A new method for comparing migration abilities of conductor systemsbased on conventional electroanalytical techniques

摘要

There are various metallization types, pure metals as well asalloys, showing very different abilities for migration. Their comparisonis available only through empirical way. There are two mainpossibilities for getting information or comparison about the migrationbehavior of a sample: the water drop test and accelerated climatictests. The results are generally uncertain showing large spreading andcan only be interpreted with difficulties. Further problems are theundefined conditions and many subjective things with the Water Drop (WD)test while rather long periods of tests and special test chambers arenecessary to perform climatic tests. A third method has been developedand will be presented in the paper for testing metallization systemsbased on a powerful technique; this is the very well known cyclicvoltammetry used in the electroanalytical chemistry. The resultsindicate an effective method for making quick comparison betweenmetallization systems in connection with their migration abilities