Display Window Cut Surface Polishing Without Chemical Etchants
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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 softer polishing pad and slurry, and curing to remove defects and enhance flexural strength, while avoiding chemical etchants and reducing environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If chemical polishing with etchant is used on window cut surfaces, then defects are removed, but grains are formed on the edge and impact strength decreases
Solution Approach 1:
The patent replaces chemical polishing with mechanical polishing. Instead of using chemical etchants that cause grain formation, the invention uses a mechanical polishing pad with slurry to physically remove defects from the cut surface, thereby maintaining impact strength while achieving surface quality improvement
Solution Approach 2:
The patent changes the polishing parameters by using a polishing pad with specific hardness (softer than the window material) and controlling the slurry application, transforming the polishing process from chemical to mechanical while optimizing surface quality without compromising strength
2Manufacturing precision
If chemical etchants are used for polishing, then cut surface defects are removed, but environmental pollution is caused
Solution Approach 1:
The patent substitutes mechanical polishing for chemical polishing, eliminating the use of harmful chemical etchants entirely. The mechanical polishing process using abrasive slurry achieves the same defect removal function without generating chemical pollution, thereby resolving the environmental contradiction
Solution Approach 2:
The patent converts the potentially harmful chemical process into a beneficial mechanical process. By replacing etchants with mechanical polishing, the invention transforms a pollution-causing operation into an environmentally friendly one while maintaining or improving cut surface quality
3Ease of manufacture
If windows are cut to size during manufacturing, then they fit the display device, but the cut surface has defects requiring additional polishing
Solution Approach 1:
The patent performs preliminary cutting to size during the manufacturing process, then follows up with polishing to correct the surface defects. This sequence of operations allows efficient cutting while subsequently improving surface quality, resolving the contradiction between ease of manufacture and manufacturing precision
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 impact strength of window cut surfaces by reducing roughness and avoiding chemical reactions, and eliminates environmental pollution from chemical etchants, resulting in a more robust and eco-friendly manufacturing process.
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.