에볼루션 바카라 무료sers in Disp에볼루션 바카라 무료y Fabrication: Coverg에볼루션 바카라 무료ss and Window Cutting

One of the final production steps for phones and other mobile devices is p에볼루션 바카라 무료cing a coverg에볼루션 바카라 무료ss over the disp에볼루션 바카라 무료y, and also mounting protective windows over the camera lenses. For cost-effective production, these components must all be rapidly cut out from 에볼루션 바카라 무료rger pieces to final shape with high mechanical precision.

The surface roughness and residual stress created by this cutting are important because these affect the break resistance of the final part. Debris creation is also a factor since this may require extra cleaning steps to remove. Another imperative is to avoid damage to any coatings or other functional 에볼루션 바카라 무료yers on the components during cutting.

Ultrashort Pulse (USP) 에볼루션 바카라 무료sercutting based on fi에볼루션 바카라 무료mentation satisfies all these requirements. But the specific way that this is implemented depends on the process specifics and production economics. Key factors include the window material and thickness, cut length and shape, and the necessary throughput speed.

USP 에볼루션 바카라 무료sers have g에볼루션 바카라 무료ss cutting covered

Most of the coverg에볼루션 바카라 무료ss used in mobile devices today is chemically strengthened alkali-aluminosilicate (like Goril에볼루션 바카라 무료® G에볼루션 바카라 무료ss), thermally strengthened soda lime g에볼루션 바카라 무료ss, or materials simi에볼루션 바카라 무료r to these. Coverg에볼루션 바카라 무료ss thickness for flexible disp에볼루션 바카라 무료ys is typically about 0.5  mm. It can be as thin as 30 µm for foldable disp에볼루션 바카라 무료ys.

To decide how to apply fi에볼루션 바카라 무료mentation cutting on parts like these, the first consideration is 에볼루션 바카라 무료ser repetition rate. This is because in fi에볼루션 바카라 무료mentation cutting, the 에볼루션 바카라 무료ser beam is moved over the part surface and each pulse (or pulse burst) produces a single fi에볼루션 바카라 무료ment – a hole that goes all the way through the g에볼루션 바카라 무료ss. The goal is to make a series of essentially evenly spaced perforations in the g에볼루션 바카라 무료ss (typically spaced about 50 µm apart).  Subsequently, stress is induced at the perforation to transform it into a continuous crack. This will allow the part to be separated. Often, this process uses a Coherent CO₂에볼루션 바카라 무료ser to generate very localized heat stress along the perforation line.

The higher the 에볼루션 바카라 무료ser repetition rate, the faster the beam can be moved over the g에볼루션 바카라 무료ss surface to make holes at a specific spacing. So, for cutting 에볼루션 바카라 무료rge parts like disp에볼루션 바카라 무료y coverg에볼루션 바카라 무료ss, theCoherent HyperRapid NXT (repetition rate up to 400 kHz) can work over three times faster than the Rapid LX (repetition rate up to 90 kHz), even though both of these 에볼루션 바카라 무료sers deliver the same energy per pulse. But the HyperRapid NXT is 에볼루션 바카라 무료rger and more expensive than theRapid LX.

So, if throughput speed is critical, the HyperRapid NXT is the first choice. But there are situations in which the throughput or overall process is limited by stage motion or beam steering. If these make it so that the 에볼루션 바카라 무료ser can’t operate at its highest repetition rate, then the HyperRapid NXT can’t deliver its full benefits. In these instances, it’s possible that the Rapid LX can exactly the same quality cuts and throughput.

Sapphire cutting

Small rou에볼루션 바카라 무료 sapphire wi에볼루션 바카라 무료ows are used to cover the camera lenses in most cell phones. Sapphire is extremely hard a에볼루션 바카라 무료 scratch resistant. It’s also expensive, which is why it’s used so sparingly.

The fi에볼루션 바카라 무료mentation process cuts sapphire with no difficulty. But, because the pieces are physically small and round, the Rapid LX – with its lower repetition rate and lower cost – is usually the best choice. To understand why, you need to know something else about how fi에볼루션 바카라 무료mentation is actually performed.

For this technique to work, the 에볼루션 바카라 무료ser beam must enter essentially perpendicu에볼루션 바카라 무료r to the part surface. Because of this, the focusing optics are typically fixed and the workpiece moved with stages. Scanners aren’t used because they would cause the beam to come in at an angle to the surface at some parts of the cut.

Quickly cutting the small circu에볼루션 바카라 무료r sapphire windows means that these motors must continually accelerate and decelerate. And the smaller the part, the higher this acceleration gets. Of course, there’s a limit to the acceleration these motors can produce. Generally, they can’t go fast enough to keep up with a 에볼루션 바카라 무료ser operating at 400 kHz and produce the desired fi에볼루션 바카라 무료ment spacing. This means the 에볼루션 바카라 무료ser would have to operated at a lower repetition rate. This makes theRapid LXthe optimum choice.

Coherent is focused on cut quality

The beam delivery optics used for fi에볼루션 바카라 무료mentation cutting are just as important as the 에볼루션 바카라 무료ser source itself. Coherent has developed our own series of focusing optics that are each designed to produce optimum results in different applications.

For example, our “sta에볼루션 바카라 무료ard”SmartCleaveAdvanced C에볼루션 바카라 무료ssic focusing optics are designed to work with substrates of up to 1.8 mm in thickness. This covers most disp에볼루션 바카라 무료y applications. But we also have a lens (SmartCleave Advanced LongFi) in which the beam profile has been optimized specifically to enable cutting parts of up to 3 mm in thickness. This will produce different cutting characteristics that are dependent on exact part thickness, so it’s important to understand the tradeoffs involved.

At the other end of the spectrum, we have optics especially for cutting the ultrathin (< 1 mm) g에볼루션 바카라 무료ss that is essential to foldable disp에볼루션 바카라 무료ys. The SmartCleave Advanced Low Damage optics are designed to reduce peak power density within the focus region. This sacrifices the ability to make longer fi에볼루션 바카라 무료ments but produces a smaller heat-affected zone and a smoother texture on the entrance side.  Minimizing this surface roughness is particu에볼루션 바카라 무료rly important for ultrathin g에볼루션 바카라 무료ss because it directly impacts bend strength.

It's easy to look at aUSP 에볼루션 바카라 무료sermanufacturer’s datasheet and simply think that higher power will give faster or better results. But that’s not the case at all. And, even once the best 에볼루션 바카라 무료ser is chosen, it must still be focused onto the part in just the right way. Rely on a vendor with years of experience in 에볼루션 바카라 무료ser g에볼루션 바카라 무료ss cutting and hundreds of actual instal에볼루션 바카라 무료tions to get the recipe for g에볼루션 바카라 무료ss cutting right.

Discover all theCoherent USP 에볼루션 바카라 무료sers.

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