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> SBT Ultrasonic Non-Destructive Testing: Building the Quality Foundation for AI Computing
Amid the rapid expansion of AI computing power, thermal management has become a critical bottleneck for industry advancement. With the launch of NVIDIA's GB200 and the next-generation GB300 servers, power density per rack has reached unprecedented levels—exceeding 100 kW. Traditional air cooling can no longer meet such demanding heat dissipation requirements, making liquid cooling the new standard in data centers.
The GB300, NVIDIA's latest AI super server platform following the GB200, is equipped with Blackwell Ultra GPUs and Grace CPUs, designed specifically for AI model training and inference. It delivers a more than 50% performance improvement over its predecessor while reducing power consumption. Featuring a high-density design, each server integrates up to 72 GPUs and 36 CPUs, and comes standard with advanced components such as liquid cooling, Co-Packaged Optics (CPO), and Backup Battery Units (BBUs).
However, behind the efficient operation of liquid cooling systems lies an often-overlooked risk: the quality and reliability of microchannels within cold plates. Even minor defects—such as micro-cracks in materials, insufficient welding, or structural inconsistencies—can lead to coolant leakage during long-term operation, resulting in costly damage to chip components.
Addressing this common industry challenge, ultrasonic non-destructive testing (NDT) technology is proving to be indispensable. By using high-frequency sound waves to scan the internal structures of cold plates, this technology can accurately detect micron-level material defects and structural abnormalities—all without disassembly or component damage—enabling comprehensive quality assessment.
The principle of ultrasonic testing relies on the differences in how sound waves propagate through various media. When sound waves encounter internal material defects, they produce signal variations such as reflections and scattering. By analyzing these signals with professional equipment, inspectors can precisely identify the location, size, and type of defects.
As high-end servers like the GB200/GB300 are deployed at scale, the reliability requirements for liquid cooling systems have reached unprecedented levels. Leading thermal solution providers such as Auras and AVC have already established deep collaborations with NVIDIA to supply high-quality liquid cooling solutions for the GB series.
Conventional testing methods like air pressure tests and visual inspections struggle to detect microscopic defects. In contrast, ultrasonic testing provides a comprehensive and accurate internal quality profile. SBT Ultrasonic's advanced ultrasonic testing solutions utilize multi-frequency composite detection technology, adaptable to various materials and structures. This approach not only identifies defects but also intelligently classifies them, providing data-driven support for process optimization.
With the rapid adoption of liquid cooling technology in AI servers, quality inspection requirements for cold plates continue to rise. As a leader in ultrasonic testing, SBT Ultrasonic has developed a complete product portfolio tailored to the specific needs of the liquid cooling industry. This includes high-precision single-channel, multi-channel, and phased-array ultrasonic testing equipment capable of detecting micron-level pores, cracks, and delamination defects inside cold plates and heat exchangers. Paired with an intelligent defect recognition system, these tools significantly enhance detection accuracy and efficiency—enabling domestic replacement of high-end cold plate ultrasonic testing equipment.
Ultrasonic Testing Product Portfolio
Key features include:
Algorithm results delivered immediately after inspection, greatly improving efficiency
Customizable template support without secondary development, enabling quick adaptation across product lines
Seamless integration into production lines for fully automated inspection
Data traceability and analysis functions for building comprehensive quality records
SBT Ultrasonic’s solutions provide cold plate manufacturers with powerful quality assurance tools, supporting the large-scale commercial application of liquid cooling systems.
As the “quality gatekeeper” for liquid cooling systems, ultrasonic testing technology is playing an increasingly vital role. It has already become a core quality control method for multiple leading liquid cooling manufacturers, providing essential technical assurance for widespread commercial adoption.
Looking ahead, SBT Ultrasonic will continue to advance technology development and promote the application of ultrasonic testing across broader fields, offering solid technical support for industry progress.
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