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The Power Trio Behind Superior SAM Performance
By Del Williams
ning Acoustic Microscopy (SAM) offers a powerful quality control tool, ensuring struc- tural integrity, reliability, and performance — all without damaging a single component. SAM uses high-frequency ultrasound to inspect and characterize internal features of materials, detecting cracks, voids, inclusions, and delaminations that could compromise performance. SAM is a powerful non-invasive and
F
nondestructive method for inspecting inter- nal structures in optically opaque materials. Depth-specific information can be extracted and applied to create two- and three-dimensional images without the need for time-consuming tomographic scan procedures and more costly X-rays. Today, SAM facilitates the detec-
tion of much smaller defects than pre- viously possible. “Advanced, phased array SAM systems make it possible to move to a higher level of failure analysis because of the level of detec- tion and precision involved. In the past, detecting a 500-micron defect was the goal; now it is a 50-micron defect. With this type of testing, we can inspect materials and discover
or manufacturers in electronics, aero- space, and advanced materials like metals, alloys, and composites, Scan -
flaws that were previously undetected,” says Hari Polu, president of OKOS, a Virginia- based manufacturer of industrial SAM ultra- sonic nondestructive testing systems. The company serves the electronics manufactur- ing, aerospace, and metal/alloy/composite manufacturers, and end-user markets. For electronics manufacturers, SAM is
indispensable for inspecting microchips, bonded wafers, and underfills, where failure is not an option. Aerospace firms rely on it to identify subsurface flaws in lightweight com- posites or high-performance alloys, ensuring safety in flight-critical applications. In met-
als and composites, it verifies adhesion qual- ity and detects fatigue or internal corrosion early, saving money and lives. However, to unlock the full power of
SAM, manufacturers need the right system. Toward this goal, the most effective SAM systems are built on a triumvirate of high- performance components: transducers, digi- tizers, and software.
Optimizing SAM Polu explains how transducers, digitizers,
and software seamlessly work together in Scanning Acoustic Micro scopy to benefit man- ufacturers. “Transducers generate and receive the ultrasound signals, acting as the system’s ‘eyes.’ Digitizers con- vert high-frequency acoustic signals into precise digital data for analysis. Software brings it all together, enabling real-time visualization, defect identification, and actionable report- ing. When these three elements work in harmony, SAM becomes more than a quality control step — it becomes a competitive advantage,” says Polu.
Transducers A scanning acoustic microscope
SAM serves as a nondestructive tool for evaluating internal structures in electronics.
operates by utilizing a transducer that converts electrical energy into highly
Continued on next page
Introducing 2 new models of Sayaka PCB Depaneling Router
Stand-alone/In-line 34XJ model offers flexibility and advanced features
S fl
· Stand-alone or In-line selection
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speed (Max 1000mm/sec)
Table-top 23S Model offers a small footprint for limited production space
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· Easy Windows GUI software programming
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marks automatically features Easy Windows GUI software programming
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21241 S. Western Ave. Suite 140 Torrance, CA 90501 Phone: (310) 540-7310 Fax: (310) 540-7930
23785 Cabot Blvd. Suite 306
Hayward, CA 94545 Tel: 510-293-0580 Fax: 510-293-0940
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August 2025
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