Key Electronic Chemicals Used in Semiconductor and PCB Manufacturing
Semiconductor fabs and PCB plants both consume large volumes of process chemicals, but the two supply chains have very different requirements. Understanding which chemical categories are involved — and what quality level each application actually needs — helps buyers avoid both over-specifying (and overpaying) and under-specifying (and risking yield problems). This overview covers the main groups of electronic chemicals used in semiconductor and PCB manufacturing, and the documentation buyers should request before ordering.
Semiconductor vs PCB: Two Different Purity Worlds
Semiconductor wafer processing typically demands the highest purity levels in the industry, with metallic impurities controlled at ppb or even ppt levels and strict particle counts. PCB manufacturing also requires consistent, reliable chemistry, but tolerances are generally wider and industrial or fine-chemical grades are often sufficient for many process steps.
For buyers, the practical consequence is that "electronic grade" is not one fixed standard. The right specification depends on the process step, the substrate and the customer's own qualification requirements. Demand for these materials continues to grow — see our article on how AI infrastructure is driving demand for electronic chemicals in China for the market context.
Solvents and Cleaning Chemicals
Solvents are the workhorses of electronics manufacturing. Common examples include isopropyl alcohol (IPA), アセトン, NMP, PGMEA and various glycol ethers, used for cleaning, degreasing, photoresist handling and drying steps. The key variables are purity level, 水分含有量, metal impurity profile and particle control.
The same solvent name can cover several very different products: an industrial-grade solvent and a high-purity electronics-related grade may differ significantly in price, availability and documentation. We cover this topic in more detail in how to source high-purity solvents for electronics applications from China.
Etching and Stripping Chemicals
Etchants remove material selectively — examples include acids and acid blends for copper etching in PCB production, and specialty formulations for oxide, nitride or metal etching in wafer processing. Strippers remove photoresist and residues after patterning. For these products, buyers should pay attention to concentration tolerances, stabilizer systems, shelf life and compatible packaging, since many etchants are corrosive and classified as dangerous goods for transport.
Photoresist-Related Materials
Beyond the photoresists themselves, this group includes developers, edge-bead removers, thinners, adhesion promoters and related process chemicals. These materials tend to be more formulation-sensitive than commodity solvents: performance depends not only on the main component but also on trace impurities and batch-to-batch consistency, so a defined specification and a consistent supply source matter more than in most other categories.
Specialty Additives and Polymers
Electronics manufacturing also consumes specialty polymers and additives — resin raw materials for laminates and encapsulation, flame retardants for boards and housings, and functional additives that improve thermal or mechanical performance. These are usually purchased against a technical data sheet rather than an electronics-industry purity standard, but supplier consistency and documentation remain just as important.
Documentation to Request Before Ordering
Whatever the category, the documentation set is what turns a chemical name into a defined product. Depending on product type, supplier and order stage, buyers should expect to discuss: a certificate of analysis (COA) against an agreed specification, a safety data sheet (SDS/MSDS) in the destination language where required, a technical data sheet (TDS) 該当する場合, and — for higher-purity products — an impurity or trace-metal profile. Availability of specific documents varies by product and supplier, so it is worth confirming the documentation package before confirming the order.
Buyer Checklist
- Define the process step and the actual purity level required — not just "electronic grade".
- Request the supplier's specification sheet and compare it line by line with your requirement.
- Ask for a recent COA and, for high-purity products, an impurity profile.
- Confirm SDS availability and transport classification, especially for corrosive or flammable products.
- Check packaging options and compatibility (drums, IBCs, cleanliness level of containers).
- Clarify lead time, minimum order quantity and batch consistency expectations.
- Agree on the full documentation package before payment, not after shipment.
How SUNCHEM Can Support Your Sourcing
SUNCHEM works with qualified Chinese producers across solvents, specialty chemicals and polymer materials, and can support sourcing discussions for suitable industrial, fine-chemical or higher-purity grades depending on product type, supplier availability and order stage. If you are mapping suppliers for a specific chemical or comparing specifications, you are welcome to get in touch with our team — a short exchange about your application and destination requirements is usually the fastest way to see what is feasible.