Metal Oxide Coating Texture via Hardness and Gloss Control
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Solution Overview
Problem
Conventional surface finishing techniques such as resin coating and metal plating are limited in providing unique textures and luxurious qualities to electronic and automotive components, hindering product satisfaction and design possibilities.
Innovation Solution
A metal oxide-containing coating with a Vickers hardness of 350 or higher, a surface roughness of 300 nm or less, and a 20° gloss value of 50 or higher is applied using methods like spraying, CVD, or PVD, along with a two-step polishing process using different abrasive compositions to achieve a luxurious and aesthetically appealing surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional resin coating or metal plating is used for surface finishing, then the surface can be protected and designed, but the texture and luxurious quality are limited and cannot provide unique tactile experience
Solution Approach 1:
The invention changes the material parameter from conventional resin or metal plating to metal oxide-containing coating, which fundamentally alters the surface properties. This material substitution enables new texture characteristics including tactile warmth, visual depth, and unique luster that cannot be achieved with traditional coating materials, directly resolving the limitation in texture variety
2Adaptability or versatility
If metal oxide coating is applied to provide unique texture, then the surface gains luxurious quality and different texture, but the manufacturing process becomes more complex
Solution Approach 1:
The invention incorporates porosity control as a preliminary action during coating formation. By pre-establishing the porous structure with controlled pore distribution and size before final polishing, the coating achieves both unique texture characteristics and facilitates subsequent polishing to high gloss. This preliminary structuring simplifies the overall process by enabling one-step polishing to achieve both texture and luster
3Illumination intensity
If the metal oxide-containing coating is made highly smooth to achieve luster, then the gloss value increases, but the unique texture and tactile quality may be reduced
Solution Approach 1:
The invention applies local quality by creating a hierarchical surface structure where the coating has controlled porosity at the microscopic level (providing unique texture and tactile warmth) while maintaining a smooth macroscopic surface (providing high gloss and luster). The porous structure exists within the coating bulk, while the surface remains polished to high reflectivity, allowing both texture and gloss to coexist through different spatial scales
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 provides a surface with a unique texture and luxurious quality comparable to pottery and porcelain, enhancing consumer satisfaction and design features while maintaining strength and durability.
Implementation Method 1
The metal oxide-containing coating is a coating formed by a spraying method, chemical vapor deposition (CVD) method or physical vapor deposition (PVD) method
Implementation Method 2
The metal oxide-containing coating is a coating formed by a spraying method, chemical vapor deposition (CVD) method or physical vapor deposition (PVD) method
Implementation Method 3
a first polishing composition to be supplied to the metal oxide-containing coating and a second polishing composition to be supplied to the metal oxide-containing coating after the supply of the first polishing composition
Data Source
AI summary
Provided is an article having a novel surface with a texture different from conventional kinds. The article having a metal oxide-containing coating provided by the present invention comprises a substrate and a metal oxide-containing coating provided to the substrate surface. The metal oxide-containing coating has a Vickers hardness of 350 or higher, a surface roughness Ra of 300 nm or less, and a 20° gloss value of 50 or higher.