YC Chem Powers Korea’s Next Semiconductor Material Leap

By Daniel de Bomford

Every breakthrough chip begins long before a circuit is drawn or a wafer is patterned. It begins with the subtle work of chemistry: rinses that leave no trace, resists that withstand impossible geometries and formulations tuned to conditions that only a handful of fabs in the world can replicate. YC Chem operates in this domain where possibility is beholden to precision.

As Korea’s semiconductor strategy broadens from memory leadership to global competitiveness across the full semiconductor spectrum, it enters a new chapter. YC Chem is emerging as one of the few materials innovators able to customize at speed, innovate without compromise and deliver materials ready for the most demanding process lines on earth.

At this pivotal transition, YC Chem serves as a high-performance innovator, whose chemistries underpin advanced packaging, High Bandwidth Memory (HBM) and next-generation lithography. In a market where speed and precision are paramount, the company stands out through its agility, tailored formulations and proven technical expertise.

Seunghun Lee, President, YC Chem

Dr. Seunghun Lee, president of YC Chem, says the industry is at an inflection point as Korea seeks competitiveness in non-memory. “Korea is a recognized leader in memory, but globally about 70 percent of the semiconductor market is non-memory and 30 percent is memory,” he says.  The company already supplies major domestic memory makers, and it's expanding its scope to non-memory, global customers.

Its strength is fully realized in its ability to work closely with its customers, tuning its formulations to their specific requirements. “The challenge isn’t whether we can formulate a product; it’s gaining consistent access to leading-edge process lines where we can tune to a customer’s exact use conditions,” Lee says.

This contrasts with the giants it competes with, who prioritize high-volume platforms. Many of YC Chem’s products originated as customer-specific specifications that have been iterated and improved. “That ‘tailor-then-scale’ approach is where a focused, mid-sized specialist like us can outperform,” Lee says.

Innovation has long been one of YC Chem’s defining traits. Well before its breakthrough EUV rinse, the company has already established itself as a pioneer in ArF and KrF photo-process rinses, securing over 20 domestic and international patents.

Over the past 25 years, the company has grown in step with the semiconductor industry itself, developing a deep intuition for where technologies are headed and how best to support customers as their requirements evolve. That foresight has guided the company’s expansions beyond lithography, into CMP, glass packaging and key backend processes. By strategically reallocating R&D resources, YC Chem has been able to enter new fields with confidence and respond quickly to the increasingly complex demands of advanced semiconductor manufacturing.

For decades, American, European and Japanese materials giants have held an advantage built on deep process integration inside the world’s leading fabs. YC Chem recognizes that legacy, but has shown it can close the gap rapidly when granted access to advanced production lines. The company’s in-house “mini-fab” has become a powerful trust-builder with tier 1 customers and is capable of replicating full lithography and etch sequences from coating and baking to exposure, cleaning and defect inspection.

“Performance is necessary but not sufficient,” Lee says. “Quality systems are decisive. Our manufacturing is entirely inside cleanrooms with environmental controls comparable to device fabs.” As a result, the company manages metallic impurities to sub-parts-per-trillion levels. “When auditors visit, they don’t just see a lab; they see a mini-line capable of reproducing key steps and of diagnosing issues quickly,” Lee says.

YC Chem’s recent momentum has been driven by strong demand for its photoresist and SoC-oriented materials, which continue to expand across both domestic and global programs. To stay ahead of customer expectations, the company is investing heavily in metrology tools such as ICP-MS, additional track equipment and enhanced process-replica capacity. Strategic pushes into CMP slurries, wet chemicals and glass-substrate materials position YC Chem squarely in the high-growth segments AI and HBM.

As the semiconductor landscape accelerates toward ever more advanced nodes, YC Chem aims to solidify its role as a globally trusted materials partner. Its blend of precision customization, uncompromising quality and sustained innovation has already proven its value on critical production lines. As Lee says, “Our strategy is straightforward: earn access with agility and credibility, then compound that access through disciplined execution.”

4th Factory: Seongju Industrial Complex

To hear more from President Dr Seunghun Lee of YC Chem, check out this interview with him.