Laser marking and engraving on Crystals
Crystal materials, such as sapphire and silicon, are widely used in consumer electronics applications. For example, sapphire is increasingly popular to be used in consumer electronics (e.g. cover window for watches and camera windows, substrate for LED and sensors, etc.).
As one of the hardest materials as known, sapphire is extremely difficult to be machined. Laser is the excellent candidate to be applied for sapphire machining, e.g. marking and engraving. Compared to conventional diamond tools, lasers are more affordable, accurate and flexible, without tooling wear but higher yield.
Selective material ablation is also able to be employed during the marking/engraving process without introducing cracks or weakness into the substrates.