Precision Alumina Ceramic Location Rod for Semiconductor Fixtures
St.Cera’s ceramic location rod is precision ground from 99.8% high-purity alumina (Al₂O₃). It provides high hardness (16 GPa), excellent wear resistance, and dimensional stability. Diameter tolerances as tight as ±0.005 mm, length up to 150 mm. The rod surface is lapped to Ra ≤0.2 μm for smooth insertion and removal. Used as alignment pins, dowel pins, or positioning stops in semiconductor process fixtures, wafer cassettes, and inspection equipment.
Specifications (based on 99.8% Al₂O₃):
| Property | Value |
| Material | 99.8% Alumina (Ivory) |
| Density | 3.93 g/cm³ |
| Flexural Strength | 361 MPa |
| Vickers Hardness | 16 GPa |
| Young’s Modulus | 380 GPa |
| Diameter Range | 1–20 mm |
| Length Range | 5–150 mm |
Applications:
- · Wafer cassette alignment pins
- · Lift pin guide bushings
- · Fixture locating dowels
- · Probe card alignment posts
Advantages over Steel:
- · Non-magnetic, corrosion-resistant
- · No particle generation from wear
- · Electrically insulating (>10¹⁴ Ω·mm²/m)
Customization:
Chamfered ends, step diameters, threaded holes, or custom tip profiles.
