EUV之外的碎屑：軟X射線和光刻的未來

新的研究探索了用於芯片製造的軟X射線，有可能將光刻的分辨率推向5nm及以下。 “超越歐洲”是下一件大事嗎？

The relentless pursuit of smaller, faster, and more efficient chips is pushing the boundaries of lithography. The latest buzz? Soft X-rays, offering a potential leap 'beyond-EUV' lithography. Here's the lowdown.

對較小，更快，更高效的芯片的無情追求正在推動光刻的邊界。最新的嗡嗡聲？柔軟的X射線，提供潛在的飛躍“超越euv”光刻。這是低點。

The Promise of Soft X-rays in Chipmaking

芯片製作中軟X射線的承諾

Researchers at Johns Hopkins University are shaking things up with a new approach to chipmaking using lasers with wavelengths in the 6.5nm ~ 6.7nm range – we're talking Soft X-rays. This could potentially crank up the resolution of lithography tools to a mind-blowing 5nm and below. The scientists are calling it 'beyond-EUV' (B-EUV), hinting that it might just replace the industry-standard EUV lithography. But hold your horses, they admit that building even an experimental B-EUV tool is still years away.

約翰·霍普金斯大學（Johns Hopkins University）的研究人員正在使用一種新的方法，使用具有波長的激光器在6.5nm 〜6.7nm範圍內的新方法來製作碎屑 - 我們正在談論軟X射線。這可能會使光刻工具的分辨率提高到令人震驚的5nm及以下。科學家稱其為“超越euv”（B-euv），暗示它可能只是取代行業標準的EUV光刻。但是握住您的馬，他們承認，即使是一個實驗性的B-EUV工具，也有多年的時間。

Why Soft X-rays?

為什麼要軟X射線？

Today's most advanced chips rely on EUV lithography, which uses a 13.5 nm wavelength. While EUV can produce some impressively small features, pushing the limits requires increasingly complex and expensive systems. Soft X-rays offer a potential shortcut. By using a shorter wavelength, even lenses with moderate numerical aperture (NA) could achieve a resolution boost.

當今最先進的芯片依賴於使用13.5 nm波長的EUV光刻。雖然EUV可以產生一些令人印象深刻的小功能，但推動極限需要越來越複雜且昂貴的系統。軟X射線可提供潛在的快捷方式。通過使用較短的波長，即使具有中等數值孔徑（NA）的鏡頭也可以實現分辨率提升。

The Challenges Ahead

未來的挑戰

It's not all smooth sailing. B-EUV faces some serious hurdles:

這並不是所有的航行順利。 B-euv面臨一些嚴重的障礙：

• Light Source: Creating a stable and powerful source of 6.7 nm wavelength radiation is a challenge.
• Photoresists: These shorter wavelengths don't play nice with traditional photoresist materials.
• Mirrors: Because pretty much everything absorbs these wavelengths instead of reflecting them, crafting suitable mirrors is a major task.
• Ecosystem: There is no ecosystem to support the designs with components and consumables.

In short, building a B-EUV machine requires breakthroughs across the board – light sources, mirrors, resists, and even consumables.

簡而言之，建造B-EUV機器需要全面突破 - 光源，鏡子，抵抗甚至消耗品。

A Step Forward: New Materials for Soft X-ray Lithography

向前：軟X射線光刻的新材料

Despite these challenges, progress is being made. The Johns Hopkins team, led by Professor Michael Tsapatsis, has been exploring how certain metals can improve the interaction between B-EUV light and resist materials. They discovered that metals like zinc can absorb B-EUV light and emit electrons, triggering chemical reactions in organic compounds that allow for etching extremely fine patterns onto silicon wafers. To apply these metal–organic compounds to silicon wafers, the researchers developed a technique called chemical liquid deposition (CLD).

儘管有這些挑戰，但仍在取得進展。由Michael Tsapatsis教授領導的Johns Hopkins團隊一直在探索某些金屬如何改善B-EUV光和抵抗材料之間的相互作用。他們發現，像鋅這樣的金屬可以吸收B-euv光並發出電子，從而在有機化合物中觸發化學反應，從而可以將極其細的圖案蝕刻到矽晶片上。為了將這些金屬和有機化合物應用於矽晶片，研究人員開發了一種稱為化學液體沉積（CLD）的技術。

Looking Ahead

展望未來

While B-EUV technology is still in its early stages, this research highlights the potential of soft X-rays in chipmaking. The CLD process developed by the Johns Hopkins team could also find applications beyond semiconductors. There's no clear path to mass market yet, but they've made a significant step in finding resist materials that can work with 6nm wavelength light.

儘管B-EUV技術仍處於早期階段，但這項研究突出了芯片製造中軟X射線的潛力。約翰·霍普金斯（Johns Hopkins）團隊開發的CLD流程還可以在半導體之外找到應用程序。目前還沒有明確的大眾市場途徑，但是他們在尋找可以與6NM波長光線的抗材料一起邁出了重要一步。

So, will soft X-rays revolutionize chipmaking? Only time will tell. But one thing's for sure: the quest for smaller, faster chips is driving some seriously cool science. It will be interesting to see where this technology goes. Keep your eyes on this space—the future of chipmaking might just be written in soft X-rays!

那麼，軟X射線會革新芯片製造嗎？只有時間會證明。但是可以肯定的是：對較小，更快的籌碼的追求正在推動一些非常酷的科學。看到這項技術的去向會很有趣。請注意這個空間 - 碎屑的未來可能只是用柔軟的X射線寫成！