Can KrF lasers unlock high-precision AI packaging? Gigaphoton’s bet explained

Gigaphoton Inc., a leading Japanese manufacturer of lightsource technology for semiconductor lithography, has completed the installation of its new excimer laser system at a domestic semiconductor research organization focused on next-generation chip development. The system, designated G300K, was delivered and successfully integrated in November 2025, and is expected to play a critical role in enabling advanced packaging workflows required for AI chiplets.

The installation signals a calculated move by Gigaphoton to expand beyond front-end lithography into backend processing, aligning with the semiconductor industry’s growing reliance on chiplet architectures for artificial intelligence workloads. The company confirmed that its G300K excimer laser has already been integrated into processing equipment built by ORC MANUFACTURING CO., LTD. and will be showcased at the upcoming SEMICON Japan 2025 conference on December 17.

The G300K system is based on krypton fluoride excimer laser technology operating at a 248 nm wavelength, offering the high precision and repeatability needed for micro-via hole drilling and trench patterning in substrate manufacturing. With the proliferation of 2.5D and 3D packages that stack memory and compute dies into complex structures, tools like the G300K are expected to become increasingly essential in manufacturing AI processors.

How is Gigaphoton’s G300K system aligned with the AI chiplet packaging roadmap?

Advanced packaging has become a critical enabler for scaling performance in artificial intelligence chips. As leading semiconductor firms transition to chiplet-based designs that decouple memory, logic, and accelerators into modular dies, backend manufacturing complexity has increased. In this context, the demand for precision laser tools that can pattern ultra-fine vias and trenches in organic substrates or silicon interposers has surged.

Gigaphoton’s G300K system is tailored to this requirement. The excimer laser operates at ultraviolet wavelengths suitable for ultra-fine ablation, delivering high power and high repetition rate performance with long-life modules designed for industrial reliability. The system is used to create micro-vias with diameters below 10 microns, as well as intricate trench geometries needed for chiplet interconnects and signal routing.

Such capabilities are crucial in manufacturing 2.5D and 3D packages where tight integration density and low resistance paths are essential to achieving the thermal and performance targets demanded by AI chip workloads. By offering a laser-based alternative to mechanical or chemical via drilling, the G300K delivers a cleaner, more precise, and potentially higher-yield solution for next-generation packaging needs.

Why is Japan focusing on backend tools as part of its semiconductor strategy?

The deployment of the G300K also reflects a broader strategic push by Japanese equipment manufacturers to expand their footprint across the semiconductor production chain, particularly in backend process steps that are gaining complexity and importance. While Japan remains a key supplier of materials and subcomponents to front-end lithography systems, its competitive edge in areas like excimer lasers, resist materials, and metrology remains underutilized in packaging workflows.

With chiplet architectures becoming central to the future of AI and high-performance computing, backend processing has moved into the strategic spotlight. Governments and equipment vendors alike are investing to build local capability in substrate manufacturing, die attachment, via drilling, and hybrid bonding technologies.

Gigaphoton’s move into this segment is timely. By leveraging its legacy in lithography lightsources and translating that precision engineering into backend substrate processing, the company is positioning itself as a critical enabler of the AI semiconductor value chain. The G300K’s compatibility with substrate tooling from ORC MANUFACTURING CO., LTD. further suggests domestic ecosystem integration is a key priority.

What makes the G300K competitive in high-volume precision processing?

The technical specifications of the G300K are aligned with the operational demands of high-throughput advanced packaging lines. The KrF-based excimer laser delivers short-wavelength UV pulses that ablate material with micron-level accuracy without causing thermal distortion or substrate warping. This cold ablation effect is particularly important in organic substrate processing, where thermal stress can lead to delamination or dielectric cracking.

According to Gigaphoton, the G300K features high repetition rates and long-life modules that reduce maintenance cycles and lower total cost of ownership for fabs operating around the clock. Its ability to consistently deliver high-powered pulses with uniform beam quality makes it suitable for mass production of high-density chiplet interconnects.

The excimer laser system is also designed for modular integration, making it compatible with existing packaging equipment lines. This versatility is crucial in an industry where packaging designs continue to evolve rapidly, especially in the AI sector where custom interposer designs and die stacking approaches vary across vendors.

How is the installation expected to influence SEMICON Japan 2025?

Gigaphoton’s integration of the G300K into ORC MANUFACTURING CO., LTD.’s processing equipment comes ahead of SEMICON Japan 2025, where the system will be publicly demonstrated. The exhibition, scheduled to begin on December 17 in Tokyo, is expected to attract global interest in AI packaging workflows and emerging tools that support chiplet-based integration.

The G300K is likely to be a centerpiece of Gigaphoton’s showcase, especially as visitors look for scalable solutions for 2.5D interposers, through-silicon vias, and fan-out wafer-level packaging. Given Japan’s renewed focus on semiconductor sovereignty and equipment self-reliance, the presence of a domestically developed excimer laser system targeting one of the most critical bottlenecks in AI packaging is likely to draw attention from both domestic and international participants.

Industry watchers expect Gigaphoton to use the event to build momentum for the G300K in overseas markets as well, particularly in Taiwan, South Korea, and the United States, where high-volume backend packaging capacity is being rapidly expanded to meet AI demand.

What does this reveal about Gigaphoton’s long-term strategy?

Tatsuo Enami, President and Chief Executive Officer of Gigaphoton, stated that alongside its core work in lithography lightsources, the company continues to pursue new applications for excimer lasers across other industrial domains. He reaffirmed that Gigaphoton is committed to accelerating research and development to support new use cases, with advanced semiconductor packaging being a clear area of focus.

Enami emphasized that Gigaphoton sees itself as a critical enabler of process innovation across the semiconductor industry. The company’s decision to channel its R&D into advanced packaging aligns with long-term trends in the semiconductor roadmap, where performance gains are increasingly driven by integration density and interconnect efficiency rather than by traditional Moore’s Law scaling.

By entering backend laser processing workflows, Gigaphoton is no longer just a lithography supplier. It is now directly contributing to the production steps that define performance ceilings in AI chips, high-bandwidth memory stacks, and heterogeneous compute modules. This marks a strategic evolution in how the company positions itself within the global semiconductor supply chain.

How does this fit into Japan’s domestic AI hardware ambitions?

The deployment also adds a new dimension to Japan’s broader ambition of building out its domestic semiconductor infrastructure. Recent government initiatives, including support for Rapidus and subsidies for backend R&D centers, highlight Tokyo’s strategic bet on high-value process steps in the chip lifecycle. Tools like the G300K, which enable precise interconnect formation in multi-die packages, are now seen as part of Japan’s competitive arsenal in the AI hardware space.

With demand for AI inference and training chips continuing to surge, and global supply chains for packaging and substrates under pressure, Japanese policymakers and industry stakeholders are prioritizing self-reliant, high-precision tools that can serve both domestic and export markets. Gigaphoton’s G300K fits squarely within this framework, providing a critical building block for chiplet-based processor production that supports Japan’s positioning as a value-added player in the AI race.

The successful integration of the laser system into a local research environment also strengthens collaborative frameworks between equipment vendors and domestic labs, which are essential for de-risking new technology adoption in commercial fabs.

What are the key takeaways from Gigaphoton’s G300K laser installation for AI chiplet packaging?

• Gigaphoton Inc. has successfully installed its G300K excimer laser system at a Japanese advanced semiconductor R&D company, marking its entry into the AI-focused advanced packaging segment.

• The G300K laser is designed for high-precision micro-via drilling and trench patterning, which are critical for manufacturing 2.5D and 3D semiconductor packages used in chiplet-based AI processors.

• Built on krypton fluoride (KrF) technology at a 248 nm wavelength, the system offers high power, high repetition rate, and long-life modules, optimized for industrial backend workflows.

• The laser has been integrated into substrate processing equipment made by ORC MANUFACTURING CO., LTD. and will be showcased at SEMICON Japan 2025 beginning December 17.

• This move signals Gigaphoton’s strategic pivot beyond front-end lithography into backend semiconductor processes, aligning with growing demand for chiplet-based AI compute platforms.

• The G300K system supports sub-10μm via formation, helping to meet the packaging density, thermal efficiency, and interconnect demands of next-generation AI hardware.

• Japanese equipment vendors, including Gigaphoton, are increasingly focusing on backend tooling as part of Japan’s broader semiconductor sovereignty and AI infrastructure goals.

• Company leadership, including President and CEO Tatsuo Enami, highlighted the importance of exploring broader excimer laser applications beyond lithography to remain competitive in evolving semiconductor markets.

• The installation adds momentum to Japan’s domestic semiconductor manufacturing strategy, particularly in areas such as substrate integration, laser drilling, and high-density interposer fabrication.

• Industry observers see this as a potential springboard for Gigaphoton to expand G300K deployments globally, particularly in Taiwan, South Korea, and the United States where AI packaging capacity is scaling rapidly.