Composite-Coated Glass Panel for Scratch Resistance and Optical Clarity
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Solution Overview
Problem
Existing glass panels in terminal devices suffer from limited scratch resistance, easy detachment of protective films, significant color difference, and reduced transmittance due to externally applied protective coatings.
Innovation Solution
A composite film layer with specific structural components, including a first base layer, barrier layers, a diamond-like carbon film layer, and an anti-fingerprint layer, is coated on the glass panel substrate to enhance scratch resistance, adhesion, and maintain optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an externally attached protective film is used to improve scratch resistance, then the scratch resistance capability is improved, but the optical characteristics deteriorate and component costs increase
Solution Approach 1:
The protective film is merged with the glass panel substrate through external coating to form an integrated structure, eliminating the need for separate attachment while maintaining scratch resistance and optical properties
Solution Approach 2:
A composite film layer comprising multiple functional layers (first base layer, first barrier layer, diamond-like carbon film layer, second barrier layer, second base layer, and anti-fingerprint layer) is applied to provide both protective and optical functions simultaneously
2Strength
If an externally coated protective film is applied to improve scratch resistance, then the scratch resistance capability is improved, but the protective film easily detaches due to insufficient adhesion
Solution Approach 1:
The protective film is segmented into multiple functional layers, each performing specific functions: the first base layer provides adhesion to the substrate, the diamond-like carbon film layer provides scratch resistance, and the anti-fingerprint layer provides surface protection, with barrier layers preventing inter-layer diffusion
Solution Approach 2:
The first base layer is applied in advance to the glass panel substrate to establish strong adhesion before subsequent protective layers are deposited, ensuring the entire composite film remains firmly attached
3Strength
If a protective film is coated on the glass panel surface to improve scratch resistance, then the scratch resistance capability is improved, but significant color difference occurs before and after coating
Solution Approach 1:
Each layer in the composite film is designed with specific local properties: the diamond-like carbon film layer provides hardness and scratch resistance, while the barrier layers control optical properties to minimize color difference, and the anti-fingerprint layer provides surface characteristics
Solution Approach 2:
The composite structure combines materials with complementary properties, where the diamond-like carbon film provides protective functions and the barrier layers (SiNx, CNx, SiCx, or SiNxCy) are selected to maintain optical transparency and minimize color change
4Strength
If a protective film is coated on the glass panel surface to improve scratch resistance, then the scratch resistance capability is improved, but transmittance is reduced
Solution Approach 1:
The thickness parameters of each layer in the composite film are precisely controlled within specific ranges to optimize the balance between protective function and optical transmission, ensuring minimal impact on transmittance while maintaining scratch resistance
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 composite film layer improves Mohs hardness, reduces color difference, and maintains high transmittance, ensuring long-term reliability and improved user experience.
Implementation Method 1
a diamond-like carbon film layer
Implementation Method 2
can avoid adverse effects such as oxidation of the diamond-like carbon film layer during preparation of the composite film layer and during use of the glass panel
Data Source
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AI summary
A glass panel (100) is provided, including a glass panel substrate (10) and a composite film layer (20) disposed on a surface of the glass panel substrate (10). The composite film layer (20) includes a first base layer (21), a first barrier layer (22), a diamond-like carbon film layer (23), a second barrier layer (24), a second base layer (25), and an anti-fingerprint layer (26) that are sequentially stacked. The glass panel (100) is coated with the composite film layer (20) having a specific structure on the surface of the glass panel substrate (10), so that the glass panel (100) can have high Mohs hardness, to improve a scratch resistance capability of the glass panel (100). In addition, the composite film layer (20) has strong adhesion to the surface of the substrate and is not easily detached. The composite film layer (20) can further reduce a color difference before and after coating to a specific extent, and increase transmittance. A display (200) and a terminal (300) that include the glass panel (100) are further provided.