# US 12,001,621 B1 · Touch module, touch display module and manufacturing method of touch module

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- Number: US 12,001,621 B1
- Document ID: US12001621B1
- Status: Granted
- Kind: B1
- Application number: 18/127,614
- Filed: 2023-03-28
- Granted: 2024-06-04
- Earliest claimed: 2023-03-01
- Assignees: HengHao Technology Co. LTD
- Applicants: Henghao Technology Co., Ltd.
- Inventors: Shih-Chung Lu; Ming-Hung Yang; Ching-Yu Tsai; Kuan-Jen Chen
- Web page: https://patentgrep.com/patent/US12001621B1

## CPC

- G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- B32B 27/281: {comprising polyimides}
- B32B 27/36: comprising polyesters
- G02F 1/133311: {Environmental protection, e.g. against dust or humidity}
- G02F 1/13338: {Input devices, e.g. touch panels}
- G06F 3/0412: {Digitisers structurally integrated in a display}
- H10K 59/873: {Encapsulations}
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/20: Inorganic coating
- B32B 2255/205: Metallic coating
- B32B 2255/28: Multiple coating on one surface
- B32B 2457/202: LCD, i.e. liquid crystal displays
- B32B 2457/206: Organic displays, e.g. OLED
- B32B 2457/208: Touch screens
- G02F 2201/50: Protective arrangements
- G06F 2203/04102: Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- H10K 59/40: OLEDs integrated with touch screens
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A touch module includes a flexible base, a moisture blocking film and a touch structure. The moisture blocking film has a first surface and a second surface opposite to the first surface, and the first surface directly contacts the flexible base. The touch structure is disposed on the second surface of the moisture blocking film and includes a first conductive layer disposed on the second surface, a first insulating layer disposed on the first conductive layer, a second conductive layer disposed on the first insulating layer and a second insulating layer disposed on the second conductive layer. An area of the moisture blocking film is greater than or equal to the sum of the areas of the touch electrode region and the peripheral circuit region of the touch structure. The water vapor transmission rate of the moisture blocking film is less than 5.0*10−4 g/(m2*day).

## Claims

### Claim 1

A touch display module, comprising:
a touch module, comprising:
a flexible base, wherein a thickness of the flexible base ranges from 25 micrometers to 100 micrometers;
a moisture blocking film disposed on the flexible base, wherein the moisture blocking film has a first surface and a second surface opposite to the first surface, the first surface directly contacts the flexible base, and a thickness of the moisture blocking film ranges from 1 micrometer to 5 micrometers; and
a touch structure disposed on the second surface of the moisture blocking film, comprising:
a first conductive layer directly disposed on the second surface of the moisture blocking film;
a first insulating layer disposed on the first conductive layer and covering the first conductive layer;
a second conductive layer directly disposed on the first insulating layer; and
a second insulating layer disposed on the second conductive layer and covering the second conductive layer; and
a display module attached to the touch module, wherein the display module comprises a first substrate, a second substrate and a display medium layer disposed between the first substrate and the second substrate, and the touch structure is located between the display module and the moisture blocking film,
wherein the touch structure has a touch electrode region and a peripheral circuit region, and an area of the moisture blocking film is greater than or equal to a sum of an area of the touch electrode region and an area of the peripheral circuit region in a top view direction of the touch module;
wherein a water vapor transmission rate of the moisture blocking film is less than 5.0*10−4 g/(m2*day) at a temperature of 60° C. and a relative humidity of 90%;
wherein the area of the moisture blocking film is greater than an area of the display module.

### Claim 2 (depends on 1)

The touch display module of claim 1, wherein the flexible base includes polyimide, polyethylene terephthalate or a combination thereof.

### Claim 3 (depends on 1)

The touch display module of claim 1, wherein the moisture blocking film includes silicon oxide, silicon nitride, silicon oxynitride or a combination thereof.

### Claim 4 (depends on 1)

The touch display module of claim 1, wherein the area of the moisture blocking film is greater than the area of the touch electrode region in the top view direction of the touch module.

### Claim 5 (depends on 1)

The touch display module of claim 1, wherein the display module has a display region, and the area of the moisture blocking film is greater than an area of the display region in the top view direction of the touch module.

### Claim 6 (depends on 1)

The touch display module of claim 1, wherein the display module includes a liquid crystal display panel, an organic light emitting diode display panel, a micro light emitting diode display panel or a mini light emitting diode display panel.

### Claim 7

A manufacturing method of a touch display module, comprising:
forming a touch module, comprising:
providing a flexible base;
forming a moisture blocking film on the flexible base, wherein the moisture blocking film has a first surface and a second surface opposite to the first surface, and the first surface directly contacts the flexible base; and
forming a touch structure on the moisture blocking film, comprising following steps:
forming a first conductive layer on the second surface of the moisture blocking film, wherein the first conductive layer directly contacts the second surface;
forming a first insulating layer on the first conductive layer, wherein the first insulating layer covers the first conductive layer;
forming a second conductive layer on the first insulating layer; and
forming a second insulating layer on the second conductive layer, wherein the second insulating layer covers the second conductive layer; and
attaching the touch module to a display module, wherein the display module comprises a first substrate, a second substrate and a display medium layer disposed between the first substrate and the second substrate, and the touch structure is located between the display module and the moisture blocking film,
wherein a water vapor transmission rate of the moisture blocking film is less than 5.0*10−4 g/(m2*day) at a temperature of 60° C. and a relative humidity of 90%;
wherein an area of the moisture blocking film is greater than an area of the display module.

### Claim 8 (depends on 7)

The manufacturing method of claim 7, wherein a thickness of the flexible base ranges from 25 micrometers to 100 micrometers, and a thickness of the moisture blocking film ranges from 1 micrometer to 5 micrometers.

### Claim 9 (depends on 7)

The manufacturing method of claim 7, wherein the flexible base includes polyimide, polyethylene terephthalate or a combination thereof, and the moisture blocking film includes silicon oxide, silicon nitride, silicon oxynitride or a combination thereof.