Thailand's Board of Investment projects a major FDI wave over the next 3–5 years, driven by AI, semiconductors, smart vehicles, and smart electronics. Two global tech giants are actively expanding: Infineon is building a new backend factory with advanced automation (targeting 2x its current largest hub), while Lumentum has grown from hundreds to 9,000 Thai workers and is scaling to 10,000, producing photonics for AI and data-center infrastructure. Key gaps remain in skilled workforce development, supply-chain integration, regulatory modernization, and power-grid stability—critical for SMEs seeking to participate in these high-value supply chains.