Introduction of Fused Quartz Cleaning Tanks

In high-tech manufacturing sectors such as semiconductor integrated circuits, photovoltaic solar cells, and micro-electromechanical systems (MEMS), the performance of finished components hinges entirely on the precision of their microscale structures. Once production processes shrink down to nanometer, or even atomic dimensions, even minuscule surface contaminants, including particulate debris, metallic ion impurities, and organic residue, can degrade device performance or render components completely non-functional. Against this backdrop, wet chemical cleaning has become an indispensable and crucial step in the whole manufacturing workflow.

Fused quartz cleaning tanks, as the core carrier components in the wet chemical cleaning processes, with the multiple important functions listed as below:

1. Stable Vessel for Chemical Reactions

These tanks serve as reaction chambers for standard wafer cleaning protocols including RCA cleaning and SPM cleaning. They deliver a consistent chemical environment for core wafer treatment steps: stripping surface oxide layers, breaking down organic grime, and extracting metallic ion impurities from wafer surfaces.

2. Inert Carrier for Corrosive Process Chemicals

Wafer cleaning relies on highly aggressive chemistries: concentrated sulfuric acid (H₂SO₄), hydrofluoric acid (HF), nitric acid (HNO₃), aqua regia (HCl + HNO₃), ammonium hydroxide (NH₄OH), hydrogen peroxide (H₂O₂), and more. These solutions become even more corrosive at elevated temperatures, and degrade nearly all common structural materials. Fused quartz stands out as one of the few materials that can safely hold these high-purity etchants without corrosion or secondary contamination.

3. Safe Thermal Control Medium

Many vital cleaning recipes (such as standard RCA cleaning) run at high temperatures to speed up chemical reactions and boost cleaning efficiency. Fused quartz features an ultra-low coefficient of thermal expansion and exceptional thermal stability. It withstands extreme, rapid temperature swings from room temperature up to high heat without cracking, safeguarding cleaning process safety and delivering steady thermal conditions for temperature-sensitive chemical reactions.

4. Reliable Barrier Against Cross-Contamination

High-grade fused quartz has extremely low metal ion content, and its purity exceeds 99.99%. Trace metal leachables (Na⁺, K⁺, Fe²⁺ and other metallic species) are limited to parts-per-billion (ppb), even parts-per-trillion (ppt) levels. Chemically inert by nature, fused quartz resists nearly all industrial acids, with only hydrofluoric acid and hot phosphoric acid able to etch its surface. Its dense, ultra-smooth, hard surface resists chemical erosion that generates loose particulate flakes, and barely traps airborne contaminants. Acting as a physical partition between wafers and the surrounding environment, it keeps external pollutants out of the process bath and prevents the tank itself from becoming an internal contamination source.

Applications of Fused Quartz Cleaning Tanks

1. Semiconductor Manufacturing

Applied for wafer wet cleaning across front-end and back-end fabrication steps of semiconductor manufacturing to ensure wafer cleanliness, which directly impacts critical device metrics including gate oxide integrity and junction leakage current.

2. Photovoltaic Industry

Core equipment for key silicon wafer treatment processes: texturing, PSG (phosphosilicate glass) removal, and damaged layer etching. Cleanliness directly determines solar cell power conversion efficiency.

3. Microelectronics & Optoelectronics

Supplies particle-free wet processing for MEMS chips, compound semiconductor wafers, optical fiber components and other precision micro-devices.

4. Analytical Laboratory Testing

Ideal containers for high-purity reagent storage, sample pre-treatment, and supporting analytical instrumentation, eliminating background interference to guarantee accurate trace-level analysis results.