DETERMINATION OF EFFECTIVE BURN-IN TIME FOR PRINTED BOARD ASSEMBLY

Burn-in is an effective means for screening out defects that contribut e to infant mortality failures. Various studies have been conducted fo r determining: the optimum hum-in time for a device. However, most of them assume cost models, which are difficult to quantify. In this arti cle, we take a more realistic approach for determining the effective b rim-in time for a PBA(Printed Board Assembly) to satisfy the customer requirement that tile failure rate after burr-in be less than a specif ied value. Tile proposed method is applied to two types of PBAs used i n a certain electronic switching system.