Display substrate, manufacturing method thereof and display device

Patent metadata

Field	Value
Publication number	US-12446318-B2
Application number	US-202318681577-A
Country	US
Kind code	B2
Filing date	Feb 20, 2023
Priority date	Mar 7, 2022
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A display substrate, a manufacturing method thereof and a display device are provided. The display substrate includes: a base substrate; a first signal transmission line and including first and second transmission sub-lines side by side in a same layer and electrically connected together; a first insulating layer on side of the first signal transmission line away from the base substrate; a second signal transmission line on side of the first insulating layer away from the base substrate and connected to the first transmission sub-line through a first via; a second insulating layer on a side of the second signal transmission line away from the base substrate; and a first connection member on a side of the second insulating layer away from the base substrate, connected to the second signal transmission line through a second via and to the second transmission sub-line through a third via.

First claim

What is claimed is:

1. A display substrate, comprising:
a base substrate;
a first signal transmission line on the base substrate and comprising a first transmission sub-line and a second transmission sub-line side by side in a same layer and electrically connected to each other;
a first insulating layer on a side of the first signal transmission line away from the base substrate;
a second signal transmission line on a side of the first insulating layer away from the base substrate and being in direct contact with the first transmission sub-line through a first via extending through the first insulating layer;
a second insulating layer on a side of the second signal transmission line away from the base substrate; and
a first connection member on a side of the second insulating layer away from the base substrate, connected to the second signal transmission line through a second via extending through the second insulating layer and connected to the second transmission sub-line through a third via extending through the first insulating layer and the second insulating layer.

2. The display substrate of claim 1 , wherein an orthographic projection of the second via on the base substrate is within an orthographic projection of the first via on the base substrate.

3. The display substrate of claim 1 , wherein an orthographic projection of the first via on the base substrate is within an orthographic projection of the second signal transmission line on the base substrate.

4. The display substrate of claim 3 , wherein the second signal transmission line comprises: a conductive portion and a transmission portion connected to the conductive portion; the conductive portion extends along a length direction of the first transmission sub-line, and an extending direction of the transmission portion intersects with an extending direction of the conductive portion; the orthographic projection of the first via on the base substrate is within an orthographic projection of the conductive portion on the base substrate; and
a size of the first via in a width direction of the conductive portion is 0.4 to 0.6 times of a width of the conductive portion, and a size of the second via in the width direction of the conductive portion is 0.2 to 0.5 times of the width of the conductive portion.

5. The display substrate of claim 3 , wherein the first connection member comprises: a first connection portion, a second connection portion, and a first climbing portion connected between the first connection portion and the second connection portion, the first connection portion is opposite to the second signal transmission line, an orthographic projection of the second connection portion on the base substrate is opposite to a spacing region between the first transmission sub-line and the second transmission sub-line, the first connection portion comprises: a first lap portion and a second climbing portion; the second climbing portion is inside the second via; the first lap portion is outside the second via and connects the first climbing portion with the second climbing portion; and
a slope angle of the first climbing portion is between 35° and 64°; a slope angle of the second climbing portion is between 35° and 62°.

6. The display substrate of claim 3 , wherein a depth of the first via is between 1500 Å and 4000 Å, a depth of the second via is between 3000 Å and 8000 Å, and a depth of the third via is between 3000 Å and 8000 Å.

7. The display substrate of claim 1 , wherein the second signal transmission line comprises: a conductive portion and a transmission portion connected to the conductive portion; the conductive portion extends along a length direction of the first transmission sub-line, and an extending direction of the transmission portion intersects with an extending direction of the conductive portion; and
an orthographic projection of the first via on the base substrate is a first projection, and an orthographic projection of the conductive portion on the base substrate is a second projection; and a part of the first projection exceeds the second projection and is on a side of the second projection close to the second transmission sub-line.

8. The display substrate of claim 7 , wherein the first connection member comprises a first connection portion, a second connection portion, and a first climbing portion connected between the first connection portion and the second connection portion, the first connection portion is opposite to the second signal transmission line, an orthographic projection of the second connection portion on the base substrate is opposite to a spacing region between the first transmission sub-line and the second transmission sub-line, the first connection portion comprises: a first lap portion and a second climbing portion; the second climbing portion is inside the second via; the first lap portion is outside the second via and connects the first climbing portion with the second climbing portion; and
a slope angle of the first climbing portion is between 20° and 45°; a slope angle of the second climbing portion is between 20° and 42°.

9. The display substrate of claim 7 , wherein a depth of the first via is between 1500 Å and 4000 Å, a depth of the second via is between 1500 Å and 4000 Å, and a depth of the third via is between 3000 Å and 8000 Å.

10. The display substrate of claim 7 , wherein a size of the first via in a width direction of the conductive portion is 0.4 to 0.6 times of a width of the conductive portion, and a size of the second via in the width direction of the conductive portion is 0.7 to 1.1 times of the width of the conductive portion.

11. The display substrate of claim 1 , wherein a cross-sectional area of the first via and a cross-sectional area of the second via each gradually decrease in a direction approaching the base substrate; and
a slope angle of a wall of the first via is smaller than that of a wall of the second via.

12. The display substrate of claim 1 , wherein the second insulating layer has a thickness between 1000 Å and 4000 Å.

13. The display substrate of claim 1 , wherein the display substrate comprises a plurality of first connection members and a plurality of second signal transmission lines; the first signal transmission line is connected to the plurality of first connection members; each first connection member is connected to one second signal transmission line through a plurality of second vias and is connected to the second transmission sub-line through a plurality of third vias; the plurality of third vias corresponding to a same first connection member are arranged along an extending direction of the first signal transmission line, and the plurality of second vias corresponding to a same first connection member are arranged along the extending direction of the first signal transmission line.

14. The display substrate of claim 13 , wherein an orthographic projection of the plurality of second vias corresponding to a same first connection member on the base substrate is within an orthographic projection of a corresponding first via on the base substrate.

15. The display substrate of claim 1 , wherein the display substrate comprises a display region and a non-display region, the display region comprises a plurality of sub-pixels, each of which is provided with a thin film transistor therein; and
the first signal transmission line, the second signal transmission line and the first connection member are all in the non-display region, the first signal transmission line and a gate electrode of the thin film transistor are in a same layer, and the second signal transmission line and a sou

Assignees

• Beijing Boe Display Tech Co
• Boe Technology Group Co Ltd

Inventors

• Wang Xiao
• Sang qi
• Ma Yu
• Yan Yan
• Chen Weitao

Classifications

• H10D84/01

  Manufacture or treatment · CPC title

• H10D86/441 Primary

  Interconnections, e.g. scanning lines · CPC title

• G09G2370/00

  Aspects of data communication · CPC title

• G09G2310/0286

  Details of a shift registers arranged for use in a driving circuit · CPC title

• G09G3/20 Primary

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title