Touch device and manufacturing method thereof

• US 10,037,113 B2
• Filed: 10/11/2015
• Issued: 07/31/2018
• Est. Priority Date: 10/21/2014
• Status: Active Grant

• Current Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Original Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Inventors: Lin, Ching-Shan, Chiang, Cheng-Chung, Tseng, Chan-Hao
• Primary Examiner(s): Kim, Richard
• Application Number:
  US14/880,274
• Publication Number:
  US 20160117018A1
• Time in Patent Office: 1,024 Days
• Field of Search: None
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A touch device includes a cover plate, a carrying structure, a first sensor layer, a dielectric layer and a second sensor layer. The carrying structure is disposed on the cover plate and includes a film layer and a buffer layer stacked on each other. The film is located between the cover plate and the buffer layer. The first sensor layer is at least disposed on the carrying structure. The first sensor layer and the cover plate are respectively located at two opposite sides of the carrying structure. The dielectric layer is disposed on the first sensor layer. The dielectric layer and the carrying structure are respectively located at two opposite sides of the first sensor layer. The second sensor layer is at least disposed on the dielectric layer. The second sensor layer and the first sensor layer are respectively located at two opposite sides of the dielectric layer.

Claims

1. A manufacturing method of a touch device, comprising:

step (A1), providing a cover plate and a first substrate;

step (A2), forming a carrying structure on the first substrate, wherein the carrying structure includes a film;

step (A3), forming a plurality of first sensing electrodes on the carrying structure, wherein the first sensing electrodes and the cover plate are respectively located at two opposite sides of the carrying structure;

step (A4), forming a dielectric layer on the first sensing electrodes, wherein the dielectric layer and the film are respectively located at two opposite sides of the first sensing electrodes;

step (A5), forming a plurality of second sensing electrodes on the dielectric layer, wherein the first sensing electrodes and the second sensing electrodes are respectively located at two opposite sides of the dielectric layer;

step (A6), disposing a second substrate, wherein the second substrate and the dielectric layer are respectively located at two opposite sides of the second sensing electrodes; and

step (A7), removing the first substrate to form a structural assembly, wherein;

the cover plate is laminated to the film of the structural assembly, and

the manufacturing method further comprises;

step (D1), forming a first adhesive layer on a portion of a surface of the first substrate between the steps (A1) and (A2), wherein in the step (A2), the first adhesive layer is located between the film and the first substrate; and

step (D2), cutting along a periphery of the first adhesive layer between steps (A6) and (A7).

2. The manufacturing method of a touch device of claim 1, wherein:

the second substrate has polarity,

the step (A1) further includes providing a liquid crystal module,

the liquid crystal module includes a main body having liquid crystal molecules and a polarized layer,

the polarized layer has a polarity direction perpendicular to a polarity direction of the second substrate,

posterior to the step (A7), the manufacturing method further comprises step (B1), laminating the liquid crystal module and the second substrate, and

the polarized layer and the second substrate are respectively located at two opposite sides of the main body.

3. The manufacturing method of a touch device of claim 1, further comprising step (C1), removing the second substrate posterior to the step (A7).

4. The manufacturing method of a touch device of claim 1, wherein:

the carrying structure further includes a buffer layer,

in the step (A3), the first sensing electrodes is formed on the buffer layer, and

the first sensing electrodes and the film are respectively located at two opposite sides of the buffer layer.

5. The manufacturing method of a touch device of claim 1, further comprising step (E1), forming a protection layer on the second sensing electrodes between the steps (A5) and (A6), wherein:

the protection layer and the dielectric layer are respectively located at two opposite sides of the second sensing electrode,

in the step (A6), the second substrate is disposed on the protection layer, and

the second substrate and the second sensing electrodes are respectively located at two opposite sides of the protection layer.

6. The manufacturing method of a touch device of claim 1, wherein:

the step (A1) of providing the cover plate further includes forming a mask layer on the cover plate, and

in the step (A2), the mask layer is located between the cover plate and the film.

7. The manufacturing method of a touch device of claim 6, further comprising:

step (F1), forming a plurality of first wires on the carrying structure between the steps (A3) and (A4), wherein;

the first wires are respectively connected to the first sensing electrodes and have positions corresponding to the mask layer, and

the first wires and the cover plate are respectively located at two opposite sides of the carrying structure; and

step (F2), forming a plurality of second wires on the dielectric layer between the steps (A5) and (A6), wherein the second wires are respectively connected to the second sensing electrodes and have positions corresponding to the mask layer.

8. The manufacturing method of a touch device of claim 7, wherein:

the dielectric layer has an area smaller than that of the carrying structure, and

in the step (A5), the second wires extend across the dielectric layer to the carrying structure.

9. The manufacturing method of a touch device of claim 6, wherein:

in the step (A4), the first sensing electrodes are partially uncovered by the dielectric layer,

the manufacturing method further comprises the step (G1), forming a plurality of first wires on the carrying structure between the steps (A5) and (A6), wherein the first wires are respectively connected to the first sensing electrodes and have positions corresponding to the mask layer, and forming a plurality of second wires on the dielectric layer, wherein the second wires are respectively connected to the second sensing electrodes and have positions corresponding to the mask layer.

10. The manufacturing method of a touch device of claim 6, wherein:

in the step (A4), the dielectric layer is formed with a plurality of openings with positions corresponding to the first sensing electrodes,

the manufacturing method further comprises step (H1), forming a plurality of first wires and a plurality of second wires on the dielectric layer between the steps (A5) and (A6),

positions of the first wires correspond to the mask layer,

the first wires extend through the openings to be respectively connected to the first sensing electrodes,

positions of the second wires correspond to the mask layer, and

the second wires are respectively connected to the second sensing electrodes.

11. A manufacturing method of a touch device, comprising:

step (A1), providing a cover plate and a first substrate, wherein the cover plate includes a mask layer;

step (A2), forming a carrying structure on the first substrate, wherein;

the carrying structure includes a film, and

the mask layer is located between the cover plate and the film;

step (A3), forming a plurality of first sensing electrodes on the carrying structure, wherein the first sensing electrodes and the cover plate are respectively located at two opposite sides of the carrying structure;

step (A4), forming a dielectric layer on the first sensing electrodes, wherein;

the dielectric layer is formed with a plurality of openings with positions corresponding to the first sensing electrodes, and

the dielectric layer and the film are respectively located at two opposite sides of the first sensing electrodes;

step (A5), forming a plurality of second sensing electrodes on the dielectric layer, wherein the first sensing electrodes and the second sensing electrodes are respectively located at two opposite sides of the dielectric layer;

step (A6), disposing a second substrate, wherein the second substrate and the dielectric layer are respectively located at two opposite sides of the second sensing electrodes; and

step (A7), removing the first substrate to form a structural assembly, wherein;

the cover plate is laminated to the film of the structural assembly, and

the manufacturing method further comprises;

step (H1), forming a plurality of first wires and a plurality of second wires on the dielectric layer between the steps (A5) and (A6), wherein;

positions of the first wires correspond to the mask layer,

the first wires extend through the openings to be respectively connected to the first sensing electrodes,

positions of the second wires correspond to the mask layer, and

the second wires are respectively connected to the second sensing electrodes.

12. The manufacturing method of a touch device of claim 11, wherein:

the second substrate has polarity,

the step (A1) further includes providing a liquid crystal module,

the liquid crystal module includes a main body having liquid crystal molecules and a polarized layer,

the polarized layer has a polarity direction perpendicular to a polarity direction of the second substrate,

posterior to the step (A7), the manufacturing method further comprises step (B1), laminating the liquid crystal module and the second substrate, and

the polarized layer and the second substrate are respectively located at two opposite sides of the main body.

13. The manufacturing method of a touch device of claim 11, further comprising step (C1), removing the second substrate posterior to the step (A7).

14. The manufacturing method of a touch device of claim 11, wherein:

the carrying structure further includes a buffer layer,

in the step (A3), the first sensing electrodes is formed on the buffer layer, and

the first sensing electrodes and the film are respectively located at two opposite sides of the buffer layer.

15. The manufacturing method of a touch device of claim 11, further comprising step (E1), forming a protection layer on the second sensing electrodes between the steps (A5) and (A6), wherein:

the protection layer and the dielectric layer are respectively located at two opposite sides of the second sensing electrode,

in the step (A6), the second substrate is disposed on the protection layer, and

the second substrate and the second sensing electrodes are respectively located at two opposite sides of the protection layer.