Tower Semiconductor's stronger-than-expected capacity expansion lets it fill more optical-chip orders itself, reducing customers' incentive to move to foundries they regard as technologically weaker. Its hybrid bonding packs dense connections between photonic chips and their driver electronics, an advantage viewed as effectively unmatched among Western suppliers. Tower remains one of the highest-conviction holdings despite the portfolio trim. x.com 

Tower Semiconductor is becoming to photonics what TSMC is to GPUs: a foundry building the next AI stack. It fabricates silicon photonics chips that combine lasers, modulators and detectors on one platform, and is integrating Lightwave Logic into that platform right after massive AI optical spending. As AI networks scale to 800G and 1.6T, photonics becomes the next bottleneck, with limited supply and exploding demand. x.com 

Tower Semiconductor is a short because the market cannot digest competition. It sits on a short list alongside rates, TSMC, Vertiv, ASML and Broadcom; GlobalFoundries is not counted as that competition. x.com  x.com 

Tower Semiconductor is the only foundry besides TSMC with production-ready silicon photonics at scale. Every 1.6T optical module going into AI data centers needs Tower's wafers, and 70% of its capacity through 2028 is already secured. x.com 

Tower Semiconductor is building the foundry that silicon photonics needs, alongside its power management business, and its chart is flashing a blue buy signal again. x.com 

Tower Semiconductor probably has little upside left, trading at 43x the $500M net profit it projects once its foundry buildout is complete and running at 85% utilization. By contrast, TSMC trades at 24x 2026 earnings. x.com 

Tower Semiconductor's 2028 guidance makes its shares attractively valued around $180 despite competition from Silith, GlobalFoundries, STMicroelectronics and others. The stock previously felt too rich to add to. x.com  x.com 

Rising 1.6T switching demand favors optical suppliers, though their execution risks vary. Bank of America says the market could grow ~101% annually through 2030. Marvell's leading DSPs and Lumentum's supply-short 200G EML lasers are lowest risk; Applied Optoelectronics' capacity expansion and Fabrinet's customer concentration make them medium risk. Aeluma remains pre-commercial, while Lightwave Logic's polymer modulators are a high-risk moonshot despite its TSM partnership. x.com 

Tower Semiconductor's good news looks mostly priced in at a $27 billion market cap, with upside hinging on capacity timing. A reported BofA Buy call with a $367 target rests on Tower's silicon photonics lead, and the numbers have substance: SiPho's run rate rose from $180 million to $680 million in a year, backed by a $1.3 billion 2027 contract. But its Arai, Japan fab reaches full production only in Q4 2027, a delay would push back the 2028 model, and $367 assumes those targets are hit on time. … Show more

Tower Semiconductor's demand should climb as co-packaged optics gains strength, building on a report that Marvell has landed 5 million Tower PIC shipments for AI data-center optics. x.com