Transducers / Systematic and very precise
OKOS ultrasonic transducers are specially designed for flaw detection, thickness measuring, bond line inspection, and materials research. The inherent properties of sound make transducers a critical component for non-destructive testing in research and manufacturing facilities.
OKOS offers a large variety of custom hand built transducers for different semiconductor package types. Continuous innovation, using new construction techniques, keeps OKOS transducers as the top performing probes for SAM. Transducers can be designed and built for customer specific applications.
Transducers / The technology
Current ultrasonic technologies require users to choose between sensitivity, and resolution. The DeepFocus Acoustic Microscope Transducer with Integrated Pulser-Receiver (DF-100) has high resolution, is extremely sensitive, compact and has a depth of field that allows it to remain in focus over 0.4 in. of water path variability. This system will detect fill voids, cracks, delaminations and other surface and subsurface anomalies, and provide precision flaw location.
OKOS offers 4 types of transducers for customer applications:
Epoxy – Epoxy tipped transducers tend to be less than 30 MHz and are useful for imaging thick samples or samples with very attenuative material. These often have the largest focal lengths.
PVDF – PVDF transducers have a gold tipped exposed element for imaging. They have frequencies in the range of 35 MHz to 75 MHz. They are well suited for thinner samples with attenuative layers such as silicon-based chips. Most focal lengths range from 0.25 inches to 1.5 inches.
Delay Line – Delay Line transducers are quartz lens tipped transducers with internal crystals manufactured to a precise thickness to control frequency. These transducers can range from 35 MHz to 300 MHz, have the best depth of field, and can have custom focal lengths.
Phased Array – Phased array transducers contain multiple elements unlike the single element in other transducers. The transducer can also be curved in shape. This allows for faster scans as the elements simultaneously brush over samples and faster scans of curved surfaces. Using constructive interference between the elements, focal lengths can be changed at any time to achieve the best results. Phased array transducers are typically 20 MHz or below.