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klxnews > Blog > Technology > China’s Breakthrough: Producing 5nm Chips Without Extreme Ultraviolet (EUV) Using SAQP Technology
Technology

China’s Breakthrough: Producing 5nm Chips Without Extreme Ultraviolet (EUV) Using SAQP Technology

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China has recently made headlines in the semiconductor industry by successfully manufacturing 5-nanometer (nm) chips without relying on the highly advanced Extreme Ultraviolet (EUV) lithography machines. Instead, they utilized a complex and sophisticated technique called Self-Aligned Quadruple Patterning (SAQP). This achievement marks a significant milestone in chip manufacturing, showcasing China’s growing capabilities in semiconductor technology despite global supply chain challenges and restrictions.

Contents
What is the Significance of 5nm Chip Technology?What is SAQP (Self-Aligned Quadruple Patterning)?How SAQP Works:Why is SAQP Considered “Super Complicated”?Conclusion: A New Chapter in Semiconductor Manufacturing

What is the Significance of 5nm Chip Technology?

The 5nm process node represents one of the most advanced semiconductor manufacturing technologies available today. Chips produced at this scale offer:

  • Higher performance:Faster processing speeds and improved efficiency.
  • Lower power consumption:Essential for mobile devices and energy-efficient computing.
  • Increased transistor density:More transistors packed into a smaller area, enabling more powerful and compact chips.

Traditionally, producing 5nm chips requires EUV lithography machines, which use extremely short wavelengths of light to etch intricate patterns on silicon wafers. These machines are expensive, complex, and currently dominated by a few global suppliers, making access difficult for some countries.

What is SAQP (Self-Aligned Quadruple Patterning)?

SAQP is an advanced lithography technique that allows chipmakers to create extremely fine patterns on silicon wafers without using EUV technology. It involves multiple patterning steps to achieve the desired resolution.

How SAQP Works:

  1. Initial Patterning:A base pattern is created using conventional lithography.
  2. Spacer Deposition:A thin layer of material (spacer) is deposited around the initial pattern.
  3. Spacer Etching:The spacer is etched to leave only the sidewalls, effectively doubling the pattern density.
  4. Repeating the Process:This spacer deposition and etching cycle is repeated multiple times (quadruple patterning means four times) to further increase the pattern density.

This process allows manufacturers to achieve feature sizes comparable to EUV lithography but requires extremely precise control and multiple complex steps.

Why is SAQP Considered “Super Complicated”?

SAQP is technically demanding for several reasons:

  • Multiple Process Steps:Each patterning cycle involves deposition, etching, and cleaning, increasing the risk of defects.
  • Precision Required:Any slight misalignment or error can cause pattern distortion, affecting chip performance.
  • Increased Manufacturing Time and Cost:More steps mean longer production times and higher costs.
  • Equipment and Material Challenges:Requires specialized equipment and materials that can withstand repeated processing.

Despite these challenges, SAQP offers a viable alternative for countries or companies that cannot access EUV machines due to export restrictions or cost barriers.

Conclusion: A New Chapter in Semiconductor Manufacturing

China’s ability to produce 5nm chips without EUV lithography using the SAQP technique is a remarkable technological feat. It highlights the country’s commitment to advancing its semiconductor industry despite global challenges. While SAQP is complex and resource-intensive, it offers a strategic alternative that could reshape the competitive landscape of chip manufacturing.

 

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