INDUSTRY COMPONENT

Capillary

Precision capillary component for wire bonding in semiconductor packaging that creates electrical connections between chips and substrates.

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Component Specifications

Definition
A capillary is a critical consumable component in wire bonding machines used in semiconductor manufacturing. It is a precisely engineered ceramic or tungsten carbide tube with specific tip geometry that guides bonding wire (typically gold, copper, or aluminum) to create interconnections between integrated circuit chips and their packaging substrates. The capillary controls wire looping, applies ultrasonic energy and force during bonding, and ensures consistent ball formation and stitch bonding.
Working Principle
The capillary operates through a combination of mechanical guidance, thermal management, and ultrasonic energy transmission. During ball bonding, the capillary tip positions the wire precisely, applies controlled force and ultrasonic vibration to create metallurgical bonds at both the chip bond pad and substrate lead. The internal bore guides the wire while the tip geometry controls loop shape and bond deformation. Heat is applied through the capillary to facilitate bonding in thermosonic processes.
Materials
High-purity alumina ceramic (Al2O3) or tungsten carbide (WC) with specific grain sizes and density requirements. Ceramic capillaries typically use 99.5%+ alumina with controlled porosity <0.1%. Tungsten carbide variants may include cobalt binder (6-12%). Surface finishes achieve Ra <0.2μm.
Technical Parameters
  • Face Angle 90-120°
  • Tip Diameter 50-150 μm
  • Hole Diameter 15-50 μm
  • Chamfer Diameter 75-200 μm
  • Material Hardness 1500-2000 HV (ceramic), 1400-1800 HV (tungsten carbide)
  • Wire Compatibility Gold (15-50 μm), Copper (20-75 μm), Aluminum (25-100 μm)
  • Operating Temperature Up to 300°C
Standards
ISO 14644-1, SEMI E49, JEDEC JESD22-A108

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Capillary.

wire bonding capillary semiconductor capillary bonding tool ceramic capillary tungsten carbide capillary ball bonding stitch bonding semiconductor assembly chip packaging Capillary Capillary in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Wire Bonder

A precision machine used in semiconductor packaging to create electrical connections between integrated circuits and their packages using fine wires.

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Engineering Analysis

Risks & Mitigation
  • Tip clogging from wire debris
  • Chipping or cracking during handling
  • Thermal degradation at high temperatures
  • Inconsistent bonding due to wear
  • Contamination from improper cleaning
FMEA Triads
Trigger: Accumulation of wire material in capillary hole
Failure: Wire feed obstruction leading to bond misses or wire breaks
Mitigation: Implement regular plasma cleaning cycles and use anti-stick coatings
Trigger: Mechanical impact during machine crashes or mishandling
Failure: Tip chipping causing inconsistent bond shapes and poor electrical connections
Mitigation: Install crash detection systems and use proper handling tools during replacement
Trigger: Thermal cycling during bonding operations
Failure: Material fatigue and micro-cracking reducing capillary lifespan
Mitigation: Optimize bonding temperature profiles and use materials with matched thermal expansion coefficients

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Tip diameter ±2 μm, Hole diameter ±1 μm, Chamfer diameter ±5 μm, Concentricity <3 μm
Test Method
Optical microscopy per SEMI E49, dimensional verification with coordinate measuring machines, bond strength testing per JEDEC JESD22-B116

Buyer Feedback

★★★★☆ 4.7 / 5.0 (34 reviews)

"Found 36+ suppliers for Capillary on CNFX, but this spec remains the most cost-effective."

"The technical documentation for this Capillary is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Computer, Electronic and Optical Product Manufacturing environments. No issues with the Capillary so far."

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Frequently Asked Questions

What is the typical lifespan of a wire bonding capillary?

Capillary lifespan varies from 500,000 to 2 million bonds depending on material, wire type, and bonding parameters. Ceramic capillaries typically last longer than tungsten carbide for gold wire, while tungsten carbide is preferred for copper wire bonding.

How does capillary geometry affect bonding quality?

Tip diameter controls bond size and deformation. Hole diameter must be 1.2-1.5 times wire diameter for proper guidance. Chamfer diameter affects ball formation consistency. Face angle influences stitch bond quality and tail formation.

What maintenance is required for capillaries?

Regular cleaning with plasma or ultrasonic methods to remove contamination, inspection for tip wear or chipping, and replacement when bond quality degrades or dimensional tolerances exceed specifications.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Capacitors Carbon Conductive Additive