B. P. Sood, D. Das, M. H. Azarian, M. Pecht, CALCE, University of Maryland, College Park, MD

Summary: Negative resistance drift in thick film chip resistors at high temperature and high humidity application conditions was investigated. The paper reports investigation of possible causes including current leakage paths on the printed circuit board, delamination between the resistor protective coating and laser trim and, possibility of silver migration or copper dendrites formation.