Dry Circuit Contact Coating
Original Publication Date: 1984-Aug-01
Included in the Prior Art Database: 2005-Feb-04
This article discloses formulations for electrical contact coatings that enhance the performance of non-noble metal contacts when used in dry circuit applications. Dry circuits are defined here as circuits that do not have sufficient current or voltage to burn through oxide films or other contaminants that form on separable electrical contacts. Computer circuits are mostly dry circuits and have previously required noble metal contacts in separable electrical connectors to achieve the reliability demanded of the product. If the connector is expected to be used frequently, it has been necessary to apply more noble metal to accommodate the increased wear cycles (durability). The relatively high cost of noble metals has prompted a search for lower cost metals that might perform as well as gold.