Display substrate and method of manufacturing the same

• US 9,645,661 B2
• Filed: 10/29/2014
• Issued: 05/09/2017
• Est. Priority Date: 03/10/2014
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Jin-Yool, Hwang, Seong-Mo, Hoang, Euk-Chae, Kim, Dae-Il, Kim, Seung-Rae, Kim, Hyoung-Joon, Lee, Se-Ryun
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): Khoo, Stacy
• Application Number:
  US14/527,486
• Publication Number:
  US 20150253915A1
• Time in Patent Office: 923 Days
• Field of Search: 345173-179, 345204-212, 178 1801- 1809, 438 3
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/046 by electromagnetic means
• CPC Class Codes: H01L 27/1214 comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 27/1259 Multistep manufacturing methods
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

A display substrate includes a substrate, a plurality of first sensing loops and second sensing loops, an insulating layer covering the first and second sensing loops, a plurality of bridges disposed on the insulating layer, a gate line disposed on the insulating layer, and a transistor connected to the gate line, the transistor being disposed on the insulating layer. The first sensing loops are arranged on the substrate in a first direction at a predetermined interval. The second sensing loops are arranged on the substrate in a second direction different from the first direction at a predetermined interval. The second sensing loops are electrically separated from the first sensing loops. Each of the second sensing loops includes passing regions at which the first sensing loops pass through. One side of each of the first sensing loops and one side of each of the second sensing loops are open.

Claims

1. A display substrate comprising:

a substrate;

a plurality of first sensing loops arranged on the substrate in a first direction at a predetermined interval, wherein one side of each of the first sensing loops is open;

a plurality of second sensing loops arranged on the substrate in a second direction different from the first direction at a predetermined interval, wherein the second sensing loops are electrically separated from the first sensing loops, each of the second sensing loops including passing regions at which the first sensing loops pass through, and one side of each of the second sensing loops is open;

an insulating layer covering the first sensing loops and the second sensing loops;

a plurality of bridges disposed on the insulating layer, the bridges intersecting with the first sensing loops, the bridges penetrating the insulating layer and formed in contact with the second sensing loops;

a gate line disposed on the insulating layer; and

a transistor connected to the gate line, the transistor being disposed on the insulating layer,

wherein the first sensing loops include first transmitting loops and first receiving loops,

wherein the second sensing loops include second transmitting loops and second receiving loops, and

wherein the first transmitting loops and the second transmitting loops are disposed on a first layer, and the first receiving loops and the second receiving loops are disposed on a second layer that is different from the first layer.

2. The display substrate of claim 1, wherein the bridges are disposed at the passing regions.

3. The display substrate of claim 2, wherein the gate line and the bridges are disposed on another same layer.

4. The display substrate of claim 3, wherein the bridges and the gate line include a same conductive material.

5. The display substrate of claim 1, wherein the first transmitting loops generate a transmitting electromagnetic wave based on a transmitting current, and the first receiving loops generate a receiving current based on electromagnetic wave generated from an external electromagnetic inducing object, and

wherein the second transmitting loops generate the transmitting electromagnetic wave, and the second receiving loops receive electromagnetic wave generated from the external electromagnetic inducing object.

6. The display substrate of claim 1, wherein the insulating layer includes a first insulating layer covering the first transmitting loops and the second transmitting loops, and a second insulating layer covering the first receiving loops and the second receiving loops, and

wherein the bridges include first bridges electrically connecting portions of each of the second transmitting loops to each other at the passing regions, and second bridges electrically connecting portions of each of the second receiving loops to each other at the passing regions.

7. The display substrate of claim 6, wherein the gate line and the first bridges are disposed on a same third layer, and

wherein the gate line and the first bridges include a same conductive material.

8. A method of manufacturing a display substrate, comprising:

forming a first conductive layer on a substrate;

patterning the first conductive layer to form a plurality of first sensing loops and a plurality of second sensing loops, the first sensing loops comprising first transmitting loop and first receiving loops and being arranged on the substrate in a first direction at a predetermined interval, the second sensing loops comprising second transmitting loop and second receiving loops and being arranged on the substrate in a second direction different from the first direction at a predetermined interval, the second sensing loops being electrically separated from the first sensing loops, each of the second sensing loops including passing regions at which the first sensing loops pass through, one side of each of the first sensing loops and one side of each of the second sensing loops are open, the first transmitting loops and the second transmitting loops being disposed on a first layer, and the first receiving loops and the second receiving loops being disposed on a second layer that is different from the first layer;

forming an insulating layer to cover the first sensing loops and the second sensing loops;

etching the insulating layer to form a plurality of holes exposing portions of each of the second sensing loops;

forming a plurality of bridges in contact with the portions of each of the second sensing loops by filling the holes;

forming a gate line on the insulating layer; and

forming a transistor electrically connected to the gate line.

9. The method of claim 8, wherein the bridges intersect with the first sensing loops at the passing regions.

10. The method of claim 8, wherein the bridges and the gate line are concurrently formed using a second conductive layer.

11. A display substrate comprising:

a substrate;

a plurality of first sensing loops arranged on the substrate in a first direction at a predetermined interval, wherein one side of each of the first sensing loops is open;

a plurality of second sensing loops arranged on the substrate in a second direction different from the first direction at a predetermined interval, the second sensing loops being electrically separated from the first sensing loops, each of the second sensing loops including passing regions at which the first sensing loops pass through, and one side of each of the second sensing loops is open;

a gate line disposed on a same layer as the first sensing loops and the second sensing loops;

an insulating layer covering the first sensing loops, the second sensing loops, and the gate line;

a plurality of bridges disposed on the insulating layer, the bridges intersecting with the first sensing loops, the bridges penetrating the insulating layer and formed in contact with the second sensing loops; and

a transistor electrically connected to the gate line,

wherein the first sensing loops include first transmitting loops and first receiving loops,

wherein the second sensing loops include second transmitting loops and second receiving loops, and

wherein the first transmitting loops and the second transmitting loops are disposed on a first layer, and the first receiving loops and the second receiving loops are disposed on a second layer that is different from the first layer.

12. The display substrate of claim 11, wherein the bridges are disposed at the passing regions.

13. The display substrate of claim 11, wherein the first and second sensing loops and the gate line include a same conductive material.

14. The display substrate of claim 11, wherein the bridges and a source or a drain electrode of the transistor are disposed on another same layer.

15. The display substrate of claim 11, wherein the bridges and a data line connected to the transistor are disposed on another same layer.