JP2001188319A - End face protected photoresist film roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an end face protected photoresist film roll in which the lowering of the function of a sheetlike drying agent due to dew condensation is suppressed even when the roll is exposed to low temperature and returned to room temperature and the exudation of the resist from the end faces is suppressed even in long-term storage at room temperature and even under an external temperature change. SOLUTION: A photoresist film is rolled up on a cylindrical core 6 to obtain a photoresist film roll 5 and a thermoplastic resin sheet 1 having holes which pierce through the core and a sheetlike drying agent 2 are successively disposed on each end face of the photoresist film roll 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photoresist film roll, and more particularly to a photoresist film roll which is exposed to a low temperature and then returned to room temperature. The present invention relates to a photoresist film roll having improved quality in which the resist does not exude at the edge even after storage for a period.

[0002]

2. Description of the Related Art Conventionally, in order to form a printed wiring board, generally, a method of laminating a photoresist film on a copper-clad laminate, exposing, developing, plating or etching through a pattern mask has been carried out. Such a photoresist film has a three-layer structure of a light-transmitting support film, a photosensitive resin composition layer, and a protective film. To form an image using this, first, after removing the protective film, the photosensitive resin composition The product layer is pressed on a copper-clad laminate, the pattern mask is adhered to the light-transmitting support film, and active light (usually ultraviolet light) is irradiated (exposure), and then an alkali aqueous solution or an organic solvent is sprayed or dipped. After forming a resist pattern (development) and applying metal plating to the exposed copper foil portion, the cured resist portion is peeled off with an aqueous alkali solution or an organic solvent (resist peeling). A method of removing (etching) a copper foil portion exposed with a solution of hydrogen oxide / sulfuric acid, alkaline ammonia, or the like, or etching and resist peeling after development with a reverse pattern. Methods have been taken.

[0003] Such a photoresist film is usually rolled into a product and commercialized, and is distributed on the market. However, the photosensitive resin composition layer in the photoresist film has adhesiveness and fluidity. During storage, the photosensitive resin composition (resist) exudes from the end face of the roll, and the layers adhere to each other at the end of the roll, so that the roll cannot be rewound during use, or even if it can be rewound, it is rewound. There was a problem that the property was significantly deteriorated.

[0004] In order to solve such a problem, Patent No. 27
Japanese Patent No. 30630 proposes a laminated element in which a sheet-like desiccant is brought into contact with a roll end of a photoresist film to cover the roll, and such a method is used to stain the photosensitive resin composition layer from the end during winding and storage. It is described to prevent dispensing.

[0005]

However, in recent years,
In the export of photoresist film rolls overseas, in order to extend the warranty period of the photoresist film, such rolls are exposed to a low temperature, for example, transport at an extremely low temperature of about -20 ° C. Patent No. 2 above
In the method disclosed in the publication No. 730630, although exudation of the photosensitive resin composition at room temperature is prevented to some extent, a sheet-like desiccant is made of a hydrophilic material such as pulp, and a desiccant such as calcium chloride is added thereto. When the roll stored at low temperature is returned to room temperature because it is adhered, a large amount of condensation (water droplets) on the end face is absorbed in a short time, and the function of the desiccant is extremely reduced. And there was a risk of oozing. Further, even at room temperature, there is a disadvantage that a small amount of the photosensitive resin composition easily exudes due to a temperature change of the atmosphere during storage.

[0006]

The inventor of the present invention has made intensive studies on such problems and found that a photoresist film was wound around a cylindrical core (6) through an end face of a photoresist film roll (5). A photoresist film roll having an end face protected by sequentially providing a thermoplastic resin sheet (1) having a hole and a sheet-like desiccant (2) comprises:
Sudden dew condensation is prevented at the end of the roll, and the function of the sheet-like desiccant is maintained, so that exudation at the end can be prevented more than conventional methods. They found that no bleeding occurred and completed the present invention.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to FIG. The end face protecting photoresist film roll of the present invention is a thermoplastic resin sheet (1) having a core through-hole on an end face of a photoresist film roll (5) obtained by winding a photoresist film around a cylindrical core (6). And a sheet-like desiccant (2) are sequentially provided. Such a photoresist film is a polyester film,
A polyethylene film, a polypropylene film, a Teflon film, a support film such as a polyvinyl alcohol film, a photosensitive resin composition layer is formed on the photosensitive resin composition layer, if necessary, a polyester film on the photosensitive resin composition layer, It is a laminate of protective films such as polyethylene film and polypropylene film.

The photosensitive resin composition layer is not particularly limited, and is generally known as a film-imparting polymer, an ethylenically unsaturated compound, a photopolymerization initiator,
If necessary, a thermal polymerization inhibitor, a plasticizer, a dye (dye,
(Color changing agent), an adhesion promoter, an antioxidant, a solvent, a surface tension modifier, a stabilizer, a chain transfer agent, an antifoaming agent, a flame retardant, and other additives.

The photoresist film is wound around a cylindrical core (6) to form a photoresist film roll. The thermoplastic resin sheet (1) having a core through hole at the end face of the photoresist film roll (5). ) And a sheet-like desiccant (2) are sequentially provided.

The thermoplastic resin sheet (1) is preferably disposed in close contact with the end face of the photoresist film roll (5), and may be made of a thermoplastic material such as polystyrene, polyolefin, polyester, or polyvinyl chloride. Resins, preferably having the effect of a heat insulating material capable of preventing a rapid condensation state at the end face of the photoresist film roll (5) even when the temperature is returned from low temperature to room temperature, and polystyrene, polyester and polyvinyl chloride having low water absorption. Used. Further, the sheet is not particularly limited as long as the above-mentioned thermoplastic resin is formed into a sheet shape, and further a foaming agent is added to a sheet obtained by solidifying such a thermoplastic resin fibrous material or a sheet-like material. To form a sheet-like foam.

The thickness of the thermoplastic resin sheet (1) depends on the thickness of the photoresist film roll (5), but is preferably 0.1 mm or more, more preferably 0.1 mm or more.
５5 mm. If the thickness is less than 0.1 mm, dew condensation occurs rapidly at the end of the photoresist film roll (5), and the function of the desiccant is lost. The shape is not particularly limited as long as it has a core through-hole (3). Examples of the shape of the through-hole (3) include a circular shape and a non-circular shape. When the sheet (1) is detached, the sheet-shaped desiccant (2) described below
This is preferable because debris attached to the winding core (6) can be removed when attaching and detaching the core.

Next, a sheet desiccant (2) is provided outside the thermoplastic resin sheet (1). The sheet-like desiccant (2) contains a substance having a hygroscopic ability, such as calcium chloride,
Disperse, impregnate, coat and dry silica gel, molecular sieves, saccharides, especially saccharides with high osmotic pressure, and moisture-absorbing or water-absorbing agents such as water-absorbing resins in moldable materials such as natural celluloses, synthetic celluloses, glass cloth, and nonwoven fabrics. Or a moisture-absorbing layer, these moisture-absorbing agents or water-absorbing agents can be formed from these moldable materials, vinylon films, polyester films,
It is sandwiched between thermoplastic resin films such as polyethylene film, polypropylene film, and Teflon film. Among them, a particularly preferred layer configuration is a layer configuration of thermoplastic resin film / moisture absorbing layer / thermoplastic resin film. Here, the thermoplastic resin film more expresses the moisture absorbing effect of the moisture absorbing layer,
It is desired that the film be a porous film. Further, a mixture of the above-mentioned moldable material and a moisture absorbing agent or a water absorbing agent may be formed into a sheet-like desiccant (2).

The thickness of the sheet-like desiccant (2) varies depending on the thickness of the layer of the photoresist film roll (5), but is preferably 0.5 mm or more, and more preferably 0.8 to 0.8 mm.
1.5 mm. If it is less than 0.5 mm, the effect of suppressing seepage is weakened, which is not preferable. The shape of the sheet-like desiccant (2) is not particularly limited as long as it has a core through-hole (4), and the shape of the through-hole (4) may be either circular or non-circular. May be. The shape of the through hole (4) may be non-circular so that at least one void is formed between the through hole (4) and the surface of the core portion. This is preferable because no generation occurs and workability is improved. For example, as shown in FIG. 3, as an example, it is preferable that the sheet-like desiccant (2) has a shape in which a convex portion is provided on the inner side of a donut shape. Preferably, three) are provided.

According to the present invention, since the thermoplastic resin sheet (1) is interposed between the sheet-like desiccant (2) and the end of the roll, after being exposed to a low temperature, even if the temperature is returned to room temperature, dew condensation is sharply formed on the end face. No effect occurs, and there is an effect that there is no exudation due to a temperature change even at room temperature for a long time.

[0015]

The present invention will be specifically described below with reference to examples. Example 1 A photosensitive resin composition comprising a film-providing acrylic polymer, an ethylenically unsaturated compound, and a photopolymerization initiator was used as a photosensitive resin composition layer, and the photosensitive resin was formed on a polyethylene terephthalate film (film thickness: 20 μm). The composition layer (film thickness 40 μm) and the polyethylene film (film thickness 2
Using a photoresist film ("801Y40" manufactured by Nichigo Morton Co., Ltd.) on which
While slitting the photoresist film having a width of 0 m to a width of 330 mm, the photoresist film roll (5) was wound on an ABS core having a diameter of 76.2 mm with the film edges aligned, as shown in FIG. Polystyrene thermoplastic resin sheet (1) having a circular through hole (3) [thickness 0.18 mm, inner diameter 84 mm,
Outer diameter 169 mm] is attached to the end face, and the through hole (4) as shown in FIG. 3 has a non-circular shape so as to cover the thermoplastic resin sheet (1). (2) A photoresist film roll having an end face protected by providing [ID SHEET, manufactured by Japan Low Temperature Drying Co., Ltd., thickness 1.0 mm, outer diameter 169 mm] was prepared and evaluated as follows.

(Exudation) The following two types of evaluations were made. (1) Exudation after leaving at low temperature The photoresist film roll prepared above was -20
After leaving it at 30 ° C. for 3 days, it was exposed to an environment of 23 ° C. and 60 RH% for 10 hours, and the state of exudation of the end face was evaluated as follows. ○: no exudation is observed at all △: exudation is observed a little × ・ ・ ・ a large amount of exudation is observed (2) Exudation after long-term standing at room temperature The photoresist film prepared above Roll 23
After leaving for 1 week in an environment of 60 ° C. and 60 RH%,
After leaving for 1 week in an environment of 80 RH% and repeating this cycle twice, the exudation of the end portion was evaluated as follows. ○: No exudation is observed at all △: Exudation is observed a little ×: A large amount of exudation is observed Also, when using a roll of the above photoresist film, Even when the desiccant (2) and the thermoplastic resin sheet (1) were removed, no foreign matter such as dust adhered to the core (6).

Example 2 In Example 1, for both the thermoplastic resin sheet (1) and the sheet-like desiccant (2), the through-holes (3) and (4) were completely circular so as to completely fit in the core. (84m inside diameter
m, the outer diameter was 169 mm), and a photoresist film roll whose end face was similarly protected was manufactured and evaluated in the same manner.

Comparative Example 1 A photoresist film roll was produced in the same manner as in Example 1 except that the thermoplastic resin sheet (1) was omitted, and the same evaluation was performed.

Comparative Example 2 A photoresist film roll was manufactured in the same manner as in Example 1 except that the sheet-like drying agent (2) was omitted, and the same evaluation was performed. The evaluation results of Examples 1 and 2 and Comparative Examples 1 and 2 are shown in Table 1 below.

[0020]

[0021]

According to the present invention, there is provided a photoresist film roll having a protected end face, wherein a photoresist film roll (5) obtained by winding a photoresist film around a cylindrical core has a core through-hole (3). And (4), the thermoplastic resin sheet (1) and the sheet-like desiccant (2) are sequentially provided, so that even if the film is exposed to a low temperature and then returned to room temperature, a rapid condensation phenomenon can be prevented, and the room temperature can be maintained for a long time. This has the effect of preventing oozing even if the ambient temperature changes after storage for a period.

[Brief description of the drawings]

FIG. 1 is a front view of a photoresist film roll of the present invention.

FIG. 2 is a front view and a center cross-sectional view of a thermoplastic sheet.

FIG. 3 is a front view and a central sectional view of a sheet-like desiccant.

FIG. 4 is a configuration of a photoresist film roll of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Thermoplastic resin sheet 2 ... Sheet-shaped desiccant 3 ... Through-hole of thermoplastic resin sheet 4 ... Through-hole of sheet-shaped desiccant 5 ... Photoresist film roll 6 ... Core

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03F 7/004 512 G03F 7/004 512

Claims (4)

[Claims] 1. A thermoplastic resin sheet (1) having a core through-hole on an end face of a film roll (5) obtained by winding a photoresist film around a cylindrical core (6), and a sheet desiccant (2). ), A photoresist film roll having a protected end face. 2. The photoresist film roll according to claim 1, wherein the thermoplastic resin sheet (1) is made of any one of polystyrene, polyester, and polyvinyl chloride. 3. The sheet-shaped desiccant (2) is non-circular in shape so that at least one void is formed between the core and the surface of the core. 2. The photoresist film roll according to 2, wherein the end face is protected. 4. The end face is protected according to claim 1, wherein the sheet-like desiccant (2) has a shape in which at least one projection is provided inside a donut. Photoresist film roll.