Display Window Edge Polishing Without Chemical Etching
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Solution Overview
Problem
Chemical polishing of window cut surfaces in display devices leads to grain formation and reduced impact strength due to chemical reactions, and existing methods can cause environmental pollution.
Innovation Solution
A method involving alternately stacking windows and adhesive layers, cutting, polishing with a pad of lower elastic modulus, and curing using UV and hot water to separate the windows, which reduces surface roughness and enhances impact strength without chemical etchants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If chemical polishing is used to remove defects from the cut surface of the window, then the surface quality is improved, but grains are formed on the edge and impact strength decreases
Solution Approach 1:
The patent replaces chemical polishing with mechanical polishing using a polishing pad and slurry. This substitution eliminates the chemical reaction that causes grain formation while achieving smooth surface finish through mechanical abrasion, thereby resolving the contradiction between surface quality improvement and impact strength maintenance
Solution Approach 2:
The patent changes the polishing parameters by using a polishing pad with elastic modulus less than that of the window material, and controlling the slurry application. This parameter optimization allows effective defect removal while minimizing material removal from the edge, preserving impact strength
2Manufacturing precision
If chemical etching is used to polish the cut surface, then surface defects are removed, but environmental pollution is caused
Solution Approach 1:
The patent replaces chemical etching processes with mechanical polishing using a polishing pad and slurry. This substitution eliminates the use of harmful chemical etchants that cause environmental pollution, while still achieving the desired surface quality through mechanical means
Solution Approach 2:
The patent converts the potentially harmful chemical polishing process into a beneficial mechanical polishing process. By using mechanical abrasion with slurry instead of chemical etchants, the process achieves surface defect removal without generating harmful chemical waste, turning a harmful process into an environmentally friendly one
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 method improves the flexural strength and impact resistance of the window surfaces by mechanical polishing, reducing environmental impact and maintaining the flexibility of the windows.
Implementation Method 1
polishing a cut surface of the single stack using a polishing pad while a slurry is applied to the cut surface of the single stack
Implementation Method 2
The curing may include exposing the single stack to UV light
Implementation Method 3
emerging the single stack into a bath of hot water
Data Source
AI summary
A method of manufacturing a window may include cutting a window having a uniform thickness of about 20 μm to about 100 μm and polishing a cut surface of the window with a polishing pad having an elastic modulus less than an elastic modulus of the window while applying slurry to the cut surface of the window.