Precision Ceramic Guiding Tube for Wire Bonding & Die Attach
St.Cera’s ceramic guiding tube is manufactured from 99.5% alumina or yttria-stabilized zirconia, offering high wear resistance and a smooth inner bore (Ra ≤0.2 μm). These tubes are critical components in wire bonders, die attach machines, and pick-and-place equipment, guiding bonding wires, capillaries, or vacuum nozzles with minimal friction and zero particle contamination.
Specifications (Alumina 99.5%):
| Property | Value |
| Materia | 99.5% Al₂O₃ or ZrO₂ |
| Inner Diameter (ID) | 0.5 – 10 mm |
| Outer Diameter (OD) | 1 – 15 mm |
| Length | 5 – 150 mm |
| ID Tolerance | ±0.005 mm |
| Surface Roughness (ID) | Ra ≤0.2 μm |
| Straightness | ≤0.02 mm over 100mm |
| Hardness (Al₂O₃) | 15.5 GPa |
Applications:
Wire bonding machine wire guides (gold, copper, aluminum wires)
Die attach epoxy dispensing needles
Vacuum pickup tool guides
Fiber optic ferrule alignment sleeves
Manufacturing Process:
Green machining → sintering → diamond reaming and honing of ID → OD centerless grinding → laser marking. 100% bore inspection with air gauge or optical comparator.
Quality Assurance:
Each tube is checked for ID/OD concentricity (≤0.01 mm TIR), surface finish (profilometer), and visual inspection under 20x microscope for cracks or chips.
Advantages over Metal Guides:
10x longer life (no galling or wear)
No wire scratching or particle generation
Chemically inert to solvents and fluxes
Custom Options:
Tapered ID, flanged ends, different materials (zirconia for higher toughness, SiC for extreme wear).
Small batch prototyping available.
