Flexible electronic device

Patent metadata

Field	Value
Publication number	US-9860976-B1
Application number	US-201615394827-A
Country	US
Kind code	B1
Filing date	Dec 30, 2016
Priority date	Nov 28, 2016
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

According to an embodiment of the present disclosure, a flexible electronic device may include a unit structure including a substrate unit and a wiring structure. The substrate unit has slits to divide connecting portions between respective ends of two slits and wiring regions arranged outwardly from at least one unit center sequentially. The wiring structure is disposed on the substrate unit and includes wirings distributed in the wiring regions. Each wiring includes circumferential portions and radial portions connected between the circumferential portions. The radial portion connected to a first end of each circumferential portion extends toward the unit center from the first end. Each circumferential portion includes a first section and a second section. The first section is closer to the first end and has greater anti-stretching ability than the second section.

First claim

What is claimed is:

1. A flexible electronic device, comprising at least one unit structure, the at least one unit structure comprising:
a substrate unit, having a plurality of slits to divide a plurality of connecting portions and a plurality of wiring regions, each of the connecting portions being located between an end of one of the slits and an end of another of the slits, the wiring regions being arranged outwardly from at least one unit center in sequence, and two adjacent wiring regions being spaced from each other by a portion of the connecting portions and a portion of the slits; and
a wiring structure, disposed on the substrate unit, the wiring structure comprising a plurality of wirings, each of the wirings being distributed in the wiring regions, wherein each the wiring comprises a plurality of circumferential portions located on different wiring regions and a plurality of radial portions connected between the circumferential portions, a first end of each of the circumferential portions is connected to one of the radial portions, and the one of the radial portions extends toward the unit center from the first end, each of the circumferential portions comprises a first section and a second section, and the first section is closer to the first end and has greater anti-stretching ability than the second section.

2. The flexible electronic device according to claim 1 , wherein a cross-sectional area of the first section and a cross-sectional area of the second section are measured parallel to a line width direction of the circumferential portion, and the cross-sectional area of the first section is larger than the cross-sectional area of the second section.

3. The flexible electronic device according to claim 1 , wherein the substrate unit has a recess, and at least a portion of volume of the first section is located in the recess.

4. The flexible electronic device according to claim 1 , wherein the first section has a bent shape or a wavy shape.

5. The flexible electronic device according to claim 1 , wherein the first section comprises a plurality of sub-segments and a plurality of connecting segments, and the sub-segments are connected to each other via the connecting segments.

6. The flexible electronic device according to claim 5 , wherein the sub-segments and the connecting segments are connected to form a grid, or at least one of the sub-segments and the connecting segments has a bent shape or a wavy shape.

7. The flexible electronic device according to claim 1 , wherein a length of the first section measured along an extension direction of one of the circumferential portions accounts for 10% to 50% of a length of the one of the circumferential portions.

8. The flexible electronic device according to claim 1 , wherein a second end of each of the circumferential portions is connected to another radial portion, and the another radial portion extends from the second end in a direction away from the unit center.

9. The flexible electronic device according to claim 1 , wherein one of the slits exists between two adjacent connecting portions among the connecting portions arranged outwardly from the unit center along a reference line in sequence.

10. The flexible electronic device according to claim 1 , wherein one of the wiring regions is provided with a layout area thereon, the circumferential portion is disposed within the layout area, and a first spacing distance between the layout area and the slit at an inner side is smaller than a second spacing distance between the layout area and the slit at an outer side.

11. The flexible electronic device according to claim 1 , wherein one circumferential portion is disposed along a center line of one corresponding wiring regions.

12. The flexible electronic device according to claim 1 , wherein a first spacing distance between one circumferential portion and one corresponding slit at an inner side is smaller than a second spacing distance between the circumferential portion and the slit at an outer side.

13. The flexible electronic device according to claim 1 , further comprising an electronic component, disposed on the substrate unit and electrically connected to at least one of the wirings of the wiring structure.

14. The flexible electronic device according to claim 1 , wherein two adjacent of the wirings are connected to each other in one of the wiring regions.

15. The flexible electronic device according to claim 1 , wherein two adjacent of the wirings are symmetrical to each other.

16. The flexible electronic device according to claim 1 , wherein the flexible electronic device comprises a plurality of unit structures, and a plurality of substrate units of the plurality of unit structures are composed of an integrated flexible substrate.

17. The flexible electronic device according to claim 16 , wherein the flexible substrate has a plurality of peripheral slits located between adjacent substrate units.

18. The flexible electronic device according to claim 17 , wherein one wiring of one of the unit structures extends toward another unit structure and winds around one of the peripheral slits.

19. The flexible electronic device according to claim 16 , wherein a portion of wirings of different unit structures are connected to each other.

20. The flexible electronic device according to claim 1 , wherein the wiring structure further comprises at least an inner wiring, the inner wiring comprises at least an inner wiring radial portion and at least an inner wiring circumferential portion connected to the inner wiring radial portion, the inner wiring circumferential portion is located between one circumferential portion of one of the wirings and one of the slits, and the inner wiring radial portion and one radial portion of one of the wirings are located on a same connecting portion.

Assignees

• Ind Tech Res Inst

Inventors

• Wang Sheng-Po
• Chang Chih-Chia
• Wang Chao-Jen
• Chuang Jui-Chang

Classifications

• H05K2201/09063

  Holes or slots in insulating substrate not used for electrical connections · CPC title

• H05K2201/10151

  Sensor · CPC title

• H05K1/18

  structurally associated with non-printed electric components (H05K1/16 takes precedence) · CPC title

• H05K2201/09227

  Layout details of a plurality of traces, e.g. escape layout for Ball Grid Array [BGA] mounting · CPC title

• H05K1/028 Primary

  Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence) · CPC title