Demand for AXT Substrates Grows for Robotics Applications
Research firm QF Research noted that substrate manufacturer AXT Inc. ($AXTI) is seeing increased demand for its Gallium Arsenide (GaAs) VCSEL substrates. The demand is driven by Chinese autonomous vehicles and what the firm calls 'emerging robotics applications' that require increased precision and dexterity for robotic hands.
- The global Gallium Arsenide (GaAs) wafer market was valued at $1.14 billion in 2024 and is forecast to grow to $3.51 billion by 2034. This growth is largely driven by the expansion of 5G infrastructure and optoelectronics. - VCSELs (Vertical-Cavity Surface-Emitting Lasers) are critical for 3D sensing and LiDAR systems. Unlike traditional edge-emitting lasers, their perpendicular light emission allows them to be easily manufactured into 2D arrays, which is ideal for these applications. - The demand from China's autonomous vehicle market is significant, with projections showing growth from $22.84 billion in 2025 to $218.95 billion by 2034. - Dexterous robotic hands require advanced sensors to provide tactile feedback and precise control, mimicking the complexity of a human hand which has over 30 muscles. VCSEL-based sensors are a key enabling technology for this fine-motor-skill replication. - AXT's proprietary Vertical Gradient Freeze (VGF) crystal growth process is a key technical advantage, producing high-purity substrates with low defect densities, which is critical for reliable device performance. - The company is part of an industry-wide transition to larger wafer sizes to improve manufacturing yields and cost-efficiency. AXT has successfully developed and shipped 8-inch GaAs substrates, a significant technical achievement. - Key competitors for AXT in the compound semiconductor substrate market include companies like Sumitomo Electric Industries, Coherent (formerly II-VI), and IQE plc. - Beyond robotics and automotive, GaAs substrates are fundamental components in RF amplifiers for Wi-Fi and mobile phones, satellite communications, and micro-LED displays.
