DNP Achieves Fine Pattern Resolution on EUV Lithography Photomasks for Beyond 2nm Generation

Commences sample supply of high-NA EUV photomasks for next-generation semiconductors

Dai Nippon Printing Co., Ltd. (DNP, TOKYO: 7912) has successfully achieved the fine pattern resolution required for photomasks for logic semiconductors of the beyond 2nm (nm: 10^-9 meter) generation¹ that support Extreme Ultra-Violet (EUV) lithography, a cutting-edge process in semiconductor manufacturing.

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Image of photomask for beyond 2nm generation EUV lithography (Photo: Business Wire)

DNP has also completed the criteria evaluation for photomasks compatible with High-Numerical Aperture², the application being considered for next-generation semiconductors beyond the 2nm generation, and has commenced the supply of evaluation photomasks. High-NA EUV lithography makes it possible to form fine patterns on silicon wafers with a higher resolution than previously possible, and is expected to lead to the realization of high-performance, low-power semiconductors.

[Development]

• To realize photomasks for beyond 2nm generation EUV lithography, requires patterns 20% smaller than those for the 3nm generation. This refers not only to the size and shape of the patterns, and technology required to resolve fine patterns of all types on the face of the same mask. This includes not only standard straight and rectangular patterns but also increasingly complex curved patterns. DNP has achieved the pattern resolution required for the beyond 2nm generation by making repeated improvements based on the established 3nm generation manufacturing process.
• Photomasks for high NA-EUV lithography require higher precision and finer processing than those for standard EUV lithography. DNP established and optimized a manufacturing process flow that differs from that for conventional EUV lithography photomasks.

[Going Forward]

DNP will continue to establish production technologies with the goal of commencing mass production of photomasks for 2nm generation logic semiconductors in FY 2027.

We will also continue to cooperate with imec to promote the development of photomask manufacturing technologies with an eye toward the 1nm generation.

1: Compliant with IRDS standards

2: Numerical Aperture (NA) is a number that indicates the brightness and resolution of an optical system. High-NA refers to the expansion of the lens NA of EUV exposure equipment from the conventional 0.33 to 0.55.

More Details

About DNP

DNP was established in 1876, and has become a leading global company that leverages print-based solutions to engineer fresh business opportunities while protecting the environment and creating a more vibrant world for all. We capitalize on core competencies in microfabrication and precision coating technology to provide products for the display, electronic device, and optical film markets. We have also developed new products, such as vapor chamber and reflect array that offer next-generation communication solutions for more people-friendly information society.

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