KR102167733B1 - Stretchable substrate - Google Patents

Abstract

The present invention relates in detail to a stretchable substrate mounted on a stretchable material and having conductivity, comprising: a first flat plate pattern; A second flat pattern spaced apart from the first flat pattern by a predetermined distance; And a bridge pattern connecting a first connection point of the first flat pattern and a second connection point of the second flat pattern. Including, the first connection point is located on an adjacent surface adjacent to the second flat pattern of the surface of the first flat pattern, the second connection point is the first flat type of the surface of the second flat pattern It can be located on a non-adjacent surface that is not adjacent to the pattern.

Description

Stretchable Substrate {STRETCHABLE SUBSTRATE}

The present invention relates to a stretchable substrate, and more particularly, to a stretchable substrate mounted on a stretchable material and having conductivity.

In recent years, wearable electronic devices have been developed for using electronic devices having data input, output, operation, and communication functions in proximity or close contact with the body. BACKGROUND ART [0002] As wearable electronic devices, devices having an accessory-like appearance such as wrist watches, glasses, and earphones, and textile-integrated devices incorporating electronic functions into clothes are known.

Electronic devices require electrical wiring for power supply or signal transmission. In particular, in a textile-integrated wearable electronic device, elasticity is also required for electrical wiring in accordance with the stretchable clothing. In general, electric wiring made of a metal wire or a metal foil does not have practical elasticity in nature, and thus a method of arranging the metal wire or metal foil in a corrugated or repeated horseshoe shape to have a pseudo stretch function is used.

In the case of metal wires, wiring can be formed by stitching metal wires into clothes like threads, but the process is complicated and expensive, so it is not suitable for mass production.

When wiring is formed by etching a metal foil, a wiring pattern can be formed through a photo process using a photoresist. This method can be achieved by bonding a metal pattern to a stretchable resin sheet and forming a corrugated wiring in the same manner as a printed wiring board.

A conventional pattern used for a stretchable substrate having elasticity may be composed of an interconnection between a membrane and a membrane. In this case, the interconnection can complement structural elasticity by having a pattern in which a U-shaped or angular waveform is repeatedly formed. However, when the membrane and the interconnection pattern are stretched and contracted, there is a problem that they are vulnerable to stress due to the pressure intensively applied to the interconnection.

A stretchable substrate according to an embodiment of the present invention has an object to reduce stress applied to an interconnection for connecting membranes when stretching is applied.

The stretchable substrate according to an embodiment of the present invention improves the limit to resist external forces by reducing the stress applied to the interconnection for connecting the membranes when stretching is applied, and improves the durability of the stretchable substrate. There is another purpose to augment.

A stretchable substrate according to an embodiment of the present invention for solving the above problems includes: a first flat plate pattern; A second flat pattern spaced apart from the first flat pattern by a predetermined distance; And a bridge pattern connecting a first connection point of the first flat pattern and a second connection point of the second flat pattern. Including, the first connection point is located on an adjacent surface adjacent to the second flat pattern of the surface of the first flat pattern, the second connection point is the first flat type of the surface of the second flat pattern It can be located on a non-adjacent surface that is not adjacent to the pattern.

The first flat pattern and the second flat pattern may be formed in a circular or polygonal flat plate shape.

When the distance between the first flat pattern and the second flat pattern is increased, the first flat pattern and the second flat pattern are in a predetermined direction corresponding to the positions of the first connection point and the second connection point. Can be rotated.

The first flat pattern and the second flat pattern may rotate in the predetermined direction based on a silicon elastic body connected to the lower portions of each of the first and second flat patterns as an axis.

The first flat pattern, the second flat pattern, and the bridge pattern may be formed through a photo process using a photoresist.

The bridge pattern includes a first section extending from the first connection point to an intermediate point; A second section extending from the second connection point to the intermediate point; Including, the first section and the second section, the extension direction is changed at the intermediate point, the pattern of the same shape may be repeated from the first connection point to the second connection point.

The repeated pattern of the same shape may be one of a right angled waveform, a zigzag shape, a curved waveform, and a horseshoe waveform.

The length of the first section may be shorter than the length of the second section.

A traveling direction of the first section and a traveling direction of the second section may be perpendicular to each other.

A stretchable substrate according to another embodiment of the present invention for solving the above problems includes a plurality of first flat pattern; A plurality of second planar patterns spaced apart from the plurality of first planar patterns by a predetermined distance; And a plurality of bridge patterns connecting a first connection point of the first flat pattern and a second connection point of the second flat pattern. Including, the first connection point is located on an adjacent surface adjacent to the second flat pattern of the surface of the first flat pattern, the second connection point is the first flat type of the surface of the second flat pattern It can be located on a non-adjacent surface that is not adjacent to the pattern.

The plurality of first planar patterns and the plurality of second planar patterns may be intersected with each other in a grid shape.

The stretchable substrate according to an embodiment of the present invention has an effect of reducing stress applied to an interconnection for connecting membranes when stretching is applied.

In addition, the stretchable substrate according to an embodiment of the present invention improves the limit value that can resist external forces by reducing the stress applied to the interconnection for connecting the membranes when stretching is applied, and the stretchable substrate Durability can be increased.

The accompanying drawings, which are included as part of the detailed description to aid in understanding of the present invention, provide embodiments for the present invention, and describe the technical idea of the present invention together with the detailed description.
1 is a view for explaining a pattern of a stretchable substrate according to an embodiment of the present invention.
2 and 3 are views for explaining another embodiment in which a first connection point and a second connection point are modified in the embodiment of FIG. 1.
4A and 4B are diagrams for explaining that a pattern shape of a stretchable substrate is deformed as stretching and contracting is applied to the stretchable substrate in the embodiment of FIG. 1.
5 is a view for explaining that a pattern of a stretchable substrate is repeatedly formed.
6 is a view for explaining that a pattern shape of the stretchable substrate is deformed as stretching and contracting is applied to the stretchable substrate according to the embodiment of FIG. 5.
7 to 10 are diagrams for describing shapes that may be formed in a bridge pattern of a stretchable substrate.
11 is a view for explaining by exemplifying another shape that a flat pattern of a stretchable substrate according to an embodiment of the present invention may have and a shape of a bridge pattern according thereto.
12 is a view for explaining a stretchable substrate and a silicon elastic body according to an embodiment of the present invention.

The present invention may apply various transformations and may have various embodiments. Hereinafter, specific embodiments will be described in detail based on the accompanying drawings.

The following examples are provided to aid in a comprehensive understanding of the methods, devices, and/or systems described herein. However, this is only an example and the present invention is not limited thereto.

In describing the embodiments of the present invention, when it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention and may vary according to the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout this specification. The terms used in the detailed description are only for describing the embodiments of the present invention, and should not be limiting. Unless explicitly used otherwise, expressions in the singular form include the meaning of the plural form. In this description, expressions such as "comprising" or "feature" are intended to refer to certain features, numbers, steps, actions, elements, some or combination thereof, and one or more other than those described. It should not be construed to exclude the presence or possibility of other features, numbers, steps, actions, elements, any part or combination thereof.

In addition, terms such as first and second may be used to describe various components, but the components are not limited by the terms, and the terms are used to distinguish one component from other components. Is only used.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view for explaining a pattern of a stretchable substrate 10 according to an embodiment of the present invention. Referring to FIG. 1, the stretchable substrate 10 may include a first planar pattern 100, a second planar pattern 200, and a bridge pattern 300.

The stretchable substrate 10 may increase the length of the substrate in response to stretching and contraction applied from the outside. Each of the patterns 100, 200, and 300 of the stretchable substrate 10 may be formed through a photo process using a photo-resist.

Photoresist is a polymer compound having photosensitivity, adhesion, and corrosion resistance, and can be used in a photoetching process. The photoresist may be exposed to light by irradiating ultraviolet rays by closely contacting a photomask having a predetermined pattern formed thereon, or projecting the photomask image with an optical system using ultraviolet rays after drying by being drawn on the sample surface of the substrate.

The stretchable substrate 10 including the first flat pattern 100, the second flat pattern 200 and the bridge pattern 300 may be formed by the above method.

The first flat pattern 100, the second flat pattern 200 and the bridge pattern 300 may be made of the same material, and in more detail, used for an epoxy-based negative photoresist It can be composed of SU-8.

The first flat pattern 100 and the second flat pattern 200 may be flat patterns having a predetermined shape. For example, the first flat pattern 100 and the second flat pattern 200 may have a polygonal shape such as a triangle, a square, or a hexagon, or may have a circular shape. An exemplary embodiment of the present invention will be described by exemplifying that the first flat pattern 100 and the second flat pattern 200 have a square shape.

The first flat pattern 100 and the second flat pattern 200 may be spaced apart by a predetermined distance, and a space interposed between the first flat pattern 100 and the second flat pattern 200 is interposed. It can be defined as a region (M).

Referring to FIG. 1, it can be seen that a bridge pattern 300 for connecting the first flat pattern 100 and the second flat pattern 200 to each other is formed. The bridge pattern 300 may have a shape that starts at the first connection point 310 of the first flat pattern 100 and extends to the second connection point 320 of the second flat pattern 200. In the exemplary embodiment of the present invention, the bridge pattern 300 may be understood as an interconnection for maintaining electrical connections between flat plate patterns.

The bridge pattern 300 may have a shape in which a predetermined pattern is repeatedly formed in order to reduce stress due to a pressure applied in correspondence with the stretchable substrate 10. In FIG. 1, it will be described by exemplifying that the shape of the angular waveform is repeatedly formed at a right angle.

In an embodiment of the present invention, the first connection point 310 may be located on one surface of the first flat pattern 100. In more detail, the first connection point 310 may be located on an adjacent surface 110 adjacent to the second flat pattern 100 among sides surrounding the first flat pattern 100. In addition, the second connection point 320 may be located on one of the non-adjacent surfaces 220, 230, and 240 that are non-adjacent to the first flat pattern 100 among sides surrounding the second flat pattern 200.

In order to secure a space of the bridge pattern 300 for the plurality of first flat pattern 100 and the plurality of second flat pattern 200 to be grid-arranged and connected to each other, the second connection point 320 is It is preferable to be positioned on the non-adjacent surface 220 and the non-adjacent surface 240 of the non-adjacent surfaces 220, 230, and 240 of the flat pattern 200. However, depending on the design of the stretchable substrate 10, the second connection point 320 may be located on another non-adjacent surface 240.

In FIG. 1, the adjacent surface 110 of the first flat pattern 100 and the adjacent surface 210 of the second flat pattern 200 may be set based on a surface where the two flat pattern patterns face each other. When the shape of the flat pattern is not a quadrangle as shown in FIG. 1 but a polygonal shape, a surface corresponding to a line connecting the centers of the two flat pattern spaced apart may be set as an adjacent surface. In addition, when the flat pattern is circular, an adjacent surface may be set according to an arc divided according to a predetermined angle.

The bridge pattern 300 may be formed by extending from the first connection point 310 to the second connection point 320. Positions of the adjacent surface 110 of the first flat pattern 100 where the first connection point 310 is located and the non-adjacent surface 220 of the second flat pattern 200 where the second connection point 320 is located Correspondingly, the extension direction of the bridge pattern 300 may be changed in the middle. A point at which the extension direction of the bridge pattern 300 is changed may be defined as an intermediate point 330.

When the distance between the first flat pattern 100 and the second flat pattern 200 is increased, the first flat plate due to the positions of the first connection point 310 and the second connection point 320 to which the bridge pattern 300 connects. The mold pattern 100 and the second flat plate pattern 200 are rotated in a predetermined direction. As the first flat pattern 100 and the second flat pattern 200 are partially rotated, the stress applied to the bridge pattern 300 is reduced. A more detailed description of this will be described later.

The section from the first connection point 310 to the midpoint 330 of the bridge pattern 300 is defined as a first section A1, and the section from the midpoint 330 to the second connection point 320 is defined as a second section. It can be defined as a section (B1).

The sum of the length of the first section A1 and the length of the second section B1 may be constant. That is, if the length of the first section A1 becomes longer in correspondence with the location of the first connection point 310, the length of the second section B1 becomes shorter and the relative position of the second connection point 320 is also changed. . More specifically, it will be described with reference to FIGS. 2 and 3.

2 and 3 are views for explaining another embodiment in which a first connection point and a second connection point are modified in the embodiment of FIG. 1. In FIGS. 2 and 3, a description of a configuration or effect that overlaps with FIG. 1 will be omitted. The first flat pattern 100 and the second flat pattern 200 of FIGS. 2 and 3 may have the same size as that of FIG. 1, are disposed at the same position as that of FIG. 1, and The distance may also be the same as in FIG. 1.

2, it can be seen that the positions of the first connection point 311 and the second connection point 321 are different from that of FIG. 1. In more detail, the first connection point 311 is located on the adjacent surface 110 adjacent to the second flat pattern 200 in the first flat pattern 100, but is more than the first connection point 310 of FIG. It can be located on the left. Here, the left refers to a direction on the drawing for comparing and explaining FIG. 2 with FIG. 1. That is, in the embodiment of FIG. 2, the first connection point 311 is at the center of the first flat pattern 100 than the first connection point 310 of FIG. 1 on the adjacent surface 110 of the first flat pattern 100. It can be located close to.

In the embodiment of FIG. 2, the second connection point 321 is located on the non-adjacent surface 220 that is non-adjacent to the first flat pattern 100 in the second flat pattern 200. It may be located below the connection point (320). Here, the lower side means a direction on the drawing for comparing and explaining FIG. 2 with FIG. 1. That is, in the embodiment of FIG. 2, the second connection point 321 is of the second flat pattern 200 than the second connection point 320 of FIG. 1 on the non-adjacent surface 220 of the second flat pattern 200. It can be located close to the center.

Accordingly, in the embodiment of FIG. 2, the difference in length between the first section A2 and the second section B2 may be less than the difference in length between the first section A1 and the second section B1 of FIG. 1.

3, it can be seen that the positions of the first connection point 312 and the second connection point 322 are different from those of FIG. 2 or 1. In more detail, the first connection point 312 is located on the adjacent surface 110 adjacent to the second flat pattern 200 in the first flat pattern 100, but the first connection point 310 of FIG. 1 or It may be located to the left of the first connection point 311 of FIG. 2. Here, the left refers to a direction on the drawing for comparing and describing FIG. 3 with FIG. 2 or 1. That is, in the embodiment of FIG. 3, the first connection point 312 is more than the first connection point 310 of FIG. 1 or the first connection point 311 of FIG. 2 on the adjacent surface 110 of the first flat pattern 100. It may be located near the center of the first flat pattern 100 or at the center of the adjacent surface 110.

In addition, in the embodiment of FIG. 3, the second connection point 322 is located on the non-adjacent surface 220 that is non-adjacent to the first flat pattern 100 in the second flat pattern 200. It may be located below the connection point 321. Here, the lower side means a direction on the drawing for comparing and explaining FIG. 3 with FIG. 2. That is, in the embodiment of FIG. 3, the second connection point 322 is of the second flat pattern 200 than the second connection point 321 of FIG. 2 on the non-adjacent surface 220 of the second flat pattern 200. It can be located close to the center.

Accordingly, in the embodiment of FIG. 3, the difference in length between the first section A3 and the second section B3 may be less than the difference in length between the first section A2 and the second section B2 of FIG. 2.

As described above, as shown in FIGS. 1 to 3, or by setting the first connection point and the second connection point at different positions to form the bridge pattern 300, the position of the bridge pattern can be changed according to the pattern formation environment.

4A and 4B are diagrams for explaining that the pattern shape of the stretchable substrate 10 is deformed as stretch is applied to the stretchable substrate 10 in the embodiment of FIG. 1.

4A may have the same configuration as the embodiment of FIG. 1, and may illustrate a state before stretching and contracting is applied to the stretchable substrate 10. 4B is a view for illustrating that the stretchable substrate 10 of the embodiment of FIG. 4A is extended in the F direction.

When the distance between the center point D1 of the first flat pattern 100 and the center point D2 of the second flat pattern 200 is C1, the center point D1 and the center point D2 by external force F in FIG. 4B You can see that the distance between) has increased to C2. The bridge pattern 300 connected to the first connection point 310 and the second connection point 320 extends together as the distance between the center points of the flat pattern increases. In response to the tension applied to both ends of the bridge pattern 300, the bridge pattern 300 pulls the first flat pattern 100 and the second flat pattern 200 through the respective connection points 310 and 320. do. Accordingly, the first flat pattern 100 and the second flat pattern 200 rotate in the E direction. In this case, the degree of rotation of the first flat pattern 100 and the second flat pattern 200 varies depending on the distance between the flat patterns or the relative positions of the first connection point 310 and the second connection point 320. I can.

There is an effect of relatively reducing the stress applied to the bridge pattern 300 according to the rotation of the plate-shaped patterns. Through this, the durability of the stretchable substrate 10 for the bridge pattern 300 is increased.

5 is a view for explaining that the pattern of the stretchable substrate 11 is repeatedly formed.

Referring to FIG. 5, it is exemplified that the plate-shaped patterns illustrated in FIG. 1 are arranged in a grid shape and spaced apart a predetermined distance from each other. In FIG. 5, one first planar pattern 100 may be connected to four second planar patterns 200 located around each other through bridge patterns. Similarly, one second planar pattern 200 may be connected to four first planar patterns 100 located around each other through bridge patterns. In FIG. 5, the connection between the flat patterns may be made as illustrated in FIGS. 1 to 3.

6 is a view for explaining that the pattern shape of the stretchable substrate 11 is deformed as stretching is applied to the stretchable substrate 11 according to the embodiment of FIG. 5. Previously, as described in FIGS. 4A and 4B, the first flat pattern 100 and the second flat pattern 200 may rotate in a predetermined direction in response to the elongation of the substrate.

6 shows that when the stretchable substrate 11 to which the plurality of first flat pattern 100 and the plurality of second flat pattern 200 are connected is extended in the F direction, the distance between each flat pattern is increased. , It is a diagram for illustrating a state in which the flat patterns are rotated.

7 to 10 are diagrams for explaining by exemplifying shapes that the bridge pattern 300 of the stretchable substrate may have. The bridge pattern 300 may have a shape in which a predetermined pattern is repeated in order to distribute the stress applied in response to the elongation of the substrate to the entire bridge pattern 300 without focusing on a specific position.

7 illustrates an angled waveform, FIG. 8 is a zigzag type, FIG. 9 is a curved waveform, and FIG. 10 is a horseshoe waveform. The shape of the bridge pattern 300 may be formed by repeating one of the shapes illustrated in FIGS. 7 to 10. The present invention is not limited to those illustrated in FIGS. 7 to 10, and other patterns for distributing stress may be used. The size or thickness of the repeating pattern constituting the bridge pattern 300 may be set differently according to the size of the substrate, the distance between the flat patterns, or the arrangement method.

11 is a view for explaining by exemplifying another shape that a flat pattern of a stretchable substrate according to an embodiment of the present invention may have and a shape of a bridge pattern according thereto. Referring to FIG. 11, the planar patterns are arranged crosswise with each other, but not the tiled grid type as in FIG. 5, but the planar patterns constituting one row and the planar patterns constituting the other row are made obliquely. Able to know.

12 is a view for explaining the stretchable substrate 11 and the silicon elastic body 20 according to an embodiment of the present invention.

Referring to FIG. 12, it can be seen that the silicon elastic body 20 is connected to the lower portion of the stretchable substrate 11 as shown in FIG. 6. The silicon elastic body 20 may be composed of a substrate 21 and a connection part 22. The substrate 21 may be integrally coupled to a stretchable material such as clothing, and the connection portion 22 is configured in a column shape for connecting the substrate 21 and the stretchable substrate 11 to the stretchable substrate ( A plurality of plates may be connected to each of 11). The silicone elastomer 20 may be made of a silicone material having elasticity, such as polydimethylsiloxane (PDMS).

The connection part 22 of the silicon elastic body 20 may be connected to the center of the flat pattern, through which the flat pattern of the stretchable substrate 11 is rotated around the connection part 22 in response to the extension of the substrate. I can.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments described in the present invention are not intended to limit the technical idea of the present invention, but to explain, and are not limited to these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: first flat pattern 110: adjacent surface
200: second flat pattern 210: adjacent surface
220, 230, 240: non-adjacent
300: bridge pattern 310: first connection point
320: second connection point 330: midpoint

Claims (11)

A first flat pattern;
A second flat pattern spaced apart from the first flat pattern by a predetermined distance;
A bridge pattern connecting a first connection point of the first flat pattern and a second connection point of the second flat pattern;
A substrate to be combined with an elastic material;
A first plurality of elastic bodies connecting the substrate and the first flat pattern; And
It includes a second plurality of elastic bodies connecting the substrate and the second flat pattern,
The first connection point is located on an adjacent surface adjacent to the second flat pattern among the surface of the first flat pattern, and the second connection point is non-adjacent to the first flat pattern among the surfaces of the second flat pattern. It is located on the non-adjacent surface,
A stretchable, characterized in that when the distance between the first flat pattern and the second flat pattern is increased, the first flat pattern and the second flat pattern rotate in the same direction about the elastic body. Board; The method of claim 1, wherein the first flat pattern and the second flat pattern are
Stretchable substrate, characterized in that formed in the shape of a circular or polygonal flat plate. delete The method of claim 1,
The elastic body is a stretchable substrate, characterized in that made of a silicon material. The method of claim 1, wherein the first flat pattern, the second flat pattern, and the bridge pattern are
A stretchable substrate, characterized in that the pattern is formed through a photo process using a photoresist. The method of claim 1, wherein the bridge pattern is
A first section extending from the first connection point to an intermediate point;
A second section extending from the second connection point to the intermediate point; Including,
The first section and the second section are extended in directions at the intermediate point,
A stretchable substrate, characterized in that the pattern of the same shape is repeated from the first connection point to the second connection point. The method of claim 6,
The repeating pattern of the same shape is a stretchable substrate, characterized in that one of a right angle angular waveform, a zigzag shape, a curved waveform and a horseshoe waveform. The method of claim 6,
The stretchable substrate, wherein the length of the first section is shorter than the length of the second section. The method of claim 6, wherein a traveling direction of the first section and a traveling direction of the second section are
Stretchable substrate, characterized in that perpendicular to each other. A plurality of first flat plate patterns;
A plurality of second planar patterns spaced apart from the plurality of first planar patterns by a predetermined distance;
A plurality of bridge patterns connecting first connection points of the plurality of first flat patterns and second connection points of the plurality of second flat patterns;
A substrate to be combined with an elastic material;
A first plurality of elastic bodies connecting the substrate and each of the plurality of first plate-shaped patterns; And
It includes a second plurality of elastic bodies connecting each of the substrate and the plurality of second flat pattern,
The first connection point includes a connection point located on an adjacent surface to one of the plurality of second flat pattern adjacent one of the plurality of first flat pattern patterns, and the second connection point is the second flat plate type A connection point located on a non-adjacent surface non-adjacent to one of the plurality of adjacent first flat pattern patterns among one surface of the pattern,
When the distance between the plurality of first flat pattern and the plurality of second flat pattern is increased, the plurality of first flat pattern and the plurality of second flat pattern rotate in the same direction around the elastic body Stretchable substrate, characterized in that. The method of claim 10, wherein the plurality of first flat pattern and the plurality of second flat pattern are
Stretchable substrate, characterized in that intersecting with each other in a grid pattern.

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