Identify and Eliminate Contamination at the Source
Recurring particles and fibers are not random—they have a source.
Foamtec provides advanced contamination root cause analysis using PolyCHECK® and SEM/FTIR to identify contamination, eliminate sources, and improve fab-wide performance.
How to Identify Particle and Fiber Contamination in Wafer Fabs
Particle and fiber contamination in semiconductor manufacturing leads to:
- Yield loss
- Wafer defects
- Tool instability
- Recurring process issues
However, most fabs struggle to:
- Identify contamination sources
- Differentiate between fiber types
- Trace contamination across tools or areas
Without root cause identification, contamination continues to repeat.
Most Contamination Problems Are Never Fully Solved
In many fabs:
- Particle issues are treated symptomatically
- Cleaning processes are adjusted without data
- Contamination sources are assumed—not confirmed
This leads to:
- Recurring defects
- Ineffective corrective actions
- Persistent yield loss
Detecting Large Fiber Contamination (>25 µm to >1000 µm)
Large fibers are a major but often overlooked contamination source in wafer fabs.
These fibers can:
-
- Cause critical defects
- Originate from wipes, garments, or packaging
- Be transported across tools and areas
From Contamination Detection to Root Cause
Capture Particles → Analyze Composition → Identify Source → Map Contamination → Eliminate Root Cause
Foamtec provides a structured approach to contamination analysis, enabling fabs to move from:
Unknown particles → actionable insight → process improvement
Advanced Contamination Analysis with PolyCHECK®
Identify the Source of Contamination with PolyCHECK®
PolyCHECK® combines:
- Surface sampling
- SEM (Scanning Electron Microscopy)
- FTIR (material identification)
To determine:
- Particle composition
- Fiber type and origin
- Contamination source
What You Learn
- Whether contamination is from wipes, garments, or process
- Composition of particles (polymer, metal, residue)
- Pathway of contamination across tools
- Root cause of recurring defects
Map Contamination Across the Fab
-
Contamination often spreads across:
- Tools
- Operators
- Cleaning materials
- Process steps
Foamtec helps identify:
- Cross-contamination pathways
- Shared contamination sources
- Fab-wide contamination patterns
Impact on Yield and Process Stability
- Reduced wafer defects
- Improved yield
- Elimination of recurring contamination
- Better process control
- Reduced troubleshooting time
- Improved tool performance
Where Contamination Root Cause Analysis Is Critical
- Etch and deposition tools
- Post-PM particle issues
- Yield excursions
- Defect analysis workflows
- Cleanroom contamination investigations
- Cross-tool contamination tracking
Frequently Asked Questions About Semiconductor Contamination
What causes particle contamination in wafer fabs?
Particles can come from process residue, cleaning materials, operator handling, and environmental sources.
What is FM analysis in semiconductor manufacturing?
Foreign material (FM) analysis identifies the composition and source of contamination.
How do you identify fiber contamination?
Using SEM and FTIR analysis to determine fiber type and origin.
Why do contamination issues keep recurring?
Because the root cause is not identified or eliminated.
What is cross-contamination in wafer fabs?
Contamination that spreads between tools, processes, or areas.
About Foamtec WCC
Foamtec's mission is to enable contamination control professionals to improve particle control in clean rooms by solving surface contamination challenges. The Wilshire Contamination Control Division of Foamtec International supplies clean room mops, foam swabs, microfiber swabs, foam wipers, microfiber wipers, UltraSOLV® ScrubPADS to address clean room cleaning and the critical cleaning of process equipment.