Semiconductor Contamination Analysis — Wafer, Process & Assembly
Contamination control drives semiconductor yield. Analysis identifies what the contaminant is, where it sits and often where it came from — specify the device, process step and failure mode when requesting quotes.
What does it measure?
- Wafer surface metals by VPD-ICP-MS or TXRF; detection limits and element coverage differ between methods — confirm the elements and limits your process requires.
- Ionic contamination on assemblies under IPC-TM-650 methods: a bulk conductivity (ROSE-style) number and an ion-specific ion-chromatography profile answer different questions.
- Particle identification combining optical/SEM imaging with EDS or FTIR; organic residues may need TOF-SIMS, GC-MS or FTIR depending on volatility and thickness.
When is it used?
- Yield-loss and defect investigations
- Incoming material and chemical qualification
- Process tool and cleanroom contamination troubleshooting
- Failure analysis support for assemblies
Sample considerations
- State device/wafer format, process step and suspected contaminant class.
- Note handling constraints: clean packaging, ESD sensitivity and chain of custody.
- Provide required detection limits or the specification limits you must meet.
Laboratories with relevant capabilities
- NSL Analytical Services (Cleveland, OH) — Chemical Analysis, Elemental Analysis, Metallurgical Analysis
- TÜV Rheinland of North America (Pleasanton, CA) — Electrical & EMC, Wireless & RF, Product Safety
- EAG Laboratories (Sunnyvale, CA) — Semiconductor Analysis, Failure Analysis, Reliability Testing
- University of Utah Materials Characterization Lab (Salt Lake City, UT) — Materials Characterization, Materials Testing, Failure Analysis
Confirm standard edition, jurisdiction and actual laboratory scope. Service references are not partnerships or endorsements.