KLA Corp & TSMC
KLA Corporation is one of TSMC's most critical equipment suppliers, providing process control, wafer inspection, and metrology systems deployed at every technology node from 28nm down to TSMC's 2nm leading-edge process. KLA's yield management tools are installed in TSMC's fabs in Taiwan, Arizona, and Japan, with TSMC representing a substantial portion of KLA's annual equipment revenue as the world's largest pure-play foundry.
Why it matters: TSMC's aggressive technology roadmap including gate-all-around transistors, backside power delivery, and high-NA EUV transitions requires increasing inspection density per wafer, making KLA's revenue per wafer grow as nodes shrink. KLA's proprietary defect detection algorithms developed in co-engineering partnerships with TSMC create high switching costs that effectively lock in KLA's position for each technology generation.