As a key basic material running through core processes such as wafer diffusion, etching, deposition and ion implantation, high-purity alumina ceramic tubes (Al₂O₃) feature four core superior properties including ultra-high purity, high temperature resistance, excellent insulation and corrosion resistance, witnessing surging market demand amid the localization drive of the semiconductor and electronic industries.
1. Superior performance targets core pain points of semiconductor processes.
The high-temperature, highly corrosive, ultra-clean and high-insulation working environments in semiconductor manufacturing impose extremely stringent requirements on materials, and high-purity alumina ceramic tubes perfectly meet these core demands.
Ultra-high purity to eliminate micro-pollution
Semiconductor-grade alumina ceramic tubes generally reach a purity of 99.5%~99.99%, with low content of metallic impurities such as Na, Fe and K, and no free SiO₂ precipitation, effectively avoiding ionic pollution from the source.
High temperature and thermal shock resistance, suitable for extreme working conditions
It has a melting point of up to 2050℃, can be used stably for a long time at 1600℃, and withstands extreme high temperature of 1800℃ in short term. With low thermal expansion coefficient, it will not crack or deform under sudden temperature change of 800℃, perfectly matching high-temperature processes such as diffusion, annealing and deposition.
Ultimate insulation & high-frequency stability to ensure circuit safety
Its volume resistivity reaches 10¹⁴-10¹⁶Ω·cm at room temperature, with insulation performance remaining stable even under high temperatures. It can isolate high-voltage electrodes and prevent current leakage. Featuring a stable dielectric constant of 9.1-10.3 and extremely low dielectric loss, it fits high-frequency and microwave applications effectively, avoiding electromagnetic interference that affects chip precision.
High hardness & wear resistance plus strong corrosion resistance for long service life
With Mohs hardness of grade 9, second only to diamond, it delivers outstanding wear resistance and produces no dust during production processes. It resists corrosion from 98% concentrated sulfuric acid, 40% hydrofluoric acid as well as fluorine and chlorine-based plasma. Its service life is over 8 times longer than stainless steel pipes, greatly cutting equipment maintenance costs.
2. Full-process application covering core scenarios of semiconductor and electronics industries
Wafer manufacturing and high-temperature processes: Used as reaction tubes, protection tubes and furnace tubes for diffusion furnaces and annealing furnaces
Etching and ion implantation processes: applied as nozzles, inner lining tubes and focus rings in etching machines
Electronic and optical communication applications: served as insulating support tubes and vacuum interrupter envelopes in high-voltage electronic equipment
3. Industry Trends: High Purity, High Precision and Customization
Continuous purity upgrading: evolving from 99.5% to ultra-high purity of 99.99%, achieving near-zero impurity precipitation to adapt to 2nm and advanced manufacturing processes.
Extreme precision improvement: It achieves a surface roughness of Ra0.02μm (medical-grade polishing) with dimensional tolerances controlled at the micron level, meeting the requirements for vacuum sealing and precision assembly.
Popularization of customized solutions: Special structures such as double-hole, thin-walled and bottom-sealed types can be customized for different processes including etching, deposition and ion implantation to adapt to diverse working conditions.
