TW201516789A - Composite substrate - Google Patents

Abstract

A composite substrate including a first substrate portion, a second substrate portion and a first hard coat layer is provided. The second substrate portion is disposed on the first substrate portion. In the same thickness, the flexibility of the second substrate portion is worse than the flexibility of the first substrate portion. The first hard coating layer is disposed on the second substrate portion, and the second substrate portion is located between the first hard coat layer and the first substrate portion, wherein a recess structure is formed on a first surface of the composite substrate, the recess structure is corresponding to a periphery region of the composite substrate and passes through the first hard coat layer and the second substrate portion. A composite substrate is also provided, wherein side surfaces of the first hard coat layer and the second substrate portion constitute a smooth side surface.

Description

Composite substrate

The present invention relates to a substrate, and more particularly to a composite substrate.

In recent years, with the rapid development of digital information and wireless mobile communication technologies, many electronic products, such as mobile phones, tablet PCs, or smart phones, use touch. The Touch Panel is used as an input interface to enhance its operational convenience. The touch panel can be roughly classified into a resistive type, a capacitive type, an optical type, an acoustic wave type, and an electromagnetic type according to the sensing method. The capacitive touch panel has the advantages of fast response time, good reliability, and high durability. It is widely used in electronic products.

Currently, capacitive touch panels are mostly one glass solution (OGS) touch panels. As electronic devices or display devices with touch panels have gradually moved toward large-sized designs, one-piece plastic (OPS) touch panels have gradually become the focus of attention. The single-piece plastic touch panel uses a flexible substrate as a main body to make the touch panel have a thin and light size. However, the current flexible substrate still has a number of disadvantages in the manufacturing process of the touch panel. For example, since a flexible substrate also needs to have considerable strength, a flexible substrate is usually used in the table. The surface is provided with a hard coating layer or a high hardness material (for example, polymethyl methacrylate (PMMA) or a cyclic olefin copolymer (COC)) to form a composite substrate. When a high temperature process is required, the composite substrate is liable to accumulate stress due to the different expansion scales of the layers. If the edge of the composite substrate is cracked due to cutting or other reasons during the manufacturing process before the high-temperature process, the subsequent high-temperature process causes the crack to expand into the interior of the composite substrate due to stress, thereby causing the manufacturing yield of the touch panel to decrease. . Of course, when the composite substrate is applied to other devices, the crack will be internally expanded to cause a decrease in yield.

The present invention provides a composite substrate which can prevent cracks located on the sides thereof from spreading to the inside thereof, thereby improving the manufacturing yield.

The invention provides a composite substrate comprising a first substrate portion, a second substrate portion and a first hardened layer. The second substrate portion is disposed on the first substrate portion, and the flexibility of the second substrate portion is inferior to the flexibility of the first substrate portion at the same thickness. The first hardened layer is disposed on the second substrate portion, and the second substrate portion is between the first hardened layer and the first substrate portion, wherein a first surface of the composite substrate provided with the first hardened layer is provided with a groove structure. The groove structure corresponds to a surrounding area of the composite substrate and penetrates the first hardened layer and the second substrate portion.

The invention further provides a composite substrate comprising a first substrate portion, a second substrate portion and a first hardened layer. The second substrate portion is disposed on the first substrate portion, Also, at the same thickness, the flexibility of the second substrate portion is inferior to the flexibility of the first substrate portion. The first hardened layer is disposed on the second substrate portion, and the second substrate portion is located between the first hardened layer and the first substrate portion, wherein a side surface of the first hardened layer and a side surface of the second substrate portion form a smooth side surface, which is smooth The trajectory variation of the side is less than 15 μm, wherein the trajectory variation is defined as a first point of the smooth side surface closest to the side and the farthest side when the smooth side is substantially parallel to one side of the first substrate portion. The distance between a second point.

In an embodiment of the invention, the groove structure has an inner side surface and an outer side surface, and the outer side surface is located between the inner side surface and one side of the composite substrate. The inner side surface is a smooth side surface, and the trajectory variation of the smooth side surface is less than 15 μm, wherein the trajectory variation is defined as a first one of the smooth side surfaces closest to the side when the smooth side surface is substantially parallel to the side of the first substrate portion. The distance between the point and a second point that is furthest from the side.

In an embodiment of the invention, the first substrate portion is made of polycarbonate (PC).

In an embodiment of the invention, the second substrate portion is made of polymethyl methacrylate (PMMA) or a cyclic olefin copolymer (COC).

In an embodiment of the invention, the surface of the first hardened layer has a pencil hardness higher than H.

In an embodiment of the invention, the total thickness of the first hardened layer and the second substrate portion is less than 150 micrometers (μm).

In an embodiment of the invention, the groove structure has a depth of less than 150 microns.

In an embodiment of the invention, the groove structure has a width of about 30 microns.

In an embodiment of the invention, the groove structure surrounds the entire surrounding area of the composite substrate.

In an embodiment of the invention, the groove structure is a continuous annular groove and forms a continuous closed path in the surrounding area.

In an embodiment of the invention, the groove structure comprises a plurality of strip-shaped grooves that are discontinuous.

In an embodiment of the invention, the strip-shaped grooves are arranged in a plurality of rows, the strip-shaped grooves of the same column are separated from each other by a pitch, and at least one of the strip-shaped grooves of the other column is disposed corresponding to the pitch.

In an embodiment of the invention, the composite substrate further includes a filling material disposed in the recess structure, wherein the refractive index of the filling material is close to the refractive index of the second substrate portion.

In an embodiment of the invention, the composite substrate further includes a second hardened layer disposed on the first substrate portion, and the first substrate portion is between the second hardened layer and the second substrate portion.

In an embodiment of the invention, the second substrate portion includes a substrate and a plurality of fiber structures distributed in the substrate.

In an embodiment of the invention, the material of the substrate is the same as the first The substrate portion.

In an embodiment of the invention, the composite substrate has a light transmissive area, and the surrounding area is located on at least one side of the light transmissive area. The composite substrate further includes a decorative layer disposed on the first side of the composite substrate or a second side opposite to the first surface and corresponding to the surrounding area.

In an embodiment of the invention, the composite substrate further includes a touch sensing structure, and the touch sensing structure is disposed on the second surface and corresponds to at least the light transmitting region.

In an embodiment of the invention, the composite substrate further includes a carrier. The decorative layer is disposed on the carrier and is attached to the first or second surface of the composite substrate by a carrier corresponding to the surrounding area.

Based on the above, the composite substrate provided by the present invention is provided with a groove structure on a first surface on which the first hardened layer is disposed, wherein the groove structure corresponds to a surrounding area of the composite substrate, and penetrates the first hardened layer and the second substrate portion . Further, the side surface of the first hardened layer and the side surface of the second substrate portion of the other composite substrate proposed by the present invention constitute a smooth side surface, and the track variation of the smooth side surface is less than 15 μm. Accordingly, the composite substrate can be prevented from being spread inward by cracks on the sides thereof by the groove structure or the smooth surface, thereby improving the manufacturing yield.

The above described features and advantages of the invention will be apparent from the following description.

100, 100a, 100b, 100c, 100d, 100e, 100f, 100g, 100h, 200, 200a, 200b‧‧‧ composite substrate

102, 202‧‧‧ first side

103, 203‧‧‧ second side

104, 104a, 104b, 104c‧‧‧ groove structure

1042, 1048‧‧‧ strip grooves

1044, 1046‧‧‧ linear grooves

106, 206‧‧‧ surrounding area

107, 204‧‧‧Light transmission area

108‧‧‧ side

110, 210‧‧‧ First substrate

120, 120a, 220, 220a‧‧‧ second substrate

122, 222‧‧‧ matrix

124, 224‧‧‧ fiber structure

130, 230‧‧‧ first hardened layer

140, 240‧‧‧ second hardened layer

150‧‧‧Filling materials

160, 250‧‧‧ decorative layer

170‧‧‧ board

180‧‧‧Adhesive layer

190a, 190b, 190c‧‧‧ touch sensing structure

192a, 192b, 192c‧‧‧ first electrode unit

194a, 194b, 194c‧‧‧ second electrode unit

C‧‧‧Rift

D‧‧‧ spacing

D‧‧‧depth

P1‧‧‧ first point

P2‧‧‧ second point

S1‧‧‧ inside

S2‧‧‧ outside side

S3, S4‧‧‧ side

Ss‧‧‧Smooth side

T‧‧‧ total thickness

V‧‧‧ trajectory variation

W‧‧‧Width

1 is a schematic plan view of a composite substrate according to an embodiment of the present invention.

2 is a side elevational view of the composite substrate of FIG. 1.

3 is a partial cross-sectional enlarged view of the composite substrate of FIG. 2.

4 is a partial top view of the composite substrate of FIG. 1 in region A, and showing the trajectory variation of the smooth side of FIG.

FIG. 5A is a schematic view showing cracks on the side of the composite substrate of FIG. 1. FIG.

FIG. 5B is a schematic view showing the groove structure of the composite substrate of FIG. 5A preventing the side cracks from expanding inward. FIG.

6 is a top plan view of a composite substrate according to another embodiment of the present invention.

Fig. 7 is a partially enlarged plan view showing a composite substrate according to still another embodiment of the present invention.

Fig. 8 is a partially enlarged plan view showing a composite substrate according to still another embodiment of the present invention.

Figure 9 is a side elevational view of a composite substrate in accordance with a further embodiment of the present invention.

Figure 10 is a top plan view of a composite substrate in accordance with another embodiment of the present invention.

Figure 11 is a side elevational view of the composite substrate of Figure 10.

Figure 12 is a side elevational view of a composite substrate in accordance with still another embodiment of the present invention.

13 and 14 are schematic side views of a composite substrate according to another embodiment of the present invention.

15A-15C are top plan views of related embodiments of the composite substrate of Fig. 14.

Figure 16 is a top plan view of a composite substrate in accordance with still another embodiment of the present invention.

1 is a schematic plan view of a composite substrate according to an embodiment of the present invention. 2 is a side elevational view of the composite substrate of FIG. 1. Referring to FIG. 1 and FIG. 2 , in the embodiment, the composite substrate 100 includes a first substrate portion 110 , a second substrate portion 120 , a first hardened layer 130 , and a second hardened layer 140 . The second substrate portion 120 is disposed on the first substrate portion 110. The first hardened layer 130 is disposed on the second substrate portion 120 , and the second substrate portion 120 is located between the first hardened layer 130 and the first substrate portion 110 . The second hardened layer 140 is selectively disposed on the first substrate portion 110 , and the first substrate portion 110 is located between the second hardened layer 140 and the second substrate portion 120 .

In the present embodiment, the characteristics of the first substrate portion 110 and the second substrate portion 120 are such that the flexibility of the second substrate portion 120 is inferior to the flexibility of the first substrate portion 110 at the same thickness. The composite substrate 100 is, for example, a substrate for fabricating a touch panel, and particularly a substrate for fabricating a one-piece plastic (OPS) touch panel. The substrate used in such a touch panel must be flexible so that the design of the touch panel can be made thinner and lighter. However, since such a substrate is often disposed on the contact surface of the touch panel, the strength must be considered. Therefore, the substrate portion is made of a flexible substrate, for example, the first substrate portion 110 and the second substrate portion. A combination of 120 can be used to increase the strength of the composite substrate 100. In addition, the first hardened layer 130 and the second hardened layer 140 of the composite substrate 100 are respectively located outside the composite substrate 100 such that the first substrate portion 110 and the second substrate portion 120 are located at the first hardened layer 130 and the second hardened layer. Between 140, it can also be used to increase the strength of the composite substrate 100.

In this embodiment, the composite substrate 100 is provided with the first hardened layer 130 The first face 102 is provided with a groove structure 104. The first surface 102 of the composite substrate 100 is a surface of the composite substrate 100 corresponding to the first hardened layer 130. The groove structure 104 corresponds to the surrounding area 106 of the composite substrate 100 and is adjacent to the side 108 of the composite substrate 100 , and the groove structure 104 penetrates the first hard layer 130 and the second substrate portion 120 from the first surface 102 . Therefore, a portion of the first substrate portion 110 is exposed through the groove structure 104 penetrating the first hardened layer 130 and the second substrate portion 120, as shown in FIGS. 1 and 2. Further, in the present embodiment, the composite substrate 100 may further include a filling material 150. The filling material 150 is disposed in the groove structure 104, wherein the refractive index of the filling material 150 is close to the refractive index of the second substrate portion 120, but in other embodiments not shown, the filling may not be filled in the groove structure 104. The material 150, the present invention does not limit the configuration of the filler material 150.

3 is a partial cross-sectional enlarged view of the composite substrate of FIG. 2. 4 is a partial top view of the composite substrate of FIG. 1 in region A, and showing the trajectory variation of the smooth side of FIG. Referring to FIG. 1 to FIG. 4 , in the embodiment, the groove structure 104 has an inner side surface S1 and an outer side surface S2 , and the outer side surface S2 is located between the inner side surface S1 and the side edge 108 of the composite substrate 100 . The inner side surface S1 is a smooth side surface, and, as seen from the top view of FIG. 4, the trajectory variation V of the smooth side surface (inner side surface S1) is less than 15 μm, wherein the trajectory variation V means that the smooth side surface (inner side surface S1) is represented by a linear trajectory The degree of fluctuation of the linear trajectory. Therefore, the trajectory variation V is defined such that when the trajectory of the smooth side surface (inner side surface S1) is substantially parallel to the side edges 108 of the first substrate portion 110, the trajectory closest to the side edge 108 of the smooth side surface (inner side surface S1) The distance between the point P1 and the second point P2 farthest from the side 108 is as shown in FIG. Smoothing above The side surface (inner side surface S1) is substantially parallel to the side edges 108 of the first substrate portion 110, and is only used as a comparison reference by the side edges 108 of the first substrate portion 110 to clearly define the trajectory variation V of the smooth side surface, instead of using The side surface 108 of the first substrate portion 110 is paralleled to define a smooth side surface (inner side surface S1) of the present invention. Additionally, the distances described above are, for example, dimensions measured along a direction perpendicular to the side edges 108.

On the other hand, in the present embodiment, the material of the first substrate portion 110 is, for example, polycarbonate (PC), and the material of the second substrate portion 120 is, for example, polymethyl methacrylate (PMMA). Or a cyclic olefin copolymer (COC). The pencil hardness of the surface of the first hardened layer 130 may be higher than H. The groove structure 104 may penetrate through the first hard layer 130 and the second substrate portion 120 via, for example, laser processing at a location where the first face 102 of the composite substrate 100 corresponds to the surrounding region 106.

Further, the thickness of the first substrate portion 110 is larger than the second substrate portion 120 in this embodiment. The total thickness t of the first hardened layer 130 and the second substrate portion 120 is less than 150 micrometers. Since the groove structure 104 penetrates the first hardened layer 130 and the second substrate portion 120, in the present embodiment, the groove structure 104 has a depth d of less than 150 micrometers and a width W of about 30 micrometers. However, the present invention does not limit the material of the first substrate portion 110 and the second substrate portion 120, the total thickness t of the first hardened layer 130 and the second substrate portion 120, the depth d and the width W of the groove structure 104, which may Adjust according to actual needs.

FIG. 5A is a schematic view showing cracks on the side of the composite substrate of FIG. 1. FIG. FIG. 5B is a schematic view showing the groove structure of the composite substrate of FIG. 5A preventing the side cracks from expanding inward. FIG. Referring to FIG. 5A and FIG. 5B, when the composite substrate 100 is subjected to a high temperature process, Since the material of each of the substrate portions of the composite substrate 100 and the respective hardened layers may be different, it is easy to accumulate stress due to the difference in expansion scale in the high-temperature process. If the composite substrate 100 has been damaged by the composite substrate 100 during the processing before the high temperature process (for example, cutting the composite substrate 100), for example, the crack C at the side 108 as shown in FIG. 5A, the subsequent high temperature process will occur. The crack C is spread to the inside of the composite substrate 100 due to the stress accumulated on the composite substrate 100.

At this time, since the first surface 102 of the composite substrate 100 of the present embodiment is provided with the groove structure 104 corresponding to the surrounding area 106, when the crack C is expanded from the side 108 of the composite substrate 100 to the inside of the composite substrate 100, The groove structure 104 penetrating the first hardened layer 130 and the second substrate portion 120 can effectively block the expansion of the crack C, as shown in FIG. 5B, thereby improving the manufacturing yield of the composite substrate 100.

Referring to FIG. 1 , FIG. 5A and FIG. 5B , in the embodiment, the groove structure 104 located on the first surface 102 surrounds the entire surrounding area 106 of the composite substrate 100 . In particular, the groove structure 104 is a continuous annular groove and forms a continuous closed path in the surrounding area 106. Therefore, regardless of which portion of the side 108 of the composite substrate 100 the crack C appears, the groove structure 104 which constitutes a continuous closed path in the peripheral region 106 can effectively prevent the crack C from expanding toward the inside of the composite substrate 100. However, the present invention does not limit the shape of the groove structure 104, nor does it restrict the groove structure 104 from surrounding the entire surrounding area 106 of the composite substrate 100, which may be adjusted according to actual needs, as shown in FIGS. 6 to 8 described later.

6 is a top plan view of a composite substrate according to another embodiment of the present invention. Please refer to FIG. 6. In the embodiment of FIG. 6, the groove structure 104a of the composite substrate 100a is packaged. A plurality of strip grooves 1042 are included. The strip-shaped recesses 1042 respectively correspond to a plurality of side edges of the composite substrate 100a, for example, four sides corresponding to the rectangular composite substrate 100a, wherein the adjacent two-shaped recesses 1042 are interlaced with each other so that the first one is located at the first The groove structure 104a of the face 102 surrounds the entire surrounding area 106 of the composite substrate 100a and forms a continuous closed path in the surrounding area 106. Therefore, the groove structure 104a of the composite substrate 100a can effectively prevent the crack C (FIG. 5B) located at the side 108 of the composite substrate 100a from expanding toward the inside of the composite substrate 100a.

Fig. 7 is a partially enlarged plan view showing a composite substrate according to still another embodiment of the present invention. Referring to FIG. 7, in the embodiment of FIG. 7, the groove structure 104b of the composite substrate 100b may be a continuous annular groove. The groove structure 104b positioned on the first side 102 is alternately connected by the linear groove 1044 and the linear groove 1046 to form a bent structure, and surrounds the entire surrounding area 106 of the composite substrate 100b to constitute a continuous area in the surrounding area 106. Closed path. Here, the linear groove 1044 and the linear groove 1046 each have a different extending direction.

Fig. 8 is a partially enlarged plan view showing a composite substrate according to still another embodiment of the present invention. Referring to FIG. 8, in the embodiment of FIG. 8, the groove structure 104c of the composite substrate 100c includes a plurality of strip-shaped grooves 1048 that are discontinuous. The strip-shaped recesses 1048 are arranged in a plurality of rows, the strip-shaped recesses 1048 of the same column are separated from each other by a spacing D, and at least one of the strip-shaped recesses 1048 of the other column is disposed corresponding to the spacing D.

Figure 9 is a side elevational view of a composite substrate in accordance with a further embodiment of the present invention. Referring to FIG. 9, in the present embodiment, the main difference between the composite substrate 100d and the composite substrate 100 is that the second substrate portion 120a of the composite substrate 100d includes the substrate 122 and the sub-board. A plurality of fibrous structures 124 disposed in the matrix 122. The material of the substrate 122 may be the same as the first substrate portion 110, for example, polycarbonate, and the material of the fiber structure 124 of the second substrate portion 120a is, for example, glass fiber or polymer material fiber.

The second substrate portion 120a and the first substrate portion 110 can be fabricated in a continuous process, for example, by first mixing glass fibers in a liquid polycarbonate to form a second substrate portion 120a including a substrate 122 and a fiber structure 124, and More liquid polycarbonate is continuously applied or dropped onto the second substrate portion 120a to form the first substrate portion 110.

After the first hardened layer 130 is formed on the second substrate portion 120a, the groove structure 104 can be formed at the first surface 102 of the composite substrate 100d corresponding to the surrounding region 106 via laser processing. Although the material of the substrate 122 is the same as that of the first substrate portion 110, since the fiber structure 124 is also present in the substrate 122, it can be achieved that the flexibility of the second substrate portion 120a is inferior to that of the first substrate portion 110 at the same thickness. Flexibility to increase the strength of the composite substrate 100d. Of course, in other embodiments, the substrate 122 of the second substrate portion 120a and the first substrate portion 110 may have different materials, and the second substrate portion 120a and the first substrate portion 110 may be coextruded or pasted. The way they are stacked together.

Figure 10 is a top plan view of a composite substrate in accordance with another embodiment of the present invention. Figure 11 is a side elevational view of the composite substrate of Figure 10. Referring to FIG. 10 and FIG. 11 , in the embodiment, the composite substrate 200 includes a first substrate portion 210 , a second substrate portion 220 , a first hardened layer 230 , and a second hardened layer 240 . The second substrate portion 220 is disposed on the first substrate portion 210. The first hardened layer 230 is disposed on the second substrate portion 220, and The two substrate portions 220 are located between the first hardened layer 230 and the first substrate portion 210. The second hardened layer 240 is disposed on the first substrate portion 210 , and the first substrate portion 210 is located between the second hardened layer 240 and the second substrate portion 220 . The characteristics of the first substrate portion 210 and the second substrate portion 220 are such that the flexibility of the second substrate portion 220 is inferior to the flexibility of the first substrate portion 210 at the same thickness. For the description of the first substrate portion 210 and the second substrate portion 220, reference may be made to the aforementioned first substrate portion 110 and second substrate portion 120.

In the present embodiment, the composite substrate 200 is substantially formed by the step of cutting or forming a lead angle, etc., wherein the composite substrate 100 is cut into a size defined by the groove structure 104. The composite substrate 200 of this embodiment. Here, the side surface S3 of the first hardened layer 230 and the side surface S4 of the second substrate portion 220 are exposed to the outside and constitute a smooth side surface Ss, and the track variation V of the smooth side surface Ss is less than 15 μm, wherein the definition of the track variation V can be referred to FIG. The related descriptions of the foregoing are not described here. That is, the smooth side surface Ss of the present embodiment can be regarded as the inner side surface S1 of the foregoing embodiment. According to the foregoing embodiment, it is understood that the smooth surface Ss is formed by laser processing, and the crack C as shown in FIG. 5A can be effectively prevented from expanding into the inside of the composite substrate 200, thereby improving the manufacturing yield of the composite substrate 200.

In the present embodiment, the material of the first substrate portion 210 is, for example, polycarbonate, and the material of the second substrate portion 220 is, for example, polymethyl methacrylate or a cycloolefin copolymer. Further, the surface hardness of the surface of the first hardened layer 230 may be higher than H. The thickness of the first substrate portion 210 is greater than the thickness of the second substrate portion 220, and the total thickness t of the first hardened layer 230 and the second substrate portion 220 is less than 150 microns. However, the present invention does not limit the materials of the first substrate portion 210 and the second substrate portion 220, and the first substrate portion. 210, the thickness of the first hardened layer 230 and the second substrate portion 220, which can be adjusted according to actual needs.

For example, FIG. 12 is a side view of a composite substrate according to still another embodiment of the present invention. Referring to FIG. 12, in the present embodiment, the main difference between the composite substrate 200a and the composite substrate 200 is that the second substrate portion 220a of the composite substrate 200a includes a substrate 222 and a plurality of fiber structures 224 distributed in the substrate 222. The material of the substrate 222 may be the same as the first substrate portion 210, for example, polycarbonate, and the material of the fiber structure 224 of the second substrate portion 220a is, for example, glass fiber or polymer material fiber. For the composition and manufacturing method of the first substrate portion 210 and the second substrate portion 220a of the composite substrate 200a, refer to the composition and manufacturing method of the first substrate portion 110 and the second substrate portion 120a of the composite substrate 100d described above, and the description thereof will not be repeated here. .

Therefore, the present invention does not limit the material and formation manner of the first substrate portion and the second substrate portion of the composite substrate, as long as the characteristics of the first substrate portion and the second substrate portion of the composite substrate conform to the same thickness, and second The flexibility of the substrate portion is inferior to the flexibility of the first substrate portion, and the pencil hardness of the surface of the first hardened layer is greater than H, so that the design of the present invention can be applied to the above composite substrate to prevent the position on the composite substrate. The cracks on the sides or the periphery extend to the inside to affect the manufacturing yield.

13 and 14 are schematic side views of a composite substrate according to another embodiment of the present invention. 15A-15C are top plan views of related embodiments of the composite substrate of Fig. 14. Referring to FIG. 13 , FIG. 14 and FIG. 15A , in the present embodiment, the structures of the composite substrates 100 e and 100 f are substantially similar to those of the composite substrate 100 of FIGS. 1 and 2 , the main difference being that the composite substrates 100 e and 100 f include Component of composite substrate 100 (the first substrate portion 110, the second substrate portion 120, the first hardened layer 130, the second hardened layer 140, and the filling material 150 as shown in FIG. 2) and features (the first surface 102 is provided corresponding to the surrounding region 106 In addition to the groove structure 104) of the side edges 108, the composite substrates 100e and 100f also have a light transmitting region 107. The foregoing surrounding area 106 is located on at least one side of the light-transmitting area 107. For example, the surrounding area 106 of FIG. 15A is an example of the surrounding light-transmitting area 107. However, the present invention is not limited thereto, and the surrounding area 106 of other embodiments is also It may be located only on opposite sides of the light transmitting region 107.

In the embodiment of FIGS. 13 and 14, the composite substrates 100e and 100f further include a decorative layer 160. First, in the embodiment of FIG. 13, the decorative layer 160 is disposed on the composite substrate 100e with the first face 102 of the first hardened layer 130 disposed, and corresponds to the surrounding region 106. As such, when the composite substrate 100e is applied to a fabrication panel (not shown), such as a touch panel or display panel, the decorative layer 160 can be used to shield the traces within the panel. However, the present invention is not limited to disposing the decorative layer 160 on the first side 102. In the embodiment of Fig. 14, the composite substrate 100f is also provided with the decorative layer 160. The difference from the composite substrate 100e of FIG. 13 is that the decorative layer 160 of the composite substrate 100f is disposed on the second surface 103 with respect to the first surface 102 and corresponds to the surrounding area 106. The second face 103 described herein refers to a surface of the composite substrate 100f corresponding to the second hardened layer 140. Accordingly, the present invention is not limited to disposing the decorative layer 160 on the first side 102 or the second side 103 of the composite substrate, which can be adjusted as needed. On the other hand, the decorative layer 160 of the present embodiment is exemplified by the entire surrounding area 106, wherein the corresponding surrounding area 106 means that the decorative layer 160 extends inwardly from the side 108 of the composite substrate 100e and spans the groove structure. 104. However, the present invention does not For the sake of limitation, the decorative layer of other embodiments may also be disposed only in a portion of the surrounding area 106, for example, extending from the edge corresponding to the groove structure 104 toward the light transmitting area 107 without obscuring the groove structure 104. . That is, as long as the decorative layer 160 conforms to the condition of the surrounding area 106, its actual size and position can be adjusted according to actual needs. In addition, a top view of the composite substrate 100e of FIG. 13 and the composite substrate 100f of FIG. 14 can be referred to FIG. 15A, wherein FIG. 15A is only used to illustrate the decorative layer 160 of the composite substrate 100f of the present invention corresponding to the surrounding area 106, the size of which is The ratio is not the actual size ratio. For example, in practice the groove structure 104 should be closer to the side edges 108 than in the middle of the decorative layer 160 as shown in Figure 15A.

Furthermore, in the embodiment of FIGS. 13 and 14, the composite substrates 100e and 100f further include a carrier 170. The decorative layer 160 is disposed on the carrier 170 and is attached to the first surface 102 by the carrier 170 corresponding to the surrounding area 106 of the composite substrate 100e, or is attached by the carrier 170 corresponding to the surrounding area 106 of the composite substrate 100f. Attached to the second side 103. Further, the decorative layer 160 may be fabricated on the carrier 170 in advance. Thereafter, the carrier 170 provided with the decorative layer 160 is attached to the first face 102 or the second face 103 with the adhesive layer 180, and the decorative layer 160 corresponds to the peripheral region 106. The adhesive layer 180 may completely cover the decorative layer 160 and a portion of the surface of the carrier 170 on which the decorative layer 160 is not disposed to prevent air from entering the composite substrates 100e and 100f, or may be disposed only on the decorative layer 160. In addition, the present invention does not limit the method of the decorative layer 160. It may be directly formed on the first surface 102 or the second surface 103 and corresponds to the peripheral region 106, and the arrangement carrier 170 and the adhesive layer 180 are omitted.

Referring to FIG. 14 and FIG. 15A, in the embodiment, the composite substrate 100f The touch sensing structure 190a is further included. The touch sensing structure 190 a is disposed on the second surface 103 and corresponds to at least the light transmitting region 107 . Specifically, the touch sensing structure 190a includes a first electrode unit 192a and a second electrode unit 194a extending in two intersecting directions, wherein FIG. 15A only shows a portion of the first electrode unit 192a and a portion of the second electrode unit 194a. By way of illustration, the touch sensing structure 190a may have a plurality of first electrode units 192a and a plurality of second electrode units 194a. The touch sensing structure 190a of this embodiment is, for example, a mutual inductance type electrode structure. That is, when the composite substrate 100f is used as the touch panel and the first hardened layer 130 corresponding to the first surface 102 is used as the touch surface, the first electrode unit 192a and the second electrode unit 194a may be disposed on the composite substrate 100e. The second surface 103, and the intersection of the first electrode unit 192a and the second electrode unit 194a is separated by an insulating material (not shown), and one of the first electrode unit 192a and the second electrode unit 194a spans the insulating material to The first electrode unit 192a and the second electrode unit 194a are electrically insulated from each other. Alternatively, one of the first electrode unit 192a and the second electrode unit 194a may be disposed on the second surface 103 of the composite substrate 100e, and the other of the first electrode unit 192a and the second electrode unit 194a may be disposed on another substrate ( Not shown), and the composite substrate 100f is covered on the substrate. In other words, the present invention does not limit the actual fabrication of the electrode structure, which can be adjusted as needed. Accordingly, the composite substrate 100f can function as a touch panel, wherein a trace (not shown) for connecting the first electrode unit 192a and the second electrode unit 194a can extend from the first electrode unit 192a or the second electrode unit 194a to The surrounding area 106 is shielded by the decorative layer 160 to prevent the user from perceiving the trace from the outside of the composite substrate 100e, thereby affecting the appearance of the touch panel. In addition, the composite of the embodiment The composite substrate 100 in the substrate 100f may be replaced with the composite substrates 100a to 100d of FIGS. 6 to 9 as needed, and the decorative layer 160 and the touch sensing structure 190a may be disposed thereon. Alternatively, the touch sensing structure 190a may be disposed on the composite substrate 100e of FIG. 13 with reference to the composite substrate 100f of FIG. 15A. However, the present invention does not limit the types of touch sensing structures, and other touch sensing structures will be described below.

Referring to FIG. 15B, in the embodiment, the composite substrate 100g may be provided with a decorative layer 160 as shown in the composite substrate 100f shown in FIG. 14 or the composite substrate 100e shown in FIG. 13, and the decorative layer 160 may also be supported by the carrier. The adhesive layer 180 and the adhesive layer 180 are attached to the second surface 103 of the composite substrate 100f or the first surface 102. The main difference between the composite substrate 100g and the composite substrate 100f described above is that the composite substrate 100g includes a touch sensing structure 190b disposed on the second surface 103 and corresponding to at least the light-transmitting region 107. Specifically, the touch sensing structure 190b includes a first electrode unit 192b and a second electrode unit 194b, wherein FIG. 15B only shows a portion of the first electrode unit 192b and a portion of the second electrode unit 194b as an illustration, but actually touches The control sensing structure 190b may have a plurality of first electrode units 192b and a plurality of second electrode units 194b. The touch sensing structure 190b of this embodiment is, for example, a mutual inductance single layer electrode structure. That is, the first electrode unit 192b and the second electrode unit 194b may be disposed on the second surface of the composite substrate 100g, and the first electrode unit 192b and the second electrode unit 194b are separated from each other and electrically insulated. Accordingly, the composite substrate 100g can be used as a touch panel, wherein the trace for connecting the first electrode unit 192b and the second electrode unit 194b can extend to the surrounding area 106 and be shielded by the decorative layer 160 to avoid affecting the touch. The appearance of the panel. Similarly, the composite substrate 100 in the composite substrate 100g of the present embodiment can also The decorative substrate 160 is disposed on the second surface 103 or the first surface 102 according to the composite substrate 100a to 100d of FIG. 6 to FIG. 9 and will not be described here.

Referring to FIG. 15C, in the embodiment, the composite substrate 100h may be provided with a decorative layer 160 as shown in the composite substrate 100f shown in FIG. 14 or the composite substrate 100e shown in FIG. 13, and the decorative layer 160 may also be supported by the carrier. 170 and the adhesive layer 180 are attached to the second surface 103 of the composite substrate 100h or the first surface 102. The main difference between the composite substrate 100h and the above-described composite substrates 100f and 100g is that the composite substrate 100h includes a touch sensing structure 190c disposed on the second surface 103 and corresponding to at least the light-transmitting region 107. The touch sensing structure 190c includes a first electrode unit 192c and a second electrode unit 194c. Although FIG. 15C only shows a portion of the first electrode unit 192c and a portion of the second electrode unit 194c as a schematic, the touch sensing structure is actually The 190c may have a plurality of first electrode units 192c and a plurality of second electrode units 194c. The touch sensing structure 190c of this embodiment is, for example, a mutual inductance single layer electrode structure. That is, the first electrode unit 192c and the second electrode unit 194c may be disposed on the second surface 103 of the composite substrate 100h, and the first electrode unit 192c and the second electrode unit 194c are separated from each other and electrically insulated. Accordingly, the composite substrate 100h can serve as a touch panel, wherein the trace for connecting the first electrode unit 192c and the second electrode unit 194c can extend to the surrounding area 106 and be shielded by the decorative layer 160 to avoid affecting the touch. The appearance of the panel. Similarly, the composite substrate 100 in the composite substrate 100h of the present embodiment may be replaced with the composite substrates 100a to 100d of FIG. 6 to FIG. 9 and the decorative layer 160 may be disposed on the first surface 102 or the second surface 103 thereof. I will not repeat them here. In addition, the touch sensing structure 190c and the touch sensing structure 190b are also mutually inductive single-layer electrode structures. The difference is that the number of the first electrode unit and the second electrode unit corresponding to each other is different. Each of the first electrode units 192c of the touch sensing structure 190c corresponds to one second electrode unit 194c, but each of the first electrode units 192b of the touch sensing structure 190b corresponds to the four second electrode units 194b. As such, the sensing performance of the two has a difference, but the present invention does not limit which touch sensing structure should be used for the composite substrate. In other words, any suitable touch sensing structure can be applied to the composite substrate of the present invention.

Figure 16 is a top plan view of a composite substrate in accordance with still another embodiment of the present invention. Referring to FIG. 16, in the present example, the structure of the composite substrate 200b is substantially similar to that of the composite substrate 200 of FIGS. 10 and 11, the main difference being that the composite substrate 200b includes components other than the composite substrate 200 (as shown in FIG. 11). The first substrate portion 210, the second substrate portion 220, the first hardened layer 230, the second hardened layer 240, and the like) and features (the side surface S3 of the first hardened layer 230 and the side of the second substrate portion 220 as shown in FIG. 11) The composite substrate 200b further includes a decorative layer 250 in addition to the smooth side Ss). Specifically, the composite substrate 200b has a light transmitting region 204 and a surrounding region 206 located on at least one side of the light transmitting region 204. For example, the surrounding region 206 of FIG. 16 is an example of the surrounding light transmitting region 204, but the present invention does not This is a limitation. The decorative layer 250 is disposed on the first surface 202 of the composite substrate 200b or the second surface 203 opposite to the first surface 202, and corresponds to the surrounding area 206, wherein the first surface 202 refers to the composite substrate 200b configured with the first hardened layer 230 The surface (shown in FIG. 11) refers to the surface of the composite substrate 200b on which the second hardened layer 240 (shown in FIG. 11) is disposed. As such, the decorative layer 250 can shield the traces within the panel when the composite substrate 200b is applied to a panel (not shown). In addition, the decorative layer 250 of the embodiment is configured The entire surrounding area 206 is exemplified, wherein the entire surrounding area 206 means that the decorative layer 250 extends inward from the smooth side Ss of the composite substrate 200b and covers the smooth side Ss. However, the decorative layer of other embodiments may also be disposed only in a portion of the surrounding area 206, such as not covering the smooth side Ss or only the partially smooth side Ss. Furthermore, the decorative layer 250 of the present embodiment may be disposed on the carrier 170 as the decorative layer 160 illustrated in FIG. 15A, and attached to the composite substrate 200b by the adhesive layer 180 corresponding to the surrounding area 206 of the composite substrate 200a. The two faces 203 or the first face 202 may also be disposed directly on the surrounding area 206. Similarly, the touch sensing structure (not shown) may be disposed on the composite substrate 200b. The touch sensing structure is disposed on the second surface 203 and corresponds to at least the light transmitting area 204. The touch sensing structure may be as One of the touch sensing structures 190a to 190c shown in FIG. 15A to FIG. 15C or other suitable touch sensing structures, the present invention does not limit the types of touch sensing structures. Accordingly, the composite substrate 200b can be used as a touch panel. The traces (not shown) in the touch sensing structure can be extended to the surrounding area 206 and shielded by the decorative layer 250 to avoid affecting the appearance of the touch panel. .

It should be noted that in all the above embodiments, the phrase "provided on the first side or the second side of the substrate" or the like is merely used to explain the embodiment of the present invention, and the member is not limited. Must be in direct contact with the surface of the substrate. For example, the embodiment in which the “decorative layer 160 is disposed on the first surface 102 of the composite substrate” does not limit the decorative layer 160 to directly contact the first surface 102 of the composite substrate (the surface of the first hardened layer 130). In fact, other members (for example, optical films) may be disposed between the decorative layer 160 and the first hardened layer 130 as needed, and the invention is not limited thereto.

In summary, the composite substrate provided by the present invention is provided with a groove structure on a first surface of which the first hardened layer is disposed, the groove structure is located in a surrounding area of the first surface, and penetrates the first hardened layer and the first The two substrate portions, wherein the inner side surface of the groove structure is a smooth side surface, and the track variation of the smooth side surface is less than 15 μm. Further, the side surface of the first hardened layer and the side surface of the second substrate portion of the other composite substrate proposed by the present invention constitute a smooth side surface, and the track variation of the smooth side surface is less than 15 μm. According to this, the composite substrate can effectively prevent the cracks on the side edges from expanding to the inside by the smooth side surface formed on the inner side surface of the groove structure or the side surface of the first hardened layer and the side surface of the second substrate portion, thereby improving Create yield.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧Composite substrate

102‧‧‧ first side

104‧‧‧ Groove structure

106‧‧‧ surrounding area

108‧‧‧ side

110‧‧‧First substrate

120‧‧‧Second substrate unit

130‧‧‧First hardened layer

140‧‧‧Second hardened layer

150‧‧‧Filling materials

Claims (30)

A composite substrate comprising: a first substrate portion; a second substrate portion disposed on the first substrate portion, and at a same thickness, the flexibility of the second substrate portion is inferior to that of the first substrate portion And a first hardened layer disposed on the second substrate portion, wherein the second substrate portion is between the first hardened layer and the first substrate portion, wherein the composite substrate is provided with the first A first surface of the hardened layer is provided with a groove structure corresponding to a surrounding area of the composite substrate and extending through the first hardened layer and the second substrate portion. The composite substrate of claim 1, wherein the groove structure has an inner side surface and an outer side surface, the outer side surface being located between the inner side surface and one side of the composite substrate, the inner side surface being a a smooth side surface having a trajectory variation of less than 15 μm, wherein the trajectory variation is defined as a path of the smooth side that is closest to the side when the smooth side is substantially parallel to the side of the first substrate portion The distance between a first point and a second point that is furthest from the side. The composite substrate according to claim 1, wherein the material of the first substrate portion is polycarbonate (PC). The composite substrate according to claim 1, wherein the second substrate portion is made of polymethyl methacrylate (PMMA) or a cyclic olefin copolymer (COC). The composite substrate according to claim 1, wherein the surface of the first hardened layer has a pencil hardness higher than H. The composite substrate according to claim 1, wherein the total thickness of the first hardened layer and the second substrate portion is less than 150 micrometers (μm). The composite substrate of claim 6, wherein the groove structure has a depth of less than 150 microns. The composite substrate of claim 1, wherein the groove structure has a width of about 30 microns. The composite substrate of claim 1, wherein the groove structure surrounds the entire surrounding area of the composite substrate. The composite substrate of claim 9, wherein the groove structure is a continuous annular groove and forms a continuous closed path in the surrounding area. The composite substrate of claim 9, wherein the groove structure comprises a plurality of strip-shaped grooves that are discontinuous. The composite substrate according to claim 11, wherein the strip-shaped grooves are arranged in a plurality of rows, and the strip-shaped grooves of the same column are separated from each other by a distance, and the strip-shaped grooves of the other column are At least one corresponds to the spacing setting. The composite substrate of claim 1, further comprising a filler material disposed in the recess structure, wherein the filler material has a refractive index close to a refractive index of the second substrate portion. The composite substrate of claim 1, further comprising a second hardened layer disposed on the first substrate portion, wherein the first substrate portion is between the second hardened layer and the second substrate portion . The composite substrate of claim 1, wherein the second substrate The plate portion includes a matrix and a plurality of fibrous structures distributed in the matrix. The composite substrate according to claim 15, wherein the substrate is made of the same material as the first substrate portion. The composite substrate of claim 1, wherein the composite substrate has a light transmissive region, the peripheral region is located on at least one side of the light transmissive region, and the composite substrate further comprises a decorative layer, wherein the decorative layer is disposed on The first face of the composite substrate or a second face relative to the first face and corresponding to the surrounding area. The composite substrate of claim 17, further comprising: a touch sensing structure disposed on the second surface and corresponding to at least the light transmissive area. The composite substrate of claim 17, further comprising: a carrier plate disposed on the carrier plate and attached to the composite substrate by the carrier plate corresponding to the surrounding area One side or the second side. A composite substrate comprising: a first substrate portion; a second substrate portion disposed on the first substrate portion, and at a same thickness, the flexibility of the second substrate portion is inferior to that of the first substrate portion And a first hardened layer disposed on the second substrate portion, wherein the second substrate portion is located between the first hardened layer and the first substrate portion, wherein a side surface of the first hardened layer is The side surface of the second substrate portion constitutes a smooth side surface, and the track variation of the smooth side surface is less than 15 μm, wherein the track variation is defined as the smooth side surface when the smooth side surface is substantially parallel to one side of the first substrate portion. The closest to the side of the trajectory The distance between a first point and a second point farthest from the side. The composite substrate according to claim 20, wherein the material of the first substrate portion is polycarbonate. The composite substrate according to claim 20, wherein the material of the second substrate portion is polymethyl methacrylate or a cycloolefin copolymer. The composite substrate according to claim 20, wherein the surface of the first hardened layer has a pencil hardness higher than H. The composite substrate of claim 20, wherein the total thickness of the first hardened layer and the second substrate portion is less than 150 micrometers. The composite substrate of claim 24, further comprising a second hardened layer disposed on the first substrate portion, wherein the first substrate portion is between the second hardened layer and the second substrate portion . The composite substrate of claim 20, wherein the second substrate portion comprises a substrate and a plurality of fiber structures distributed in the substrate. The composite substrate according to claim 26, wherein the substrate is made of the same material as the first substrate portion. The composite substrate of claim 20, wherein the composite substrate has a light transmissive region and a surrounding region on at least one side of the light transmissive region, the composite substrate further comprising a decorative layer, the decorative layer configuration The composite substrate is provided with a first surface of the first hardened layer or a second surface opposite to the first surface, and corresponds to the surrounding area. The composite substrate according to claim 28, further comprising: A touch sensing structure is disposed on the second surface and corresponding to at least the light transmissive area. The composite substrate of claim 28, further comprising: a carrier plate disposed on the carrier plate and attached to the composite substrate by the carrier plate corresponding to the surrounding region One side or the second side.