TSMC may lose pricing power as performance gains shift from shrinking transistors to stacking, interconnects and optics, while logic folding could make older processes competitive. Despite strong leading-edge demand, investors may overestimate the profit share its node leadership can retain. Its cautious expansion and past reluctance toward advanced packaging suggest a risk-averse culture that protects returns but could leave it late to disruptive technologies and key customers. x.com 

UMC is preferred to GlobalFoundries: its 12nm partnership with Intel targets US production in 2027, offering a way to win customers without building its own US fab. Longer term, logic folding could improve established-node chips without smaller transistors, though UMC has announced no such program and revenue could take years. Shares have recovered, making the entry less attractive; royalty terms are unclear. x.com 

UMC is a primary beneficiary as TSMC aggressively phases out mature nodes. Per a supply-chain report, TSMC's 28nm wafer starts fell from 200,000 a month early this year to 150,000 in June as it shifts capex to 2nm, A14 and advanced packaging. 28nm remains crucial for display drivers, power management, microcontrollers, networking and automotive chips, so customers will need second sources, and UMC's complete 28nm platform and advancing 22nm make it the main alternative. x.com 

Architecture changes could lift TSMC wafer demand. Shifting from 12-high to 8-high lifts volumes; an on-device AI phone upgrade cycle would be enormously bullish, while ASIC gains over Nvidia help because ASICs use more wafers. TSMC is arguably more vital to AI buildout than MAG stocks and a reasonable extended-AI-cycle play at a not-crazy multiple, barring big macro events. Margins may not expand as capex rises; a Terrafab partnership, if it happens, would somewhat ease Intel competition risk. … Show more

TSMC's conversion of 4nm/5nm capacity to 3nm to clear a backlog stretching to 2028 shows 3nm is the bottleneck, and TSMC controls the queue. Broadcom flagged the constraint publicly. The mix shifts toward 3nm premium pricing, with AI accelerator growth guided in the mid-to-high 50s% over five years, so every conversion is margin expansion disguised as logistics. TSMC is trading handset volume for HPC and AI margin, leaving Qualcomm, MediaTek and other non-Apple customers to absorb the squeeze. … Show more

UMC keeps delivering. Per a report shared by @dnystedt, its jointly developed 12nm FinFET process with Intel is set for mass production at Intel Arizona in 2027, and UMC sees a stronger second half of 2026 from price hikes on some processes and new orders, with broad price hikes likely in 2027 as materials costs rise. x.com 

TSMC is irreplaceable as the maker of the world's most advanced chips for Nvidia, Apple and AMD. x.com 

UMC's first high-volume silicon photonics shipment is the bottleneck-resolving traction expected from accessible foundries. TSMC's capacity discipline opens room for foundries advancing in specialty and optical technology, which is why UMC and GlobalFoundries are favored over TSMC. SILITH and UMC shipped the first mass-produced photonic IC wafers from UMC's Singapore 12-inch fab for a 1.6T platform, qualified by a leading cloud customer. UMC targets an open 12-inch platform in 2027. x.com 

Tower Semiconductor and UMC stand to benefit as 8-inch legacy foundry capacity tightens, another Macronix-style squeeze. Per @jukan05, UMC is raising 8-inch wafer prices 10-15%, with its Taipei and Xiamen fabs running at about 105-108% utilization, while 12-inch hikes are smaller at 5-10%. The same dynamic is playing out in E-glass. The bullish view on both foundries sits alongside a non-consensus bet on GlobalFoundries' photonics business, which won AMD's PIC order. x.com  x.com 

TSMC manufactures chips for most of the leading tech companies while Intel still struggles with its own foundry. It makes NVIDIA's GPUs, Apple's phone chips, AMD's processors and Google's TPUs, plus chips for Amazon, Microsoft and Meta. x.com  x.com