TWI822348B - Transfer method for uv optical film - Google Patents

Abstract

The present invention provides a transfer method for ultraviolet (UV) optical film and a manufacturing method of a transferring roller by using a deep UV light. The transfer method includes: coating a photoresist (PR) layer onto an outer surface of a metallic roller; emitting a deep UV light having a predetermined exposure wavelength, which forms a predetermined light shape by passing through a mask or an interference, to travel onto the PR layer, so that the PR layer becomes a patterned transfer layer; continuously using the patterned transfer layer to roll onto a UV optical film; and emitting a solidifying UV light having a wavelength in a predetermined light curing band to irradiate and to solidify on the UV optical film being shaped. The predetermined exposure wavelength is less than the predetermined light curing band by at least 100 nm.

Description

UV optical film transfer method

The present invention relates to a transfer roller, and in particular to an ultraviolet optical film transfer method and a manufacturing method of a transfer roller using deep ultraviolet light.

If the transfer layer of the existing transfer roller adopts ultraviolet exposure material, the optical film to be rolled and transferred needs to avoid using ultraviolet curing material, so as to avoid the transfer layer from being cured when the optical film is rolled. Damage results in distortion of the transferred pattern. Therefore, the inventor believed that the above-mentioned defects could be improved, so he devoted himself to research and applied scientific principles, and finally proposed an invention that is reasonably designed and effectively improves the above-mentioned defects.

Embodiments of the present invention provide an ultraviolet optical film transfer method and a transfer roller manufacturing method using deep ultraviolet light, which can effectively improve the possible defects of existing transfer rollers.

Embodiments of the present invention disclose a UV optical film transfer method, which includes: implementing a roller manufacturing step: manufacturing a transfer roller, and the manufacturing process includes: coating a photoresist layer on the outer surface of a metal roller; to have a A deep ultraviolet (DUV) with a preset exposure wavelength forms a predetermined light shape through a photomask or interference, and then irradiates the photoresist layer, so that the photoresist layer forms a pattern transfer layer; wherein , the pattern transfer layer and the metal roller together constitute the transfer roller; implement a transfer step: the transfer roller is continuously rolled on an ultraviolet On the line optical film; wherein, the ultraviolet optical film can be irradiated and cured by ultraviolet light with a wavelength falling within a preset light curing band, and the preset exposure wavelength of the deep ultraviolet light falls within the preset light curing band. outside the photo-curing wavelength band, and the preset exposure wavelength is at least less than 100 nanometers compared to the pre-set photo-curing wavelength band; and a curing step is performed: using a wavelength that falls within the pre-set photo-curing wavelength band. Curing ultraviolet rays are used to irradiate and cure the ultraviolet optical film rolled by the transfer roller.

Embodiments of the present invention also disclose a method for manufacturing a transfer roller using deep ultraviolet light, which includes: coating a photoresist layer on the outer surface of a metal roller; passing a deep ultraviolet light with a preset exposure wavelength through a photomask or interference A predetermined light shape is formed, and then irradiated on the photoresist layer, so that the photoresist layer forms a pattern transfer layer; wherein the preset exposure wavelength is between 190 nanometers and 250 nanometers; and A fluorine compound layer is formed on the outer surface of the pattern transfer layer; wherein the fluoride compound layer, the pattern transfer layer, and the metal roller together constitute the transfer roller.

In summary, the ultraviolet optical film transfer method and the transfer roller manufacturing method using deep ultraviolet light disclosed in the embodiments of the present invention are limited by specific conditions (such as: the preset exposure wavelength is compared with the preset exposure wavelength). Assuming that the photocuring wavelength band is at least less than 100 nanometers), the pattern transfer layer can be made of ultraviolet exposure material, the optical film rolled by the transfer roller can be made of ultraviolet curable material, and the pattern transfer layer is relatively It will not be damaged by the influence of the curing ultraviolet rays, thereby effectively maintaining the roll forming accuracy of the transfer roller.

In addition, the ultraviolet optical film transfer method and the deep ultraviolet transfer roller manufacturing method disclosed in the embodiments of the present invention can also be formed by forming the fluorine compound layer, so that the fluorine compound layer is rolled during the rolling process. After the UV optical film is applied, the molding surfaces in high-pressure contact between the two can be effectively separated from each other, and there is less chance of mutual influence or appearance damage.

In order to further understand the characteristics and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, these descriptions and drawings are only used to illustrate the present invention and do not make any reference to the protection scope of the present invention. limit.

S100: Roller manufacturing steps

S110: Coating process

S120: Patterning process

S200: Transfer step

S300: Curing step

100: Transfer roller

1:Metal roller

2a: Photoresist layer

2:Pattern transfer layer

21:Outer surface

22:Crack

3: Fluorine compound layer

200:UV optical film

M: photomask

S1: exposure light source

S2: Curing light source

L1: Deep UV

L2: Curing UV

Figure 1 is a schematic flow chart of the steps of the ultraviolet optical film transfer method according to Embodiment 1 of the present invention.

Figure 2 is a schematic diagram of the coating process in Figure 1.

Figure 3 is a schematic diagram of the patterning process in Figure 1.

FIG. 4 is a schematic diagram of another aspect of the patterning process in FIG. 1 .

FIG. 5 is a schematic diagram of the patterning process in FIG. 1 .

6 is a schematic diagram of the transfer step and the curing step of the ultraviolet optical film transfer method according to Embodiment 1 of the present invention.

Figure 7 is a schematic diagram of the ultraviolet optical film transfer method in Embodiment 2 of the present invention.

FIG. 8 is an enlarged schematic diagram of area VIII in FIG. 7 .

FIG. 9 is an enlarged schematic diagram of area IX in FIG. 7 .

FIG. 10 is a schematic diagram of the transfer step and the curing step of the ultraviolet optical film transfer method in Embodiment 3 of the present invention.

The following is a specific example to illustrate the implementation of the "Ultraviolet optical film transfer method and transfer roller manufacturing method using deep ultraviolet rays" disclosed in the present invention. Those skilled in the art can understand the present invention from the content disclosed in this specification. Advantages and effects of the invention. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depictions based on actual dimensions, as is stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to to limit the scope of protection of the present invention.

It should be understood that although terms such as “first”, “second” and “third” may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another component or one signal from another signal. In addition, the term "or" used in this article shall include any one or combination of more of the associated listed items depending on the actual situation.

[Example 1]

Please refer to Figures 1 to 6, which are Embodiment 1 of the present invention. This embodiment discloses a UV optical film transfer method, which sequentially includes: a roller manufacturing step S100, a transfer step S200, and a curing step S300, but the invention is not limited thereto. For example, the UV optical film transfer method can also add corresponding other steps according to design requirements.

It should be noted that the roller manufacturing step S100 is explained in conjunction with the transfer step S200 and the curing step S300 in this embodiment, but the invention is not limited thereto. For example, in other embodiments not shown in the present invention, the roller manufacturing step S100 can be regarded as a transfer roller manufacturing method using deep ultraviolet light, and can be implemented alone or in conjunction with other steps. The steps S100 to S300 of the ultraviolet optical film transfer method will be introduced below.

The roller manufacturing step S100: As shown in FIGS. 1 to 5 , a transfer roller 100 (eg, FIG. 6 ) is manufactured, and the manufacturing process sequentially includes a coating process S110 and a patterning process S120. It should be noted that the roller manufacturing step S100 is achieved by implementing the above-mentioned multiple processes S110 and S120, so that no nickel metal material can be used in the roller manufacturing step S100, thereby significantly reducing manufacturing costs. Effect. That is to say, any roller manufacturing step using nickel metal is not the roller manufacturing step S100 (or the transfer roller manufacturing method using deep ultraviolet rays) referred to in this embodiment.

The coating process S110: As shown in Figure 1 and Figure 2, on the outer surface of a metal roller 1 A photoresist layer 2a is coated. Wherein, the metal roller 1 is a chromium metal roller or a copper metal roller, and the length of the metal roller 1 is preferably greater than 1.5 meters (m), and the photoresist layer 2a is made of positive photoresist. After exposure, the illuminated part will dissolve during development, leaving behind the pattern of the unexposed part after development.

Furthermore, in this embodiment, the photoresist layer 2a covers the entire outer surface of the metal roller 1 to form a seamless structure; that is, the photoresist layer 2a covers the entire outer surface of the metal roller 1 in any direction perpendicular to the length of the metal roller 1. In a cross section, the photoresist layer 2a is circular and covers the entire outer surface of the metal drum 1 without gaps.

The patterning process S120: As shown in Figure 1 and Figures 3 to 5, a deep ultraviolet L1 (deep ultraviolet, DUV) with a preset exposure wavelength is used to form a predetermined light shape through the mask M or interference, Then, it is irradiated on the photoresist layer 2a, so that the photoresist layer 2a forms a pattern transfer layer 2. In this embodiment, the pattern transfer layer 2 and the metal roller 1 together constitute the transfer roller 100, and the preset exposure wavelength of the deep ultraviolet light L1 is preferably between 190 Nanometer (nm) ~ 250 nanometers.

Furthermore, an exposure light source S1 used to emit the deep ultraviolet light L1 can be at least one laser diode chip capable of emitting between 190 nanometers and 250 nanometers, but this type can be adjusted and changed according to design requirements. , the present invention is not limited to this. The photomask M may have a gradient distribution of gray scale values, thereby facilitating the passage of the deep ultraviolet light L1 to form the predetermined light shape.

Furthermore, as shown in FIG. 3 , the exposure range of the exposure light source S1 and the photomask M may correspond to the local length range of the metal drum 1 in this embodiment, so that the exposure light source S1 The photomask M can move from one end of the metal drum 1 to the other end when the metal drum 1 rotates to perform exposure operations.

Alternatively, as shown in FIG. 4 , the exposure range of the exposure light source S1 and the photomask M may also correspond to the entire length range of the metal drum 1 in this embodiment, so that the exposure range The light source S1 and the photomask M can remain stationary when the metal drum 1 rotates, so that the exposure operation can be performed.

The transfer step S200: As shown in FIGS. 1 and 6 , the transfer roller 100 (such as the pattern transfer layer 2 ) is continuously rolled on an ultraviolet optical film 200 . Among them, the selection of the ultraviolet optical film 200 must meet the following characteristics: it can be irradiated and cured by ultraviolet light whose wavelength falls within a preset light curing band, and the preset exposure wavelength of the deep ultraviolet light L1 is within a preset light curing band. Outside the preset photocuring wavelength band, and the preset exposure wavelength is at least less than 100 nanometers compared to the preset photocuring wavelength band. In this embodiment, the preset photocuring wavelength band is preferably between 350 nanometers and 410 nanometers, but the invention is not limited thereto.

The curing step S300: As shown in Figures 1 and 6, a curing ultraviolet light L2 whose wavelength falls within the preset light curing band is used to irradiate and cure all the parts rolled by the transfer roller 100. The ultraviolet optical film 200 is described. Wherein, a curing light source S2 used to emit the curing ultraviolet light L2 may be at least one light-emitting diode chip capable of emitting between 350 nanometers and 410 nanometers, and the type of the at least one light-emitting diode chip includes There are laser diode chips, but this type can be adjusted and changed according to design requirements, and the present invention is not limited thereto.

As mentioned above, the ultraviolet optical film transfer method disclosed in this embodiment is limited by specific conditions (such as: the preset exposure wavelength is at least less than 100 nanometers compared to the preset photocuring wavelength band). ), so that the pattern transfer layer 2 can be made of ultraviolet exposure material, the optical film rolled by the transfer roller 100 can be made of ultraviolet curable material, and the pattern transfer layer 2 is less susceptible to the curing The transfer roller 100 is damaged due to the influence of ultraviolet rays L2, thereby effectively maintaining the roll forming accuracy of the transfer roller 100 .

[Example 2]

Please refer to Figures 7 to 9, which are Embodiment 2 of the present invention. Since this embodiment is similar to the above-mentioned Embodiment 1, the similarities between the two embodiments will not be described again. This embodiment The differences compared with the above-mentioned Embodiment 1 are roughly explained as follows: In this embodiment, the roller manufacturing step further includes a forming step after the patterning process, that is: on the pattern transfer layer 2 A fluoride compound layer 3 is formed on the outer surface 21 , so that the fluoride compound layer 3 , the pattern transfer layer 2 , and the metal roller 1 can jointly form the transfer roller 100 . In addition, the fluorine compound layer 3 is completely covered on the outer surface 21 of the pattern transfer layer 2 through evaporation, but the present invention is not limited thereto.

It should be noted that any coating (especially a metal layer) that is not composed of fluorine compounds is different from the fluorine compound layer 3 referred to in this embodiment. Furthermore, the fluorine compound layer 3 in this embodiment is preferably limited to a polytetrafluoroethylene (PTFE) layer, but the present invention is not limited to this.

Accordingly, through the selection of the characteristics of the ultraviolet optical film 200, the fluorine compound layer 3 can effectively separate the high-pressure contact forming surfaces between the two after rolling the ultraviolet optical film 200, and make the ultraviolet optical film 200 more compact. There is no possibility of mutual influence or appearance damage. To put it another way, the selection of the fluorine compound layer 3 and the ultraviolet optical film 200 has a mutual matching relationship.

In this embodiment, the curing ultraviolet light L2 irradiated on the transfer roller 100 can be reflected by the fluorine compound layer 3 by at least 70%, thereby effectively preventing the pattern transfer layer 2 from being affected by the curing ultraviolet ray L2 Damage or lysis caused by irradiation.

Furthermore, if the transfer roller 100 is irradiated (for a long time) by the curing ultraviolet light L2, cracks 22 may still occur on the outer surface 21 of the pattern transfer layer 2 . Among them, the outer surface 21 on which the cracks 22 are formed can maintain its shape through the fluorine compound layer 3 in this embodiment; that is to say, the fluorine compound layer 3 can be effectively joined at The area of the pattern transfer layer 2 next to the crack 22 is such that the fluorine compound layer 3 is still A predetermined appearance is provided to prevent the fluorine compound layer 3 from being distorted when the ultraviolet optical film 200 is rolled.

As mentioned above, in view of the fact that the fluorine compound layer 3 can not only prevent the pattern transfer layer 2 from being damaged by the curing ultraviolet ray L2, but also prevent the pattern transfer layer 2 from being damaged even if it is irradiated by the curing ultraviolet ray L2. Even if cracks 22 occur, the fluorine compound layer 3 can still maintain a predetermined appearance and avoid distortion of the transfer pattern.

[Embodiment 3]

Please refer to Figure 10, which is the third embodiment of the present invention. Since this embodiment is similar to the above-mentioned second embodiment, the similarities between the two embodiments will not be described in detail (such as the roller manufacturing step S100). The differences between this embodiment and the above-mentioned second embodiment are roughly described as follows. : In this embodiment, the transfer step and the curing step described in Embodiment 2 can be implemented simultaneously. Specifically, the curing light source S2 can be disposed below the ultraviolet optical film 200 , so that after the ultraviolet optical film 200 is rolled by the transfer roller 100 , it can immediately pass through the curing light source. The curing ultraviolet light L2 emitted by S2 is used for curing, thereby improving the overall production efficiency.

Furthermore, when the transfer step and the curing step are implemented simultaneously, it is more important to avoid distortion of the transfer pattern caused by the curing ultraviolet light L2 irradiating the transfer roller 100. Therefore, The fluorine compound layer 3 is therefore more necessary and irreplaceable.

[Technical effects of the embodiments of the present invention]

In summary, the ultraviolet optical film transfer method and the transfer roller manufacturing method using deep ultraviolet light disclosed in the embodiments of the present invention are limited by specific conditions (such as: the preset exposure wavelength is compared with the preset exposure wavelength). Assuming that the photocuring wavelength band is at least less than 100 nanometers), the pattern transfer layer can be made of ultraviolet exposure material, and the optical film rolled by the transfer roller can be cured by ultraviolet light. material, and the pattern transfer layer is less likely to be damaged by the influence of the curing ultraviolet rays, thereby effectively maintaining the roll forming accuracy of the transfer roller.

Furthermore, the ultraviolet optical film transfer method and the deep ultraviolet transfer roller manufacturing method disclosed in the embodiments of the present invention can also be formed by forming the fluorine compound layer, so that the fluorine compound layer can be formed at the rolling position. After the ultraviolet optical film is applied, the molding surfaces in high-pressure contact between the two can be effectively separated from each other, and there is less possibility of mutual influence or appearance damage.

Furthermore, in the ultraviolet optical film transfer method disclosed in the embodiment of the present invention, the fluorine compound layer used can not only prevent the pattern transfer layer from being damaged by the curing ultraviolet radiation (such as: The fluorine compound layer can be used to reflect at least 70% of the ultraviolet rays in the wavelength band between 350 nanometers and 410 nanometers that are irradiated on the transfer roller, and even if the pattern transfer layer is exposed to the curing ultraviolet rays, cracks will occur , the fluorine compound layer can still maintain a predetermined appearance and avoid distortion of the transfer pattern, thereby effectively maintaining the roll forming accuracy of the transfer roller.

The contents disclosed above are only preferred and feasible embodiments of the present invention, and do not limit the patent scope of the present invention. Therefore, all equivalent technical changes made by using the description and drawings of the present invention are included in the patent scope of the present invention. within.

S100: Roller manufacturing steps

S110: Coating process

S120: Patterning process

S200: Transfer step

S300: Curing step

Claims (6)

An ultraviolet optical film transfer method, which includes: implementing a roller manufacturing step: manufacturing a transfer roller and the manufacturing process includes: coating a photoresist layer on the outer surface of a metal roller; applying a photoresist layer with a preset exposure wavelength A deep ultraviolet (DUV) forms a predetermined light shape through a photomask or interference, and then irradiates the photoresist layer, so that the photoresist layer forms a pattern transfer layer; wherein, the pattern transfer layer The printing layer and the metal roller together constitute the transfer roller; wherein the metal roller is a chromium metal roller or a copper metal roller, and no nickel metal material is used in the roller manufacturing step; a transfer is performed Printing step: Use the transfer roller to continuously roll on an ultraviolet optical film; wherein the ultraviolet optical film can be irradiated and cured by ultraviolet light whose wavelength falls within a preset light curing band, and the The preset exposure wavelength of deep ultraviolet rays falls outside the preset photocuring wavelength band, and the preset exposure wavelength is at least less than 100 nanometers compared to the preset photocuring wavelength band; and a curing step is performed. : Use a curing ultraviolet light whose wavelength falls within the preset light curing band to irradiate and cure the ultraviolet optical film rolled by the transfer roller. The ultraviolet optical film transfer method according to claim 1, wherein the preset exposure wavelength is between 190 nanometers (nm) and 250 nanometers, and the preset photocuring wavelength band is between 350 nanometers and 410 nanometers. Nano. The ultraviolet optical film transfer method according to claim 1, wherein in the roller manufacturing step, a fluorine compound layer is formed on the outer surface of the pattern transfer layer; wherein, the fluoride compound layer, The pattern transfer layer, and the The metal rollers together constitute the transfer roller. The ultraviolet optical film transfer method according to claim 3, wherein in the roller manufacturing step, the fluorine compound layer is completely covered with the pattern transfer layer by evaporation. On the outer surface, the fluorine compound layer is further defined as a polytetrafluorothene (PTFE) layer. The ultraviolet optical film transfer method according to claim 3, wherein in the curing step, the transfer roller is irradiated by the curing ultraviolet light, so that the outer surface of the pattern transfer layer Cracks are generated; wherein the outer surface on which the cracks are formed maintains its shape by the fluorine compound layer. The ultraviolet optical film transfer method according to claim 3, wherein in the curing step, the curing ultraviolet rays irradiated on the transfer roller can be reflected by the fluorine compound layer by at least 70%.

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