Precision 304 Stainless Steel Semiconductor Cavity Component: High-Accuracy Milling with Strict Perpendicularity and Flatness Control

We successfully manufactured a high-precision 304 stainless steel semiconductor cavity component for a semiconductor process chamber application. This critical vacuum chamber component demands exceptional perpendicularity and flatness to ensure reliable sealing and precise component alignment in demanding semiconductor manufacturing environments.

Project Overview

Key Technical Highlights

• Ultra-Strict Geometric Control: Achieved flatness ≤0.005mm on sealing surfaces and perpendicularity ≤0.01mm between critical features, ensuring leak-free vacuum sealing and precise component alignment in semiconductor chamber assemblies.
• Process Innovation:
  • Stress-Relief Heat Treatment: Pre-machining stress-relief annealing eliminates material residual stresses, preventing geometric distortion during finishing operations.
  • Multi-Stage Finishing Strategy: Roughing, semi-finishing, and ultra-precision finishing passes with optimized cutting parameters achieve sub-micron flatness and perpendicularity.
  • Low-Stress Fixturing: Custom fixturing solutions minimize workpiece distortion during clamping, preserving geometric integrity throughout the machining process.
• Surface Integrity:
  • Precision finishing delivers Ra≤0.8μm surface finish on critical sealing surfaces.
  • Controlled machining parameters minimize work hardening and surface defects.

Quality Verification

Each component underwent comprehensive inspection using CMM measurement for flatness (≤0.005mm), perpendicularity (≤0.01mm), and dimensional accuracy, supplemented by surface roughness testing (Ra≤0.8μm) and visual inspection for surface integrity.

Industry Applications

This project demonstrates our expertise in precision semiconductor vacuum chamber components, ideal for:
✓ Semiconductor process chambers ✓ Vacuum deposition equipment ✓ Plasma etching systems ✓ CVD/PVD chamber assemblies

Why Partner With Us?

• Proven ultra-precision milling expertise for demanding geometric tolerances
• Integrated stress-relief heat treatment and low-stress fixturing capabilities
• 12+ years of Precision machining experience across semiconductor equipment sectors