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● Quality Assurance

NCT Ionic Contamination Tester

Advanced Ionic Contamination Testing for PCBs and Electronic Components. The NCT delivers precision measurement of ionic contamination levels through both dynamic and static testing methods, fully compliant with IPC-TM-650 standards including R.O.S.E. test and Ion Chromatography.

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NCT ionic contamination tester for PCB cleanliness testing — front view, Neotel Technology NCT ionic contamination tester side view NCT ionic contamination tester rear view
KEY FEATURES

Precision Testing Built on IPC Standards

The NCT Neo Cleanliness Tester combines dynamic and static testing methods with high-precision conductivity measurement to deliver reliable ionic contamination analysis for mission-critical electronics.

Dynamic & Static Testing
Flexibility to adopt both dynamic and static testing methods as per IPC standards. Dynamic testing circulates solvent across the board surface for real-time contamination extraction, while static testing measures residual contamination in a controlled soak environment.
Precision Measurement
Accurately measures ionic contamination levels by detecting conductivity changes in the extraction solution. High-sensitivity sensors track ion concentration in real time, providing quantitative results in µg/NaCl/cm² for precise pass/fail determination against IPC thresholds.
IPC Standards Compliant
Fully compliant with IPC-TM-650 testing methods including ROSE test (2.3.25), Modified R.O.S.E. test (2.3.25.1), and Ion Chromatography (2.3.28). Meets the stringent requirements of aerospace, automotive, military, and telecommunications quality programs.
UNDERSTANDING THE PROBLEM

What is Ionic Contamination?

Ionic contamination is the presence of charged particles (ions) on electronic surfaces that can interfere with proper device functioning. These ions, introduced through dust, moisture, or pollutants, leave residues that can disrupt current flow, cause short circuits, or interfere with sensitive component operations.

Common sources include flux residues from soldering, handling contamination, environmental exposure, and chemical residues from cleaning processes. Even trace amounts of ionic contamination can compromise long-term reliability, particularly in high-density assemblies where conductor spacing is minimal.

WHY IT MATTERS

Why Ionic Contamination Testing is Critical

Ionic contamination testing is critical for aerospace, automotive, military, and telecommunications industries where electronic reliability is non-negotiable. Contamination-free PCBs are mandatory for conformal coating, epoxy staking, or underfill processes — any ionic residue beneath these protective layers becomes permanently trapped and will eventually cause field failures.

Flux residue is the primary concern in SMT manufacturing. Incomplete cleaning after soldering leaves ionic residues that cause delamination, poor wetting, and electrochemical migration. The NCT detects these residues before they become reliability risks, ensuring every board meets IPC cleanliness specifications before downstream processes.

STANDARDS

IPC-TM-650 Testing Methods

The NCT supports the complete range of IPC-TM-650 ionic contamination testing methods, from traditional R.O.S.E. testing to advanced ion chromatography preparation.

Testing Method IPC TM-650 Reference
R.O.S.E. Testing IPC TM 650 2.3.25
Modified R.O.S.E. Testing IPC TM 650 2.3.25.1
Ion Chromatography Ion Chromatography
SIR Testing for Materials IPC TM 650 2.6.3 Series
Electromigration Test IPC TM 650 2.6.14 Series
PERFORMANCE

Testing Performance at a Glance

The NCT delivers consistent, repeatable results across both dynamic and static testing modes, meeting the demanding requirements of high-reliability electronics manufacturing.

1.56
µg/NaCl/cm² IPC Limit
99.9%
Detection Accuracy
2-in-1
Dynamic & Static Methods
24/7
Continuous Testing
FAQ

Frequently Asked Questions

Common questions about ionic contamination testing and the NCT Neo Cleanliness Tester. For further detail, please contact our technical consultants.

What is an ionic contamination tester?
An ionic contamination tester measures the level of ionic (charged) residues left on a PCB or electronic assembly after soldering and cleaning. These residues, mainly from flux and process chemistry, can cause corrosion, dendrite growth, and electrical leakage in service. The NCT extracts and quantifies them, reporting results in micrograms of NaCl equivalent per square centimeter so boards can be passed or failed against IPC limits.
What is the difference between dynamic and static (ROSE) testing?
Both are Resistivity of Solvent Extract (ROSE) methods. In dynamic testing the extraction solution is continuously circulated across the board and the conductivity is monitored in real time, which is fast and well suited to production. In static testing the board soaks in a fixed volume of solution and the change in resistivity is measured after a set time. The NCT supports both methods in one machine so you can match the approach to your standard and throughput.
Which IPC standards does the NCT comply with?
The NCT follows the IPC-TM-650 test methods for ionic cleanliness: ROSE test (2.3.25), Modified ROSE test (2.3.25.1), and it supports workflows aligned with Ion Chromatography (2.3.28) for detailed ionic species analysis. These are the methods referenced by IPC-J-STD-001 and common aerospace, automotive, military, and medical quality programs.
What cleanliness limit does ionic contamination testing use?
The widely used ROSE pass/fail threshold is 1.56 micrograms of NaCl equivalent per square centimeter; assemblies measuring below this are generally considered clean. The exact limit applied depends on the product class and the customer specification, so the NCT lets you configure thresholds per job to match your quality requirements.
Which industries need ionic contamination testing?
Any manufacturer building high-reliability electronics benefits from ionic cleanliness testing: aerospace and defense, automotive electronics, medical devices, telecommunications, and industrial controls. In these sectors, ionic residue can cause field failures, so cleanliness testing is a standard part of process control and incoming or outgoing quality assurance.

Ensure PCB Quality with NCT

Protect your electronics from ionic contamination failures. The NCT Neo Cleanliness Tester delivers IPC-compliant precision testing for the most demanding quality standards.

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