AI fuels OSAT pricing power as chip packaging orders fill through 2027

The non-cyclical surge in AI compute demand is decoupling OSAT from traditional semiconductor seasonality. Technically, advanced packaging (e.g., CoWoS, FOPLP) has become a system-level bottleneck, forcing fabless firms to lock capacity two years ahead and accelerating localization of equipment and materials. On compliance, U.S. export controls now targeting back-end tools—combined with seismic risks in Taiwan, China—are compelling global clients to adopt dual-track OSAT strategies, inflating operational costs by 15–20%. In market dynamics, ASE’s post-SPIL scale advantage is being countered by JCET and TFME through Chiplet ecosystem partnerships, while Amkor expands aggressively in Southeast Asia. Over the next 18 months, packaging will shift from a manufacturing afterthought to the critical determinant of chip delivery timelines—orders extending into 2027 reflect industry-wide panic buying for supply certainty.