control system controls the peeling force by arranging a powder clutch in the power transmission system of the pick-up pinch roll and energizing the powder clutch with a current proportional to the detection signal of the substrate width detection sensor. A peeling and developing device according to claim 1, which is adapted to perform the following steps.