Whereas some optical assembly applications require optical clarity across a certain wavelenth, others require an opaque coating. Optical grade epoxies, silicones and UV curable coatings provide the versatility to adhere well to a wide variety of substrates and the critical performance properties necessary.
As advances in epoxy and silicone materials constantly evolve, manufacturers of advanced electronic systems will find that adhesives offer the ability to meet nearly any combination of requirements for thermal, environmental, and structural stability.
The unique requirements of microelectromechanical systems (MEMS) call for specialized materials. Versatile epoxy adhesives are often capable of providing the necessary properties to ensure support and protection from thermal and mechanical shock, vibration, high acceleration, particles, and other physical damage.
With the trend toward smaller and smaller electronic devices, unintentional EMI/RFI interference has become more of an issue. Shielding of these interferences is critical and coatings can be successfully applied as protection on the materials used.
One of the most effective approaches to prevent and inhibit corrosion of metals is to create a protective barrier over the component. This is most easily achieved with the use of a coating compound. Coatings protect against corrosion, moisture and other chemicals from attacking metal parts.
Dielectric constant, dissipation factor, dielectric strength, surface and volume resistivity are all fundamental electrical properties of epoxies. How they are measured, what values are desirable and how they react to changes in temperature, fillers and other variables are considered in this paper.