South Korea's KRISS Develops Independent Testing for Semiconductor-Grade Gases

A single speck of moisture in a vial of semiconductor gas can destroy a chip. Not immediately—months later, after the gas has been used in hundreds of manufacturing steps, after the wafer has been processed and packaged and shipped. By then, the defect is nearly impossible to trace back to its source. This is the problem that has haunted South Korea's semiconductor industry as it tries to build domestic alternatives to imported materials and reduce dependence on unstable global supply chains.

For years, manufacturers had no choice but to trust the certificates of analysis that came with each shipment from established suppliers. These documents promised purity levels of 99.9999%—six nines, in industry parlance—but there was no independent way to verify the claim. When Japanese export restrictions tightened in 2019 and global supply chains began to fracture, South Korean companies started asking whether they could source these critical gases domestically or from new suppliers. The answer was always the same: maybe, but only if someone could prove the quality was real.

The Korea Research Institute of Standards and Science, led by President Dr. Lee Ho Seong, has now built that proof. Since 2020, when it launched testing services for hydrogen fluoride, KRISS has systematically expanded its capabilities to cover 15 high-purity gases used across semiconductor etching, cleaning, and deposition processes. The institute has developed standardized testing procedures for each gas and created six certified reference materials—chemical standards with precisely known values—that allow manufacturers to verify whether their own measurement equipment is working correctly. The result is an independent testing infrastructure that can objectively evaluate whether a new supplier's product is actually as pure as claimed.

Building this capability required more than scientific expertise. KRISS had to construct specialized facilities to handle gases that are simultaneously toxic, corrosive, and explosive. The laboratories include custom piping systems, safety cabinets with leak detection, exhaust treatment equipment, and air-conditioning systems designed to manage hazardous materials safely. A separate cleanroom was built for analyzing metallic impurities at the trace levels that matter in semiconductor manufacturing. The precision required is extraordinary: detecting and measuring the 0.0001% of contaminants in a gas that is 99.9999% pure demands measurement capabilities that KRISS has spent decades developing and validating against international standards.

The demand has been immediate and concentrated. Hydrogen fluoride, a material that South Korea is actively trying to produce domestically, has driven most of the 34 testing services KRISS has completed so far. Manufacturers use these test results in multiple ways: to validate their own in-house analysis methods, to improve their purification processes, and to compare the quality of domestic products against imported alternatives. For semiconductor makers considering whether to switch suppliers or test a new material in their production lines, KRISS's independent verification provides the objective data they need to justify the risk.

Dr. Oh Sang Hyub, a principal research scientist in KRISS's Gas Metrology Group, framed the stakes plainly: without reliable, objective proof of quality, localization of semiconductor materials remains theoretical. The work matters because it bridges the gap between what a supplier claims and what a manufacturer can actually trust.

The infrastructure KRISS has built is not meant to remain confined to a government laboratory. The institute is partnering with the FITI Testing & Research Institute to establish a Semiconductor Gas Quality and Safety Evaluation Support Center, with a target completion date of 2030. Once operational, this private testing organization will make these services accessible to companies across the industry, removing the bottleneck of having to work through a government institute. The transition from public research to commercial service will be gradual—KRISS is providing technical guidance on facility design, equipment selection, and testing procedures—but the direction is clear. Within four years, semiconductor manufacturers should be able to walk into a specialized testing center and get independent verification of any gas they're considering for their supply chain.