We went to this year’s materials forum at National Cheng Kung University in Taiwan, and here are some takeaways: Changing one material in an AI chip package can force another supplier to rework a design and rerun tests. Several speakers told us that packaging specs are changing so quickly that suppliers need to share design data earlier to leave enough time for testing. Yang Wei Wen, president of IV Technologies, a Taiwanese maker of CMP pads, gave us an example. New packaging materials change what it takes to polish a surface flat. His team already develops processes with customers, and he wants equipment makers involved from the start. Co-packaged optics shows why the timing matters. Companies are still exploring several ways to integrate optics into a chip package. Which design they choose changes what their partners need to test. We will release interview videos with some suppliers, so stay tuned.