Rumor
TSMC A16 node restricted to liquid-cooled HPC applications due to backside power delivery thermal issues
Sunday, February 1, 2026 at 03:57 AM
TSMC A16 node is reportedly exclusive to high-performance computing due to thermal challenges inherent in backside power delivery (BSPD) which necessitates liquid cooling. While Intel has committed to BSPDN across its 14A node, technical complexities and resource requirements make it unsuitable for mobile SoCs like Apple's iPhone chips, which are unlikely to utilize Intel's 14A process.
Context
TSMC has restricted its upcoming A16 process node, slated for mass production in 2026, exclusively to high-performance computing (HPC) applications. This limitation is driven by thermal challenges inherent in Backside Power Delivery (BSPDN). The specific manufacturing steps required to implement BSPDN significantly degrade heat dissipation, making liquid cooling a mandatory requirement for stable operation. Consequently, the node is currently unfeasible for the tight thermal envelopes of mobile smartphones.
This technical hurdle creates a clear divide in the foundry race. While Intel is pursuing an aggressive "all-in" strategy with BSPDN on its 14A node, TSMC and Samsung are maintaining flexibility by offering nodes both with and without the technology. Because BSPDN adds immense design complexity for minimal gains in low-power chips, industry insiders suggest there is zero chance Apple will utilize Intel 14A or A16 for upcoming iPhones, favoring nodes better optimized for mobile thermal management.
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