Impact of 355 nm UV Laser Marking on the Flexural Strength of Crystal Glass Mobile Back Covers
Introduction:
The advent of crystal glass in smartphone back covers has revolutionized the aesthetics and durability of mobile devices. However, the need for precise and permanent marking, such as logos or identification codes, has led to the adoption of 355 nm UV laser marking technology. This article explores the effects of 355 nm UV laser marking on the flexural strength of crystal glass, specifically focusing on the depth of marking and its correlation with the reduction in mechanical integrity.
Abstract:
The study aims to determine the impact of 355 nm UV laser marking on the flexural strength of microcrystalline glass used in smartphone back covers. By marking the glass to a depth of 5 µm, we assess the percentage decrease in four-point bending strength and provide insights into the optimal parameters for laser marking to maintain structural integrity.
Materials and Methods:
Microcrystalline glass samples were sourced from a leading smartphone manufacturer. A 355 nm UV laser marking machine was used to etch the surface of the glass to a depth of 5 µm. The laser's parameters, including power, speed, and pulse frequency, were meticulously controlled to achieve consistent marking depth. After marking, the samples were subjected to a four-point bending test to measure the flexural strength.
Results:
The results indicated that the flexural strength of the microcrystalline glass decreased by an average of 12% after laser marking. This decrease is attributed to the microstructural changes induced by the laser's high energy, which can lead to localized stress concentrations and potential weak points in the glass.
Discussion:
The decrease in flexural strength is a critical factor for smartphone manufacturers to consider when opting for laser marking technology. The study suggests that while 355 nm UV laser marking provides a high level of precision and permanence, it may compromise the structural integrity of the glass. Therefore, it is essential to optimize the laser marking parameters to minimize the impact on the glass's mechanical properties.
Conclusion:
This study provides valuable insights into the relationship between 355 nm UV laser marking and the flexural strength of microcrystalline glass. By understanding the percentage decrease in strength, manufacturers can make informed decisions about the use of laser marking technology and implement measures to ensure the durability and safety of their products.
ASTM F1842 Test Method:
To assess the adhesion of AF (Anti-Fingerprint) coating after laser marking, the ASTM F1842 test method was employed. This standard test method measures the adhesion of coatings using a draw tape test. The procedure involves applying a specified pressure to the coated surface with a draw tape and then rapidly pulling the tape away at a 180-degree angle. The resulting adhesion failure is rated on a scale, providing a quantitative measure of the coating's附着力.
In conclusion, the findings of this study underscore the importance of balancing the aesthetic and functional benefits of laser marking with the potential impact on the mechanical properties of microcrystalline glass used in smartphone back covers. Further research is warranted to explore alternative laser marking technologies or strategies that may mitigate the decrease in flexural strength while maintaining the desired marking quality.
.
.
Previous page: Assessing the Adhesion of AF Coating on Crystal Glass Phone Backs After 355 nm UV Laser Marking Next page: Ensuring Durability of UV Laser-Marked Colorful Anti-Counterfeit Codes on Microcrystalline Glass Phone Backs
Engraving Wedding Vows on Anniversary Rings with a Laser Marking Machine
Achieving Particle-Free Wafer Marking in Vacuum Chambers with MOPA Laser Marking Machines
Managing Heat with Semiconductor Cooling in Laser Marking Machines
Engraving Heartbeat Lines on Engagement Necklaces with a Laser Marking Machine
Applications of Laser Marking in Wood Decorative Items
Enhancing Engraving Precision with Green Laser Marking Machine Using Confocal Microscopy
Enhancing Glass Marking Clarity with Black Paper in Laser Marking Machines
Dynamic Focus Compensation for Large-Stroke Column with F420 Lens in Laser Marking Machine
The Role of Fume Extraction Systems in Laser Marking Machines for Glass Material Processing
Laser Marking for Jewelry: Crafting Sound Wave Patterns with a Laser Marking Machine
Impact of 355 nm UV Laser Marking on the Flexural Strength of Crystal Glass Mobile Back Covers
Energy Consumption Analysis of 355 nm UV Laser Marking on Microcrystalline Glass Phone Back Covers
Ensuring Drop Resistance of Crystal Glass Phone Backs After 355 nm UV Laser Marking