Applications of Quartz Rods in Quartz Welding and Quartz Boat Fabrication

1. Core Material Properties‌

• ‌Ultra-High Purity‌: Quartz rods (quartz rods/pushrods) exhibit >99.998% SiO₂ purity with metal impurities ≤0.1 ppm, critical for contamination-sensitive processes like semiconductor wafer handling.
  

• ‌Thermal Stability‌: Maintain structural integrity at temperatures exceeding 1,200°C during welding/casting operations.
  

‌2. Quartz Welding Applications‌

• ‌High-Temperature Fusion‌:

• Serve as filler material for joining quartz components (e.g., plates, tubes) in inert-gas furnaces at 800–1,200°C, forming monolithic structures without adhesives.
  

• ‌Precision Joint Fabrication‌:

• Enable hermetic sealing of quartz cleaning tanks and reactor chambers via controlled thermal expansion matching.
  

‌3. Quartz Boat Manufacturing‌

• ‌Structural Framework‌:

• Quartz rods form the base frame (e.g., bottom/lateral connecting rods) of quartz boats, providing mechanical support for silicon wafers during high-temperature diffusion processes.
  

• ‌Innovative Groove Design‌:

• Trapezoidal-section grooves machined into rods ensure linear contact (vs. surface contact) with wafers, eliminating dead diffusion zones and reducing leakage currents.
  

• Optimizes slot depth consistency (±5 μm) and chamfered edges to prevent wafer scratching.
  

‌4. Semiconductor Implementation‌

• ‌Chemical Resistance‌:

• Withstand corrosive agents (HF/H₂SO₄) in etching/cleaning baths with erosion rates <0.1 μm/h.
  

• ‌Critical Tolerance Control‌:

• Diamond wire-sawn rods (e.g., Φ150×100 mm) achieve dimensional accuracy <5 μm for advanced-node (<10 nm) wafer processing.
  

Technical Highlights

Quartz rods ensure contamination-free, thermally stable frameworks essential for semiconductor quartz welding and precision boat fabrication.