As a core part of the high-tech industry, the semiconductor industry is critical to supporting the development of the digital economy and promoting industrial transformation and upgrading. It imposes extremely strict requirements on the refinement and purity of the production process. The purity, impurity content, and reaction stability of auxiliary materials directly affect the quality of semiconductor products. As a high-performance and widely applicable chemical material, sodium persulfate plays an indispensable role in many key processes of semiconductor manufacturing, including cleaning, micro-etching, and surface roughening in back-end processes, packaging, power devices, and lead frame processing, relying on its unique physical and chemical properties.
Ⅰ. Surface Cleaning of Semiconductor Materials
During semiconductor production, various substrates tend to accumulate impurities such as oil stains, organic residues, and thin oxide layers. If not completely removed, these impurities will severely impair subsequent processing, even leading to product scrappage and production losses.
With strong oxidizing properties, sodium persulfate can efficiently decompose and remove organic contaminants on substrate surfaces. Under strictly controlled concentration, temperature, and processing time, the cleaning process is mild and effective, penetrating micro gaps on the substrate surface to achieve thorough cleaning while minimizing damage to the substrate itself, meeting the requirements for substrate integrity in semiconductor packaging and back-end manufacturing.
Sodium persulfate produced by Fujian Zhanhua Chemical features high purity and extremely low impurity content, with strict control of impurities such as iron and manganese at trace levels. This effectively avoids secondary contamination of semiconductor substrates from residual impurities during cleaning, ensuring the required purity after treatment.
Ⅱ. Etching of Semiconductor Components
Etching is one of the key processes in semiconductor production, determining the structural precision of components. Its core purpose is to remove excess metal or semiconductor materials from the substrate surface to form fine structures as designed.
Sodium persulfate is widely used in roughening and etching for back-end semiconductor processing, power devices, and metal-layer materials. Leveraging its excellent oxidizability, it converts the target removal parts on the substrate surface into easily soluble and removable substances, achieving accurate and uniform etching. The stable and uniform etching performance satisfies the demands for miniaturized and high-precision semiconductor components, helping improve structural accuracy and performance stability.
Fujian Zhanhua Chemical has established a strict production quality control system covering raw material selection to finished processing. Its sodium persulfate provides stable and qualified active oxygen content, ensuring uniform and sustained oxidation during etching. This effectively avoids issues such as uneven etching depth and edge burrs caused by fluctuating active oxygen, guaranteeing consistent etching results.
Ⅲ. Surface Roughening of Lead Frames
As the core component connecting semiconductor devices to external circuits, lead frames serve as an important carrier for signal transmission and power supply. Their surface roughness directly affects the stability of subsequent welding and packaging processes, thus determining the reliability and service life of semiconductor components.
Sodium persulfate is used for surface roughening of lead frames. Through controllable chemical reactions, it moderately etches the lead frame surface to form a uniformly rough structure, improving adhesion with packaging materials. Treated lead frames are better compatible with subsequent welding and packaging, reducing risks such as poor connection and delamination, and effectively ensuring the overall performance of semiconductor components.
Sodium persulfate from Fujian Zhanhua Chemical meets high-standard specifications through professional testing, with excellent batch-to-batch consistency. In lead frame roughening, it ensures uniform treatment results across different batches, avoiding uneven roughness caused by product quality variations.
Conclusion
Due to its strong oxidizing properties, sodium persulfate plays a vital role in multiple key semiconductor processes, including packaging cleaning, metal-layer micro-etching, and lead frame surface roughening. With stable performance and strong adaptability, it precisely meets the high-quality production requirements of the semiconductor industry.
As the semiconductor industry continues to upgrade and the demand for miniaturized, high-performance products grows, the application scenarios of sodium persulfate will further expand. Fujian Zhanhua Chemical will continue to focus on the needs of the semiconductor industry and provide strong support for the innovative development of the semiconductor sector based on its product and quality control advantages.