Pressure-sensitive touch panel, method for manufacturing the same, and touch display screen

Patent metadata

Field	Value
Publication number	US-10318039-B2
Application number	US-201715649965-A
Country	US
Kind code	B2
Filing date	Jul 14, 2017
Priority date	Jul 15, 2016
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

A pressure-sensitive touch panel, a method for manufacturing the pressure-sensitive touch panel, and a touch display screen are provided. The pressure-sensitive touch panel includes a substrate and a touch sensor and a pressure sensor arranged on the substrate. The touch sensor includes a first electrode and a second electrode, and the pressure sensor includes an upper electrode, a lower electrode and a dielectric layer arranged between the upper electrode and the lower electrode. The upper electrode and the first electrode are arranged in the same layer and formed of the same material, the lower electrode and the second electrode are arranged in the same layer and formed of the same material, and the dielectric layer is formed of an elastic insulation material.

First claim

What is claimed is:

1. A pressure-sensitive touch panel, comprising:
a substrate;
a plurality of touch sensors arranged on the substrate;
a plurality of pressure sensors arranged on the substrate; and
a metal layer arranged on both the plurality of pressure sensors and the plurality of touch sensors, and comprising a first peripheral lead, a second peripheral lead, a third peripheral lead, and a fourth peripheral lead,
wherein each touch sensor of the plurality of touch sensors comprises a first electrode and a second electrode, and each pressure sensor of the plurality of pressure sensors comprises an upper electrode, a lower electrode, and a dielectric layer arranged between the upper electrode and the lower electrode, the second electrode directly contacts the substrate, the upper electrode and the first electrode are arranged in the same layer and are formed of the same material, the lower electrode and the second electrode are arranged in the same layer and are formed of the same material, and the dielectric layer is formed of an elastic insulation material, and the first peripheral lead is connected to the upper electrode, the second peripheral lead is connected to the lower electrode, the third peripheral lead is connected to the first electrode, and the fourth peripheral lead is connected to the second electrode.

2. The pressure-sensitive touch panel according to claim 1 , wherein the touch sensor further comprises an insulation layer arranged between the first electrode and the second electrode, a material of the insulation layer is the same as that of the dielectric layer, and the insulation layer and the dielectric layer are arranged in the same layer or are the same film layer.

3. The pressure-sensitive touch panel according to claim 2 , wherein the insulation layer and the dielectric layer are formed of photoresist.

4. The pressure-sensitive touch panel according to claim 1 , wherein a thickness of the dielectric layer is in the range of 1.5 microns to 3 microns.

5. The pressure-sensitive touch panel according to claim 1 , wherein the plurality of pressure sensors is arranged at a periphery of the substrate.

6. The pressure-sensitive touch panel according to claim 4 , wherein at least one of the plurality of pressure sensors is arranged at each corner of the substrate.

7. The pressure-sensitive touch panel according to claim 1 , wherein a through hole is arranged in the dielectric layer, and the second peripheral lead is connected to the lower electrode via the through hole.

8. The pressure-sensitive touch panel according to claim 1 , wherein the first electrode is a driving electrode, and the second electrode is a sensing electrode; or
the first electrode is a sensing electrode, and the second electrode is a driving electrode.

9. A touch display screen, comprising:
the pressure-sensitive touch panel according to claim 1 .

10. The pressure-sensitive touch panel according to claim 1 , wherein, the plurality of touch sensors are arranged in multiple rows and multiple columns, two pressure sensors of the plurality of pressure sensors are arranged to a left side and a right side of each row of touch sensors in the plurality of four touch sensors, respectively.

11. The pressure-sensitive touch panel according to claim 1 , wherein the first peripheral lead and the second peripheral lead are arranged to a first side and a second side of the plurality of touch sensors, and the fourth peripheral lead is arranged to the second side of the plurality of touch sensors, and the third peripheral lead is arranged to a third side of the plurality of touch sensors.

12. The pressure-sensitive touch panel according to claim 11 , wherein, the first side and the second side are opposite to each other.

13. A method for manufacturing a pressure-sensitive touch panel, wherein the pressure-sensitive touch panel includes a substrate, a plurality of touch sensors arranged on the substrate, a plurality of pressure sensors arranged on the substrate, and a metal layer arranged on both the plurality of pressure sensors and the plurality of touch sensors, the metal layer including a first peripheral lead, a second peripheral lead, a third peripheral lead, and a fourth peripheral lead, wherein each touch sensor of the plurality of touch sensors includes a first electrode and a second electrode, and each pressure sensor of the plurality of pressure sensors includes an upper electrode, a lower electrode, and a dielectric layer arranged between the upper electrode and the lower electrode, the second electrode directly contacts the substrate, the upper electrode and the first electrode are arranged in the same layer and are formed of the same material, the lower electrode and the second electrode are arranged in the same layer and are formed of the same material, and the dielectric layer is formed of an elastic insulation material, and the first peripheral lead is connected to the upper electrode, the second peripheral lead is connected to the lower electrode, the third peripheral lead is connected to the first electrode, and the fourth peripheral lead is connected to the second electrode, the method comprising:
forming second electrodes of the plurality of touch sensors and lower electrodes of the plurality of pressure sensors on the substrate by a first patterning process, wherein the second electrodes directly contact the substrate;
forming an insulation layer of each touch sensor of the plurality of touch sensors on the second electrode of the touch sensor and forming the dielectric layer of each pressure sensor of the plurality of pressure sensors on the lower electrode of the pressure sensor by a second patterning process;
forming first electrodes of the plurality of touch sensors on the insulation layer and forming upper electrodes of the plurality of pressure sensors on the dielectric layer by a third patterning process;
forming the metal layer on the plurality of pressure sensors and the plurality of touch sensors; and
removing a portion of the metal layer by a fourth patterning process, so as to form the first peripheral lead connected to the upper electrode and the second peripheral lead connected to the lower electrode, and the third peripheral lead connected to the first electrode and the fourth peripheral lead connected to the second electrode.

14. The method according to claim 12 , further comprising:
forming a protection layer on the metal layer.

15. The method according to claim 13 , wherein forming an insulation layer of each touch sensor of the plurality of touch sensors on the second electrode of the touch sensor and forming the dielectric layer of each pressure sensor of the plurality of pressure sensors on the lower electrode of the pressure sensor by the second patterning process, comprises:
coating photoresist on the second electrode and the lower electrode; and
forming the insulation layer and the dielectric layer by the second patterning process.

16. The method according to claim 13 , wherein the plurality of pressure sensors is arranged at a periphery of the substrate.

17. The method according to claim 16 , wherein at least one of the plurality of pressure sensors is arranged at each corner of the substrate.

18. The method according to claim 13 , wherein after forming an insulation layer of each touch sensor of the plurality of touch sensors on the second electrode of the touch sensor and forming the dielectric layer of each pressure sensor of the plurality of pressure sensors on the lower electrode of the pressure sensor by a second patterning pro

Assignees

• Boe Technology Group Co Ltd
• Hefei Xinsheng Optoelectronics Technology Co Ltd

Inventors

• Xu Jiawei
• Wang Qingpu
• Li Youlu

Classifications

• G06F3/044

  by capacitive means · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/0414 Primary

  using force sensing means to determine a position · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title