The conformal coating process creates a protective barrier for product substrates. The type of coating material used is a consequence of several conditions:Read More
Parylene Coating Blog by Diamond-MT
Acrylic and urethane conformal coating are widely used conformal coatings. While they share the same methods of applications and ultimate end item uses, there are some differences that should be addressed prior to deciding what conformal coating is the best for your project.
Type AR (acrylic resin) conformal coatings are a popular choice for conformal coating projects because of their moisture protection, low cost, and ease of application. There are many different varieties of type AR conformal coatings such as:
Tin whiskers are electrically conductive, crystalline structures of tin that sometimes grow from surfaces where tin (especially electroplated tin) is used as a final finish. They typically grow from lengths of 1-2 millimeters (mm) but have been observed to lengths in excess of 10 mm. They are a serious issue in the electronics world because they have been known to cause short circuits between circuit elements.
In applications that have an exposure to solvents, acrylic conformal coating is not the best choice. Acrylic conformal coating can be removed with a weaker solvent such as isopropyl alcohol or xylene. Whenever it faces even stronger solvents, it will not offer the protection that is needed, especially if your product is a mission critical device. Other coatings, such as urethane or parylene conformal coating have a far better resistance to solvents than acrylics.
Tags: acrylic conformal coating, conformal coating, HumiSeal 1B31, HumiSeal, urethane conformal coating, epoxy conformal coating, silicone conformal coating, parylene conformal coating, conformal coatings
Tags: Diamond-MT, acrylic conformal coating, conformal coating, conformal coating equipment, conformal coating methods, conformal coating service, conformal coating removal, conformal coating rework, HumiSeal 1B31