Co-Packaged Optics Testing Faces Steep Data Center Ramp

As data center demand surges for high-performance, low-power solutions, Co-Packaged Optics (CPO) has emerged as a key technology in the semiconductor industry. However, scaling CPO presents significan... Read original →

The CPO testing bottleneck is forcing a full-stack reconfiguration across semiconductor manufacturing: upstream EUV and 3nm processes must accommodate the thermo-mechanical sensitivity of silicon photonics, while downstream 2.5D/3D packaging yields hinge on fiber alignment tolerances. TSMC in Taiwan, China leads in CoWoS integration but lacks standardized optical I/O test interfaces, shifting custom ATE costs onto clients like NVIDIA. U.S. export controls now cover advanced photonic testers, raising compliance overhead for OSATs like Amkor. As Teradyne and Advantest lock down hybrid electro-optical ATE IP, startups such as Lightmatter pivot to open architectures to avoid ecosystem capture. Over the next 18 months, industry coalitions will battle to standardize STDF/CSV data formats—control over test data infrastructure equals control over CPO volume ramp. Platforms like yieldWerx that unify DUT-to-OSA analytics could enable >50M-unit annual production; without them, CPO remains trapped in the lab-to-fab performance gap.