WO2018164462A1 - Decoration member and method for manufacturing decoration member - Google Patents

Abstract

The present application relates to a decoration member and a method for manufacturing the decoration member. The present application provides: a decoration member having dichroism exhibiting different colors according to viewing directions, and having improved visibility of the dichroism; and a method for manufacturing the decoration member.

Description

Decorative member and method of manufacturing the decorative member

This application is filed with the Korean Patent Application No. 10-2017-0028261 filed with the Korean Intellectual Property Office on March 6, 2017, and Korean Patent Application Nos. 10-2017-0136790 and 2017 filed with the Korean Patent Office on October 20, 2017. Claims the benefit of the date of filing of Korean Patent Application No. 10-2017-0160298, filed with the Korean Intellectual Property Office on November 28, 2008, the entire contents of which are incorporated herein.

The present application relates to a decorative member and a method for manufacturing the decorative member.

With the development of IT, portable electronic devices and electronic products have been diversified, and as the user's demand for design has increased, interest in the appearance of portable electronic devices and electronic products has increased.

Patent document 1 relates to the manufacturing method of the decorative member for electronic devices which applied the pattern. In general, decorative members to which a pattern is applied have one color, and interest in decorative members having dichroism showing different colors is increasing according to the viewing direction.

[Preceding technical literature]

[Patent Documents]

Patent Document 1: Republic of Korea Patent Publication No. 10-1652875

The present application provides a decorative member and a method of manufacturing the decorative member having dichroism showing different colors depending on the viewing direction and improving the visibility of the dichroic.

The present application relates to a decorative member. The exemplary decorative member may include a pattern layer including a convex-shaped surface including first and second inclined surfaces having different inclination angles, and an inorganic layer formed on the convex portion.

1 to 3 exemplarily illustrate a decorative member including a pattern layer and an inorganic layer (not shown) each including a surface having a convex portion P1 shape.

In the present specification, the inclination angles a2 and a3 of the convex portion P1 may mean an angle formed between the inclined surfaces S1 and S2 of the convex portion P1 and the horizontal plane of the pattern layer. In the drawings, unless otherwise specified, the first inclined plane may be defined as a left inclined plane of the convex portion, and the second inclined plane may mean a right inclined plane of the convex portion.

The convex portion P1 of the pattern layer may have a polygonal cross section and have a pillar shape extending in one direction. In one example, the cross section of the convex portion P1 may be triangular or have a shape further including a small concave portion at the tip (a pointed portion or a vertex portion) of the triangle.

An angle a1 formed between the first inclined surface S1 and the second inclined surface S2 may be in a range of 80 degrees to 100 degrees. The angle a1 may be specifically 80 degrees or more, 83 degrees or more, 86 degrees or more, or 89 degrees or more, and 100 degrees or less, 97 degrees or less, 94 degrees or less, or 91 degrees or less. The angle may refer to the angle of the vertex consisting of the first slope and the second slope. When the first inclined surface and the second inclined surface do not form a vertex with each other, the first inclined surface and the second inclined surface may mean an angle of a vertex in a state of forming a vertex.

The difference between the inclination angle a2 of the first inclined surface of the convex portion P1 and the inclination angle a3 of the second inclined surface may be in a range of 30 degrees to 70 degrees. The difference between the inclination angle a2 of the first inclined surface and the inclination angle a3 of the second inclined surface may be, for example, 30 degrees or more, 35 degrees or more, 40 degrees or more, or 45 degrees or more, 70 degrees or less, 65 degrees or less. , 60 degrees or less or 55 degrees or less. When the difference between the inclination angles of the first inclined plane and the second inclined plane is within the above range, it may be advantageous in terms of implementation of color representation according to the direction.

The height H1 of the convex portion P1 may be 5 μm to 30 μm. If the height of the convex portion is within the above range, it may be advantageous in terms of production process. In the present specification, the height of the convex portion may mean the shortest distance between the highest portion and the lowest portion of the convex portion with respect to the horizontal plane of the pattern layer.

The width W1 of the convex portion P1 may be 10 μm to 90 μm. If the width of the convex portion is within the above range, it may be advantageous in terms of process for processing and forming the pattern. The width W1 of the convex portion P1 may be, for example, 10 μm or more, 15 μm or more, 20 μm or more, or 25 μm or more, 90 μm or less, 80 μm or less, 70 μm or less, 60 μm or less, 50. It may be up to 40 μm, or up to 35 μm.

An interval between the convex portions P1 may be 0 μm to 20 μm. In the present specification, the distance between the convex portions may mean the shortest distance between two adjacent convex portions, at which one convex portion ends and another convex portion starts. If the spacing between the convex portions is properly maintained, the decorative member should have a relatively bright color when viewed from the side of the inclined surface where the inclination angle of the convex portion is larger, thereby improving the phenomenon that the reflection area is dark due to shading. As described later, a second convex portion having a smaller height than the convex portion may exist between the convex portions.

The pattern layer may have a flat portion on a surface opposite to the surface on which the convex portion is formed, and the flat portion may be formed on the base layer. A plastic substrate can be used as the substrate layer. Examples of the plastic substrate include triacetyl cellulose (TAC); COP (cyclo olefin copolymer) such as norbornene derivatives; Poly (methyl methacrylate); PC (polycarbonate); PE (polyethylene); PP (polypropylene); PVA (polyvinyl alcohol); DAC (diacetyl cellulose); Pac (Polyacrylate); PES (poly ether sulfone); PEEK (polyetheretherketon Polyphenylsulfone (PPS), polyetherimide (PEI); polyethylenemaphthatlate (PEN); polyethyleneterephtalate (PET); polyimide (PI); polysulfone (PSF); polyarylate (PAR) or amorphous fluorocarbon resin, but is not limited thereto. no.

The pattern layer may include a curable resin. Photocurable resin or thermosetting resin can be used as said curable resin. Ultraviolet curable resin can be used as said photocurable resin. As the thermosetting resin, for example, silicone resin, silicon resin, fran resin, polyurethane resin, epoxy resin, amino resin, phenol resin, urea resin, polyester resin, melamine resin, etc. may be used, but is not limited thereto. . UV curable resins typically include acrylic polymers such as polyester acrylate polymers, polystyrene acrylate polymers, epoxy acrylate polymers, polyurethane acrylate polymers or polybutadiene acrylate polymers, silicone acrylate polymers or alkyl acrylates. Polymers and the like may be used, but are not limited thereto.

 The said pattern layer can be manufactured by apply | coating curable resin composition on a base material layer, crimping | bonding by the mold which has a desired pattern, and hardening | curing. The mold may for example have a flat form or a roll form. As the mold, for example, a soft mold or a hard mold may be used.

A color dye may be further included inside or under the pattern layer. The colored dyes include anthraquinone-based dyes, phthalocyanine-based dyes, thioindigo-based dyes, perinone-based dyes, isoxindigo-based dyes, and methane-based dyes. Dyes, monoazo-based dyes and 1: 2 metal complex dyes.

When the pattern layer includes a colored dye therein, it may be applied by adding a dye to the curable resin. When further comprising a colored dye in the lower portion of the pattern layer, it may be applied by coating a layer containing the dye on the upper or lower portion of the base layer.

The content of the colored dye may be 0 to 50 wt%, for example. The content of the colored dye may determine the transmittance and haze range of the pattern layer to the decorative member, the transmittance may be, for example, 20% to 90%, and the haze may be, for example, 1% to 40%.

The inorganic layer may give a metallic texture and depth of color when looking at the decorative member. The inorganic layer may be viewed in various colors according to the viewing angle of the image of the decorative member. This is because the wavelength of the light passing through the pattern layer and reflected from the surface of the inorganic layer changes according to the wavelength of the incident light.

The inorganic layer may include a metal. Examples of the inorganic layer include indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), and vanadium. (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nb), iron (Fe), chromium (Cr), cobalt (Co), gold (Au) and silver (Ag) It may include one or two or more of the materials, oxides, nitrides or oxynitrides thereof, carbon and carbon composites. The inorganic layer may be a single layer or multiple layers including the material.

The inorganic layer may have a refractive index of 0 to 8 with respect to light having a wavelength of 400 nm. When the refractive index of the inorganic layer is out of the range, the reflected light decreases and may not be appropriate. The refractive index of the inorganic layer may be specifically 0 or more, 1 or more, 2 or more, 3 or more, 4 or more, or 4.5 or more, 8 or less, 7 or less, 6 or less, or 6.5 or less.

The inorganic layer may have a thickness of, for example, 10 nm to 1 μm. When the thickness of the inorganic layer is within the above range, it may be advantageous to provide a decorative member having dichroism showing a different color depending on the viewing direction and improving the dichroic visibility. The inorganic layer may have a thickness of, for example, 10 nm or more, 50 nm or more, or 100 nm or more, and may be 1 μm or less, 800 nm or less, 600 nm or less, 400 nm or less, or 300 nm or less. The decorative member may exhibit dichroism showing different colors depending on the viewing direction. The decorative member can improve the dichroic visibility by modifying the surface shape of the pattern layer.

1 exemplarily shows a decorative member including a pattern layer according to the first embodiment of the present application. According to the first embodiment of the present application, the surface of the pattern layer may have a shape in which the second convex portion P2 having a smaller height than the convex portion is disposed between the convex portions P1. Hereinafter, the convex part named before the second convex part may be referred to as the first convex part. As described above, the gap between the convex portions may be maintained in order to improve a phenomenon in which the reflective region is dark due to shading. However, when the flat portion is present between the convex portions, there is a problem that the flat portion is recognized as a striation. If the second convex portion having a smaller height is disposed between the first convex portions as described above, this problem can be solved. Such a decorative member may implement different colors in three directions of a large inclination angle, a small side, and a front side.

The height H2 of the second convex portion P2 may have a range of 1/5 to 1/4 of the height H1 of the first convex portion P1. For example, the difference between the heights H1-H2 of the first convex portion and the second convex portion may be 10 μm to 30 μm. The width W2 of the second convex portion may be 1 μm to 10 μm. The width W2 of the second convex portion may be specifically 1 μm or more, 2 μm or more, 3 μm or more, 4 μm or more, or 4.5 μm or more, 10 μm or less, 9 μm or less, 8 μm or less, 7 μm or less, 6 μm or less or 5.5 μm or less.

The second convex portion may have two inclined surfaces S3 and S4 having different inclination angles. An angle a4 formed by the two inclined surfaces of the second convex portion may be 20 degrees to 100 degrees. The angle a4 may be specifically 20 degrees or more, 30 degrees or more, 40 degrees or more, 50 degrees or more, 60 degrees or more, 70 degrees or more, 80 degrees or more, or 85 degrees or more, and 100 degrees or less or 95 degrees or less. have. A difference a6-a5 of the inclination angles of both inclined surfaces of the second convex portion may be 0 to 60 degrees. The difference a6-a5 of the inclination angle may be 0 degrees or more, 10 degrees or more, 20 degrees or more, 30 degrees or more, 40 degrees or more, or 45 degrees or more, and 60 degrees or less or 55 degrees or less. When the dimension of the second convex portion is in the above range, it may be advantageous in terms of increasing the inflow of light from the side having a large inclined plane angle to form a bright color.

2 exemplarily shows a decorative member including a pattern layer according to the second embodiment of the present application. According to the second embodiment of the present application, the surface of the pattern layer may have a shape further including a concave portion P3 having a smaller height than the convex portion at the tip portion (pointed portion) of the convex portion P1. Can be. Such a decorative member may have an effect that the image color is slightly changed depending on the viewing angle.

The height H3 of the recess P3 may be 3 μm to 15 μm. The height H3 of the recess P3 may be specifically 3 μm or more, and may be 15 μm or less, 10 μm or less, or 5 μm or less. The concave portion may have two inclined surfaces S5 and S6 having different inclination angles. An angle a7 formed by the two inclined surfaces of the recess may be 20 degrees to 100 degrees. The angle a7 may be specifically 20 degrees or more, 30 degrees or more, 40 degrees or more, 50 degrees or more, 60 degrees or more, 70 degrees or more, 80 degrees or more, or 85 degrees or more, and 100 degrees or less or 95 degrees or less. have. The difference a9-a8 between the inclination angles of both inclined surfaces of the recess may be 0 to 60 degrees. The difference (a9-a8) of the inclination angle may be 0 degrees or more, 10 degrees or more, 20 degrees or more, 30 degrees or more, 40 degrees or more, or 45 degrees or more, and 60 degrees or less or 55 degrees or less. When the size of the concave portion is in the above range it may be advantageous in terms of adding color in the mirror surface.

3 exemplarily shows a decorative member including a pattern layer according to the third embodiment of the present application. According to the third embodiment of the present application, as shown in FIG. 3A, the surface of the pattern layer may have a shape in which a plurality of convex portions are arranged in an inverted structure of 180 degrees. In detail, the surface of the pattern layer may include a first region C1 having a larger inclination angle of the second inclined surface than a first inclined surface and a second region C2 having a larger inclination angle of the second inclined surface than the first inclined surface. . In one example, the convex portion included in the first region may be referred to as a first convex portion P1, and the convex portion included in the second region may be referred to as a fourth convex portion P4. The height, width, inclination angle, and angle formed by the first and second inclined surfaces of the first convex portion P1 and the fourth convex portion P4 may be the same as those described in the items of the convex portion P1. have. As shown in (b) of FIG. 3, one of the first area and the second area may correspond to an image or a logo, and the other area may correspond to a background part. Such a decorative member may have an effect that the image or logo color is softly changed depending on the viewing angle. In addition, the color may change depending on the direction in which the image or logo portion and the background portion look.

The first region and the second region may each include a plurality of convex portions. The width and the number of the convex portions of the first region and the second region may be appropriately adjusted in consideration of the size of the desired image or logo.

The present application also relates to a method of manufacturing a decorative member. 4 exemplarily shows a method of manufacturing a decorative member of the present application. Exemplary manufacturing methods include depositing first and second inorganic layers, respectively, on the first and second inclined surfaces of the patterned layer comprising convex-shaped surfaces comprising first and second inclined surfaces having different inclination angles. can do.

An exemplary manufacturing method deposits an inorganic layer on each of the two inclined surfaces of the pattern layer, so that the thickness and type of the inorganic layer may be adjusted on each inclined surface, thereby broadening the dichroic spectrum. Unless otherwise described with respect to the manufacturing method, the contents described in the items of the decorative member may be equally applied.

The first and second inorganic layers may be deposited on the first and second slopes, respectively, by a sputtering method or an evaporation method. In particular, since the sputtering method is straight, it is possible to maximize the difference in deposition thickness of both inclined surfaces by tilting the position of the target.

 In one example, the first inorganic layer 201 is tilted toward an inclined plane having a smaller inclination angle among the first and second inclined planes of the pattern layer 10 (S1), and then tilted toward an inclined plane having a larger inclination angle. 2 inorganic layer 202 may be deposited (S2). The order of the process (S1 and S2) may be reversed, it may be advantageous in terms of depositing inorganic materials of different thickness on both inclined surfaces.

The first and second inorganic layers may be deposited on the first and second inclined surfaces with different thicknesses. The thicknesses of the first and second inorganic layers may be appropriately adjusted in consideration of the desired luminous characteristics within the range described in the items of the decorative member, respectively.

The first and second inorganic layers may be deposited on the first and second inclined surfaces with different materials. The material of the first and second inorganic layers may be appropriately adjusted in consideration of the desired luminous properties in the material in the item of the decorative member, respectively.

The inorganic layer may be composed of a single layer, it may be composed of a multilayer of two or more layers.

The inorganic material layer may include a third inorganic material layer and a fourth inorganic material layer sequentially stacked on the convex portion. The materials included in each layer may be the same or different from each other. In addition, the material of the third and fourth inorganic material layer may include the material of the inorganic material layer described above. The third inorganic layer may be represented by a light absorption layer, and the fourth inorganic layer may be represented by a light reflection layer.

The light absorption layer and the light reflection layer may be composed of a single layer, or may be composed of a multilayer of two or more layers.

In the light absorbing layer, light is absorbed at the incident path and the reflecting path of the light, and the light is reflected at the surface of the light absorbing layer and at the interface between the light absorbing layer and the light reflecting layer, respectively, so that the two reflected light beams reinforce or cancel each other.

The light reflected from the surface of the light absorbing layer may be represented by the surface reflected light, and the light reflected from the interface between the light absorbing layer and the light reflecting layer may be represented as interface reflected light.

According to one example, the shape of the convex portion or the concave portion of the surface of the pattern layer may be a convex portion of the cone shape protruding out of the surface of the pattern layer or the shape of a cone recessed into the surface of the pattern layer. It may be a recess of.

Cone forms include cones, ellipses, or polygonal cones. Here, the shape of the bottom surface of the polygonal pyramid includes a triangle, a square, and a star shape having five or more protruding points. According to an example, when the decorative member is placed on the ground, when the surface of the pattern layer has a cone-shaped convex shape, at least one of the vertical cross-sections of the convex shape with respect to the ground may be triangular in shape. . According to another example, when the decorative member is placed on the ground, when the surface of the pattern layer has a concave shape of a cone, at least one of the vertical cross-sections of the concave shape with respect to the ground is an inverted triangle shape. Can be.

According to an example, the cone-shaped convex portion or the cone-shaped concave portion may have at least one cross section of an asymmetric structure. For example, when the convex portion or the concave portion of the cone shape is observed from the surface side of the convex portion or the concave portion, when two or less identical forms exist when rotating 360 degrees from the vertex of the cone, the dichroism is It is advantageous to be expressed. Fig. 7 shows the convex shape of the cone shape observed from the surface side of the convex shape, (a) shows the cone shape of the symmetrical structure, and (b) shows the cone shape of the asymmetric structure. It is illustrated.

When the decorative member is placed on the ground, the cone shape of the symmetrical structure has a circular cross section (hereinafter referred to as a horizontal cross section) in a direction horizontal to the ground, or a regular polygon having the same length of each side, and the vertex of the cone is on the ground. It is a structure existing on a line perpendicular to the cross section of the center of gravity of the horizontal cross section for. However, a cone shape having a cross section of an asymmetric structure is located on the vertical line of the point where the vertex position of the cone is not the center of gravity of the horizontal cross section of the cone when observed from the surface side of the shape of the convex portion or the recess portion of the cone shape. Or the horizontal cross section of the cone is a polygon or ellipse of an asymmetric structure. When the horizontal cross section of the cone is a polygon of an asymmetric structure, at least one of the sides or angles of the polygon may be designed differently from the rest.

For example, as shown in Figure 8, the position of the vertex of the cone can be changed. Specifically, as shown in the first picture of Fig. 8, when the vertex of the cone is designed to be positioned on the vertical line of the center of gravity (01) of the horizontal cross section with respect to the ground of the cone when viewed from the surface side of the convex shape of the cone shape, Four identical structures can be obtained at 360 degrees of rotation from the vertex of the cone (4 fold symmetry). However, the symmetrical structure is broken by designing the vertices of the cone at position 02, not the center of gravity 01 of the horizontal cross section with respect to the ground. The length of one side of the horizontal cross section with respect to the ground x, the distance of the cone's vertices a and b, the height of the cone shape, the length of the line connected vertically from the vertex of the cone (01 or 02) to the horizontal cross section with respect to the ground. h, the angle formed between the horizontal cross section and the side surface of the cone is? n, and a cosine value can be obtained as described below with respect to planes 1, 2, 3 and 4 of FIG.

At this time, since θ1 and θ2 are the same, there is no dichroism. However, since θ3 and θ4 are different, and │θ3 to θ4│ mean a color difference E * ab between two colors, they may exhibit dichroism. Where? 3-? 4 |> 0. Thus, by using the angle between the horizontal cross section and the side surface of the cone surface, it is possible to quantitatively indicate how the symmetrical structure is broken, that is, the degree of asymmetry. Proportional.

According to another example, the pattern layer has a surface of a convex portion having a linear point or a concave portion having a linear point. 10 to 12 show photographs of an example of implementing a convex portion having a line shape. The linear shape may be a straight line, a curved line, may include both a curved line and a straight line, or may be zigzag. The center of gravity of the horizontal cross section with respect to the ground surface of the convex portion or the concave portion is observed when the surface of the convex portion having the highest point is linear or the concave portion having the lowest point is observed from the surface side of the convex portion or the concave portion. It is advantageous to express dichroism when there is only one identical form when rotated 360 degrees as a reference. Fig. 9 shows a surface having the shape of a convex portion having a peak at a line, (a) illustrates a pattern having convex portions that do not express dichroism, and (b) has convex portions expressing dichroism. The pattern is illustrated. X-X 'cross section of FIG. 9 (a) is an isosceles triangle or equilateral triangle, and Y-Y' cross section of FIG. 9 (b) is a triangle from which the side length differs.

According to another example, the pattern layer has a convex or concave-shaped surface of the structure in which the tip of the cone shape is cut off. In FIG. 13, when the decorative member is placed on the ground, a photograph embodying an inverted trapezoidal recess having an asymmetrical cross section perpendicular to the ground is shown. Such asymmetric cross sections may be trapezoidal or inverted trapezoidal in shape. Also in this case, dichroism can be expressed by the cross section of an asymmetric structure.

6 exemplarily shows a decorative member including a pattern layer according to the fourth embodiment of the present application. According to the fourth embodiment of the present application, as shown in FIG. 6, the inorganic layer has a decorative member having a multilayer structure. Specifically, the light absorption layer 401 and the light reflection layer 501 sequentially formed on the convex portion of the pattern layer may include. At this time, the thickness t1 of the light reflection layer in the region E of the pattern layer including the first inclined surface and the thickness t2 of the light reflection layer in the region F of the pattern layer including the second inclined surface may be the same or different. Figure 6 relates to a light absorption layer having a structure in which the inclined surfaces facing each other, that is, the cross section is triangular. In the structure of the pattern having the inclined surfaces facing each other as shown in Figure 6, even if the deposition is carried out under the same conditions, the thickness of the light absorption layer may be different on the two surfaces of the triangular structure. Accordingly, the light absorption layer having two or more regions having different thicknesses can be formed by only one process. As a result, the expression color is different depending on the thickness of the light absorption layer. At this time, if the thickness of the light reflection layer is more than a certain amount does not affect the color change.

The light reflecting layer is not particularly limited as long as it is a material capable of reflecting light, but the light reflectance may be determined depending on the material, for example, color is easily implemented at 50% or more. Light reflectance can be measured using an ellipsometer.

The light absorption layer preferably has a refractive index n of 0 to 8 at 400 nm, may be 0 to 7, may be 0.01 to 3, and may be 2 to 2.5. The refractive index n may be calculated as sin θ1 / sin θ2 (θ1 is the angle of light incident on the surface of the light absorption layer, and θ2 is the angle of refraction of light inside the light absorption layer).

The light absorption layer has an extinction coefficient k of 400 nm and greater than 0 and 4 or less, preferably 0.01 to 4, 0.01 to 3.5, 0.01 to 3, and 0.1 to 1. The extinction coefficient (k) is -l / 4pI (dI / dx), where the path unit length in the light absorbing layer (dx), e.g., the fraction of dI / I of light intensity per meter multiplied by l / 4p Where l is the wavelength of light.

The light absorption layer has an extinction coefficient k of 380 to 780 nm greater than 0 and 4 or less, preferably 0.01 to 4, 0.01 to 3.5, 0.01 to 3, and 0.1 to 1. Since the extinction coefficient k is in the above range in the entire visible light wavelength range of 400 nm, preferably 380 to 780 nm, it may serve as a light absorbing layer within the visible light range.

Even if they have the same refractive index (n) value, when the extinction coefficient (k) value is 0 and the extinction coefficient (k) value is 0.01 at 380 to 780 nm

A difference of> 1 may be indicated. For example, when simulating the case of irradiating D65 (solar spectrum) as a light source to the laminated structure of glass / aluminum / aluminum oxide / air layer, E ^* ab when k value of the aluminum oxide is 0 and 0.01 is It was obtained as Table 1 below. At this time, the thickness h1 of the aluminum layer was 120 nm, and the thickness h2 of the aluminum oxide layer is shown in Table 1 below. The k value was arbitrarily set to 0 and 0.01 for the simulation, and the n value was used as the aluminum value.

h2 [nm]	k = 0			k = 0.01			△ E * ab
	L	A	b	L	A		b
40	6.63	1.75	-1.25	85.18	2.09	0.03	1.96
60	9.83	-4.02	-8.30	87.86	-4.06	-9.01	2.10
80	5.60	-1.87	-2.58	94.44	-2.05	-2.86	1.20

According to an exemplary embodiment, the light reflection layer may be a metal layer, a metal oxynitride layer, or an inorganic layer. The light reflection layer may be composed of a single layer, or may be formed of two or more layers. For example, the light reflection layer may be formed of indium (In), titanium (Ti), tin (Sn), silicon (Si), Germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), vanadium (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nb), iron (Fe), 1 or 2 or more materials selected from chromium (Cr), cobalt (Co), gold (Au) and silver (Ag), oxides, nitrides or oxynitrides thereof, or one or more materials It may be a single layer or a multi-layer containing. For example, the light reflection layer may include two or more alloys selected from the above materials, oxides, nitrides or oxynitrides thereof. For example, the light reflection layer may include two or more alloys selected from the metals. More specifically, the light reflection layer may include molybdenum, aluminum or copper. According to another example, the light reflection layer may be manufactured using an ink containing carbon or a carbon composite to implement a high resistance reflective layer. Carbon or carbon composites include carbon black and CNT. The ink containing the carbon or carbon composite material may include the above-described materials or oxides, nitrides or oxynitrides thereof, such as indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium ( Ge). Aluminum (Al), Copper (Cu), Nickel (Ni), Vanadium (V), Tungsten (W), Tantalum (Ta), Molybdenum (Mo), Neodymium (Nb), Iron (Fe), Chromium (Cr), One or two or more oxides selected from cobalt (Co), gold (Au), and silver (Ag) may be included. After printing the ink containing the carbon or carbon composite, a curing process may be further performed. When the light reflection layer includes two or more kinds of materials, two or more kinds of materials may be formed in one process such as deposition or printing. Although it may be formed using a method, a method may be used in which a layer is first formed of at least one material, and then a layer is formed thereon with at least one material. For example, after indium or tin is deposited to form a layer, the ink containing carbon may be printed and cured to form a light reflection layer. The ink may further include an oxide such as titanium oxide and silicon oxide.

According to an exemplary embodiment, the light absorption layer may be a single layer or a multilayer of two or more layers. The light absorption layer may be made of a material having an extinction coefficient k at 380 to 780 nm, that is, a material having an extinction coefficient greater than 0 and 4 or less, preferably 0.01-4. For example, the light absorption layer may include one or two or more selected from the group consisting of metals, metalloids, and oxides, nitrides, oxynitrides and carbides of metals or metalloids. Oxides, nitrides, oxynitrides or carbides of the metal or metalloid can be formed by deposition conditions set by those skilled in the art. The light absorption layer may include the same metal, metalloid, two or more alloys or oxynitrides as the light reflection layer.

For example, the light absorption layer may include indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), vanadium (V). , Tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nb), iron (Fe), chromium (Cr), cobalt (Co), gold (Au) and silver (Ag) Or a single layer or multiple layers comprising two or more materials or oxides, nitrides or oxynitrides thereof. As a specific example, the light absorption layer may include one or two or more selected from copper oxide, copper nitride, copper oxynitride, aluminum oxide, aluminum nitride, aluminum oxynitride, and molybdenum titanium oxynitride.

According to one example, the light absorbing layer includes silicon (Si) or germanium (Ge).

The light absorption layer made of silicon (Si) or germanium (Ge) has a refractive index (n) of 0 to 8 and may be 0 to 7 at 400 nm, and an extinction coefficient (k) of more than 0 to 4 or less, preferably 0.01 to 4, and may be 0.01 to 3 or 0.01 to 1.

According to one example, the light absorption layer is AlOxNy (x> 0, y> 0).

According to another example, the light absorption layer may be AlOxNy (0 ≦ x ≦ 1.5, 0 ≦ y ≦ 1).

According to another example, the light absorption layer is AlOxNy (x> 0, y> 0), the number of each atom satisfies the following equation for the total number of atoms 100%.

According to one embodiment, the light absorption layer may be made of a material having an extinction coefficient (k) at 400 nm, preferably 380 to 780 nm. For example, the light absorption layer / light reflection layer may be formed of CuO / Cu, CuON / Cu, CuON / It may be formed of a material such as Al, AlON / Al, AlN / AL / AlON / Cu, AlN / Cu.

According to one embodiment, the thickness of the light reflection layer can be determined according to the desired color in the final structure, for example 1 nm or more, preferably 25 nm or more, such as 50 nm or more, preferably 70 nm or more.

According to an exemplary embodiment, the thickness of the light absorption layer may be 5 to 500 nm, for example, 30 to 500 nm. Exemplary decorative members and methods of manufacturing the decorative members can be applied to known objects in need of application of decorative members. For example, the present invention may be applied without limitation to portable electronic devices and electronic products.

In the present application, the light absorption layer and the light reflection layer are named according to their function. For light having a specific wavelength, a layer that reflects light relatively much may be represented by a light reflection layer, and a layer that reflects light relatively little may be represented by a light absorption layer.

22, the light absorption layer and the light reflection layer will be described. In the decorative member of FIG. 22, each layer is laminated in the order of L _i-1 layer, L _i layer, and L _{i + 1} layer based on the direction of light input, and is located between the L _i-1 layer and the L _i layer. Interface I _i is located at, and interface I _{i + 1} is located between the L _i layer and the L _{i + 1} layer.

When irradiating light having a specific wavelength in a direction perpendicular to each layer so that thin film interference does not occur, the reflectance at the interface Ii may be expressed by Equation 1 below.

[Equation 1]

In Equation 1, n _i (λ) denotes a refractive index according to the wavelength λ of the i-th layer, and k _i (λ) denotes an extinction coefficient according to the wavelength λ of the i-th layer. Means. The extinction coefficient is a measure that can define how strongly the target material absorbs light at a particular wavelength, as defined above.

By applying Equation 1 above, when the sum of reflectances for each wavelength at the interface I _i calculated at each wavelength is R _i , R _i is represented by Equation 2 below.

[Equation 2]

In this case, when Ii has the largest R _i among the interfaces of the laminate, the layer that is in contact with the interface Ii and faces the interface Ii and the direction in which the light enters may be defined as the light reflection layer and the remaining layer as the light absorption layer. For example, in the laminate shown in Fig. 22, when the sum of the wavelength specific reflectivity of the interface I _{i + 1} the largest, in contact with I _{i + 1,} the interface I _{i + 1} and the light is located opposite to the incoming direction The layer L _{i + 1} layer may be defined as a light reflection layer, the remaining layers L _i-1 and L _i layers as light absorbing layers.

The manner in which the decorative member is applied to the portable electronic device or the electronic product is not particularly limited, and a known method known in the art as a method of applying the decor film to the portable electronic device or the electronic product may be applied. In one example, the decorative member may be applied by direct coating to a portable electronic device or an electronic product. In this case, a separate adhesive layer for attaching the decorative member to a portable electronic device or an electronic product may not be necessary. In another example, the decorative member may be attached to a portable electronic device or an electronic product through the adhesive layer. The adhesive layer may use an optically clear adhesive tape (OCA tape) or an adhesive resin. The OCA tape or adhesive resin may be applied without limitation OCA tape or adhesive resin known in the art.

The present application provides a decorative member and a method of manufacturing the decorative member having dichroism showing different colors depending on the viewing direction and improving the visibility of the dichroic.

1 exemplarily shows a decorative member of the present specification.

2 exemplarily shows a decorative member of the present specification.

3 exemplarily shows a decorative member and left and right views of the present specification.

4 exemplarily shows a method of manufacturing a decorative member of the present specification.

5 is a dichroic luminous evaluation result of Example 1. FIG.

6 illustrates a laminated structure of a decorative member according to an exemplary embodiment of the present specification.

7 to 9 illustrate the top structure of the light absorption layer of the decorative member.

10-14 are examples of convex or concave-shaped surfaces of a patterned layer in accordance with some embodiments.

15 and 16 show the structure and the color observation result of the decorative member of Examples 5-7.

17 and 18 show the experimental results according to the evaluation example 2.

19 is a graph showing n and k values of aluminum oxynitride.

20 and 21 are diagrams introduced to explain the color coordinate system.

22 is a view introduced to explain the light absorption layer and the light reflection layer.

The three numbers indicated in the color of FIG. 16 are L * ab coordinate values of the color.

Hereinafter, the present application will be described in detail with reference to Examples, but the scope of the present application is not limited by the following Examples.

Example 1

The hard mold was processed to have a pattern of the structure of FIG. 1. The pattern layer having the structure of FIG. 1 was formed by applying a composition containing an epoxy resin and a phthalocyanine dye on the substrate layer, pressing the hard mold, and curing the same with ultraviolet rays. Aluminum was deposited to a thickness of 200 nm on the upper part of the pattern layer to form an inorganic layer to prepare a decorative member. The inorganic layer has a refractive index of 5 for light having a wavelength of 400 nm. Both inclination angles of the first convex portions of the manufactured decorative members were 20 degrees and 70 degrees, respectively, and the width was 30 µm, and both inclination angles of the second convex portions were 20 degrees and 70 degrees, respectively, and the width was 5 µm. The heights of the first and second convex portions are determined from the width and the inclination angle, respectively.

Example 2

A decorative member was manufactured in the same manner as in Example 1 except that the soft and hard molds were processed to have the pattern of the structure of FIG. 2. Both inclination angles of the convex portions of the manufactured decorative members were 20 degrees and 70 degrees, respectively, and the width was 30 micrometers, and both inclination angles of the concave portions were 20 degrees and 70 degrees, respectively, and the height was 3 micrometers. The height of the convex portion is determined from the width and the inclination angle, and the width of the concave portion is determined from the height and the inclination angle.

Example 3

A decorative member was manufactured in the same manner as in Example 1, except that the soft and hard molds were processed to have the pattern of FIG. 3. Both inclination angles of the first convex portions of the convex portions of the first region of the manufactured decorative member are 20 degrees and 70 degrees, respectively, and 30 μm in width, and the convex portions of the second region have a 180 degree reverse phase structure with the convex portions of the first region. Both inclination angles have 70 degrees and 20 degrees, respectively.

Example 4

The decorative member was manufactured in the method of FIG. 4 by the sputter method. A pattern layer was prepared in the same manner as in Example 1, and the molten dendrite was deposited to a thickness of 100 nm to form a first inorganic layer by tilting toward the first inclined surface of the pattern layer, followed by tilting toward a second inclined surface to deposit aluminum to a thickness of 300 nm. A second inorganic material layer was formed.

Examples 5-7

After the UV curable resin was coated on the PET base layer to form a pattern (FIG. 12), nitrogen was added to the AlO _x N _y (0 ≤ x, 0.1 ≤ y ≤ 1) light by reactive sputtering. Was formed on the pattern of the substrate. A 100 nm thick Al was deposited on the light absorption layer by sputtering to form a light reflection layer (Al, 120 nm thick).

The shape of the pattern was formed as a repeating structure of the asymmetric prism structure as shown in Figure 15, the inclination angle of one side of the pattern is 60 °, the inclination angle of the opposite side is 40 ° (Example 5), 30 ° (Example 6), Samples were prepared at 20 ° (Example 7). At this time, the pitch of the patterns was 100 micrometers and the height of the pattern was 25 micrometers. Light is incident on the substrate side of the obtained sample, and the light passing through the light absorption layer and reflected by the light reflection layer can be observed on the substrate side. The thickness and color of the light absorption layer observed from the obtained sample are shown in FIG. 16. The n and k values of the aluminum oxynitride layer are described in FIG. 19.

Example 8

The decorative member was manufactured by the sputter | spatter system. A pattern layer was prepared in the same manner as in Example 1, and aluminum was deposited on the pattern layer to form an inorganic layer. The thickness of the inorganic layer on both inclined surfaces of the convex portions is 200 nm, respectively.

Comparative Example 1

After the UV curable resin was coated on the PET base layer to form a pattern (FIG. 12), nitrogen was added to the AlO _x N _y (0 ≤ x, 0.1 ≤ y ≤ 1) light by reactive sputtering. Was formed on the pattern of the substrate. A 100 nm thick Al was deposited on the light absorption layer by sputtering to form a light reflection layer (Al, 120 nm thick).

The pattern was formed in a repeating structure of the symmetrical prism structure, and the inclination angle of one side of the pattern was 45 ° and the inclination angle of the opposite side was 45 °. At this time, the pitch of the patterns was 100 micrometers and the height of the pattern was 25 micrometers. Light is incident on the substrate side of the obtained sample, and the light passing through the light absorption layer and reflected by the light reflection layer can be observed on the substrate side.

Evaluation Example 1 Dichroic Lactation Evaluation

The dichroic luminous evaluation was evaluated about the Examples 1-4 and the comparative example 1 by visual inspection. 5 (a) and 5 (b) are photographs of the right view and the left view of Example 1, respectively.

Evaluation Example 2 Dichroic Lactation Evaluation

FIG. 15 is a view illustrating a color change according to a viewing angle of a decorative member according to Example 1 and a decorative member according to Comparative Example 1. FIG.

The decorative member according to Example 1 exhibits dichroism showing different colors depending on the viewing angle, whereas the decorative member according to Comparative Example 1 shows only one color.

16 shows brightness values (L *), color values (* a), and saturation values (*) according to a viewing angle in the CIE L * a * b color space of the decorative member according to Example 1 and the decorative member according to Comparative Example 1. FIG. b) measured and compared.

In the case of Example 1, it was confirmed that the brightness value (L *) and the saturation value (* b) change greatly as the viewing angle changes.

On the other hand, in Comparative Example 1, it was confirmed that the brightness value (L *) and the saturation value (* b) did not change significantly even when the viewing angle was changed.

The figure shows the color when looking at the decorative member in the viewing angle coordinate system. Coordinates may be represented by (θ, φ). When the x-axis is perpendicular to the plane direction of the decorative member and the y-axis is any one of the plane direction of the decorative member, the angle formed by the x-axis and the viewing direction is θ, and the angle formed by the y-axis and the viewing direction is φ. It is called. When phi was 0 degrees (θ, 0), the L *, a * and b * values according to the change of θ were measured. For information on the viewing angle coordinate system, see IES type B Reference [IES-LM-75-01 Goniophotometer Types and Photometric Coordinates (title), IES (author), (Illuminating Engineering Society of North America, 2001)]. This is shown in FIG. 20.

In addition, the color of the decorative member was indicated when both θ and φ were changed. 21 shows the angle of the viewing angle coordinate system.

[Description of the code]

P1: Convex portion or first convex portion P2: Second convex portion P3: Concave portion, P4: Third convex portion 10: Pattern layer 201: First inorganic layer 202: Second inorganic layer H1, H2, H3: Height W1 , W2, W3: Width, S1, S2, S3, S4, S5, S6: Inclined surface, a1, a4, a7: Vertex angle, a2, a3, a5, a6, a8, a9: Inclined angle C1: First area C2: First 2 zones

Claims (16)

1. A decorative member comprising a pattern layer including a convex-shaped surface including first and second inclined surfaces having different inclination angles, and an inorganic layer formed on the convex portion.
2. The decorative member of claim 1, wherein an angle formed by the first inclined surface and the second inclined surface is in a range of 80 to 100 degrees.
3. The decorative member of claim 1, wherein a difference between the inclination angles of the first inclined surface and the second inclined surface is in a range of 30 degrees to 70 degrees.
4. The decorative member according to claim 1, wherein the pattern layer has a flat portion on a surface opposite to the surface on which the convex portion is formed, and the flat portion is formed on the base layer.
5. The decorative member according to claim 1, wherein the pattern layer includes a thermosetting resin or an ultraviolet curable resin.
6. The decorative member of claim 1, further comprising a colored dye inside or under the pattern layer.
7. The method of claim 1, wherein the inorganic layer is indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), Among vanadium (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nb), iron (Fe), chromium (Cr), cobalt (Co), gold (Au) and silver (Ag) A decorative member which is a single layer or a multilayer comprising one or two or more materials selected, oxides, nitrides or oxynitrides thereof, one or two or more of carbon and carbon composite materials.
8. The decorative member according to claim 1, wherein the surface of the pattern layer has a shape in which a second convex portion having a smaller height than the convex portion is further disposed between the convex portions.
9. The decorative member according to claim 8, wherein the height of the second convex portion is in the range of 1/5 to 1/4 of the height of the convex portion.
10. The decorative member according to claim 1, wherein the surface of the pattern layer further has a concave portion where the tip portion of the convex portion is smaller in height than the convex portion.
11. The decorative member according to claim 10, wherein the concave portion includes two inclined surfaces having different inclination angles.
12. The decorative member of claim 1, wherein the pattern layer includes a first region having a larger inclination angle of the second inclined surface than a first inclined surface and a second region having a large inclination angle of the second inclined surface relative to the first inclined surface.
13. Fabrication of a decorative member comprising depositing first and second inorganic layers, respectively, on the first and second inclined surfaces of the pattern layer including the convex-shaped surfaces including first and second inclined surfaces having different inclination angles. Way.
14. The method of claim 13, wherein the deposition of the first and second inorganic layers is performed by a sputtering method or an evaporation method.
15. The method of claim 13, wherein the first and second inorganic layers are deposited to have different thicknesses.
16. The method of claim 13, wherein the first and second inorganic layers are deposited from different materials.

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