Overview
IEC 60749-16:2003 is an international standard that specifies a non-destructive mechanical and climatic test method called Particle Impact Noise Detection (PIND). This test targets the detection of loose particles inside cavity semiconductor devices, which could adversely affect device reliability. Such particles include ceramic chips, bonding wire fragments, or solder balls (prills).
The standard is published by the International Electrotechnical Commission (IEC) and forms part of the IEC 60749 series, which covers mechanical and climatic testing for semiconductor devices.
Key Topics
- Purpose of PIND Test: To identify loose particles trapped inside semiconductor packages without damaging the devices.
- Test Principle: The device under test is subjected to controlled mechanical vibrations and shocks. Any loose internal particles impact the inner surfaces, generating acoustic noise detected by sensitive transducers.
- Key Equipment:
- Sinusoidal vibration shaker with controlled output (200 m/s peak at 40 Hz–250 Hz)
- Mechanical shock mechanism delivering short, high peak shocks (10,000 m/s ± 2,000 m/s peak)
- Acoustic transducer coupled acoustically to the device
- Amplifier and threshold detector for signal processing
- Acoustic coupling materials ensuring optimal transmission of impact noise
- Acoustic Signal Detection: An acoustic sensor detects particle impacts by capturing the noise generated within the device cavity. This noise is amplified and monitored to confirm particle presence.
- Test Procedure Overview:
- Devices are mounted to the vibration system with appropriate coupling.
- Vibration and shocks are applied sequentially while monitoring output signals.
- Devices passing the test exhibit no impact noise above threshold, indicating absence of loose particles.
- Safety and Precision Considerations: The standard emphasizes precautions for electrostatic discharge (per IEC 61340-5-1) and sets strict noise and sensitivity limits to ensure reliable detection.
Applications
The IEC 60749-16 standard serves critical roles in the semiconductor manufacturing and quality assurance processes:
- Package Integrity Testing: Ensures that cavity packages are free from contaminants or loose material that could cause failure.
- Quality Control: Used in production lines for screening semiconductor devices before assembly or shipment.
- Reliability Verification: Helps prevent latent failures attributed to foreign particles, thus improving product reliability.
- Supplier Compliance: Provides a uniform test method to certify devices from various manufacturers meet international quality standards.
- Failure Analysis: Assists in identifying defective devices exhibiting internal contamination.
Related Standards
- IEC 60749 Series: Comprehensive mechanical and climatic test methods for semiconductor devices.
- IEC 61340-5-1: Protection of electronic devices from electrostatic discharge (ESD), relevant for device handling during PIND testing.
- ISO/IEC Directives, Part 2: Guidelines followed during the preparation of IEC 60749-16 ensuring international consensus and consistency.
- Other mechanical shock and vibration standards applicable to semiconductor and electronic components testing.
IEC 60749-16 is essential for manufacturers aiming to uphold high reliability and safety standards in semiconductor device production. Adoption of this standardized PIND test enhances confidence in device integrity and supports the broader goal of international standardization in electronics manufacturing.
Open preview (PDF)Semiconductor devices - Mechanical and climatic test methods - Part 16: Particle impact noise detection (PIND)
