JP4875858B2 - Manufacturing method of lens for semiconductor optical element - Google Patents

Description

  The present invention relates to a method for manufacturing a lens, particularly a resin lens for a semiconductor optical element, and in particular, when a lens is manufactured by using a mold, the lens is caused by sink marks due to curing shrinkage of a lens resin material or mixing of bubbles. The present invention relates to a manufacturing method for preventing a defective portion from being generated.

  A light emitting diode (LED: Light Emitting Diode) is a semiconductor light emitting element that emits light, and converts electrical energy into ultraviolet light, visible light, infrared light, and the like. For example, a device using visible light includes a semiconductor light emitting element formed of a light emitting material such as GaP, GaAsP, or GaAlAs, and an LED lamp in which these are sealed with a transparent resin or the like is widely used. In addition, a display-type LED lamp in which a light emitting material is fixed on the upper surface of a printed circuit board or a metal lead and sealed with a transparent resin case shaped like a number or letter is also frequently used.

  In addition, since the light emitting diode is a semiconductor element, it has a long life, high reliability, and when used as a light source, the replacement work can be reduced. Therefore, portable communication devices, personal computer peripheral devices, OA devices, home use It is widely used as a component of various display devices such as electric devices, audio devices, various switches, backlight light sources, and bulletin boards. In addition, LED lamps are attracting attention as a backlight illumination light source for in-vehicle device displays, and are used for backlight illumination in displays such as meters, heater control panels, and audio, especially in the white or blue-green region. There is a need for LED lamps that emit light.

In the LED lamp, depending on the purpose of use, a condensing lens for regulating the traveling direction of the emitted light may be provided on the sealing material (see Patent Document 1 below). As a method for producing such a condensing lens, as shown in FIG. 5, in general, a liquid lens resin is filled into a mold having a concave portion in the shape of a lens by compression molding (compression molding), and the upper mold It is made to pressurize by, heat-harden, take out from a metal mold | die after cooling. At this time, a defect portion may be formed on the bottom surface of the lens or the like due to sink marks due to curing shrinkage of the liquid lens resin, mixing of bubbles, or the like (see Patent Document 2 below). Therefore, the present inventors do not use the upper mold, but in the mold of only the lower mold, when the liquid lens resin is filled and heat-cured, the lens bottom surface is released, so that bubbles are mixed in. It has been proposed to prevent the occurrence of missing parts (see Patent Document 3 below). However, in molding by such an open system, the lens bottom surface becomes spherical due to surface tension, and it is difficult to manufacture a specification that requires flattening of the lens bottom surface.
Japanese Patent Laid-Open No. 3-119769 JP-A-8-99368 Japanese Patent Application No. 2003-70210

  The present invention has been made in view of the above circumstances, and in a manufacturing method by compression (molding) of a lens, a defect portion is formed on a lens bottom surface or the like due to contamination of bubbles or bubbles due to heat shrinkage caused by heat curing of a lens resin material. An object of the present invention is to provide a method for manufacturing a lens that prevents the lens from being formed and has a flat bottom surface.

  As a result of diligent study to solve the above problems, the present inventor, in the manufacturing method by compression (compression) molding of the lens, by using a flake material instead of the upper mold as shown in FIG. When the molding material is cured and shrunk, the resin film is deformed following the molding material in contact with the molding material, so that it is possible to prevent sink marks or air bubbles from entering, and to prevent the occurrence of defects on the lens bottom surface. I found that I can do it.

  Further, at this time, as shown in FIG. 1B, by interposing a thin piece material between the lower mold and the upper mold, it is possible to prevent sink marks or bubbles from being mixed in the bottom surface of the lens. It is possible to prevent the occurrence of a defective part.

The specific configuration of the present invention is as follows.
(1) A method of manufacturing a lens, in which a liquid resin material for a lens is filled in the cavity recess of a mold having a cavity recess, and at least the lens resin material filled in the cavity recess of the mold is exposed. A method for producing a lens, wherein the surface is covered with a thin piece material (covered with a thin piece material so as to cover the surface of the lens resin material), and then the resin material is heated and cured.
(2) The method for manufacturing a lens according to (1), wherein the thin piece material is interposed between a lower mold and an upper mold of the mold.
(3) The method for producing a lens according to (1) or (2), wherein the flake material is a heat-resistant resin film having a heat deformation temperature of 90 ° C. or higher.
(4) The method for producing a lens according to (3), wherein the resin film is a polyethylene terephthalate (PET) film.
(5) The manufacturing method of the lens in any one of said (1)-(4) whose thickness of the said resin film is 10-500 micrometers.
(6) The method for producing a lens according to any one of (1) to (4), wherein the lens resin material is a silicone resin, and the paper is a silicone-treated release paper.
(7) The method for manufacturing a lens according to any one of (1) to (6), wherein a mold having a plurality of cavity recesses is used.
(8) Among the plurality of cavity recesses, the cavity recess located at one end of the mold is filled with a greater amount of lens resin material than the cavity recess located at the other part, and the cavity recess at the one end The method for producing a lens according to (7), wherein the lens is covered with a resin film while venting air toward the other end.
(9) The method for manufacturing a lens according to any one of (1) to (8), wherein the semiconductor optical element is a light emitting diode.
(10) The method for producing a lens according to any one of (1), (2), and (6) to (9), wherein a thin piece material is adhered or adhered to the resin lens material to cover the resin lens material. .
(11) The method for producing a lens according to (10), wherein a resin film that has been subjected to a treatment for improving adhesion or adhesiveness in advance is used as the flake material.
(12) The resin for a semiconductor optical element according to the above (11), wherein the treatment for improving the adhesion or adhesion to the resin film or paper is a treatment for changing the surface state or a surface modification treatment.
(13) The method for producing a lens according to (12), wherein the treatment for changing the surface state is silicone treatment, primer treatment or satin treatment, and the surface modification treatment is ultraviolet treatment, ozone treatment, corona treatment or plasma treatment. .
(14) In any one of the above (1), (2), and (7) to (10), wherein the flake material contains one or more of resin film, paper, metal, rubber, leather or fiber The manufacturing method of the lens of description.
(15) The method for producing a lens according to any one of (1) to (14), wherein the lens is a resin lens for a semiconductor optical element.
(16) A lens manufactured by the manufacturing method according to any one of (1) to (15), wherein the surface shape of the thin piece material is transferred to the surface.

  As a shaping | molding die of this invention, the shaping | molding die 2 as shown by FIG. 1 (A) and (B) is mentioned, for example. In the figure, 2 is a mold, and a cavity recess 21 is formed on the upper surface 22 thereof. In this case, the cavity recess 21 has a shape including a disc-shaped recess 211 and a cross-sectional arc-shaped recess 212 formed at the lower center of the disc-shaped recess 211. The wall surface 212 is a convex surface that serves as a condensing surface of the lens, and the cavity concave portion 21 is filled with a liquid lens resin material.

In the present invention, a thin piece material can be used as a material for covering the exposed surface of the lens resin material. In the present specification, the “thin material” means a material having a shape of a film or a sheet having a thickness of about 1 mm or less. Examples of the material include, but are not limited to, one or more of resin film, paper, metal, rubber, leather, or fiber. These materials can be used alone or in combination of two or more. Among these flake materials, heat-resistant and flexible materials are preferable in terms of production efficiency. Moreover, the resin film or paper is advantageous in terms of the cost of the material itself, and the metal is advantageous in that it can be reused.
The resin film is preferably a resin film that can withstand the heating of the lens resin material and has flexibility, and examples thereof include conventionally known polyethylene terephthalate (PET), polyimide resin, polycarbonate resin, polyester resin, fluororesin, A resin film such as a cyclic olefin resin, silicon rubber, or EPDM can be used. More preferably, a heat resistant resin film having a heat distortion temperature of 90 ° C. or higher is used, and a PET film is particularly preferably used. The PET film is typically produced by a biaxial stretching method.
The paper used as a thin piece material for covering the exposed surface of the lens resin material is preferably a paper that can withstand the heating of the lens resin material and has flexibility. Further, paper having a release material treated on its surface is preferable because it easily peels after molding of the resin lens. Examples of the release material include dimethyl silicone, phenyl silicone, and fluorine, and dimethyl silicone is preferable.
Stainless steel, brass, aluminum and iron are used as the flake material, silicone rubber is used as rubber, EPDM, fluoro rubber, NBR is used as cowhide and pig skin as leather, and cotton, silk and nylon fibers are used as fibers. Polyester fibers are exemplified.

  Of the flake material, the thickness of the resin film is appropriately determined depending on the type of resin, but if it is thin, it can be deformed following the shrinkage of the material. Will be easy to prevent. On the other hand, when the film is thick, the flatness of the film can be maintained, so that no undulation occurs, which contributes to the flattening of the lens bottom surface. For example, in the case of a PET film, it has been found that a thickness of 10 to 500 μm is preferable, a thickness of 10 to 100 μm is more preferable, and a thickness of 50 to 100 μm is most preferable and suitable.

  In addition, a lens can be manufactured by forming a plurality of cavity recesses in the mold used in the present invention and filling each cavity recess in order or using a plurality of quantitative supply devices at once. . At that time, among the plurality of cavity recesses, the cavity recess located at one end of the mold is filled with a larger amount of the resin material for the lens than the cavity recess located at the other part, and from the cavity recess at the one end. Covering with a thin piece material such as a resin film while venting air toward the other end, a plurality of resin lenses can be manufactured at one time without mixing of bubbles. In addition, when a PET film is used, since the film is transparent, it can be covered with the film while confirming the presence or absence of entrainment of bubbles, so that bubble defects can be prevented.

  In the present invention, since the resin material for the lens is not compressed during molding, any of metal, resin, and rubber can be used as the mold, but heat conduction during heat curing or cooling is possible. Considering the properties, it is preferable to use a metal mold.

  In the manufacturing method of the present invention, it is particularly preferable to use a mold in which the cavity recess is formed in a shape including a disk-shaped recess and a cross-sectional arc-shaped recess formed at the center lower portion thereof.

  In the present invention, it is also possible to use a mold as shown in FIG. Further, as shown in FIG. 2 (B), the cavity recess 21 has a disk-shaped recess 211, and a cross section having the same diameter as the disk-shaped recess 211 formed in the lower part of the disk-shaped recess 211. A mold having a shape including the arcuate recess 212 can also be suitably used.

  For example, as shown in FIG. 3, the lens resin material includes a liquid lens resin material 3 in the cavity recess 21 (FIG. 3A) formed in the mold 2. The concave portion is filled while adjusting the filling amount while adjusting the filling amount with the constant amount supply device 6 (FIGS. 3B and 3C). Thereafter, the surface of the resin material 3 and the mold 2 is covered with the thin piece material 5 (FIG. 3D). Next, the lens resin material droplet 31 is heated from above the thin piece material 5 using the far-infrared heater 71, the IH heater 72, or both to cure the lens resin material droplet 31 (FIG. 3E). )) Is preferred.

  After the lens resin droplet 31 is cured, it is cooled by an air blower 81 and air-cooled by a blower 81 or water-cooled by a heat sink 82 (FIG. 3 (F)), and separated from the mold 2 by a take-out machine 9. The lens 1 can be obtained by molding (FIG. 3G). The obtained lens 1 has the convex surface 1 which becomes the condensing surface of the lens of the cavity recessed part 21, and the flat lens bottom face.

  In the above figure, an example in which one cavity recess is formed in the mold is illustrated, but the present invention is not limited to this, and a plurality of cavity recesses are provided on the upper surface of one mold, and each cavity recess is provided. It is also possible to manufacture the lens by filling the lens resin material in order or using a plurality of quantitative supply devices at once.

  In the present invention, a liquid resin material is used for the lens. As such a material, a conventionally known liquid resin material used for the production of a resin lens can be used, and a silicone resin composition is particularly preferably used. By curing such a liquid silicone resin composition, a lens made of silicone resin can be obtained. As the silicone resin composition, a liquid addition reaction curable silicone resin composition is particularly preferable. The liquid addition reaction curable silicone resin composition is suitable because it can be uniformly cured both on the surface and inside.

  The addition reaction type silicone resin composition is not particularly limited as long as it forms a transparent silicone resin by thermosetting. For example, an organopolysiloxane is used as a base polymer, and an organohydrogenpolysiloxane and a platinum catalyst. And those containing heavy metal catalysts such as

As the organopolysiloxane, the following average unit formula RaSiO _{(4-a) / 2}
Wherein R is an unsubstituted or substituted monovalent hydrocarbon group, preferably having 1 to 10 carbon atoms, particularly 1 to 8. a is a positive number of 0.8 to 2, particularly 1 to 1.8. Number.)
The thing shown by is mentioned. Here, as R, alkyl group such as methyl group, ethyl group, propyl group, butyl group, alkenyl group such as vinyl group and butenyl group, aryl group such as phenyl group and tolyl group, aralkyl group such as benzyl group, Examples include a chloromethyl group, a chloropropyl group, a 3,3,3-trifluoropropyl group, a cyano group-substituted hydrocarbon group in which some or all of the hydrogen atoms bonded to these carbon atoms are substituted with halogen atoms. , R may be the same or different, but those containing a phenyl group as R, particularly those containing 5 to 80 mol% of all R are phenyl groups, are heat resistance and transparency of the optical lens. From the point of view, it is preferable.

  Further, those containing an alkenyl group such as a vinyl group as R, particularly those having 1 to 20 mol% of all R are alkenyl groups are preferred, and those having two or more alkenyl groups in one molecule are preferably used. . Examples of such an organopolysiloxane include terminal alkenyl group-containing diorganopolysiloxanes such as dimethylpolysiloxane having a terminal alkenyl group such as a vinyl group and a dimethylsiloxane / methylphenylsiloxane copolymer.

On the other hand, the organohydrogenpolysiloxane is preferably trifunctional or higher (that is, one having three or more hydrogen atoms (Si-H groups) bonded to a silicon atom in one molecule), for example, methylhydrogenpolysiloxane. , Methylphenyl hydrogen polysiloxane, and the like, and liquids at room temperature are particularly preferable. Examples of the catalyst include platinum, platinum compounds, organometallic compounds such as dibutyltin diacetate and dibutyltin dilaurate, and metal fatty acid salts such as tin octenoate. The types and amounts of these organohydrogenpolysiloxanes and catalysts may be appropriately determined in consideration of the degree of crosslinking and the curing rate. In addition to the above components, fillers, heat-resistant materials, plasticizers and the like may be added to the extent that the strength and transparency of the resulting silicone resin are not impaired. Examples of the silicone resin composition include KE1935 (A / B) manufactured by Shin-Etsu Chemical Co., Ltd., KJR632, GE Toshiba Silicone Co., Ltd. XE14-062, XE14-907, Toray Dow Corning Silicone Co., Ltd. SH6103, DX Commercial products such as −35-547 can be used.

  The manufacturing method of the present invention is particularly suitable when a small resin lens having a diameter of about 1 to 30 mm and a thickness of about 0.5 to 30 mm is manufactured. In the above example, the case where the chip type light emitting diode is used as the semiconductor optical element is illustrated. However, the present invention is not limited to this. For example, as a lens such as a light receiving element for image formation in which a light receiving element chip is incorporated. It is also possible to use it.

An example of a light emitting device manufactured using a lens obtained by the manufacturing method of the present invention is shown in FIG. As shown in FIG. 4, the resin lens 1 is placed on the transparent resin 106 that seals the light emitting diode 103. By adding a phosphor to the transparent resin 106, the wavelength of light from the light emitting diode can be converted. Alternatively, the wavelength of light can be similarly converted by installing a resin cover (cap) containing a phosphor so as to cover the light emitting diode.

In the present invention, the method including a step of covering or adhering a thin piece material to a resin lens material to cover the resin lens material can not only reliably prevent bubbles from being mixed, but also the product portion on the thin piece material. This is preferable because the thin burr portion protruding from the (molded lens portion) can be adhered or adhered to facilitate finishing. In addition, a method including a step of using a resin film or paper that has been subjected to a treatment for improving adhesion or adhesiveness as the flake material is also preferable because it can reliably prevent air bubbles from entering.
In these aspects, since the product portion and the thin portion have a thickness, a thin burr portion remains on the resin film or paper, and the product portion can be easily peeled off from the film because of the thickness. The finishing process can be simplified (FIG. 6). Further, as described above, when a metal as a flake material is used, it is possible to recycle the used metal to the original state after the production of the product part, and therefore it is easy to reuse.

  Here, the treatment for improving the adhesion or adhesiveness to the resin film or paper as the thin piece material is a treatment for changing the surface state or a surface modification treatment. Examples of the treatment for changing the surface state include silicone treatment, primer treatment, and satin treatment. Among these processes for changing the surface state, for example, when a satin finish is performed, the satin finish is transferred from the film or paper to the bottom surface of the lens. When the lens with the satin texture transferred thereon is used in a semiconductor optical light emitting element, the adhesion between the lens and the sealant can be improved, or a light diffusion effect can be achieved when the lens is not bonded. In addition, for the primer treatment, a method of integrally heating or using a hot-melt adhesive method using a TPR-based, polyester-based, or polyamide-based adhesive such as an ethylene-vinyl acetate copolymer, olefin-based, or thermoplastic elastomer is used. Methods commonly performed in the art, such as methods, can be used.

Examples of the surface modification treatment include ultraviolet treatment, ozone treatment, corona treatment, and plasma treatment. Of these surface modification treatments, ultraviolet treatment and ozone treatment are preferred because they are simple and highly effective, and ultraviolet treatment is particularly preferred.
The time for performing the surface modification treatment can be appropriately changed. For example, in the ultraviolet treatment, there is an advantage that by shortening the irradiation time, the irradiation process can be completed in a short time and the molded lens and film can be more easily separated. In addition, when the irradiation time is lengthened, the thin burr portion (the remaining portion of the resin other than the molded lens that is bonded to the film or paper) and the film or paper are more strongly bonded, so that it is molded. It is easier to peel off the lens from the film or paper. Therefore, the ultraviolet irradiation time is preferably 1 to 700 seconds, more preferably 15 to 650 seconds, and most preferably 30 to 600 seconds.

  According to the present invention, the resin lens for a semiconductor optical element has a function as a condensing lens, and has no defects caused by mixing of bubbles or bubbles due to curing shrinkage during the manufacture of the lens, and the bottom surface of the lens is flattened. Can be manufactured with high productivity.

  EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to the following examples.

[Example 1]
As a lens resin material, a liquid silicone resin composition (XE14-907 (manufactured by GE Toshiba Silicone)) having an organopolysiloxane having a phenyl group bonded to a silicon atom as a base polymer was optically processed. 1 is filled with the liquid silicone composition using a quantitative supply device, and the entire mold surface is covered so that the surface of all the liquid silicone compositions is covered. A 75 μm thick PET film (Lumirror 75 T60 manufactured by Toray Industries, Inc.) is attached to the surface. Next, by heating the mold, the liquid silicone composition was cured, and after cooling, the mold was released from the mold to produce 100 silicone resin lenses (diameter 6 mm, thickness 3 mm). All of these lenses had a flat bottom surface.

[Example 2]
A resin film subjected to surface modification was used. Surface modification is performed on a PET film with a thickness of 100 μm, manufactured by Toray Industries, Ltd., using a UV irradiation machine PHOT SURFACE PROCESSOR MODEL PL16-110 lamp SUV110GS-36 manufactured by Sen Engineering Co., Ltd. The process was performed for 600 seconds.
The lens cavity concave portion was filled with silicone resin KJR632 manufactured by Shin-Etsu Chemical Co., Ltd., covered with a surface-modified PET film so as not to contain air bubbles, closed with an upper mold, heated at 170 ° C. for 30 minutes, and molded. It was confirmed that the thin burr part adhered to the PET film, the product part could be peeled off from the PET film (Table 1), and that the bottom part of each of these product parts (lenses) was flattened. It was.

Example 3
Lumirror made by Toray Industries, Inc. The surface state of a PET film having a thickness of 100 μm was changed, that is, the surface was roughened by roughening the surface, and the lens cavity recess was filled with silicone resin KJR632 manufactured by Shin-Etsu Chemical Co., Ltd. Cover with PET film so that no air bubbles enter, close with upper mold and heat and mold at 170 ° C for 30 minutes, thin burr part can adhere to PET film and product part can be peeled from PET film It was confirmed that the bottom surfaces of these product parts (lenses) were flattened. The pear ground of the film was transferred, and the bottom surface of the lens became pear ground.

Example 4
Fill the lens cavity recess with silicone resin KJR632 from Shin-Etsu Chemical Co., Ltd., and use a copy paper that has been spray-coated with dimethylsilicone mold release material and dried, instead of film, and cover it to prevent bubbles from entering. When the mold is closed and heated at 170 ° C for 30 minutes and molded, the thin burr part adheres to the copy paper, the product part can be peeled off from the copy paper, and all these product parts (lenses) are on the bottom. It was confirmed that each was flattened.

Example 5
Lumirror made by Toray Industries, Inc. A dome-shaped projection having a height of 3 mm was formed on the surface of a PET film having a thickness of 100 μm using a mold and a heating press. Next, the lens cavity recess (φ6 height 6 mm) was filled with silicone resin KJR632 manufactured by Shin-Etsu Chemical Co., Ltd., and the protrusion was covered with the PET film so that no bubbles would enter the lens cavity recess. When the mold was closed and heated at 170 ° C. for 30 minutes for molding, it was confirmed that the thin burr part adhered to the PET film and the product part could be peeled off from the PET film. The convexity of the film was transferred, and the bottom surface of the lens became concave.

  According to the present invention, in a manufacturing method by compression molding of a lens, it is possible to prevent a defect portion from being formed on the bottom surface of the lens due to sinking or bubbles due to curing shrinkage of heat-curing resin material for the lens, and the bottom surface of the lens A method for producing a planarized resin lens for a semiconductor element is provided. Therefore, the present invention greatly contributes to the development of manufacturing industries and related industries such as resin lenses for semiconductor elements and semiconductor elements.

The manufacturing method of the lens using the thin piece material of this invention is shown. (A) is an example in which a thin piece material is used instead of the upper mold, and (B) is an example in which a thin piece material is interposed between the upper mold and the lower mold. The other example of the shaping | molding die used in the manufacturing method of this invention is shown. (A) is a zero of a mold in which the cavity concave portion 21 has a shape including only a circular arc-shaped concave portion 212, and (B) is formed in a disk-shaped concave portion 211 and a lower portion of the disk-shaped concave portion 211. This is an example of a molding die having a shape composed of the disk-shaped recessed portion 211 and the arc-shaped recessed portion 212 having the same diameter and the same diameter. Explanatory drawing explaining the process of manufacturing a lens with the manufacturing method of this invention is shown. An example of the semiconductor optical element using the lens manufactured by the manufacturing method of this invention is shown. The manufacturing method of the lens by the conventional compression molding is shown. An example of the process which peels the lens shape | molded in the manufacturing method of this invention from a thin piece material is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lens 101 Lead 102 Lead 103 Semiconductor light emitting element 104 Lead thin wire 105 Light emitter housing member 106 Sealing material (transparent resin)
2 Mold (Lower mold)
21 Cavity concave portion 211 Disc-shaped concave portion 212 Cross-section arc-shaped concave portion 3 Lens resin material 31 Liquid droplet 4 Mold (upper die)
DESCRIPTION OF SYMBOLS 5 Thin piece material 6 Fixed_quantity | feed_rate supply apparatus 71 Far-infrared heater 72 IH heater 81 Blower 82 Heat sink 9 Take-out machine 10 Thin burr | flash part

Claims (14)

A method of manufacturing a lens, comprising filling a mold cavity having a plurality of cavity recesses with an uncured lens resin material as a liquid lens resin material and filling at least the cavity recesses of the mold. The exposed surface of the uncured lens resin material is covered with a thin piece of material so as to be in close contact with the surface, and then the resin material is heated and cured to form a plurality of molded lens molds And removing the plurality of lenses from the flake material so that the individual lenses are separated one by one .   The method according to claim 1, wherein the uncured lens resin is filled in such an amount that the thin burr portion adheres to the flake material during peeling after curing, and the product portion is peeled off from the flake material. Among the plurality of cavity recesses, the cavity recess positioned at one end of the mold is filled with a larger amount of lens resin material than the cavity recess positioned at the other portion, and the other end is more than the cavity recess at the one end. toward part, it will be covered with thin material while deflated, the method according to claim 1 or 2. The method according to any one of claims 1 to 3 , wherein as the flake material , a flake material that has been subjected in advance to a treatment for improving the adhesion with the lens resin material is used. The method of Claim 4 that the process which improves the adhesiveness of a flake material is the process which changes a surface state, or a surface modification process. The method according to claim 5 , wherein the treatment for changing the surface state is a silicone treatment, a primer treatment or a satin treatment, and the surface modification treatment is an ultraviolet treatment, an ozone treatment, a corona treatment or a plasma treatment. The method according to any one of claims 1 to 6, wherein a flake material is interposed between the lower mold and the upper mold of the mold. Flake material, a resin film, paper, metal, rubber, is intended to include one or more of skin or fibers A method according to any one of claims 1-7. The method according to any one of claims 1 to 7, wherein the flake material is a heat-resistant resin film having a heat distortion temperature of 90 ° C or higher. The method according to claim 9 , wherein the resin film is a polyethylene terephthalate (PET) film. The method according to claim 9 or 10 , wherein the resin film has a thickness of 10 to 500 µm. The method according to any one of claims 1 to 11 , wherein the lens resin material is a silicone resin. Lens is a resin lens for semiconductor optical element, the method according to any one of claims 1 to 12. Transferring the surface shape of the flake material on the lens surface, the method according to any one of claims 1 to 13.

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