JPS61279854A - Stripping development method - Google Patents

Abstract

PURPOSE:To prevent a base plate from being wound up in the stripping development method for use in printed circuits and the like by controlling the distance between a stripping bar and the pressing bar to the total thickness of a carrier tape, a transparent support, and the nonexposed parts of a photopolymerizable composition. CONSTITUTION:The photopolymerizable composition 4, the transparent support 3 are successively laminated on the base plate 5 to form an image forming material. This is exposed to harden the exposed parts 4a, the carrier tape 2 for stripping the support 3 and the nonexposed parts 4b is attached to the support 3, and the support 3 and the nonexposed parts 4b are stripped by pulling up the tape 2 along the edged corner part 1a of the stripping bar 1 from the parts 4a and the base plate 5. The bar 6 for pressing the base plate 5 is arranged above the base plate 5 and opposite to the bar 1 and the distance D between both bars 1, 6 is controlled to a size equal to the total thickness of the tape 2, the support 3, and the parts 4b, thus permitting the base plate 5 to be prevented from being wound up together with the tape 2 even if the base plate 5 is thin.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a peeling and developing method used for manufacturing printed circuits and the like.

[Conventional technology]

In order to produce a printed circuit, the photopolymerizable composition layer of an image-forming material, which is formed by coating a photopolymerizable composition layer on a transparent support, is laminated on the surface of an image-forming substrate to form an image. After exposing to light to form a cured area and further heating the image forming material as necessary, peeling the support from the substrate,
Imaging means have already been devised for forming image-like resists on substrates.

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

As a method for peeling and developing this type of image-forming material, for example, by moving the substrate relative to the transparent support in the image-forming material after exposure, a continuous adhesive tape is sequentially pressed, and the support is attached to the transparent support. There is a method in which the deposited photopolymerizable composition layer is peeled off from the substrate together with the unexposed part, so that only the exposed part of the layer remains on the surface of the substrate.

However, in the conventional method described above, no consideration is given to the peeling angle of the transparent support, and the peeling angle between the substrate and the transparent support is shallow and unstable, and when the substrate is hard, the peeling angle of the transparent support is The substrate moves straight in a stable manner against the peeling force, but if the substrate is soft and flexible, the substrate is lifted together with the transparent support, making it difficult to maintain the peeling angle.

On the other hand, a method of peeling off the support using nip rolls has been devised, but this method cannot be used when the substrate is soft and flexible and has a large number of unexposed areas, or when the substrate is very thin.
These substrates are lifted together with the transparent support, making it difficult to maintain the peeling angle, making it difficult to obtain a good pattern.

In order to solve this problem, a method has been devised that uses a peeling bar 1 having an edge-shaped corner portion 1a, as shown in FIG. This is done by aligning the corner part 1a of the peeling bar 1 with the transparent support 3 of the image forming material attached to the carrier sheet or carrier tape 2 and the unexposed part 4b of the photopolymerizable composition layer 4, and peeling it off. This is what I did.

[Problem that the invention seeks to solve]

However, when the substrate 5 is thick, the method shown in FIG.
However, if the substrate 5 is thin, it will be deformed together with the transparent support 3 to which the unexposed portion 4b is attached, and development will not be possible, as shown by the chain line in the figure. In some cases, the carrier sheet or carrier tape 2 was wound up.

Therefore, in order to improve this problem, that is, to prevent the substrate 5 from being rolled up together with the carrier sheet or carrier tape 2, the inventors created a certain gap between the peeling bar 1 and the peeling bar 1 as shown in FIG. We devised and tried installing a board holding bar 6 that was opened.

However, with the above improvement measures, although it is possible to prevent the board 5 from being wound up by the board holding bar 6 to some extent,
If the distance between the peeling bar 1 and the substrate 5 is too large, the substrate 5 will be stuck between the peeling bar 1 and the substrate holding bar 6 when the substrate 5 is thin and soft.
It was not possible to reliably prevent the film from being wound up between the paper and the film, which could result in image defects. This tendency was particularly noticeable when forming a pattern image with a large number of unexposed areas.

From the above viewpoint, the present invention can reliably prevent the substrate from being rolled up when the transparent support is peeled off, regardless of the thickness and hardness of the substrate, and even when forming a pattern image with a large number of unexposed areas. The object of the present invention is to provide a peel-off development method.

[Means for solving problems]

As a result of intensive studies to achieve the above object, the inventors have developed the above-mentioned peeling and developing method using a peeling bar and a substrate holding bar.

□, 6 and 1. Ya1. Aaaah. (In short, carrier sheet, transparent support and photopolymerization
By setting the dimensions to be approximately the same as the sum of the thicknesses of the unexposed areas of the monochromatic composition layer, peeling development can be achieved.
□゛We have discovered that this can be done very well and have completed this invention.

That is, the present invention provides a transparent support and a photopolymerizable composition layer on the surface of a substrate on which an image is to be formed.
□,,.

After laminating the image forming materials consisting of the above-mentioned support and the photopolymerizable composition layer and exposing them to light in a pattern,
□ In a peeling development method in which the unexposed area is peeled off from the substrate and the exposed area of the photopolymerizable composition layer remains on the substrate,
Co'+taBrlRia+ is placed on the image forming material via a carrier sheet or carrier tape.
+')? '/ ) b I-< L! It'
JT? −.

a peeling bar that peels off the unexposed portion of the transparent support and the photopolymerizable composition layer from the substrate via a strip; and a substrate holding bar that handles the substrate on which the image is formed at a position opposite to the peeling bar; The distance between the above-mentioned peeling bar and the substrate holding bar is set to a small gap equivalent to the sum of the thicknesses of the carrier tape or carrier sheet, the transparent support, and the unexposed portion of the photopolymerizable composition layer. The present invention relates to a peeling development method characterized in that:

[Effect]

In this invention, since the distance between the peeling bar and the substrate holding bar is such that the substrate cannot enter, the substrate is wound up from between the peeling bar and the substrate holding bar when the transparent support is peeled off. will definitely be prevented.

〔Example〕

FIG. 1 shows a peeling and developing method according to the present invention, and the same parts as in FIGS. 2 and 3 are given the same reference numerals and the explanation thereof will be omitted.

In the figure, the distance between the peeling bar 1 and the substrate holding bar 6 is determined by the thickness of the carrier sheet or the carrier tape 2 in this example, the transparent support 3, and the unexposed portion 4b of the photopolymerizable composition layer 4. The gap is set to be approximately the same as the total dimension of the

With this configuration, the substrate 5, which tends to deform upward during peeling by the peeling bar 1, is held down by the substrate holding bar 6, and the support 3 and the unexposed portion 4b are peeled off smoothly. In particular, since the distance between the peeling bar 1 and the substrate holding bar 6 is set to a specific small gap as described above, there is no space for the substrate 5 to be rolled up from between the two 1 and 6, and therefore the substrate 5 is carrier tape 2
At the same time, problems such as the occurrence of wrinkles due to being wound up can be reliably prevented.

Note that the above-mentioned spacing cannot be determined approximately depending on the respective thicknesses of the carrier sheet or carrier tape 2, the transparent support 3, and the photopolymerizable composition layer 4, but the total dimension of each of these thicknesses is defined as D' Then, generally D-D'=O~0.2f
It is preferable to set it to approximately i.

〔Effect of the invention〕

As described above, the present invention adjusts the distance between the peeling bar and the substrate holding bar to the thickness of the carrier sheet or carrier tape, the transparent support 3 of the image forming material, and the unexposed portion of the photopolymerizable composition layer. Since the gap is set to be about the same as the thickness dimension in which , there is no longer a space between the peeling bar and the substrate holding bar in which the substrate can enter.
As a result, it is possible to reliably prevent the substrate from being rolled up together with the carrier sheet or carrier tape, and to ensure stable peeling and developing performance.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a peel-off developing method according to the present invention, FIG. 2 is an explanatory diagram of a conventional peel-off developing method, and FIG. 3 is an explanatory diagram of a peel-off developing method different from that according to the present invention. ■... Peeling bar, 2... Carrier tape (carrier sheet), 3... Transparent support, 4... Photopolymerizable composition layer, 4a... Exposed area, 4b... Unexposed Part 5...
・Substrate, 6... Board holding bar, D... Spacing Diagram 1 D; Spacing

Claims (1)

[Claims] (1) An image forming material consisting of a transparent support and a photopolymerizable composition layer is laminated on the surface of a substrate on which an image is to be formed, and after patterned exposure, the above support and photopolymerizable composition are layered. In a peeling development method in which the unexposed portion of the photopolymerizable composition layer is peeled off from the substrate and the exposed portion of the photopolymerizable composition layer remains on the substrate, the photopolymerizable composition layer is placed on the image forming material via a carrier sheet or carrier tape. A peeling bar peels off the transparent support and the unexposed portion of the photopolymerizable composition layer from the substrate at the corner part via the carrier sheet or carrier tape, and the substrate on which the image is formed is handled at a position opposite to this peeling bar. A substrate holding bar is provided to release the substrate, and the distance between the peeling bar and the substrate holding bar is the thickness dimension that is the sum of the thicknesses of the carrier tape or carrier sheet, the transparent support, and the unexposed portion of the photopolymerizable composition layer. A peeling development method characterized in that the gap is set to the same level as that of the peeling development method.