The rapid growth of the semiconductor industry has spurred demand for advanced materials that deliver higher performance and greater efficiency. Among these materials, diamond, with its unique physical and chemical properties, is positioned to play an increasingly vital role in next-generation semiconductor devices. Known for its superior thermal conductivity, ultra-wide bandgap, and high charge carrier mobility, diamond is ideally suited for high-power, high-frequency, and high-temperature electronic devices. However, diamond’s extreme hardness presents a double-edged sword. While it contributes to its excellent performance characteristics, it also poses significant challenges for precision processing. Traditional mechanical cutting methods face limitations when it comes to processing diamond, resulting in material loss, low efficiency, and substantial costs. These issues become even more pressing when processing large-diameter diamonds, where maximizing yield and minimizing costs are critical.

In response to these challenges, Han’s Laser has made groundbreaking advancements with its QCBD laser slicing technology for diamond. This innovative approach significantly improves processing efficiency and yield while reducing production costs, laying the groundwork for diamond’s broad adoption across various high-tech sectors, including high-performance electronics, quantum computing, and high-power laser applications.

Principles of QCBD Laser Slicing Technology

The QCBD (Quantum-Controlled Birefringence Diamond) laser slicing technology leverages a laser to perform non-contact modifications within the diamond material, precisely controlling the laser’s position to enable material separation. The process comprises two key steps:

1.Modification Layer Creation

The laser beam is finely focused at a specific depth beneath the diamond’s surface, creating a modified layer. Here, the laser induces changes in the material’s physical and chemical properties, setting the stage for controlled crack propagation.

QCB technology application process

2.Controlled Fracture Propagation

External stress, such as mechanical or thermal stress, is then applied to guide the crack along the modified plane, allowing clean separation of the diamond wafers. The laser’s high energy density prompts rapid physical and chemical changes within the diamond, ensuring precision and efficiency throughout the process.

Unlike silicon carbide (SiC), diamond presents unique challenges due to the significant angular difference between its cleavage plane and slicing direction. This distinction requires precise control of laser energy and beam modulation to achieve consistent energy distribution and accurately guide crack propagation, resulting in smooth, even separation. Ultrafast laser pulses introduce high energy in extremely short durations and confined spaces, which promotes controlled, efficient material separation.

How Does QCBD Compare to Traditional Cutting Methods?

Compared to traditional mechanical cutting methods, QCBD laser slicing offers numerous advantages:

Non-Contact Process: As a non-contact method, laser slicing minimizes mechanical stress on the diamond, significantly reducing risks of fracture and micro-cracking.

Precision and Quality: The high accuracy of laser slicing is particularly advantageous for materials like diamond, which are extremely hard and brittle.

Enhanced Material Utilization: By reducing material waste and increasing processing efficiency, QCBD maximizes the use of high-value diamond materials, which is crucial for cost-effective manufacturing.

Diamond laser slicing surface roughness

Current Challenges and Advancements in Diamond Slicing Technology

While laser slicing technology for silicon carbide has advanced commercially, diamond slicing technology remains in the early stages of development. The unique properties of diamond present challenges in scaling up production while maintaining quality. Recent breakthroughs by Han’s Laser, however, mark a significant step forward in diamond processing. Their QCBD laser slicing equipment achieves high-quality, low-damage, and efficient diamond slicing, addressing a previously unmet need in the field.

Through meticulous control of laser energy and beam shaping, Han’s Laser has tackled the challenge of the angular disparity between diamond’s {111} cleavage plane and the {100} slicing direction, enabling precise and low-damage separation of diamond ingots. Research conducted by Han’s Laser QCB Laboratory indicates that this technology reduces post-slicing surface roughness to an Ra of less than 3μm and minimizes the laser-induced damage layer to approximately 20μm. These advancements significantly lower diamond processing costs and promote its applications in high-end fields such as electronics and optics.

Real-World Impact of Han’s Laser QCBD Technology

The successful development of QCBD laser slicing technology represents a transformative advancement in the processing of semiconductor materials. By overcoming key technical challenges in diamond processing, this technology accelerates production timelines, elevates product quality, and reduces manufacturing costs. These advantages position QCBD as a cornerstone technology with vast potential in high-tech manufacturing, likely to occupy a central role in the future of semiconductor material processing and setting a new standard in the industry.

This breakthrough not only promises to support broader adoption of diamond in next-generation electronics but also signals a new era for high-performance materials in advanced manufacturing.