Conflict Minerals in the Semiconductor supply chain. Which companies in the upstream, foundry and downstream are most exposed to the issue of conflict materials? Upstream: Mediatek, Silergy, ASML, ASM International, Shin-Etsu, Hoya, Applied Materials, Tokyo Electron. Foundry: Infineon, TSMC, SMIC, Intel, Micron, GlobalFoundries, Samsung Electronics, Texas Instruments, Hynix. Downstream: Apple, Oppo, Xiaomi, Huawei, Pegatron, Hon Hai, Microsoft, Vestas.