東陽理化学 List of Products and Services

This document, "Reasons to Choose Toyo Chemical," is an introductory material that clearly summarizes the strengths of Toyo Chemical Co., Ltd., a specialized company in metal surface treatment that has built trust and a track record for over 60 years. The biggest feature is the "integrated system of seven businesses." By completing all processes—from design, cutting, surface treatment, precision cleaning, inspection, packaging, to automation—within a single company, we achieve stable quality, shortened delivery times, and cost reductions. In particular, our electrolytic polishing achieves an industry-leading surface roughness of Ra=0.02μm, earning high praise in the semiconductor, medical device, and precision equipment sectors. The document also explains our compliance with ISO9001 and 14001, SEMI standards, and our quality assurance system through 100% inspection and traceability, along with data demonstrating our advantages compared to competitors. It introduces flexible technical responses, including the development of surface treatment agents and custom design of equipment tailored to customer challenges, with plenty of practical examples. Additionally, it contributes to improving productivity on-site through our achievements in self-developed automatic inspection and marking, as well as support for the automation of production lines. This document serves as a valuable resource for those in the technology, procurement, and quality departments who are looking for a reliable partner in surface treatment operations.

• Surface treatment contract service

Toyoh Chemical Co., Ltd. provides high-quality and high-precision processing services, specializing in metal surface treatment, focusing on electro-polishing, chemical polishing, and pickling. With smooth finishes of Ra=0.02μm and the ability to handle complex-shaped components, the company has gained trust in a wide range of fields, including semiconductor manufacturing equipment, medical devices, and food-related equipment. Additionally, the company offers consistent in-house support for precision cleaning compatible with clean rooms, vacuum packaging, and assembly. Through foreign matter management in environments ranging from Class 100 to 10,000, it can accommodate products that require high cleanliness. Furthermore, by performing everything from cutting and finishing to inspection and packaging in a consistent manner, Toyoh Chemical achieves short delivery times, high quality, and cost optimization. The company also develops its own metal surface treatment agents (degreasers, electrolytic solutions, rust inhibitors, etc.), surface treatment equipment, wastewater treatment facilities, and automatic inspection devices, providing optimal technology and equipment tailored to each customer's challenges. Leveraging over 60 years of experience and technical expertise, Toyoh Chemical contributes to solving challenges in manufacturing and enhancing product value.

• Surface treatment contract service

Vacuum packaging and assembly services are carried out under strict quality control in a cleanroom environment, ensuring high precision finishing of parts and products. By minimizing fine foreign substances and contamination in semiconductor, medical device, and precision machinery components, we reliably meet our customers' stringent quality standards. 【Service Features】 - Thorough management of clean environments Prevents foreign substance contamination under strict environmental control, ensuring high product reliability. - High-precision assembly Capable of assembling delicate components, achieving precise products. - Long-term maintenance of quality through vacuum packaging Maintains quality and prevents deterioration or oxidation during transport. 【Reasons for Selection】 - Flexible response tailored to customer specifications (capable of handling from small lots to mass production). - Peace of mind through rigorous inspection and quality assurance. - Optimal proposals based on extensive experience and know-how. Cleanroom environment: Class 100 (inside the bench), Class 1000 (inside the room). Packaging specifications: Vacuum packaging (double packaging, barrier bags, N2 filling, etc.). Assembly services: Precision component assembly, inspection, labeling, screw fastening, degassing treatment, etc.

• CVD Equipment
• Sputtering Equipment
• Resist Device

The passivation treatment by Toyo Chemical involves chemically re-forming a stable oxide film (passivation film) on the surface of stainless steel, significantly enhancing the metal's corrosion resistance as a post-processing technology. It reconstructs the protective film that may have been temporarily lost during processing, welding, or heat treatment, preventing rust formation and improving the reliability and durability of the product. This treatment is applicable not only to austenitic stainless steels but also to ferritic and martensitic stainless steels, with proven results in various materials including SUS304 and SUS316. It is often introduced as a subsequent process after pickling or degreasing, and when combined with electropolishing or buff polishing, it can yield further benefits in both appearance quality and functionality. Since the passivation treatment is a non-contact process using chemical solutions, it allows for uniform treatment of internal surfaces and complex shapes without the risk of deformation. It is also capable of handling large-scale processing, enabling stable supply at low costs. Main applications include medical devices, food manufacturing equipment, semiconductor-related components, sanitary piping, and valve parts. This treatment technology, which supports the production of rust- and corrosion-resistant products, has received high praise in environments where long-term quality maintenance is required.

• Other surface treatment equipment
• Surface treatment contract service
• Processing Contract

Toyo Rika Chemical Co., Ltd.'s electro-polishing is a surface treatment technology that achieves a high-smoothness and high-gloss finish by electrolyzing the metal surface in an electrolyte solution and selectively dissolving fine protrusions. It does not require physical polishing processes like buffing, allowing for uniform and highly reproducible treatment. This technology removes surface irregularities, burrs, and welding discoloration, providing not only aesthetic beauty but also practical effects that prevent dirt adhesion and corrosion. Furthermore, a strong oxide film is formed after treatment, enhancing the corrosion resistance of the metal and maintaining high quality over an extended period. Our company supports various stainless steel parts, including SUS304 and SUS316, and has a proven track record in various industries such as semiconductor manufacturing equipment parts, medical devices, food machinery, analytical instruments, and precision parts for research applications. We have established a system to provide high-quality finishes with short lead times for products that require cleanliness, durability, and aesthetics. Our high-precision, high-quality electro-polishing is the ideal solution for companies looking to enhance the added value of their products.

• Other surface treatment equipment
• Surface treatment contract service
• Processing Contract

The acid pickling treatment by Toyo Chemical removes scale, welding discoloration, oil, and impurities adhered to the surfaces of metals such as stainless steel through chemical reactions, bringing out the material's inherent luster, cleanliness, and corrosion resistance. It is widely used as a pre-process for electropolishing and passivation treatment, playing a crucial role in creating an important "foundation" that influences the quality of subsequent processes. The treatment is performed by immersing the materials in a specialized chemical solution, which means that no physical pressure is applied, allowing for a uniform finish even on complex shapes and the inner surfaces of pipes. There is almost no dimensional change or damage to the surface, enabling stable treatment regardless of product shape or material. The main target materials are stainless steels such as SUS304 and SUS316, and the shapes we accommodate include pipes, fittings, frames, and sheet metal structures, among others. Acid pickling treatment is effective not only for improving appearance but also for enhancing corrosion resistance, cleanliness, and coating adhesion. We have many successful applications in fields that require high cleanliness and durability, such as medical devices, food manufacturing equipment, and semiconductor-related components. From prototypes to mass production, we propose optimal treatment conditions tailored to your needs.

• Other surface treatment equipment
• Surface treatment contract service
• Processing Contract

Toyo Rika's chemical polishing is a surface treatment technology that dissolves metal surfaces through chemical reactions with chemical solutions, achieving a uniform finish without contact. Since no physical force is applied, there is no concern about deformation or scratches, allowing for stable processing of ultra-thin sheets and complex-shaped parts. It removes fine surface irregularities and burrs, resulting in an appearance that excels in glossiness and cleanliness. The process reaches areas and details that buff polishing cannot, and it is characterized by minimal finish inconsistencies. Dimensional changes are also kept to a minimum, making it ideal for finishing precision parts and products that require assembly and cleanliness in subsequent processes. Additionally, the processing speed is fast, making it suitable for mass production and offering excellent cost performance. The main targets are stainless steel (such as SUS304 and SUS316), with a wealth of application experience in mechanical parts, covers, frames, and sanitary components after cutting, pressing, and welding processes. It is widely adopted in fields where cleanliness and appearance quality are emphasized, such as medical devices, food manufacturing equipment, and precision equipment. At Toyo Rika, we thoroughly design processing conditions and quality control according to applications, allowing for flexible responses from small lots to mass production.

• Other surface treatment equipment
• Surface treatment contract service
• Processing Contract

The precision electrochemical polishing of Toyo Rika Co., Ltd. is a high-precision metal surface treatment technology that simultaneously achieves high smoothness with a surface roughness of Ra = 0.02μm or less and excellent corrosion resistance due to a Cr-rich layer. It realizes uniform smoothness and cleanliness that cannot be obtained through cutting processes, making it particularly suitable for stainless steel fluid components and precision mechanical parts. This technology removes fine irregularities at the nano level without applying processing stress, thereby enhancing aesthetics and functionality while avoiding deformation and processing scratches. Furthermore, it can accommodate thin tubes, inner surfaces, and complex-shaped parts that are difficult to polish with buffing, providing a highly uniform finish. The application fields are diverse, including gas supply system components and chamber parts for semiconductor manufacturing equipment, medical devices, food manufacturing machinery, analytical instruments, and scientific equipment, boasting many achievements in environments where cleanliness, durability, and reliability are required. Our company designs optimal processing conditions according to shape and application, and also supports process management, quality control, and traceability. We provide precision electrochemical polishing with stable quality from small lots to mass production.

• Other surface treatment equipment
• Surface treatment contract service
• Processing Contract