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Semiconductor Quartz Flow Baffle
The Semixlab Semiconductor Quartz Flow Baffle is a precision-engineered component designed to regulate and homogenize gas flow inside CVD, LPCVD, PECVD, diffusion, and oxidation furnaces. Manufactured from ultra-high-purity fused quartz (SiO₂, ≥99.99%), it ensures stable temperature and gas distribution during wafer processing, effectively minimizing film non-uniformity, particle contamination, and local over-deposition. Its high optical transparency, exceptional thermal resistance, and contamination-free nature make it an indispensable component in advanced semiconductor and SiC/GaN epitaxy equipment.
Description
Ⅰ. Material and Surface Characteristics
● Material: High-purity fused silica (synthetic or natural quartz, purity ≥99.99%).
● Thermal Resistance: Stable performance at continuous temperatures up to 1200°C.
● Surface Finish: Ultra-smooth precision-polished surfaces to prevent particle adhesion.
● Thermal Expansion: Low coefficient of expansion (5.5×10⁻⁷/°C) ensures dimensional stability.
● Chemical Resistance: Inert to corrosive gases such as HCl, NH₃, and SiH₄.
Each flow baffle undergoes rigorous inspection for surface quality, dimensional accuracy, and internal bubble control, ensuring consistent purity and reliability in every production batch.
Ⅱ. Key Functions in Semiconductor Processes
The Quartz Flow Baffle serves as a core flow control and thermal regulation component inside high-temperature semiconductor processing chambers. Its function goes far beyond simply directing gases—it plays a multifunctional role in stabilizing the process environment, enhancing material utilization, and ensuring wafer-to-wafer uniformity.
1. Uniform Gas Flow Distribution
In processes such as LPCVD, PECVD, and epitaxy, uniform gas delivery is crucial to achieving consistent thin film growth and dopant distribution. The quartz flow baffle’s carefully engineered geometry — including its angled flow channels, deflecting curvature, and optimized spacing — ensures that reactive gases are evenly dispersed across the wafer surface. By maintaining a laminar flow pattern, the flow baffle ensures that each wafer within a batch experiences identical gas exposure conditions, thereby enhancing yield stability and device consistency.
2. Thermal Field Stabilization and Heat Transfer Balance
During high-temperature processes such as thermal oxidation or Si epitaxial growth, even minor variations in temperature distribution can result in crystal defects, dislocations, or film stress.
The quartz flow baffle functions as a thermal moderator:
● Smooths temperature gradients between the center and edge of the wafer boat
● Minimizes radiant heat imbalance within the furnace
● Reduces thermal shocks during temperature ramp-up and ramp-down cycles
3. Contamination Suppression and Process Purity
In semiconductor manufacturing, contamination control is paramount. Metallic or particulate contamination can severely degrade device yield. The Quartz Flow Baffle, made from ultra-high-purity synthetic fused silica (SiO₂ ≥ 99.99%), introduces no metallic ions or carbon residues into the process chamber. Its smooth, non-porous surface prevents accumulation of reaction byproducts and particle shedding. This ensures cleanroom-grade stability for critical processes such as gate oxide formation, diffusion doping, and CVD dielectric deposition.
Semixlab Quartz Flow Baffle is not merely a passive component 一 it is a critical enabler of process stability, gas uniformity, and yield optimization. Through its advanced flow dynamics design, thermal balancing, and ultra-clean material composition, it ensures that each wafer receives a precisely controlled process environment-essential for next-generation semiconductor device fabrication.
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