RTX
What Is RTX (Real-Time X-ray)?
RTX (Real-Time X-ray) is a non-destructive X-ray inspection method that produces live radiographic images of a sample’s internal structure. In materials and electronics work, RTX typically uses a microfocus X-ray source and detector to visualize internal features such as voids, cracks, misalignment, solder integrity, and density variations—often without opening or sectioning the part.
Key advantages
Non-destructive internal inspection for many parts and assemblies
Fast localization of hidden issues before destructive cross-sectioning
Excellent for electronics, solder joints, and metallurgical samples (project-dependent)
What RTX Is Used For
RTX is commonly used to detect and evaluate:
Voids and porosity (e.g., in solder joints, brazes, castings—project-dependent)
Cracks and internal damage (handling, impact, fatigue initiation—project-dependent)
Solder joint quality (BGA/under-package regions, bridges/opens indicators—project-dependent)
Assembly misalignment (component placement, internal shift, foreign objects—project-dependent)
Inclusions or density variations in metallurgical samples (project-dependent)
Process comparisons (before/after rework, supplier changes, new process windows)
Why RTX (vs. Cross-Sectioning or Standard X-ray)?
Compared with destructive cross-sections: RTX helps you find the defect first, so any follow-on sectioning (mechanical or FIB) can be targeted to the true ROI.
Compared with static radiography: RTX emphasizes live inspection—useful for quick exploration, multiple viewing angles, and iterative troubleshooting.
Sample Types We Support
RTX can be applied to many sample forms (project-dependent), including:
Electronics & packaging: PCBs, components, solder joints, connectors
Metals & assemblies: welds/brazes, small cast parts, machined assemblies (project-dependent)
Composite/adhesive assemblies (project-dependent): internal voids, trapped air, bond quality indicators
Small mechanical parts: fastener assemblies, housings, microfeatures (project-dependent)
Best practice: include a reference/control (known-good) sample when the goal is “what changed?”
Typical Workflows
Quick Internal Screening (Go/No-Go)
Best for: incoming inspection, fast triage
Scan from multiple angles
Flag suspect regions and document key frames
Provide a concise defect summary
Failure Localization (Find the ROI)
Best for: intermittent failure, suspected void/crack site
Systematic inspection to identify the most likely defect location
Mark ROI for targeted cross-section or additional testing
Process / Rework Comparison
Best for: verifying process changes or repairs
Before/after RTX imaging under consistent settings
Clear comparison of voiding, alignment, or internal geometry shifts
What You Receive
RTX images (and short video clips if needed, scope-dependent)
Annotated findings: defect type, location, relative severity, and key dimensions where measurable (project-dependent)
Recommendation for next steps when confirmation is required (cross-section, SEM/EDS, CT, etc.)
Sample Submission Guidelines
Please provide
Sample description and the question (voids? cracks? solder quality? alignment?)
ROI marking and orientation notes (photos help a lot)
Any process history (reflow/rework, thermal cycling, mechanical shock, supplier/lot change)
Reference/control sample whenever possible
Packaging tips
Protect from shock/bending during shipping (new cracks can form in transit)
Keep orientation labeled (top/bottom, connector side, etc.)
For ESD-sensitive electronics, use appropriate ESD packaging
FAQs
Is RTX the same as CT (Computed Tomography)?
Not exactly. RTX is typically 2D real-time radiography. CT reconstructs a 3D volume from many projections. RTX is often faster for screening; CT is used when you need full 3D defect geometry (project-dependent).
Can RTX quantify void percentage in solder?
Often it can provide practical voiding indicators and measurements depending on geometry and method requirements, but exact quantitation rules depend on your standard/spec and the specific joint type (project-dependent).
Is RTX destructive?
RTX is generally non-destructive. The sample is exposed to X-rays, but the part remains intact (project-dependent).
When do you recommend follow-on cross-sectioning?
When you need definitive confirmation of the mechanism, microstructure, or chemistry (e.g., IMC issues, corrosion, contamination). RTX is excellent for locating where to section.
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