Chemically strengthened glass promotes the popularization of smart phone glass cover
Chemically strengthened glass is a type of glass that undergoes a special treatment to enhance its durability and resistance to scratches. This technology became widely known when Apple's iPhone and iPad started using Corning's "Gorilla Glass," which is a prime example of chemically strengthened aluminosilicate glass. Previously, most mobile phone covers were made from plastic materials, but with the rise of smartphones and tablets, there was a growing need for more durable and scratch-resistant touchscreens. As a result, chemically strengthened glass became the preferred choice due to its high strength and smooth surface.
Gorilla Glass has dominated the market for a long time, with Asahi Glass's "Dragontrail" being a close competitor. While soda-lime glass can also be chemically strengthened, it doesn't offer the same level of performance as aluminosilicate glass. The latter is specifically designed to provide superior strength, making it ideal for use in modern electronic devices.
One of the key features of chemically strengthened aluminosilicate glass is its excellent bending and impact resistance. This makes it particularly suitable for smartphones and tablets where the screen is frequently touched and exposed to accidental drops or pressure.
The strengthening process involves replacing sodium ions on the surface of the glass with larger potassium ions through a process called ion exchange. This creates a layer of compressive stress on the surface, significantly increasing the glass's mechanical strength. This method not only improves the glass’s durability but also enhances its overall performance under daily usage conditions.
Recently, a new trend called "OGS" (One Glass Solution) has emerged. OGS refers to the integration of the touchscreen directly onto the glass cover, reducing the number of layers and improving the device's sensitivity and clarity. However, chemically strengthened glass presents some challenges when it comes to compatibility with this method. Due to its hardness, it is more difficult to cut and shape after the chemical strengthening process.
To address this issue, manufacturers have started producing larger sheets of chemically strengthened glass that are easier to cut before the final shaping. This allows for better cost efficiency when implementing the OGS technique. By combining multiple touch panel designs on a single sheet, they can optimize production and reduce waste. As a result, the adoption of OGS has become more feasible, especially with the availability of improved glass solutions.
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