Sensor Thin Film Coating Applications
Sono-Tek ultrasonic coating systems are used to spray thin films of polymers, pigments, or other functional coatings in sensors manufacturing for applications such as biometrics security and medical device applications, as well as sensors designed for a variety of other applications, for example: temperature sensing, gas sensing, chemical detection, impedance measurement, and pressure or load sensing, etc…
Coating equipment is commonly used for spraying thin film polymers and other chemistries in the manufacture of fingerprint sensor components for laptops, smart phones, and other electronic devices, as well as medical testing and diagnostic sensor devices. The expanding market for these sensors has led to Sono-Tek’s development of R&D and production systems for that are optimized for these coatings, with capability of expanding to continuous or roll-to-roll systems using the same ultrasonic spray technology.
Both ExactaCoat and FlexiCoat are automated XYZ motion, fully programmable, recipe driven ultrasonic coating systems. Ultrasonic spray offers significant cost savings and process improvements over other coating processes, such as CVD and air atomizers.
Advantages and options for sensors manufacturing coating systems include:
- Easily accommodates batch substrate fixtures, with easy to program selective area coating capability
- Ability to adjust morphology between matte or glossy finish
- Choice of droplet size, depending on nozzle frequency, from 25kHz-180kHz
- AccuMist or Impact ultrasonic nozzle, or dual nozzle configuration
- Range of motion:* ExactaCoat – 400mm x 400mm x 100mm (15.75” x 15.75” x 3.94”) FlexiCoat – 500mm x 500mm x 100mm (19.69” x19.69” x 3.94”), up to 1.2 x 1.2 m
- Thin films from nano layers to several microns in thickness
*Range of motion may be reduced with multiple nozzle or other custom configurations
The AccuMist nozzle (top left) produces a bow shaped spray pattern from 1.78-25 mm (0.070 – 1.0) inches wide. The Impact nozzle (bottom left) produces a wide fan shaped spray pattern up to 15 cm (6 inches) wide. For more information about the AccuMist nozzle, visit http://www.sono-tek.com/accumist/. For more information about the Impact nozzle, visit http://www.sono-tek.com/impact/.
Dual nozzle configuration allows enhanced R&D capability and flexibility for multiple coating applications without having to change ultrasonic nozzles.