Precision Implantable Stent Coating Systems

Sono-Tek ultrasonic coating systems have been used to spray anti-restenosis polymers onto the surfaces of implantable stents for over 2 decades. We have expertise in spraying hundreds of different polymer chemistries. Ultrasonic spray nozzles are advantageous in penetrating complex stent geometries, ensuring full coverage of all strut surfaces. Pressure spray nozzles and air atomizers are not able to provide this type of uniform thin film coating. Coatings applied using ultrasonics are much thinner than can be achieved with dip coating, saving spray material while avoiding webbing. Since ultrasonic nozzles are non-clogging devices, spray quality is not compromised over time due to gradual clogging as seen in pressure nozzle processes.

Advantages of Ultrasonic Spray for Stent Coatings:

• Highly controllable and repeatable spray
• Ability to spray at flow rates as low as 5 microliters per minute
• Droplet sizes as small as 13 microns (with water) and very tight drop distributions
• Low velocity spray adheres to stents without bounceback or overspray
• Proven process for coating implantable stents and many other precision medical device applications
• Highly durable coatings will not flake or peel

Our stent coating systems are full coating solutions, with a sealed spray chamber design and automated PLC process control. For more information on our stent coating systems, go to our MediCoat,
MediCoat II, or MediCoat PSI product pages.

Types of Stents Coated Using Ultrasonic Spray (Metal or Bioabsorbable Materials):

• Arterial
• Peripheral
• Sinus
• Biliac
• Metal