Precision 7075 Aluminum Semiconductor Cavity Component: Two-Tone Anodizing Process with Natural + Black Finish

We successfully manufactured a precision 7075 aluminum semiconductor cavity component featuring a specialized two-tone anodizing process with natural and black anodized finishes for a semiconductor equipment manufacturer. This advanced Surface Treatment solution enables visual differentiation of functional zones and enhances wear resistance on critical interfaces while maintaining precise aesthetic control for semiconductor chamber applications.

Project Overview

Key Technical Highlights

• Two-Tone Anodizing Process: Developed a specialized selective anodizing process applying natural (clear) and black dyed anodized finishes to designated areas of a single component, enabling visual differentiation and functional optimization in semiconductor chamber assemblies.
• Process Innovation:
  • Precision Masking Application: Custom masking solutions protect designated areas during selective anodizing, ensuring clean, precise color boundaries and preventing electrolyte contamination.
  • Sequential Anodizing: Controlled anodizing sequence ensures consistent coating thickness (15-25μm) for both natural and black finishes across the component.
  • Post-Anodizing Machining: Precision re-machining of critical sealing surfaces after anodizing ensures final flatness (≤0.01mm) and surface finish (Ra≤1.6μm) integrity.
• Quality Control:
  • Coating thickness verification (15-25μm) per MIL-A-8625 standards.
  • Color consistency validation for both natural and black finishes.
  • Masking boundary inspection for clean color transitions.

Quality Verification

Each component underwent comprehensive inspection using CMM measurement for flatness (≤0.01mm) and dimensional accuracy (±0.02mm), supplemented by anodized coating thickness verification (15-25μm), color consistency inspection, and masking boundary visual inspection.

Industry Applications

This solution demonstrates our expertise in advanced semiconductor component manufacturing with selective surface treatment, ideal for:
✓ Semiconductor process chambers ✓ Vacuum equipment components ✓ Functional zone differentiation applications ✓ High-wear critical interface components

Why Partner With Us?

• Proven selective anodizing expertise with advanced masking technology
• In-house two-tone anodizing capabilities with MIL-spec compliance
• 12+ years of Precision machining experience across semiconductor equipment sectors