TWI679462B - Spacer for camera lens with reduced halo phenomenon and manufacturing method thereof - Google Patents

Abstract

The invention relates to a spacer for a camera lens with reduced halo phenomenon and a method for manufacturing the same. The spacer includes a film substrate and a light-shielding layer coated on both sides of the film substrate. The light-shielding layer includes an undercoat layer and a mixture of 10 to 25 parts by weight of a lubricant for 100 parts by weight of a polyurethane-based adhesive and 3 to 5 parts by weight of a black oiliness. A black coating applied on the surface of the undercoat layer with a dye, 200 to 300 parts by weight of an organic solvent, penetrates the film substrate and the light-shielding layer to form a hollow portion to advance the light to the camera lens, and induces a halo phenomenon. The inner surface of the hollow portion was subjected to an etching treatment with an alkaline solution. The manufacturing method of the spacer includes a first coating step for forming an undercoat layer, a second coating step for forming a black coating layer, a perforation step, an etching step for corroding the inner surface of a hollow portion of a film substrate, and a drying step.

Description

Spacer for camera lens with reduced halo phenomenon and manufacturing method thereof

The present invention relates to a spacer for a camera lens with reduced flare phenomenon and a method for manufacturing the same. More specifically, the present invention relates to a spacer for a camera lens and a method for manufacturing the same, which reduces the halo phenomenon by minimizing the reflection of light by corroding the inner surface of the hollow portion of the film substrate.

Headed by the popularization of the so-called camera phone, a new concept that combines digital camera technology and mobile phone technology, smartphones that have network functions have become popular in recent years.

The miniaturization and weight reduction of camera modules such as mobile phone cameras, compact cameras, and video cameras is being continuously carried out. In this regard, light-shielding members such as shutters, apertures, and spacers, which are mainly made of metal, are being made lighter. The molecular membrane is replaced.

Here, a spacer is made by donuting a film in the shape of a donut in order to maintain the interval between a plurality of lenses and adjust the resolution of all lens units. It is also called IRIS, MASK, or light-shielding film.

As an example of such a spacer, Registered Patent No. 10-1592829 ("Conductive Black Film for Mobile Camera Lens") discloses a spacer in which a black material is coated on both surfaces of a black film substrate. Japanese Laid-Open Patent No. 10-2017-0096661 ("A spacer for a camera lens unit and a method for manufacturing the spacer") discloses a method for forming on a PET film substrate. Spacer for additional coating mode for shading.

However, when a spacer using such a film base material of plastic material is formed on the surface of the hollow portion in the process of forming the hollow portion, there is a problem that a halo phenomenon occurs as follows: light entering through the lens is on the film base The exposed surface of the material is reflected, and a round outline is generated around a high-luminance object such as the sun appearing on the captured image, or the captured image is blurred like fog as a whole. That is, the captured image is completely different from what you see with your eyes.

In order to solve the above-mentioned problem, Japanese Laid-Open Patent No. 10-2017-0096661 discloses a method in which a film substrate further includes beads for preventing internal reflections, and a cross section of a hollow portion exposed when a hole of a spacer is processed is exposed Beads for preventing internal reflections minimize the reflection of light. However, since the reflection of light cannot be avoided in the remaining areas that do not include the beads for preventing surface reflection, the prevention of halo is limited.

[Prior technical literature]

[Patent Literature]

Patent Document 0001: Republic of Korea Registered Patent No. 10-1592829 (registered on February 05, 2016, Invention name: conductive black film for mobile camera lens).

Patent Document 0002: Republic of Korea Registered Patent No. 10-2017-0096661 (Published on August 25, 2017, Invention Name: Spacer for Camera Lens Unit and Method for Manufacturing the Spacer).

Therefore, the problem to be solved by the present invention is to solve the problems of the above-mentioned prior art, to provide all of the required performances such as light-shielding property, gloss-removing property, and adhesiveness, and to be able to fit inside the hollow portion of the film substrate that induces the halo phenomenon A spacer for a camera lens in which the side surface is collectively corroded and reduced in a halo phenomenon, and a method for manufacturing the same.

In order to achieve the above object, a spacer for a camera lens with reduced halation according to the present invention is characterized in that it comprises a film substrate (100) made of a plastic material and light-shielding layers (on both sides of the film substrate) 200). The light-shielding layer (200) includes an undercoat layer (210) and a black coating layer (220). The undercoat layer (210) is used for the first time to improve the adhesion of the surface of the film substrate (100). The black coating layer (220) is a mixture of 100 to 25 parts by weight of a polyurethane-based adhesive, 10 to 25 parts by weight of a lubricant, 3 to 5 parts by weight of a black oily dye, and 200 to 300 parts by weight of an organic compound. It is formed by coating the surface of the undercoat layer (210) for the second time with a solvent, penetrating the film substrate (100) and the light-shielding layer (200) to form a hollow portion (H) to advance the light toward the camera lens. The inner side surface (H1) of the hollow portion of the film substrate (100) that induces the halo phenomenon has been subjected to an etching treatment with an alkaline solution. The lubricant is the first to 100 parts by weight of particles having a first average particle size. One lubricant is composed of 150 to 250 parts by weight of particles having a second average particle diameter larger than the first average particle diameter. Compound 2 slip agent slip agent, in the black coating The surface of the layer (220) is formed with a charged coating layer (230), and the charged coating layer (230) is a third application of a conductive substance.

In the spacer for a camera lens in which the halo phenomenon is reduced according to the present invention, the alkaline solution is prepared by adding ethylene diamine (Ethylenediamine) at a predetermined ratio to a fixed concentration sodium hydroxide aqueous solution, and the film substrate (100) is a polyethylene terephthalate (PET), which is a kind of thermoplastic plastic. With the alkaline solution, the film substrate (100) is corroded more than the light-shielding layer (200).

In order to achieve the above object, the method for manufacturing a spacer for a camera lens with reduced halation according to the present invention is characterized by including the following steps: a first coating step (S1), and a plastic film substrate (100) Primer coating solution is applied on both sides to form an undercoat layer (210); in the second coating stage (S2), a functional coating is applied to the surface of the above undercoat layer to form a black coating layer (220). Based on 100 parts by weight of a polyurethane-based adhesive, 10 to 25 parts by weight of a lubricant, 3 to 5 parts by weight of a black oily dye, and 200 to 300 parts by weight of an organic solvent are formed; the perforation stage (S3), The film substrate (100) after the second coating is cut in the shape of a spacer having a hollow portion (H); in the corrosion stage (S4), the cut film substrate (100) is alkaline at a fixed temperature Immersion in the solution for a fixed time to corrode the inside surface (H1) of the hollow portion of the film substrate (100) that induces the halo phenomenon; and in the drying stage (S5), the corroded film substrate (100) is washed with water and then dried For a fixed time, in the first coating step (S1), the film substrate (100) is used as a thermoplastic. A polyethylene terephthalate (polyethylene terephthalate; PET), is coated in the second time stage (S2), the aforementioned The lubricant is prepared by mixing 150 to 250 parts by weight of a first lubricant composed of particles having a first average particle diameter and 100 to parts by weight of particles having a second average particle diameter larger than the first average particle diameter. The two-lubricant composite lubricant further includes a third coating step (S6), which is performed in the second coating step (S2), and a conductive material is applied to the black coating (for the third time) 220), a charged coating layer (230) is formed on the surface, and in the above-mentioned corrosion stage (S4), the alkaline solution is prepared by adding ethylenediamine at a predetermined ratio in a fixed concentration sodium hydroxide aqueous solution.

According to the spacer for a camera lens and a method for manufacturing the same, in which the halo phenomenon is reduced, the inside of the hollow portion of the film substrate that is vulnerable to the reflection of light is curvedly corroded toward both sides, so that a significant reduction can be obtained. The effect of high-quality spacers with the halo phenomenon.

In addition, by using a specific alkaline solution that can selectively etch the film substrate, the present invention has all the properties that can meet the requirements of light shielding, gloss removal, adhesion, etc., and effectively blocks the halo phenomenon. advantage.

In particular, by forming an undercoat layer between the film substrate and the black coating layer, the black coating layer can be prevented from peeling off during the corrosion process, and by using a composite lubricant, two effects can be obtained with one component at the same time ( Sliding and matt).

100‧‧‧ film substrate

200‧‧‧ shading layer

210‧‧‧undercoat

220‧‧‧ black coating

230‧‧‧ charged coating

L‧‧‧light

H‧‧‧Hollow

H1‧‧‧ Inner side of hollow section

FIG. 1 is a schematic view showing reduced light in an embodiment of the present invention. A cross-sectional view of a spacer for a camera lens with a halo phenomenon.

FIG. 2 is a view showing that the film substrate included in the spacer of FIG. 1 is severely corroded by an alkaline solution.

FIG. 3 is a diagram for explaining a principle of reducing a halo phenomenon by the spacer of FIG. 1.

FIG. 4 is a flowchart schematically showing a method of manufacturing a spacer for a camera lens with reduced halo phenomenon according to an embodiment of the present invention.

FIG. 5 is a diagram showing a comparison of a halo test result of a spacer according to an embodiment of the present invention.

Hereinafter, the embodiment of the spacer for a camera lens and a method of manufacturing the same for reducing a halo phenomenon according to the present invention will be described in detail. When it is determined that the description of the known technology related to the present invention makes the gist of the present invention unclear, the detailed description of the known technology is omitted.

FIG. 1 is a diagram schematically showing a cross section of a spacer for a camera lens in which the halo phenomenon is reduced according to an embodiment of the present invention. FIG. 2 is a diagram showing that a film substrate included in the spacer in FIG. FIG. 3 is a diagram for explaining the principle of reducing the halo phenomenon by the spacer of FIG. 1, and FIG. 4 is a schematic view showing a camera lens with reduced halo phenomenon according to an embodiment of the present invention. A flowchart of a method of manufacturing a spacer. FIG. 5 is a diagram showing a comparison of a halo test result of a spacer according to an embodiment of the present invention.

1 to 5, a reduction of one embodiment of the present invention The spacer for a camera lens with a halo phenomenon minimizes reflection of light by corroding the inner surface of the hollow portion of the film substrate. The spacer includes a film substrate (100) and a light-shielding layer (200). The manufacturing method of the spacer includes a first coating step (S1), a second coating step (S2), a piercing step (S3), a corrosion step (S4), and a drying step (S5).

In order not to repeat the description, the configuration of the spacer and its corresponding manufacturing stages will be described together.

As for the film substrate (100), as a material having a film shape with a thickness of about 20 to 30 μm, a transparent, low-cost, and excellent processability PET, PA, PC, PI, PMMA, or TAC film (tri- Material of film substrate (100) such as acetyl-cellulose film.

The film substrate (100) functions to reduce the weight of the spacer and maintain strength and rigidity.

The light-shielding layer (200) is a layer coated on both sides of the film substrate (100) as shown in FIG. 1 or FIG. 5, and is configured to include an undercoat layer (210) and a black coating layer (220).

First, the undercoat layer (210) is formed by the following first coating step (S1): an undercoat liquid is applied to both sides of the film substrate (100) to a thickness of about 1 μm to form an undercoat layer ( 210).

PE, PP and other plastics have low surface energy and therefore exhibit unique hydrophobicity (low wettability). Such hydrophobicity is a factor that reduces the adhesion between the plastic and the adhesive. Therefore, in order to improve the adhesion of the coating, it is necessary to improve the wettability of the plastic surface in advance.

The primer solution has the following characteristics: it is easy to form hydrogen with the film substrate Since the bonds have a small molecular size, they penetrate well into the porous film substrate, and form covalent bonds between the film substrates. Therefore, the undercoat layer (210) functions as an adhesive medium that improves the bonding force between the surface of the hydrophobic film substrate (100) and the black coating layer (220).

The black coating layer (220) is a layer that functions to selectively block light entering through the camera lens. The black coating layer (220) of this embodiment is formed by applying a functional coating on the surface of the undercoat layer (210) in the second coating step (S2). The functional coating is for 100 parts by weight. Polyurethane-based adhesives are made by mixing 10 to 25 parts by weight of a lubricant, 3 to 5 parts by weight of a black oily dye, and 200 to 300 parts by weight of an organic solvent.

The adhesive (liquid phase resin) plays a basic role in forming a coating film with strong physical properties (weather resistance, corrosion resistance, chemical resistance, etc.) on the undercoat layer (210), and also provides a lubricant. And the dispersibility of black oily dyes. At this time, as an adhesive force strengthening means for preventing peeling of the black coating layer (220) in the corrosion stage (S4) described later, it is preferable to use a polyurethane series similar to the chemical structure of the undercoat layer (210) as the adhesive. .

The lubricant can be used as an element added to provide the blackness of the surface of the black coating (220). Polytetrafluoroethylene (PTFE), polytrifluorochloroethylene (PCTFE), polyvinylidene fluoride (PVDF), and polyvinyl fluoride can be used. (PVF), ethylene-tetrafluoroethylene copolymer (ETFE), and the like.

Here, the lubricant can be used by mixing 100 to 250 parts by weight of a first lubricant composed of particles having a first average particle diameter of 1 to 5 μm, and mixing 150 to 250 parts by weight of 6 to 10 μm having a larger average particle diameter. A second lubricant composed of particles of a second average particle size.

The first lubricant having small particles is distributed between the second lubricants, and plays a role of imparting matteness (matte) to the black coating layer (220). The second lubricant having large particles is on the surface of the black coating layer (220). Partially exposed, it functions to provide the sliding properties of the black coating (220).

Based on 100 parts by weight of a polyurethane-based adhesive, if the content of the lubricant is less than 10 parts by weight, the sliding properties will decrease. If the content of the lubricant exceeds 25 parts by weight, the adhesiveness of the adhesive and the characteristics of the remaining components will be reduced. Will decrease.

The black oil-based dye, as an oil-based dye-based colorant, exerts a function of imparting light-shielding properties and black sensitivity to the black coating layer (220). Black oily dyes are white or colored inorganic and organic compounds that are insoluble in media such as organic solvents. They are particulate dyes. They are dispersed / colored finely with a binder to give a beautiful color to the black coating (220).

If the content of the black oily dye is less than the above-mentioned lower limit value, the light-shielding property and black sensitivity of the black coating (220) will decrease. If it exceeds the above-mentioned upper limit value, the adhesiveness of the adhesive and the characteristics of the remaining components will decrease. .

A highly volatile organic solvent (Solvent) is used to adjust the appropriate viscosity of the functional coating. It will evaporate after coating and will not remain in the coating film. If the content of the organic solvent is less than the above lower limit, the coating quality will decrease due to the excessive viscosity of the functional coating. If the content of the organic solvent exceeds the above upper limit, the adhesiveness of the adhesive and the characteristics of the remaining components Will decrease.

The third coating step (S6) can be performed after the second coating step (S2). The third coating stage (S6) is to prevent Step of applying a conductive substance to the surface of the black coating layer (220) for the third time to form a charged coating layer (230).

The subsequent perforation step (S3) is a step of cutting the film including the film base material (100) and the light-shielding layer (200) into a spacer shape. In this stage, a hollow portion (H) is formed so as to allow light to be directed toward the camera lens.

In this process, the inner surface (H1) of the hollow portion of the film substrate (100) that induces the halo phenomenon is exposed. In order to deal with the inner surface (H1) of the hollow portion that adversely affects the image quality, an etching step is performed (S4).

The corrosion stage (S4) is a process in which a plurality of film substrates (100) cut in the shape of a spacer are immersed in an alkaline solution having a fixed temperature for a fixed time to etch the inner side (H1) of the hollow portion of the film substrate (100). stage.

In order to make the inner side (H1) of the hollow portion of the film substrate (100), which is a direct cause of the halo phenomenon, more corroded than the light-shielding layer (200), the above-mentioned alkaline solution is a 10-25% concentration sodium hydroxide aqueous solution. It is produced by adding ethylenediamine at a predetermined ratio (preferably a ratio of 10: 1).

The reason why the film substrate (100) corrodes more than the light-shielding layer (200) is presumably that the above-mentioned alkaline solution concentratedly reacts with the film substrate (100) having relatively more voids than the light-shielding layer (200) and having low wettability.

At this time, when the concentration of the sodium hydroxide aqueous solution is lower than the reference, the treatment temperature is 60 ° C or lower, or the immersion time is less than 10 minutes, the corrosion cannot be performed efficiently. On the contrary, the concentration of the sodium hydroxide aqueous solution is higher than the reference and the processing temperature is When the temperature is above 80 ° C or the immersion time exceeds 60 minutes, the corrosion progresses excessively, and the physical properties of the light-shielding layer (200) are reduced. good.

If an ordinary alkaline solution that is not an alkaline solution capable of being selectively etched as in this embodiment is used, although the film substrate (100) and the light-shielding layer (200) cause similar corrosion to prevent the halo phenomenon, but The remaining required performance including light-shielding properties is reduced, which is not preferable.

In this etching step (S4), the inner side surface (H1) of the hollow portion of the film base material (100) is corroded and curved to both sides as shown in FIG. 2, and the surface is roughened.

In this case, as shown in FIG. 3, the light (L) entering through the lens is scattered by the inner surface (H1) of the hollow portion of the film substrate (100) that has been roughened, and the light is blocked for the first time. In addition, the inner surface (H1) of the hollow portion is corroded in a curved shape, and therefore, the light path collides with the inner surface (H1) of the hollow portion at an incident angle at which reflection cannot be reflected. Therefore, the light does not advance toward the image sensor side, and a part of the light is reflected in the opposite direction, so that a halo phenomenon does not occur.

In the conventional spacer, the surface of the hollow portion of the film base material exposed during the formation of the hollow portion is not etched, so the following halo phenomenon frequently occurs: due to the light reflected on the exposed surface of the film base material, A round outline is generated, and the entire image is blurred like fog.

According to the present invention, the inner surface (H1) of the hollow portion of the film base material (100) is collectively corroded, so that the existing halo phenomenon can be solved, and the effect of providing a high-quality spacer can be obtained.

After the etching step (S4) is completed, as shown in FIG. 4, the etched film substrate (100) is washed with water, and the drying step (S6) is performed for 10 to 60 minutes to complete the manufacture of the spacer.

In short, the spacer as an auxiliary member of the camera lens basically requires strong adhesion, abrasion resistance, sliding property, light shielding property, matte property, electrification property, and ability to prevent halo phenomenon. The present invention satisfies the above-mentioned requirements by close combination as follows.

1) Adhesiveness: primer, polyurethane-based adhesive.

2) Abrasion resistance: Polyurethane-based adhesives using specific alkaline solutions.

3) Sliding property: The second lubricant is a specific alkaline solution.

4) Light-shielding property: black oily dye.

5) Matte: black oily dye, first lubricant, using specific alkaline solution.

6) Chargeability: Charged coating.

7) Ability to prevent halo phenomenon: The film substrate is corroded and bent to both sides, and a specific alkaline solution is used.

Hereinafter, specific examples of the present invention will be described, and the recognition of each evaluation item and the results of self-evaluation will be described.

[Example 1]

1. First, the polyurethane series resin, the isocyanate series curing agent, the retarder that hinders the intense reaction between the curing agent and the resin are mixed at a fixed ratio, and they are stirred at a speed of about 500 RPM for more than 30 minutes to prepare A primer solution was prepared, and the primer solution was applied to a PET film substrate having a thickness of 0.25 μm for the first time.

At this time, as for the coating method, as a solution filled in the mesh voids of the screen roll is transferred onto the film and applied, a micro gravure coating capable of coating a film of 1 μm or less with relatively small thickness deviation is used. Overlay (Micro Gavure Coating). In this embodiment, M200 Mesh manufactured by Media Engineering is used.

2. Next, a functional coating was applied to the surface of the undercoat layer at a thickness of about 4 μm for a second time by a micro gravure coating method to form a black coating layer (220). The functional coating is 100 parts by weight of polyurethane. Based on the binder, 15 parts by weight of an amorphous lubricant, 4 parts by weight of a black oily dye, and 250 parts by weight of an organic solvent were mixed. Here, the lubricant is a lubricant obtained by mixing polytetrafluoroethylene (PTFE) having different average particle diameters of 5 μm and 10 μm at a ratio of 1: 2, and methyl ethyl ketone (MEK) is used as an organic solvent.

3. Using the micro gravure coating method described above, the ING-45PJ solution of the CNT emulsion series made by ENG Soft was coated on the black coating (220) with a thickness of 0.1 μm to form a charged coating (230).

4. The coated film was cut in the shape of a spacer having a hollow portion (H), and it was immersed in an alkaline solution at 70 ° C for 20 minutes. The basic solution was a 20% strength sodium hydroxide aqueous solution. 10: 1 ratio is made by adding ethylene diamine (Ethylenediamine).

5. Wash and dry the corroded spacer to complete the manufacture of the spacer.

For the strong adhesion (surface roughness), abrasion resistance (surface resistance), and matteness (gloss) of the spacers made in this way, Korea, which commissioned an internationally recognized test organization as described in <Annex 1> The Polymer Test Institute Co., Ltd. tested whether the product meets the minimum requirements.

As a result, it was confirmed that the surface roughness of the spacer of this example is 0.435 (μm) and the surface resistance are described in the following table. 2.33 * 10 ^ 7 (Ω / sq), gloss 0.3, which meets the minimum requirements.

In addition, in order to confirm the anti-halo phenomenon ability of the spacer of Example 1, a halo test was performed.

[Comparative Example 1]

The steps from 1. to 3. are performed in the same manner as the steps from 1. to 3. in the above-mentioned Example 1. 4. The coated film is cut into a spacer shape having a hollow portion (H), thereby completing the spacer. Manufacturing.

The halo test was performed in the following manner: The spacers of the above-mentioned Example 1 and the above-mentioned Comparative Example 1 were separately installed on a Samsung Galaxy S7 smartphone module, and LED light was used to illuminate the strong light in a dark room, and actual shooting was performed at various angles. To confirm whether halo appears on the captured image.

As a result, as shown on the left side of FIG. 5, in the image captured by the smartphone equipped with the spacer of Example 1, since the light spreads evenly to the periphery of the light source, there is no halo phenomenon. As shown on the right, an image taken by the smartphone of the spacer of Comparative Example 1 shows an unidentified purple portion, and a visible phenomenon of a halo phenomenon, in which light is scattered randomly around the light source, is shown. . From this, it can be inferred that whether the inner surface (H1) of the hollow portion of the film base material (100) is corroded will directly affect the occurrence of the halo phenomenon.

The above-mentioned spacer for a camera lens with reduced halo of the present invention and a method for manufacturing the same, by corroding the inside of the hollow portion of the film substrate that is vulnerable to the reflection of light to both sides, can obtain a significant reduction that can be provided. The effect of high-quality spacers with the halo phenomenon.

In addition, by using a characteristic alkaline solution that can selectively etch a film substrate, the present invention has all of the required properties such as light shielding, gloss removal, and adhesion, and effectively blocks the halo phenomenon. advantage.

In particular, by forming an undercoat layer between the film substrate and the black coating layer, the black coating layer can be prevented from peeling off during the corrosion process, and by using a composite lubricant, two effects can be obtained with one component at the same time ( Sliding and matt).

The scope of protection claimed by the present invention is not limited to the above-mentioned embodiments and modifications, and can be embodied in various forms of embodiments within the scope of protection claimed. Without departing from the gist of the present invention claimed by the present invention, various scopes that can be deformed by a person having ordinary knowledge in the technical field to which this application belongs are also included in the claimed scope of the present invention.

Claims (3)

A spacer for a camera lens with reduced halo, comprising a film substrate (100) made of a plastic material and light-shielding layers (200) coated on both sides of the film substrate; the light-shielding layer (200) includes The undercoat layer (210) and the black coating layer (220). The undercoat layer (210) is applied for the first time in order to improve the adhesion of the surface of the film substrate (100). The black coating layer (220) 100% by weight of a polyurethane-based adhesive is mixed with 10 to 25 parts by weight of a lubricant, 3 to 5 parts by weight of a black oily dye, and 200 to 300 parts by weight of an organic solvent. The surface of the coating (210); the film substrate (100) that penetrates the film substrate (100) and the light-shielding layer (200) to form a hollow portion (H) to advance the light to the camera lens and induce a halo phenomenon The inside surface (H1) of the hollow portion (H1) of (100) has been subjected to corrosion treatment with an alkaline solution; the lubricant is mixed with 150 to 250 parts by weight of 100 parts by weight of a first lubricant composed of particles having a first average particle diameter. A composite lubricant of a second lubricant composed of particles having a second average particle diameter larger than the first average particle diameter; A surface layer (220) is formed with a charged coating layer (230), the charged coating (230) is a third conductive material formed by coating. The spacer for a camera lens in which the halo phenomenon is reduced as described in claim 1, wherein the alkaline solution is prepared by adding ethylenediamine at a predetermined ratio in a fixed concentration sodium hydroxide aqueous solution; the film base The material (100) is polyethylene terephthalate (PET), which is a kind of thermoplastic plastic; with the aforementioned alkaline solution, the film substrate (100) is corroded more than the light-shielding layer (200). A method for manufacturing a spacer for a camera lens with reduced halo, including the following steps: a first coating step (S1), applying a primer solution on both sides of a plastic film substrate (100) to form a primer Coating layer (210); in the second coating stage (S2), a functional coating is applied on the surface of the aforementioned undercoat layer to form a black coating layer (220). The aforementioned functional coating is based on 100 parts by weight of a polyurethane system. The binder is made by mixing 10 to 25 parts by weight of a lubricant, 3 to 5 parts by weight of a black oily dye, and 200 to 300 parts by weight of an organic solvent. The perforation stage (S3) is performed after the second coating. The film base material (100) is cut in the shape of a spacer having a hollow portion (H); in the corrosion stage (S4), the cut film base material (100) is dipped in an alkaline solution having a fixed temperature for a fixed time to induce the The inside surface (H1) of the hollow portion of the film base material (100) with a halo phenomenon is corroded; and in the drying stage (S5), the corroded film base material (100) is washed with water and then dried for a fixed time; in the first time In the coating stage (S1), the film substrate (100) is a poly (terephthalic acid) which is a kind of thermoplastic plastic. Diester (PET); in the second coating stage (S2), the lubricant is mixed with 150 to 250 parts by weight of 100 parts by weight of the first lubricant composed of particles having a first average particle size. A composite lubricant of a second lubricant composed of particles having a second average particle diameter larger than the first average particle diameter; the manufacturing method further includes a third coating step (S6), which is performed during the second coating. In the coating step (S2), a conductive substance is applied to the surface of the black coating layer (220) for the third time to form a charged coating layer (230). In the corrosion step (S4), the alkaline solution is It is prepared by adding ethylenediamine to a predetermined concentration of an aqueous sodium hydroxide solution at a predetermined ratio.