Kerf width is one of the most important indicators when selecting an Aluminum Nitride Laser Cutting Machine, especially for DBC substrates, power electronics, RF ceramics, and semiconductor packaging. It directly affects material utilization, dimensional accuracy, and edge quality.
Under stable mass-production conditions, the achievable kerf width varies significantly depending on the laser wavelength and processing technology.
| Laser Type | Recommended Machine | Typical Thickness | Stable Production Kerf Width | Main Applications |
| 355 nm UV Nanosecond Laser | UV Laser Cutting Machine | 0.1–1.6 mm | 20–60 μm (Typical: 40–60 μm) | Semiconductor ceramic substrates, DBC/DPC, RF ceramics |
| 1064 nm QCW Fiber Laser | QCW Laser Cutting Machine | >1 mm | 80–150 μm | Thick AlN structural ceramics, high-efficiency cutting |
| Picosecond UV Laser | Picosecond Laser Cutting Machine | ≤1 mm | 10–30 μm | High-end semiconductor wafers, ultra-precision micromachining |
355 nm UV Laser (Recommended for Most AlN Substrates)
For thin AlN substrates used in semiconductor packaging, a 355 nm UV Laser Cutting Machine remains the mainstream industrial solution.
>>>Stable production kerf: 20–60 μm
>>>Typical production setting: 40–60 μm
>>>Optimized processes can achieve 15–20 μm kerfs with good consistency.
>>>Laboratory demonstrations may reach ≈10 μm, but such conditions generally sacrifice productivity and long-term process stability.
1064 nm QCW Fiber Laser
A QCW Laser Cutting Machine is better suited for thicker aluminum nitride ceramics where productivity is more important than minimum kerf width.
Typical characteristics include:
>>>Kerf width: 80–150 μm
>>>Higher cutting speed
>>>Larger heat-affected zone (HAZ)
>>>Greater risk of edge chipping compared with UV laser processing
Picosecond Laser
A Picosecond Laser Cutting Machine delivers the narrowest kerf and the highest edge quality.
Typical production capability:
>>>Kerf width: 10–30 μm
>>>Extremely small HAZ
>>>Minimal microcracks and recast layer
However, the equipment investment is significantly higher, and processing speed is generally lower than nanosecond UV systems.
Engineering Recommendation
For most industrial AlN substrate applications, a 355 nm UV Laser Cutting Machine provides the best balance between precision, throughput, and operating cost.
>>>Standard production kerf: 40–60 μm
>>>High-precision production: 20–30 μm
>>>QCW Fiber Laser: typically ≥80 μm, suitable for thicker ceramic components rather than precision semiconductor substrates.
>>>Picosecond Laser: best edge quality but typically reserved for ultra-high-value semiconductor applications where maximum precision outweighs equipment cost.
YCLASER specializes in precision laser cutting, drilling, and micromachining for advanced ceramic materials, including Al₂O₃, AlN, Si₃N₄, SiC, zirconia, DBC, and DPC substrates.
Free sample testing is available. Send us your drawings or samples, and our engineers will recommend the most suitable laser processing solution for your application.
