Where High-Purity Meets Corrosion-Resistant

The semiconductor industry demands high-purity coatings for cleanrooms.

When a part comes in to Crest Coating that needs to be coated for the semiconductor industry, the customer doesn’t always tell us the function that part will perform. They will usually tell us, though, that the coating needs to be corrosion-resistant and high-purity. We assume, of course, that the component might be used in a factory “cleanroom,” where even the minutest particle must be accounted for.

Semiconductor factories want to coat all exposed metal surfaces because of the possibility of ruined product batches from metal or rust particle contamination. The coating properties the semiconductor industry finds attractive include corrosion resistance, high-purity, high release, chemical inertness, and easy cleanup. Common applications are fluoropolymers such as Teflon™ coatings and Xylan® coatings, as well as Halar thermoplastics.

What’s a High-Purity Coating?

The high-purity demand comes from the possibility that “impure” microscopic particles of the coatings might float through the air and contaminate wafer manufacturing chambers. These factories even coat composites such as silicon carbide and Quartz substrates. These composites are already highly corrosion-resistant, but the manufacturers know that a pure, durable fluoropolymer coating that is easy to clean and maintain is preferable to foreign particle contamination.

Here are common components used in the semiconductor industry and the high-purity, corrosion-resistant coatings the industry prefers:

• Mounting frames – Halar (w/high builds)
• Tanks – PFA or FEP
• Heating coils – PTFE
• Liquid nozzles – PFA or Halar
• Wafer carriers – PFA

At Crest Coating, we value the coating knowledge and application experience of our staff, who have decades of experience. To find the right coating for your next project, fill out this quick form today.