Precision 304 Stainless Steel Test Fixture Block: High-Stability Milling for Semiconductor Test Equipment

We successfully manufactured a high-precision 304 stainless steel test fixture block for a semiconductor test equipment application. This critical test interface component demands exceptional dimensional stability, flatness, and wear resistance to ensure reliable, repeatable test results across thousands of semiconductor device test cycles.

Project Overview

Key Technical Highlights

• Ultra-Stable Dimensional Control: Achieved ±0.015mm dimensional tolerance with 0.01mm flatness on critical test interface surfaces, ensuring consistent device positioning and reliable test results across production runs.
• Process Innovation:
  • Stress-Relief Heat Treatment: Pre-machining and post-machining stress-relief annealing eliminates residual stresses, preventing dimensional drift and ensuring long-term stability in semiconductor test environments.
  • Multi-Stage Milling Strategy: Roughing, semi-finishing, and finishing passes with controlled cutting parameters minimize thermal distortion and maintain geometric integrity.
• Surface Integrity:
  • Precision finishing delivers Ra≤1.6μm surface finish on test interface surfaces.
  • Burr-free edge preparation ensures clean device contact interfaces without contamination risk.

Quality Verification

Each component underwent comprehensive inspection using CMM measurement for dimensional accuracy (±0.015mm on critical interfaces) and flatness verification (≤0.01mm), supplemented by surface roughness testing and visual inspection.

Industry Applications

This solution demonstrates our expertise in precision semiconductor test fixture manufacturing, ideal for:
✓ Semiconductor test handlers ✓ Wafer probe stations ✓ Device characterization systems ✓ Reliability test equipment

Why Partner With Us?

• Proven precision milling expertise for stainless steel test fixtures
• Integrated stress-relief heat treatment capabilities for dimensional stability
• 12+ years of Precision machining experience across semiconductor and test equipment sectors