Etching Adhesive Tape for Touch Screen Silicon Oxynitride Removal

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Solution Overview

Problem

Current methods for removing silicon oxynitride layers in touch screen production are inefficient, leading to high etching paste waste, increased production costs, and decreased production line efficiency due to the use of consumptive materials and manual screen printing processes.

Innovation Solution

An etching adhesive tape with a base sheet and a functional layer containing an etching paste applied only to the region to be etched, allowing for precise etching and reduced material consumption, combined with a method of attaching and removing the tape to achieve high etching accuracy and low paste consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of substance

If screen printing method is used to remove silicon oxynitride layer, then etching can be performed, but etching paste is wasted and production cost increases

Engineering Contradiction:

Improveetching paste consumptionVSAvoidmanufacturing process complexity

Core Design Contradiction:

Loss of substanceVSEase of manufacture

Solution Approach 1:

The etching paste is segmented and applied only to the specific region where the silicon oxynitride layer needs to be removed, rather than coating the entire surface. This is achieved by dividing the base sheet into a first region (with etching paste) and a second region (without etching paste), allowing precise localized etching and reducing paste waste.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The base sheet is designed with non-uniform properties: the first region has etching paste coating while the second region does not. This local differentiation enables the etching function to be applied only where needed, improving etching paste utilization and reducing overall consumption.

Inventive Principle:

Principle #3Local quality

2Productivity

If screen printing method is used, then etching can be performed, but consumptive materials are needed and production line operation ratio decreases

Engineering Contradiction:

Improveproduction line operation ratioVSAvoidmanufacturing equipment requirements

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The etching adhesive tape is prepared in advance with the etching paste pre-applied to the first region. This preliminary preparation eliminates the need for on-line screen printing operations, allowing the tape to be directly applied and torn off after etching, thereby increasing production line operation ratio and reducing equipment requirements.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The screen printing plate and associated consumptive materials are extracted from the manufacturing process. Instead of using screen printing equipment to apply etching paste, the paste is pre-applied during tape manufacturing, removing the need for specialized equipment and reducing operational complexity.

Inventive Principle:

Principle #2Taking out (Extraction)

3Manufacturing precision

If etching paste is coated on the region to be etched, then silicon oxynitride layer can be removed, but over-etching may occur and etching accuracy decreases

Engineering Contradiction:

Improveetching accuracyVSAvoidetching paste consumption

Core Design Contradiction:

Manufacturing precisionVSLoss of substance

Solution Approach 1:

The base sheet is divided into a first region (with etching paste) and a second region (without etching paste). This segmentation ensures that etching paste is applied only to the precise region where the silicon oxynitride layer needs to be removed, preventing over-etching and improving etching accuracy while reducing paste consumption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The base sheet has different properties in different regions: the first region contains etching paste for localized etching, while the second region does not. This local quality differentiation ensures precise etching boundaries and prevents paste waste, simultaneously improving both etching accuracy and material utilization.

Inventive Principle:

Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution reduces etching paste consumption, decreases production costs, and enhances etching accuracy, simplifying the process while avoiding over-etching and manual cleaning, thus improving product yield and manufacturing efficiency.

Implementation Method 1

coating the etching paste to the region of interest on the touch screen... the silicon oxynitride layer in the region can be removed along with the water cleaning

Methodology Applied

Scientific EffectChemical etching: Chemical Bonding

Data Source

PatentUS9909037B2Etching adhesive tape, method of manufacturing the same and etching method

Publication Date: 2018.03.06 BOE TECHNOLOGY GROUP CO LTD

AI summary

An etching adhesive tape for manufacturing a touch screen and a manufacturing method thereof, and an etching method are disclosed. The etching adhesive tape includes a base sheet and a functional layer disposed on the base sheet, the functional layer includes a first region corresponding to a region to be etched, and the first region includes an etching paste.