AXT raises $632.5M to double indium phosphide capacity for AI scale
AXT, Inc. raised $632.5 million to expand its indium phosphide (InP) manufacturing capacity, projecting a capacity increase by 2026 to address rising demand from hyperscale AI data centers. The company is focused on high-bandwidth optical interconnect solutions, positioning its infrastructure to support both tier-1 optical component manufacturers and major hyperscalers.
Key Takeaways
- New capital will fund expansion of crystal-growth furnaces and development of next-generation 6-inch InP wafers.
- Order backlog for indium phosphide has reached a record high exceeding $100 million.
- Integrated manufacturing model includes repurposing existing gallium arsenide facilities to accelerate capacity ramps.
- Consecutive doubling of output is planned for 2026 and 2027, with a dedicated new facility slated for the latter.
Why It Matters
The capacity surge reflects a critical supply-chain shift as AI clusters migrate from 'north-south' traffic to bandwidth-intensive 'east-west' GPU connectivity. By locking in substrate capacity, AXT aims to resolve the primary bottleneck for 1.6T transceivers used by hyperscalers. For the broader ecosystem, this signals a transition where specialized compound semiconductors like InP become foundational to the next wave of high-density streaming and compute infrastructure. Watch for the success of AXT’s 6-inch wafer qualification, which will be the litmus test for lower-cost, high-volume optical components in 2027.
Additional Context
The expansion follows a volatile period for AXT’s substrate business, which saw revenues recently rebound as Chinese export permits became more predictable. Per Semiconductor Today (May 2026), InP revenue reached 50% of total revenue in early 2026, up from less than 20% a year prior. This growth coincided with AI-driven fabric upgrades where 800G transceiver deployments transitioned from experimental to default status in hyperscale environments. The company’s move to double capacity twice by 2027 is a direct response to industry forecasts suggesting the optical substrate market could expand four to six times over the next three to five years. In July 2026, AXT disclosed a multi-year development and supply agreement with Coherent—a key tier-1 optical component peer—that included a $22.3 million prepayment to secure manufacturing capacity in Beijing through 2028. This deal underscores a broader competitive trend where module makers and hyperscalers are using prepayments to bypass potential supply crunches for critical lasers and photodetectors. Meanwhile, Nvidia and Lumentum have similarly deepened their integration, with Lumentum reporting a $2 billion strategic investment from Nvidia in March 2026 to fund its own U.S.-based optical manufacturing capacity. Regulatory strategy has also shifted; AXT recently withdrew its long-pending STAR Market IPO application for its Tongmei subsidiary in Shanghai, opting instead for a Hong Kong listing. Per Quiver Quantitative (July 2026), this shift allows the company to reframe its narrative around global AI infrastructure exposure rather than local Chinese equity markets. The company maintains that its vertically integrated supply chain, which includes refining high-purity indium through its Jingmei subsidiary, provides an edge in cost control as competitors face rising raw material expenses.
Read full article at tradingview.com
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