Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS)

Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS) generates secondary ions from the surface of a sample by bombardment with a beam of high energy primary ions. The resulting secondary ions of various analyte species are then identified by Time of Flight Mass spectrometry. Surface composition as well as near surface depth profiles can be obtained.

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Overview
Test Process
Specifications
Instrumentation
Results and Deliverables

Overview

Time of Flight Secondary Ion Mass Spectrometry (TOF-SIMS) is an advanced surface analysis technique that is utilized to identify the chemical composition of materials at very small scales. TOF-SIMS is based on bombarding the surface of a sample with a focused ion beam, from where secondary ions are emitted.

These ions are recognized on the basis of their time of flight in a mass spectrometer. TOF-SIMS is an important tool for analyzing thin films, semiconductors, polymers, biomaterials, and contaminants owing to its very high surface sensitivity.

Scope

TOF-SIMS testing evaluates the chemical composition and molecular distribution of material surfaces and thin layers. The technique enables highly sensitive detection of elements and compounds present on the outermost surface of materials.

The scope includes:

Surface chemical composition analysis
Detection of trace contaminants and impurities
Elemental and molecular identification
Thin film and coating characterization
Depth profiling of layered materials

Applications

Semiconductor and microelectronics analysis
Polymer and coating characterization
Thin film and multilayer material analysis
Biomedical and biomaterial research
Surface contamination and failure analysis

Benefits

Extremely high surface sensitivity (ppm–ppb level)
Provides elemental and molecular information
Enables surface imaging and chemical mapping
Supports depth profiling of multilayer structures
Useful for failure analysis and quality control

Test Process

Sample Preparation

The sample surface is cleaned and mounted in the vacuum chamber to ensure accurate surface analysis.

Primary Ion Bombardment

A focused primary ion beam strikes the sample surface, ejecting secondary ions from the outermost layers.

Time-of-Flight Mass Analysis

The emitted ions travel through a time-of-flight analyzer, where their mass-to-charge ratio is determined.

Data Processing and Interpretation

The detected ions are analyzed to generate mass spectra and maps that reveal surface composition.

Technical Specifications

Parameter	Details
Technique Type	Surface chemical analysis
Ion Source	Primary ion beam
Mass Analyzer	Time-of-Flight mass spectrometer
Analysis Depth	~1–2 nm surface layer
Detection Sensitivity	Parts per million (ppm) to parts per billion (ppb)
Spatial Resolution	Up to sub-micrometer level
Operating Environment	Ultra-high vacuum (UHV)
Data Output	Mass spectra, chemical images, depth profiles

Instrumentation Used for Testing

TOF-SIMS Analyzer
Primary Ion Source
Ultra-High Vacuum Chamber
Ion Detector System
Data Acquisition and Analysis Software

Results and Deliverables

Surface chemical composition report
Mass spectra analysis
Elemental and molecular identification
Surface chemical imaging maps
Depth profile analysis report

Why Choose Infinita Lab for Time-of-Flight Secondary Ion Mass Spectrometry ?

Infinita Lab is a trusted USA-based testing laboratory offering Time-of-Flight Secondary Ion Mass Spectrometry testing services across an extensive network of accredited facilities across the USA.

Infinita Lab is built to serve the full spectrum of modern testing needs—across industries, materials, and methodologies. Our advanced equipment and expert professionals deliver highly accurate and prompt test results, helping businesses achieve quality compliance and product reliability.

Looking for a trusted partner to achieve your research goals? Schedule a meeting with us, send us a request, or call us at (888) 878-3090 to learn more about our services and how we can support you. Request a Quote

Frequently Asked Questions

TOF-SIMS is an advanced surface analysis technique that uses ion bombardment and mass spectrometry to identify elements, isotopes, and molecular fragments on material surfaces with extremely high sensitivity and spatial resolution.

TOF-SIMS provides detailed information about surface chemical composition, molecular fragments, elemental distribution, and trace contaminants. It can also generate chemical maps and depth profiles of thin films or layered structures.

TOF-SIMS typically analyzes the outermost 1–2 nanometers of the material surface. With controlled sputtering, it can also perform depth profiling to study multilayer structures and thin film interfaces.

TOF-SIMS is important in semiconductor manufacturing because it can detect extremely small amounts of impurities, dopants, and contaminants that may affect device performance, reliability, and manufacturing quality.

Unlike conventional mass spectrometry, TOF-SIMS focuses on analyzing the outermost surface layers of materials using ion bombardment, enabling detailed chemical mapping and surface-sensitive analysis at microscopic scales.