**Introduction** The Association of Southeast Asian Nations (ASEAN)’s role in the global semiconductor industry has evolved from a predominantly assembly-and-test base into a more differentiated set of semiconductor nodes embedded in global value chains. Singapore is positioned as a highly connected hub with fabrication- and equipment-related capabilities; Malaysia and the Philippines remain central to assembly, testing, and packaging; and Vietnam and Thailand have expanded participation as production footprints diversify[1][2][3]. **Contextual Background** Semiconductor production spans design, wafer fabrication, and assembly, testing, and packaging. Fabrication — especially at advanced nodes — remains geographically concentrated, while backend activities are more dispersed. Mapping of the semiconductor value chain highlights deep cross-border interdependence and the vulnerability created by geographic clustering in critical stages and inputs[1]. Economic security considerations have become more prominent in how semiconductor supply chains are organized, increasing the value of diversification and secondary manufacturing hubs beyond the most concentrated fabrication centers[2]. **ASEAN’s position in global semiconductor value chains** **1.** **Assembly and testing anchor ASEAN’s semiconductor value-chain position** ASEAN’s integration into global semiconductor production began with assembly, testing, and packaging activities within export-oriented electronics clusters. Malaysia —particularly the Penang cluster — remains one of the world’s leading outsourced semiconductor assembly and test locations, while the Philippines continues to play a significant role in backend manufacturing[3]. Distributing assembly and testing activities across multiple ASEAN economies reduces concentration risk in the semiconductor value chain and lowers dependence on any single economy for critical assembly and testing capacity[1][3]. **2.** **Singapore’s role has shifted toward higher-value semiconductor activities** Singapore’s role extends beyond assembly and testing to include wafer fabrication — primarily at mature and specialty nodes — along with precision engineering and semiconductor equipment manufacturing. These activities are supported by developed infrastructure, efficient logistics systems, and deep integration into global semiconductor trade[1][3]. Within ASEAN’s semiconductor trade network, Singapore occupies a central position due to its function as a manufacturing, export, and re-export hub. Its centrality reflects the scale of semiconductor trade flows and its role in linking regional production sites with global markets[4]. **3.** **Growing semiconductor participation in Vietnam and Thailand** Supply chain diversification has increased electronics and semiconductor-related production across additional ASEAN economies. Asia accounted for nearly 80% of global information and communications technology goods exports in 2024, underscoring the region’s central role in electronics manufacturing and trade[5]. Within ASEAN, inward foreign direct investment reached US$230 billion in 2023, reflecting redirected investment flows and expanded manufacturing capacity[6]. Vietnam has emerged as a major recipient of electronics manufacturing investment, strengthening its integration into semiconductor supply chains. Thailand’s established automotive electronics sector reinforces its link to semiconductor demand and component production[6]. **Conclusion** ASEAN’s semiconductor role has evolved from a concentration in assembly and testing toward a more diversified regional production structure with distinct specializations: (i) large-scale backend manufacturing in Malaysia and the Philippines, (ii) fabrication, equipment production, and trade hub functions centered in Singapore, and (iii) expanded electronics and semiconductor manufacturing capacity in Vietnam and Thailand. The region’s strategic importance lies less in leading-edge chip fabrication and more in reinforcing supply chain resilience through the geographic distribution of assembly, testing, packaging, and selected fabrication activities across multiple economies.
