Printed Circuit Boards (PCBs) are the backbone of modern electronics, particularly in aerospace and defence applications where reliability is critical. However, many of the most important features of a PCB—such as solder joints, internal vias, and buried layers—are hidden from view.

This is where X-ray inspection becomes invaluable.

Using advanced imaging systems like the TruView Fusion X-Ray Inspection System, engineers can examine the internal structure of PCBs without damaging them. This process allows manufacturers and integrators to detect hidden defects, verify assembly quality, and ensure products meet the highest reliability standards.

Why X-Ray Inspection is Important

Traditional inspection methods such as visual inspection or optical microscopy can only evaluate the surface of a PCB. However, many critical components are concealed beneath the surface.

X-ray inspection allows engineers to:

• Verify solder joint quality

• Inspect internal layers and vias

• Identify manufacturing defects

• Ensure compliance with quality standards

• Prevent failures before products reach deployment

For industries such as aerospace, defence, and medical electronics, this level of verification is often essential.

Key PCB Features Examined During X-Ray Inspection

Ball Grid Array (BGA) Solder Joints

Ball Grid Array components are widely used in modern electronics due to their high pin density and compact footprint.

However, their solder connections sit underneath the component package, making them impossible to inspect visually.

X-ray imaging allows engineers to examine:

• Solder joint integrity

• Voids within solder balls

• Insufficient solder

• Bridging between connections

• Misalignment during assembly

Detecting these issues early can prevent intermittent faults or long-term reliability problems.

Blind and Buried Vias

Modern PCBs often contain complex multi-layer routing structures, including blind and buried vias that connect internal layers.

These features are completely hidden once the board is manufactured.

X-ray inspection enables engineers to:

• Verify via alignment

• Detect incomplete plating

• Identify cracks or voids

• Confirm structural integrity

For high-reliability systems, ensuring the integrity of these internal structures is critical.

Manufacturing Defects

X-ray inspection can reveal a wide range of manufacturing faults that may not be visible externally, including:

• Voids in solder joints

• Delamination within PCB layers

• Cracked solder joints

• Misaligned components

• Insufficient solder volume

• Foreign material within the board

Identifying these issues early in the manufacturing or integration process can significantly reduce costly rework and potential system failures.

Non-Destructive Inspection

One of the biggest advantages of X-ray inspection is that it is completely non-destructive.

Unlike destructive testing methods that require cutting or physically altering a PCB, X-ray imaging allows engineers to inspect internal structures while keeping the board fully intact.

This makes it particularly valuable for:

• Prototype validation

• Production quality checks

• Failure analysis

• High-value electronics

X-Ray Inspection at RDDS Avionics

At RDDS Avionics, X-ray inspection services are provided using the TruView Fusion X-Ray Inspection System. This advanced system enables high-resolution imaging of PCB internals, helping engineers detect hidden defects and verify assembly quality.

The service is particularly valuable for organisations working with:

• High-reliability electronics

• Complex multilayer PCBs

• BGA-based assemblies

• Aerospace and defence systems

By identifying hidden issues early, X-ray inspection helps improve reliability, reduce risk, and support quality assurance throughout the electronics lifecycle.

If you want to discuss how we can help

Speak to our team