TW202127114A - Display apparatus and manufacturing method thereof - Google Patents

Abstract

A display apparatus including a flexible substrate, a first wire, a second wire, and a plurality of slanted conductive structures is provided. The flexible substrate has a first surface and a second surface opposite to the first surface. The flexible substrate includes a display area and a flexible area. The first wire is disposed on the first surface of the flexible substrate. The first wire extends from the display area to the flexible area. The second wire is disposed on the second surface of the flexible substrate. The second wire is at least disposed in the flexible area. The plurality of slanted conductive structures are at least disposed in the flexible region and at least penetrate the flexible substrate. The plurality of diagonal conductive structures are electrically connected to the first wire and the second wire. A manufacturing method of a display apparatus is also provided.

Description

Display device and manufacturing method thereof

The present invention relates to a display device and a manufacturing method thereof, and more particularly to a display device having a plurality of diagonal conductive structures and a manufacturing method thereof.

In a display device with a flexible substrate, the flexible substrate may be curled or flexed by applying force due to application requirements. When the flexible substrate is crimped or flexed, how to reduce the possibility of damage or damage to the circuit on it, or the circuit on it can still have good transmission capacity as a whole, has become an urgent research topic at present. .

The present invention provides a display device and a manufacturing method thereof, which have better quality.

The display device of the present invention includes a flexible substrate, a first wire, a second wire, and a plurality of diagonal conductive structures. The flexible substrate has a first surface and a second surface opposite to the first surface. The flexible substrate includes a display area and a flexible area. The first wire is located on the first surface of the flexible substrate. The first wire extends from the display area to the flexible area. The second wire is located on the second surface of the flexible substrate. The second wire is at least arranged in the flexible area. The plurality of oblique conductive structures are at least arranged in the flexible area and penetrate at least the flexible substrate. The plurality of oblique conductive structures are electrically connected to the first wire and the second wire.

The manufacturing method of the display device of the present invention includes the following steps: providing a flexible substrate, which has a first surface and a second surface opposite to the first surface, and the flexible substrate includes a display area and a flexible area; A wire is on the first surface of the flexible substrate, and the first wire extends from the display area to the flexible area; a plurality of oblique through holes penetrating the flexible substrate are formed, and the plurality of oblique through holes are at least located The flexible area; and a conductive material is formed on the second surface and in the plurality of oblique through holes to form at least a second wire and a plurality of oblique conductive structures.

Based on the above, in the display device or its manufacturing method, the plurality of oblique conductive structures are arranged in the flexible area and penetrate the flexible substrate, and the plurality of oblique conductive structures are electrically connected to the flexible substrate. The first wire and the second wire on two opposite surfaces. In this way, the display device can have better quality.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings. As those skilled in the art would realize, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present invention.

In the drawings, the thickness of each element and the like are exaggerated for clarity. Throughout the specification, the same reference numerals denote the same elements. It should be understood that when an element such as a layer, film, region, or substrate is referred to as being “on”, “connected to,” or “overlapped on another element”, it may be directly on the other element. On or connected to another element, or intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements. As used herein, "connected" can refer to physical and/or electrical connections.

It should be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and/or parts, these elements, components, regions, and/or Or part should not be restricted by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Therefore, the "first element", "component", "region", "layer" or "portion" discussed below may be referred to as a second element, component, region, layer or section without departing from the teachings herein.

The terminology used here is only for the purpose of describing specific embodiments and is not restrictive. As used herein, unless the content clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms, including "at least one." "Or" means "and/or". As used herein, the term "and/or" includes any and all combinations of one or more of the related listed items. It should also be understood that when used in this specification, the terms "including" and/or "including" designate the presence of the features, regions, wholes, steps, operations, elements, and/or components, but do not exclude one or more The existence or addition of other features, regions as a whole, steps, operations, elements, components, and/or combinations thereof.

In addition, relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship between one element and another element, as shown in the figure. It should be understood that relative terms are intended to include different orientations of the device in addition to the orientation shown in the figures. For example, if the device in one figure is turned over, elements described as being on the "lower" side of other elements will be oriented on the "upper" side of the other elements. Therefore, the exemplary term "lower" may include an orientation of "lower" and "upper", depending on the specific orientation of the drawing. Similarly, if the device in one figure is turned over, elements described as "below" or "beneath" other elements will be oriented "above" the other elements. Thus, the exemplary terms "below" or "below" can include an orientation of above and below.

As used herein, "substantially" or "substantially" includes the stated value and the average value within the acceptable deviation range of the specific value determined by a person of ordinary skill in the art, taking into account the measurement in question and the error associated with the measurement The specific number (ie, the limit of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±10%, ±5%.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of related technologies and the present invention, and will not be interpreted as idealized or excessive The formal meaning, unless explicitly defined as such in this article.

The exemplary embodiments are described herein with reference to cross-sectional views that are schematic diagrams of idealized embodiments. Therefore, a change in the shape of the diagram as a result of, for example, manufacturing technology and/or tolerances can be expected. Therefore, the embodiments described herein should not be interpreted as being limited to the specific shape of the area as shown herein, but include, for example, shape deviations caused by manufacturing. For example, regions shown or described as flat may generally have rough and/or non-linear characteristics. In addition, the acute angles shown may be rounded. Therefore, the regions shown in the figures are schematic in nature, and their shapes are not intended to show the precise shape of the regions, and are not intended to limit the scope of the claims.

1A to 1C are schematic partial top views of a part of a manufacturing method of a display device according to a first embodiment of the present invention. 2A to 2C are schematic partial cross-sectional views of a part of a manufacturing method of a display device according to the first embodiment of the present invention. For example, FIG. 2A may be a schematic cross-sectional view corresponding to the section line II-II' in FIG. 1A, FIG. 2B may be a schematic cross-sectional view corresponding to the section II-II' in FIG. A schematic cross-sectional view on the section line III-III'.

1A and 2A, a flexible substrate 150 is provided. The flexible substrate 150 has a first surface 150a and a second surface 150b opposite to the first surface 150a. The flexible substrate 150 includes a display area 151, a first connection area 152, a flexible area 153 and a second connection area 154. The first connection area 152 may be located between the display area 151 and the flexible area 153. The flexible area 153 may be located between the first connection area 152 and the second connection area 154.

Please continue to refer to FIG. 1A and FIG. 2A, a first wire 110 is formed on the first surface 150 a of the flexible substrate 150. The first wire 110 may extend from the display area 151 to the flexible area 153 through the first connection area 152.

In an embodiment, the first patterned conductive layer 119 may be formed on the first surface 150a of the flexible substrate 150 by sputtering. Part of the patterned lines in the first patterned conductive layer 119 may constitute the first conductive line 110.

In an embodiment, the first patterned conductive layer 119 may have an opening 119a. In an embodiment, the opening 119a may penetrate part of the first wire 110.

In an embodiment, a driving element (not shown) suitable for driving the light-emitting element may be formed on the first surface 150 a of the flexible substrate 150. For example, a common semiconductor process can be used to form on the first surface 150a of the display area 151 suitable for driving light-emitting elements (such as light-emitting diodes; not shown) or electrodes (such as: driving liquid crystals to turn). Pixel electrode; not shown) thin film transistor (TFT).

In an embodiment, a part of the first wire 110 located in the display area 151 may be electrically connected to a corresponding driving element (not shown) or a light emitting element (not shown). For example, the first wire 110 may be electrically connected to the corresponding driving element or the light emitting element through a corresponding scan line, a corresponding data line, or a corresponding power line.

In this embodiment, there may be an insulating layer 160 between the first wire 110 and the flexible substrate 150, but the present invention is not limited thereto.

In an embodiment, the insulating layer 160 may be the same or similar to an insulating film layer called a buffer layer, an insulating film layer called a gate insulating layer (GI), or an insulating film layer called a gate insulating layer (GI). The insulating film layer of the planar layer (PL) or a combination of one or more of the above, but the present invention is not limited thereto.

Referring to FIGS. 1A to 1B and FIGS. 2A to 2B, a plurality of oblique through holes 180 penetrating the flexible substrate 150 are formed. The oblique through hole 180 is located at least in the flexible area 153. For example, the laser device 91 can be used to form a slope from the first surface 150a of the flexible substrate 150 through the flexible substrate 150 from the first surface 150a to the second surface 150b in the manner of laser burning. To through holes 180.

In this embodiment, the position of the oblique through hole 180 may correspond to a part of the opening of the first patterned conductive layer 119. That is, in terms of structure, a part of the opening of the first patterned conductive layer 119 may be a part of the oblique through hole 180.

In this embodiment, part of the oblique through holes 180 may be further located in the first connection area 152, but the present invention is not limited to this.

In this embodiment, the diameter 180a of the opening (which may be referred to as upper opening) of the oblique through hole 180 on the first surface 150a may be larger than the diameter of the opening (which may be referred to as lower opening) on the second surface 150b 180b.

In this embodiment, the included angle A1 between the extending direction 180d of the oblique through hole 180 and the first surface 150a is substantially between 30 degrees (degree; ∘) to 60∘ (that is, greater than or equal to 30∘, and less than Or equal to 60∘), and/or the included angle A2 between the extending direction 180d of the oblique through hole 180 and the second surface 150b is substantially between 30∘ to 60∘.

In this embodiment, the first surface 150a and the second surface 150b are substantially parallel, but the invention is not limited to this.

In an embodiment, the extending direction 181d of the oblique through hole 180 may be substantially a line from the midpoint C1 of the upper opening to the midpoint C2 of the lower opening (for example, the connection between the middle point C1 and the middle point C1 in FIG. 2B). The dotted line of point C2).

In this embodiment, the oblique through hole 180 may penetrate the insulating layer 160 further.

Referring to FIGS. 1B to 1C and FIGS. 2B to 2C, after the oblique through holes 180 are formed, a second patterned conductive layer 129 may be formed on the second surface 150b of the flexible substrate 150. Part of the patterned lines in the second patterned conductive layer 129 may constitute the second wire 120. In addition, part of the conductive material used to form the second patterned conductive layer 129 can be more filled in the diagonal through hole 180 to form the diagonal conductive structure 140 that penetrates at least the flexible substrate 150.

In one embodiment, a seed layer may be formed on the second surface 150b of the flexible substrate 150, and then an electroplated layer may be plated on the aforementioned seed layer by electroplating. The electroplating layer can be more filled in the oblique through hole 180. Moreover, after the patterning step is performed on the aforementioned seed layer and after the patterning step is performed on the aforementioned seed layer, the patterned seed layer and the patterned electroplating layer may constitute the second patterned conductive layer 129.

In this embodiment, the shape of the oblique conductive structure 140 may substantially correspond to the outline of the oblique through hole 180.

In this embodiment, the oblique conductive structure 140 may have top and bottom ends opposite to each other. The bottom end of the oblique conductive structure 140 may contact the second wire 120. The diameter width 140a of the top end of the oblique conductive structure 140 (the diameter width 140a may be referred to as the top diameter width) may be greater than the diameter width 140b of the bottom end of the oblique conductive structure 140 (the diameter width 140b may be referred to as the bottom diameter width) .

In this embodiment, the included angle A3 between the extending direction 140d of the oblique conductive structure 140 and the first surface 150a is substantially between 30∘ to 60∘, and/or the extending direction 140d of the oblique conductive structure 140 and the second The angle A4 between the surfaces 150b is substantially between 30∘ to 60∘. That is, the extension direction 140d of the oblique conductive structure 140 is not perpendicular to the first surface 150a and/or the second surface 150b.

In an embodiment, the extending direction 140d of the oblique conductive structure 140 may be substantially a line from the midpoint C3 of the top end to the midpoint C4 of the bottom end (for example, connecting midpoint C3 and midpoint C4 in FIG. 2C). Dotted line).

In one embodiment, the included angle between the extending direction 140d of the oblique conductive structure 140 and the first surface 150a or the second surface 150b (such as the included angle A3 or the included angle A4) may be substantially between 40∘ to 50∘, but The present invention is not limited to this.

In this embodiment, the oblique conductive structure 140 may further penetrate the film layer between the first conductive line 110 and the second conductive line 120. For example, the diagonal conductive structure 140 may further penetrate the insulating layer 160 between the first wire 110 and the second wire 120.

In this embodiment, the conductive material filled in the oblique through hole 180 can further cover the first surface 150a of the flexible substrate 150, and the third wire 130 covering the first wire 110 can be formed. In other words, the materials of the second wire 120, the diagonal conductive structure 140, and the third wire 130 may be substantially the same.

After at least the above-mentioned manufacturing method, the manufacturing of the display device 100 of this embodiment can be substantially completed.

FIG. 1C may be a schematic partial top view of a display device 100 according to the first embodiment of the present invention. FIG. 2C may be a schematic partial cross-sectional view of a display device 100 according to the first embodiment of the present invention. FIG. 3 is a schematic partial cross-sectional view of a display device 100 according to the first embodiment of the present invention. FIG. 4 is a schematic partial bottom view of a display device 100 according to the first embodiment of the present invention. FIG. 5 is a schematic top view of a display device 100 according to the first embodiment of the present invention. For example, FIG. 1C may be a schematic top view corresponding to area R1 in FIG. 5, FIG. 3 may be a schematic cross-sectional view corresponding to the section line IV-IV' in FIG. 1C, and FIG. 4 may be a bottom view corresponding to area R1 in FIG. See schematic diagram. In addition, the oblique conductive structure 140 may not be exactly on the cross section formed by the IV-IV' section line. However, for clarity, the oblique conductive structure 140 is still schematically shown in dotted lines in FIG. 3 Possible appearances projected on the aforementioned section.

Please refer to FIGS. 1C, 2C and FIGS. 3 to 5, the display device 100 includes a flexible substrate 150, a first wire 110, a second wire 120 and a plurality of diagonal conductive structures 140. The first wire 110 is located on the first surface 150 a of the flexible substrate 150. The first wire 110 extends from the display area 151 to at least the flexible area 153. The second wire 120 is located on the second surface 150 b of the flexible substrate 150. The second wire 120 is at least disposed in the flexible area 153. The plurality of oblique conductive structures 140 are at least disposed in the flexible area 153. The oblique conductive structure 140 penetrates the flexible substrate 150, and the plurality of oblique conductive structures 140 are electrically connected to the first wire 110 and the second wire 120.

In this embodiment, the projection 140e of the extension direction 140d of the oblique conductive structure 140 on the first surface 150a or the second surface 150b is substantially parallel to the extension direction 110d of the first wire 110 on the first surface 150a or the second surface. The projection 110e on 150b, and/or the projection 140e of the extension direction 140d of the diagonal conductive structure 140 on the first surface 150a or the second surface 150b is substantially parallel to the extension direction 120d of the second wire 120 on the first surface 150a or The projection 120e on the second surface 150b. That is, in a direction perpendicular to the first surface 150a or the second surface 150b (for example, the direction shown in FIG. 1C or FIG. 4), the oblique conductive structure 140 may overlap the first conductive line 110 and/or the first conductive line 110 and/or the second surface 150b. Two wire 120. In an application of the display device 100, an external force can be applied to cause the flexible substrate 150 to produce corresponding curling or bending in the flexible area 153. When the flexible substrate 150 is curled or flexed, corresponding stress (such as compressive stress) may be generated inside the flexible substrate 150 or the components on the flexible substrate 150 in the flexible area 153. Or tensile stress). In this way, under the same force, by making the extension direction 140d not perpendicular to the oblique conductive structure 140 of the first surface 150a or the second surface 150b, the oblique conductive structure 140 can be stressed (that is, per unit area). The force received) is reduced, and the possibility of damage or damage to the diagonal conductive structure 140 can be reduced. Therefore, the display device 100 can have good line transmission quality.

In this embodiment, the first wire 110 and the second wire 120 may be electrically connected to each other through a plurality of diagonal conductive structures 140. In this way, the quality of the electronic signal or power supply may be improved. For example, it may be possible to reduce the voltage drop (IR drop). For another example, if part of the first wire 110, the second wire 120 or the diagonal conductive structure 140 is damaged or damaged unexpectedly, other parallel circuits can also be used to transmit electronic signals or power. In this way, the display device 100 can have good line transmission quality.

In this embodiment, the line width 120w of the second wire 120 may be greater than the line width 110w of the first wire 110, but the present invention is not limited thereto.

In an embodiment, the first surface 150a of the flexible substrate 150 may have a first wire 110 and other elements (such as driving elements, light-emitting elements, etc.), and the second surface 150b of the flexible substrate 150 There may be a second wire 120. Therefore, the line width 120w of the second wire 120 can be made larger than the line width 110w of the first wire 110, and the opposite sides of the flexible substrate 150 (that is, the first surface 150a and the second surface 150b) can be exposed to The stresses are relatively consistent, which may reduce the possibility of the display device 100 curling and deforming without external force.

In this embodiment, the display device 100 may further include a third wire 130, but the invention is not limited to this.

In this embodiment, the line width 130w of the third wire 130 may be greater than the line width 110w of the first wire 110, but the present invention is not limited thereto.

In this embodiment, in a direction D1 perpendicular to the extending direction 110d of the first wire 110 or the extending direction 120d of the second wire 120, it is electrically connected to the oblique direction of a first wire 110 or a second wire 120 The conductive structure 140 basically does not completely overlap with other diagonal conductive structures 140 electrically connected to the adjacent first conductive line 110 or the foregoing second conductive line 120. In this way, in the process of forming the diagonal conductive structure 140, the process window may be improved, and the yield and quality of the display device 100 may be improved.

For example, the first wire 110 includes a first wire 111 (may be called: a second sub-wire), a first wire 112 (may be called: a first sub-wire), and a first wire 113 (may be called: : The third sub-wire), the first wire 111 and the first wire 113 are respectively located on opposite sides of the first wire 112 and adjacent to the first wire 112. The oblique conductive structure 141 (may be referred to as: the second sub-oblique conductive structure) is electrically connected to the first wire 111, and the oblique conductive structure 142 (may be referred to as: the first sub-oblique conductive structure) is electrically connected On the first wire 112, the diagonal conductive structure 143 (may be referred to as the third sub-diagonal conductive structure) is electrically connected to the first wire 113. In the direction D1 perpendicular to the extending direction 110d of the first wire 110, the oblique conductive structure 141 does not completely overlap the oblique conductive structure 142, and the oblique conductive structure 143 does not substantially overlap the oblique conductive structure 142. . In other words, the diagonal conductive structure 142 is basically not completely located on the connection line between the diagonal conductive structure 141 and the diagonal conductive structure 143.

For another example, the second wire 120 includes a second wire 121, a second wire 122, and a second wire 123. The second wire 121 and the second wire 123 are respectively located on opposite sides of the second wire 122 and adjacent to the second wire.线122。 Wire 122. The diagonal conductive structure 141 is electrically connected to the second wire 121, the diagonal conductive structure 142 is electrically connected to the second wire 122, and the diagonal conductive structure 143 is electrically connected to the second wire 123. In the direction D1 perpendicular to the extending direction 120d of the second wire 120, the diagonal conductive structure 141 does not completely overlap the diagonal conductive structure 142, and the diagonal conductive structure 143 does not completely overlap the diagonal conductive structure 142. .

In one embodiment, in a direction D1 perpendicular to the extending direction 110d of the first wire 110 or the extending direction 120d of the second wire 120, the oblique direction of a first wire 110 or a second wire 120 is electrically connected The conductive structure 140 may not substantially overlap with other oblique conductive structures 140 that are adjacent to and electrically connected to the aforementioned first wire 110 or the aforementioned second wire 120.

In an embodiment, the display device 100 may further include a circuit board (not shown) disposed on the second connection area 154 of the flexible substrate 150. The aforementioned circuit board may be, for example, a flexible printed circuit board (Flexible Printed Circuit; FPC), but the present invention is not limited thereto. For example, the aforementioned circuit board may include a circuit board called Chip On Film (COF).

6A to 6B are schematic partial top views of a part of a manufacturing method of a display device according to a second embodiment of the present invention. 7A to 7B are schematic partial cross-sectional views of a part of a manufacturing method of a display device according to a second embodiment of the present invention. For example, FIG. 7A may be a schematic cross-sectional view corresponding to the section line V-V' in FIG. 6A, and FIG. 7B may be a schematic cross-sectional view corresponding to the section VI-VI' in FIG. 6B. The manufacturing method of the display device 200 of the second embodiment is similar to the manufacturing method of the display device 100 of the first embodiment. Similar components are denoted by the same reference numerals and have similar functions, materials or formation methods, and descriptions are omitted.

6A and 7A, a plurality of oblique through holes 280 penetrating the flexible substrate 150 are formed. The oblique through hole 280 is located at least in the flexible area 153. For example, the laser device 92 can be used to form a slope from the second surface 150b of the flexible substrate 150 through the flexible substrate 150 from the second surface 150b to the first surface 150a by means of laser burning. To through hole 280.

In this embodiment, the oblique through hole 280 may not penetrate the first wire 110. That is to say, in terms of the overall structure, the oblique through hole 280 can be regarded as a blind hole of the first wire 110 whose bottom is part.

In this embodiment, the aperture 280a of the opening (may be referred to as the upper opening) of the oblique through hole 280 located on the first surface 150a may be smaller than the aperture of the opening (may be referred to as the lower opening) on the second surface 150b 280b.

Referring to FIGS. 6A to 6B and FIGS. 7A to 7B, after the oblique through hole 280 is formed, a second patterned conductive layer 129 may be formed on the second surface 150b of the flexible substrate 150. Part of the patterned lines in the second patterned conductive layer 129 may constitute the second wire 120. In addition, part of the conductive material used to form the second patterned conductive layer 129 can be more filled in the diagonal through hole 280 to form the diagonal conductive structure 240 at least penetrating the flexible substrate 150.

After at least the above-mentioned manufacturing method, the manufacturing of the display device 100 of this embodiment can be substantially completed.

FIG. 6B may be a schematic partial top view of a display device according to the second embodiment of the present invention. FIG. 7B may be a schematic partial cross-sectional view of a display device according to the second embodiment of the present invention. FIG. 8 is a schematic partial cross-sectional view of a display device 200 according to the second embodiment of the present invention. For example, the area corresponding to FIG. 6B may be similar to the area R1 in FIG. 5, and FIG. 8 may be a schematic cross-sectional view corresponding to the section line VII-VII' in FIG. 6B. In addition, the diagonal conductive structure 240 may not be exactly located on the cross section formed by the VII-VII' section line. However, for clarity, the diagonal conductive structure 240 is still schematically shown in dashed lines in FIG. 8 Possible appearances projected on the aforementioned section.

Referring to FIGS. 6B, 7B and 8, the display device 200 includes a flexible substrate 150, a first wire 110, a second wire 120 and a plurality of diagonal conductive structures 240. The oblique conductive structure 240 penetrates the flexible substrate 150, and the plurality of oblique conductive structures 240 are electrically connected to the first wire 110 and the second wire 120.

In this embodiment, the oblique conductive structure 240 may have top and bottom ends opposite to each other. The bottom end of the oblique conductive structure 240 may contact the second wire 120. The top end of the oblique conductive structure 240 may contact the first wire 110. The diameter width 240a of the top end of the oblique conductive structure 240 (the diameter width 240a may be referred to as: the top diameter width) may be smaller than the diameter width 240b of the bottom end of the oblique conductive structure 240 (the diameter width 240b may be referred to as: the bottom diameter width) .

In this embodiment, the included angle A5 between the extending direction 240d of the oblique conductive structure 240 and the first surface 150a is substantially between 30∘ to 60∘, and/or the extending direction 240d of the oblique conductive structure 240 is substantially equal to the second surface 150a. The included angle A6 between the surfaces 150b is basically between 30∘ to 60∘.

In an embodiment, the extending direction 240d of the oblique conductive structure 240 may be substantially a line from the midpoint C5 of the top end to the midpoint C6 of the bottom end (for example, connecting midpoint C5 and midpoint C6 in FIG. 7B). Dotted line).

In one embodiment, the angle between the extending direction 240d of the oblique conductive structure 240 and the first surface 150a or the second surface 150b (such as the included angle A5 or the included angle A6) may be substantially between 40∘ to 50∘, but The present invention is not limited to this.

9A and 9B are schematic partial cross-sectional views of a display device according to a third embodiment of the present invention. The display device 300 of the third embodiment is similar to the display device 100 of the first embodiment, and its similar components are denoted by the same reference numerals, and have similar functions, materials, formation or manufacturing methods, and descriptions are omitted. For example, the area corresponding to FIG. 6B may be similar to the area depicted in FIG. 2C.

9A and 9B, the display device 300 includes a flexible substrate 150, a first wire 110, a second wire 120, and a plurality of diagonal conductive structures 140.

The plurality of diagonal conductive structures 140 may include a plurality of first diagonal conductive structures 341 and a plurality of second diagonal conductive structures 342. The plurality of first oblique conductive structures 341 may be disposed in the flexible area 153, and the plurality of second oblique conductive structures 342 may be disposed in the first connection area 152 or the second connection area 154. The plurality of first oblique conductive structures 341 have a first pitch P1 between them, and the plurality of second oblique conductive structures 342 have a second pitch P2 between them, and the first pitch P1 is smaller than the second pitch P2.

FIG. 10 is a schematic partial cross-sectional view of a display device according to a fourth embodiment of the present invention. The display device 400 of the fourth embodiment is similar to the display device 100 of the first embodiment, and its similar components are denoted by the same reference numerals, and have similar functions, materials, formation or manufacturing methods, and descriptions are omitted. For example, the area corresponding to FIG. 10 may be similar to the area depicted in FIG. 2C.

Please refer to FIG. 10, the display device 400 includes a flexible substrate 150, a first wire 110, a second wire 120 and a plurality of diagonal conductive structures 140.

The plurality of diagonal conductive structures 140 may include a first diagonal conductive structure 441 and a second diagonal conductive structure 442. The first oblique conductive structure 441 may be disposed in the flexible area 153, and the second oblique conductive structure 442 may be disposed in the first connection area 152 or the second connection area 154. There is a first included angle A7 between the extending direction 441d of the first oblique conductive structure 441 and the first surface 150a or the second surface 150b. There is a second included angle A8 between the extending direction 442d of the second oblique conductive structure 442 and the first surface 150a or the second surface 150b, and the angle of the first included angle A7 is smaller than the angle of the second included angle A8.

In this embodiment, the number of first diagonal conductive structures 140 or the number of second diagonal conductive structures 140 is not limited.

In this embodiment, the angle of the first included angle A7 and/or the angle of the second included angle A8 is substantially between 30∘ to 60∘.

FIG. 11 is a schematic partial cross-sectional view of a display device according to a fifth embodiment of the present invention. The display device 500 of the fifth embodiment is similar to the display device 100 of the first embodiment, and its similar components are denoted by the same reference numerals, and have similar functions, materials, formation or manufacturing methods, and descriptions are omitted. For example, the area corresponding to FIG. 11 may be similar to the area depicted in FIG. 2C.

Please refer to FIG. 11, the display device 500 includes a flexible substrate 150, a first wire 110, a second wire 120 and a plurality of diagonal conductive structures 140.

The plurality of diagonal conductive structures 140 may include a first diagonal conductive structure 541 and a second diagonal conductive structure 542. The first oblique conductive structure 541 may be disposed in the flexible area 153, and the second oblique conductive structure 542 may be disposed in the first connection area 152 or the second connection area 154. On a cross-section 150c parallel to the first surface 150a or the second surface 150b, the first oblique conductive structure 541 has a first diameter width 541w, the second oblique conductive structure 542 has a second diameter width 542w, and a first diameter width 541w is larger than the second diameter 542w.

In this embodiment, the number of the first diagonal conductive structures 541 or the number of the second diagonal conductive structures 542 is not limited.

FIG. 12A is a schematic partial bottom view of a display device according to the sixth embodiment of the present invention. 12B is a schematic partial cross-sectional view of a display device according to the sixth embodiment of the present invention. The display device 600 of the sixth embodiment is similar to the display device 100 of the first embodiment, and similar components are denoted by the same reference numerals, and have similar functions, materials, formation or manufacturing methods, and descriptions are omitted. For example, the area corresponding to FIG. 12A may be similar to the area depicted in FIG. 2C. FIG. 12B may be a schematic cross-sectional view corresponding to the section line VIII-VIII' in FIG. 12A.

12A and 12B, the display device 600 includes a flexible substrate 150, a first wire 110, a second wire 120, and a plurality of diagonal conductive structures 140. The plurality of diagonal conductive structures 140 may include a first diagonal conductive structure 641 and a second diagonal conductive structure 642. The first oblique conductive structure 641 has a first extension direction 641d, the second oblique conductive structure 642 has a second extension direction 642d, and the projection direction 641e of the first extension direction 641d on the first surface 150a or the second surface 150b (projection The direction 641e may be referred to as: the first direction) is substantially different from the projection direction 642e of the second extension direction 642d on the first surface 150a or the second surface 150b (the projection direction 642e may be referred to as: the second direction).

In this embodiment, the projection direction 641e and the projection direction 642e may be opposite.

In this embodiment, the distance between the first oblique conductive structure 641 and the display area 151 is smaller than the distance between the second oblique conductive structure 642 and the display area 151, and the first extension direction 641d is on the first surface 150a or the first surface 150a. The projection direction 641e on the two surfaces 150b faces the display area 151, and the projection direction 642e of the second extension direction 642d on the first surface 150a or the second surface 150b is away from the display area 151. The aforementioned distance may refer to the physical distance between the corresponding diagonal conductive structure 140 (such as the first diagonal conductive structure 641 or the second diagonal conductive structure 642) and the display area 151, or the physical distance from the display area 151. The current path of the corresponding electronic signal.

In this embodiment, the first oblique conductive structure 641 and the second oblique conductive structure 642 may be located on opposite sides of a virtual plane 150d. The virtual surface 150 d may be perpendicular to the extension direction 110 d of the first wire 110 or the extension direction 120 d of the second wire 120, and the virtual surface 150 d may be located in the flexible region 153.

In this embodiment, the first extension direction 641d and the second extension direction 642d may be mirror-symmetrical on opposite sides of the virtual plane 150d.

In an embodiment not shown, the diagonal conductive structure 240 in the foregoing embodiment can be the same or similar to the first diagonal conductive structure 341, the first diagonal conductive structure 341, and the first diagonal conductive structure 341. , The first oblique conductive structure 341, the second oblique conductive structure 342, the second oblique conductive structure 342, the second oblique conductive structure 342, and/or the second oblique conductive structure 342 are configured.

FIG. 13 is a schematic partial cross-sectional view of a display device according to a seventh embodiment of the present invention. The display device 700 of the seventh embodiment is similar to the display device 100 of the first embodiment or the display device 100 of the second embodiment, and its similar components are denoted by the same reference numerals and have similar functions, materials, formation or manufacturing methods , And omit the description. For example, the area corresponding to FIG. 13 may be similar to the area depicted in FIG. 2C.

Please refer to FIG. 13, the display device 700 includes a flexible substrate 150, a first wire 110, a second wire 120, a plurality of diagonal conductive structures 140 and a plurality of diagonal conductive structures 240.

In this embodiment, the oblique conductive structure 140 and the oblique conductive structure 240 may be alternately arranged. For example, a plurality of diagonal conductive structures 140 and a plurality of diagonal conductive structures 240 electrically connected to the same first wire 110 or the same second wire 120 are arranged along the extending direction 110d of the first wire 110 or the second wire 110 The wires 120 may be arranged staggered in the extending direction 120d. In this way, the total number of diagonal conductive structures (including diagonal conductive structure 140 and diagonal conductive structure 240) can be increased. In addition, in the process of forming the oblique conductive structure 140 and/or the oblique conductive structure 240, the process margin may be improved, and the yield and quality of the display device 700 may be improved.

In this embodiment, between the adjacent diagonal conductive structure 140 and the diagonal conductive structure 240, the sidewalls adjacent to each other may be substantially parallel to each other. For example, the sidewall 140s of the diagonal conductive structure 140 and the sidewall 240s of the diagonal conductive structure 240 may be substantially parallel to each other.

The present invention does not exclude the combination between the above embodiments. For example, in one embodiment, the first oblique conductive structure 341 may have an oblique angle similar to that of the first oblique conductive structure 441, and the second oblique conductive structure 342 may have an oblique angle similar to that of the second oblique conductive structure. The angle of oblique to the conductive structure 442. For another example, in an embodiment, the first oblique conductive structure 341 may have a diameter similar to that of the first oblique conductive structure 541, and the second oblique conductive structure 342 may have a diameter similar to that of the second oblique conductive structure. The diameter of the conductive structure 542 is wide. For another example, the first oblique conductive structure 341 may have an oblique angle similar to that of the first oblique conductive structure 441 and may have a diameter width similar to that of the first oblique conductive structure 541, and the second oblique conductive structure The conductive structure 342 may have an oblique angle similar to that of the second oblique conductive structure 442 and may have a diameter similar to that of the second oblique conductive structure 542.

In summary, in the display device or the manufacturing method thereof of the present invention, the plurality of oblique conductive structures are arranged in the flexible area and penetrate the flexible substrate, and the plurality of oblique conductive structures are electrically connected to The first wire and the second wire are located on two opposite surfaces of the flexible substrate. In this way, the display device can have better quality.

100, 200, 300, 400, 500, 600, 700: display device 110, 111, 112, 113: the first wire 110w: line width 119: The first patterned conductive layer 120, 121, 122, 123: second wire 129: second patterned conductive layer 120w: line width 130: third wire 130w: line width 140, 141, 142, 143, 240: diagonal conductive structure 341, 441, 541, 641: the first diagonal conductive structure 342, 442, 542, 642: second diagonal conductive structure 140a, 140b, 240a, 240b: diameter width 140d, 240d, 441d, 442d, 641d, 642d: extension direction 641e, 642e: projection direction 140e: projection 140s, 240s: sidewall 541w: first diameter width 542w: second diameter width P1: first pitch P2: second pitch 150: Flexible substrate 150a: first surface 150b: second surface 150c: section 151: display area 152: The first connection zone 153: Flexible Zone 154: The second connection area 160: insulating layer 180, 280: diagonal through hole 180a, 180b: caliber 180d: extension direction 91, 92: Laser device A1, A2, A3, A4, A5, A6: included angle C1, C2, C3, C4, C5, C6: midpoint D1: direction

1A to 1C are schematic partial top views of a part of a manufacturing method of a display device according to a first embodiment of the present invention. 2A to 2C are schematic partial cross-sectional views of a part of a manufacturing method of a display device according to the first embodiment of the present invention. FIG. 3 is a schematic partial cross-sectional view of a display device according to the first embodiment of the present invention. FIG. 4 is a schematic partial bottom view of a display device according to the first embodiment of the present invention. FIG. 5 is a schematic top view of a display device according to the first embodiment of the present invention. 6A to 6B are schematic partial top views of a part of a manufacturing method of a display device according to a second embodiment of the present invention. 7A to 7B are schematic partial cross-sectional views of a part of a manufacturing method of a display device according to a second embodiment of the present invention. FIG. 8 is a schematic partial cross-sectional view of a display device according to a second embodiment of the present invention. 9A and 9B are schematic partial cross-sectional views of a display device according to a third embodiment of the present invention. FIG. 10 is a schematic partial cross-sectional view of a display device according to a fourth embodiment of the present invention. FIG. 11 is a schematic partial cross-sectional view of a display device according to a fifth embodiment of the present invention. FIG. 12A is a schematic partial cross-sectional view of a display device according to a sixth embodiment of the present invention. 12B is a schematic partial cross-sectional view of a display device according to the sixth embodiment of the present invention. FIG. 13 is a schematic partial cross-sectional view of a display device according to a seventh embodiment of the present invention.

100: display device

110: The first wire

120: second wire

129: second patterned conductive layer

130: third wire

140: diagonal conductive structure

140a, 140b: diameter width

140d: extension direction

150: Flexible substrate

150a: first surface

150b: second surface

160: insulating layer

A3, A4: included angle

C3, C4: midpoint

Claims (10)

A display device includes: A flexible substrate having a first surface and a second surface opposite to the first surface, and the flexible substrate includes a display area and a flexible area; A first wire located on the first surface of the flexible substrate and extending from the display area to the flexible area; A second wire located on the second surface of the flexible substrate and at least disposed in the flexible area; and A plurality of oblique conductive structures are disposed at least in the flexible area and at least penetrate the flexible substrate, and the plurality of oblique conductive structures are electrically connected to the first wire and the second wire. The display device according to claim 1, wherein the line width of the second wire is greater than the line width of the first wire. The display device according to claim 1, further comprising: The third wire is located on the first surface of the flexible substrate and covers the first wire, the plurality of oblique conductive structures further penetrate the first wire, and the second wire, the The materials of the plurality of diagonal conductive structures and the third wire are substantially the same. The display device according to claim 1, wherein the angle between the extending direction of the plurality of oblique conductive structures and the first surface or the second surface is between 30∘ and 60∘. The display device according to claim 1, wherein the flexible substrate further includes a connection area between the display area and the flexible area, and the first wire passes from the display area through the The connection area extends to the flexible area, the second wire is further disposed in the connection area, and the plurality of oblique conductive structures includes at least one first oblique conductive structure and at least one second oblique conductive structure , The plurality of first oblique conductive structures are disposed in the flexible area, the plurality of second oblique conductive structures are disposed in the connection area, and wherein: A first distance between the plurality of first oblique conductive structures, a second distance between the plurality of second oblique conductive structures, and the first distance is smaller than the second distance; There is a first angle between the extension direction of the first oblique conductive structure and the first surface or the second surface, and the extension direction of the second oblique conductive structure is the same as the first surface or the second surface. There is a second included angle between the second surfaces, and the first included angle is smaller than the second included angle; or The first oblique conductive structure has a first diameter width, the second oblique conductive structure has a second diameter width, and the first diameter width is greater than the second diameter width. The display device according to claim 1, wherein the plurality of oblique conductive structures includes a first oblique conductive structure and a second oblique conductive structure, and the gap between the first oblique conductive structure and the display area The connection distance is smaller than the connection distance between the second oblique conductive structure and the display area, and the projection of the extension direction of the first oblique conductive structure on the first surface or the second surface Has a first direction, the projection of the extension direction of the second oblique conductive structure on the first surface or the second surface has a second direction, and the first direction is substantially different from the second direction. The display device according to claim 1, wherein the plurality of diagonal conductive structures include adjacent first diagonal conductive structures and second diagonal conductive structures, and opposite sides of the first diagonal conductive structures have A first top diameter width and a first bottom diameter width, opposite sides of the second oblique conductive structure have a second top diameter width and a second bottom diameter width, the first top diameter width is greater than the first bottom diameter width The diameter is wide, and the second top diameter is smaller than the second bottom diameter. The display device according to claim 7, wherein two adjacent sidewalls between the first oblique conductive structure and the second oblique conductive structure are substantially parallel. The display device according to claim 1, wherein the first wire includes a first sub-wire, and a second sub-wire and a third sub-wire that are located on opposite sides of the first sub-wire and are adjacent to each other, and the multiple An oblique conductive structure includes a first sub-oblique conductive structure connected to the first sub-wire, a second sub-oblique conductive structure connected to the second sub-wire, and a first sub-wire connected to the third sub-wire. Three sub-oblique conductive structures, and the first sub-oblique conductive structure is not completely located on the connecting line of the second sub-oblique conductive structure and the third sub-oblique conductive structure. A method for manufacturing a display device includes: Provide a flexible substrate, which has a first surface and a second surface opposite to the first surface, and the flexible substrate includes a display area and a flexible area; Forming a first wire on the first surface of the flexible substrate, and the first wire extends from the display area to the flexible area; Forming a plurality of oblique through holes penetrating the flexible substrate, and the plurality of oblique through holes are located at least in the flexible area; and A conductive material is formed on the second surface and in the plurality of oblique through holes to form at least a second wire and a plurality of oblique conductive structures.

Images