Protecting Electronics From Extremes
Moisture, thermal, shock, static and vibration are common environmental threats to lasting PCB operation. By applying an added layer of protection known as Conformal Coating, we can extend the expected lifespan of your solution.
Depending on the thickness required, a specially engineered polymeric compound is either sprayed or brushed onto the assembled PCB. This coating “conforms” to the shape of the components and forms a film to keep contaminants away and holds components fast.
Protection Meets Workability
Conformal Coating allows PCB components to remain visible, accessible and reworkable. While not as substantial as resin, conformal coating offers a level of protection against dangers such as salt, spray, fungus and moisture and is a more cost effective form of protection.
How to choose: Potting vs Conformal Coating
Potting Encapsulation
Typically used when environmental risks are inherent to the function of the PCB. Automotive, transit, commercial kitchen appliances, HVAC, home and garden or agricultural systems that may all be exposed to dirt, liquids, moisture, vibration, and extreme temperatures are great examples.
Pros
+ Sealed electronic components provides maximum protection to environmental risks and moisture.
+ Allows for more mounting options for densely populated boards.
+ Increases lifespan of electronics by sealing from all exterior factors.
+ High level of protection to ensure functionality of mission critical components.
Cons
– Once sealed board cannot be reworked.
– Adds weight and bulk to the final product.
Weight could possibly stress some components.
– Curing times and process of pouring resin could lead to longer production times and cost.
Conformal Coating
Typically used where environmental risks are possible but not always present that may harm mission-critical components over time. Conformal coating protects against humidity, thermal shock, static, vibration, and contamination.
Pros
+ Components remain visible and can be reworked or replaced if needed.
+ Thin and lightweight, offers flexibility with no stress on components.
+ Offers protection against low-level risks like dust, humidity, and corrosion.
+ Cost effective spray is faster for bulk production.
+ Long lasting protection over time
Cons
– Is not nearly as durable or resilient to heavy-duty environments.
– Is not waterproof or IPX6 rated.