A method to quantify the surface insulation resistance performance of conformal coatings exposed to different temperature/humidity conditions

Author

Tomlins, P.E.

Author_Institution

Centre for Mater. Meas. & Technol., Nat. Phys. Lab., Teddington, UK

fYear

2000

fDate

2000

Firstpage

346

Lastpage

349

Abstract

Typical conformal coatings based on different chemistries and formulated by different manufacturers are selected for a particular application on the basis of a single value for surface insulation resistance measured at a particular temperature and humidity. This information is limited in that the performance of the coating under a wider range of environmental conditions as might be encountered during the product lifetime cannot be assessed. This procedure describes a method for determining two indices that can be used to quantify the performance of conformal coatings over a range of temperatures under damp conditions

Keywords

circuit reliability; conformal coatings; environmental degradation; humidity; insulating coatings; plastic packaging; printed circuit manufacture; printed circuit testing; surface conductivity; thermal stresses; conformal coating application; conformal coating chemistries; conformal coating manufacturers; conformal coatings; damp conditions; environmental conditions; measurement humidity; measurement temperature; performance indices; product lifetime; surface insulation resistance; surface insulation resistance performance; Circuits; Coatings; Conducting materials; Corrosion; Electrical resistance measurement; Humidity; Insulation; Manufacturing; Surface resistance; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronic Materials and Packaging, 2000. (EMAP 2000). International Symposium on

Conference_Location

Hong Kong

Print_ISBN

0-7803-6654-9

Type

conf

DOI

10.1109/EMAP.2000.904178

Filename

904178