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Beyond Visual Inspection: How X-Ray Technology Secures Zero-Defect Manufacturing in Electronics

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    In the high-stakes world of EMS manufacturing—where giants like Scanfil and Celestica operate—Optical Inspection (AOI) is no longer enough. With the miniaturization of components (CSP, QFN, Flip-Chip) and the ubiquity of BGAs, the most critical solder joints are hidden from view.

    Seamark ZM’s X-Ray Inspection Systems provide the Non-Destructive Testing (NDT) capability required to meet IPC-A-610 Class 3 standards. We don't just "see" through the board; we analyze the internal quality of every connection to prevent field failures.


    1. The Hidden Danger: Why You Need X-Ray for BGA/CSP

    Visual inspection cannot detect the most common defects in modern SMT processes:

    • Voiding (气泡): Trapped gas that weakens the joint.

    • Head-in-Pillow (HiP): A defect where the solder ball rests on the pad but doesn't coalesce.

    • Solder Bridging: Micro-shorts hidden under the component body.

    According to IPC-7095 standards, voiding in BGA solder balls must typically be kept under 25%. Seamark ZM equipment automates this measurement, removing human error from the equation.

    X-Ray_Inspection_Result__Void_Analysis.jpg

    As seen above, our software automatically identifies voids and calculates the percentage area, generating a Pass/Fail result instantly.


    2. Core Technology: Micro-Focus & 5-Axis Linkage

    Precision starts with the hardware. Seamark ZM (e.g., ) utilizes industrial-grade components designed for 24/7 operation.

    • Micro-Focus Closed Tube: With a focal spot size as small as 2μm, our system can detect defects that are invisible to standard medical X-rays. High magnification ensures clarity even for 0.3mm pitch devices.

    • 5-Axis Linkage & Tilt Detection (60°):A top-down view isn't always enough. Our detector can tilt up to 60 degrees. This allows operators to look "under" the BGA ball to detect Head-in-Pillow defects and layer separation, which are critical for reliability in automotive and server electronics.

    Seamark_ZM_X-ray_inspection_system_with_5-axis_linkage_and_60-degree_tilt_detection_for_side-view_analysis..png

    3. CNC Automation: Built for High-Volume Production

    For Tier-1 EMS providers like Scanfil, efficiency is key. Manual inspection is too slow for mass production.

    Seamark ZM integrates CNC Programmable Inspection:

    1. Map Creation: Engineers can set inspection points on the PCB navigation map.

    2. Auto-Run: The machine automatically moves to each coordinate, optimizes voltage/current, captures the image, and analyzes it.

    3. Batch Processing: Suitable for inspecting trays of chips or identical PCBA panels, dramatically increasing UPH (Units Per Hour).


    4. Closing the Loop: Rework & Validation

    X-Ray inspection is the judge; the Rework Station is the surgeon. To establish a complete quality loop, industry leaders integrate Seamark ZM’s inspection data with our rework capabilities.

    • Step 1: Detect the specific defect (e.g., Bridge on Pin A1) using the X-Ray System.

    • Step 2: Transfer the board to the  for precision desoldering and replacement.

    • Step 3: Re-inspect via X-Ray to confirm the void rate is within IPC specs.

    This closed-loop process is why top manufacturers trust Seamark ZM for their most expensive boards.


    Conclusion

    Don't leave your product quality to chance. Whether you are validating a new NPI process or conducting batch quality control, Seamark ZM provides the "eyes" you need to ensure zero defects.

    Ready to upgrade your Quality Control?


    Contact us for a sample test—send us your board, and we will send you the X-Ray report.


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    jackie@zhuomao.com.cn
    0086-0755-29929955
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