Electronic Device and Manufacturing Method thereof

Patent metadata

Field	Value
Publication number	US-2022013696-A1
Application number	US-202117369282-A
Country	US
Kind code	A1
Filing date	Jul 7, 2021
Priority date	Jul 7, 2020
Publication date	Jan 13, 2022
Grant date	—

Abstract

The present disclosure discloses an electronic device, including backplane circuits, a plurality of conductive adhesive elements arranged on the backplane circuits at intervals, and a plurality of electronic components arranged on the plurality of conductive adhesive elements respectively. The backplane circuits are respectively electrically connected with the plurality of electronic components through the plurality of conductive adhesive elements. The present disclosure further discloses a manufacturing method used for manufacturing the above electronic device.

First claim

1 . An electronic device, comprising:
a plurality of backplane circuits; a plurality of conductive adhesive elements arranged on the backplane circuits at intervals, respectively; and a plurality of electronic components arranged on the plurality of conductive adhesive elements respectively, wherein the backplane circuits are respectively electrically connected with the plurality of electronic components through the plurality of conductive adhesive elements.

2 . The electronic device according to claim 1 , wherein the backplane circuits are flexible; and the electronic components are rigid.

3 . The electronic device according to claim 1 , further comprising an electrical connector arranged on each of the backplane circuits or the electronic components, wherein the conductive adhesive elements are anisotropic conductive materials; and the conductive adhesive elements are pressed by the electrical connector to realize vertical conduction and horizontal insulation between the backplane circuits and the electronic components.

4 . The electronic device according to claim 3 , wherein the electrical connector comprises a first terminal and a second terminal arranged on each electronic component; and the first terminal and the second terminal protrude out of the electronic component and face a corresponding conductive adhesive element.

5 . The electronic device according to claim 3 , wherein the electrical connector comprises a third terminal and a fourth terminal arranged on each of the backplane circuits; and the third terminal and the fourth terminal protrude out of the backplane circuit and face a corresponding conductive adhesive element.

6 . The electronic device according to claim 3 , wherein the electrical connector comprises a first terminal and a second terminal arranged on each of the electronic components, and a third terminal and a fourth terminal arranged on each of the backplane circuits;
the first terminal and the second terminal protrude out of the electronic component and face a corresponding conductive adhesive element; the third terminal and the fourth terminal protrude out of the backplane circuit and face a corresponding conductive adhesive element; and the first terminal and the third terminal are arranged opposite to each other and press a corresponding conductive adhesive element together so as to realize electrical connection between the backplane circuit and the electronic component; and the second terminal and the fourth terminal are arranged opposite to each other and press a corresponding conductive adhesive element together so as to realize electrical connection between the backplane circuit and the electronic component.

7 . The electronic device according to claim 2 , further comprising a flexible substrate arranged on one side of the backplane circuits away from the conductive adhesive elements.

8 . The electronic device according to claim 7 , wherein
the flexible substrate comprises a plurality of island substrates arranged at intervals and a plurality of connecting substrates connecting two adjacent island substrates; the backplane circuits comprise a plurality of island circuits arranged at intervals and a plurality of connecting wires electrically connecting two adjacent island circuits; the island substrates, the island circuits, the conductive adhesive elements and the electronic components are stacked; and the plurality of connecting wires are respectively arranged on the plurality of connecting substrates.

9 . The electronic device according to claim 4 , wherein each of the electronic components comprise one or a plurality of Micro-LEDs; the first terminal and the second terminal are respectively a cathode and an anode of the Micro-LED; the backplane circuits are TFT circuits; and the TFT circuits are electrically connected with the Micro-LEDs and drive the Micro-LEDs through the third terminals and the fourth terminals.

10 . The electronic device according to claim 7 , further comprising an upper elastic packaging layer enclosing the electronic components or a lower elastic packaging layer arranged on a lower side of the flexible substrate.

11 . A manufacturing method of an electronic device, comprising:
forming a plurality of backplane circuits on a flexible substrate, wherein the backplane circuits have a plurality of connecting ends formed thereon respectively; forming conductive adhesive elements arranged at intervals on the backplane circuits respectively, wherein the conductive adhesive elements are anisotropic conductive materials; and arranging electronic components on the conductive adhesive elements respectively, wherein the electronic components have a plurality of conductive ends formed thereon respectively; the conductive ends and the connecting ends are arranged opposite to each other and press the conductive adhesive elements together so as to realize electrical connection between the backplane circuits and the electronic components.

12 . The method according to claim 11 , wherein the forming conductive adhesive elements arranged at intervals on the backplane circuits respectively, comprises:
screen-printing the conductive adhesive elements on the backplane circuits, respectively.

13 . The method according to claim 11 , wherein the forming conductive adhesive elements arranged at intervals on the backplane circuits respectively, comprises:
forming a continuous conductive adhesive layer on the backplane circuits; performing UV curing on areas that cover the connecting ends by a mask; and removing parts that are not subjected to UV curing in the continuous conductive adhesive layer to form the conductive adhesive elements.

14 . The method according to claim 11 , wherein the forming backplane circuits on a flexible substrate comprises:
forming patterned backplane circuits on the flexible substrate, wherein the patterned backplane circuits comprise a plurality of island circuits arranged at intervals and a plurality of connecting wires electrically connecting two adjacent island circuits; and forming the connecting ends on the backplane circuits respectively.

15 . The method according to claim 14 , further comprising:
patterning the flexible substrate, wherein the patterned flexible substrate comprises a plurality of island substrates arranged at intervals and a plurality of connecting substrates connecting two adjacent island areas; the island substrates, the island circuits, the conductive adhesive elements and the electronic components are stacked; and the plurality of connecting wires are respectively arranged on the plurality of connecting substrates.

16 . The method according to claim 11 , further comprising forming an upper elastic packaging layer on the electronic components.

17 . The method according to claim 11 , further comprising forming a lower elastic packaging layer on a lower side of the flexible substrate.

Assignees

• Shenzhen Royole Technologies Co Ltd

Inventors

• Kang Jiahao
• Yuan Ze
• Luo Haojun
• Hu Wenbing
• Wang Shaowen

Classifications

• H10W90/00

  Package configurations · CPC title

• H10W72/07332

  Compression bonding, e.g. thermocompression bonding · CPC title

• H10W70/22

  having an heterogeneous or anisotropic structure · CPC title

• H10H20/0364

  of interconnections · CPC title

• H10H29/142 Primary

  Two-dimensional arrangements, e.g. asymmetric LED layout · CPC title