Patent ID: 6269315
Filing Date: 2001-07-31
Classification: G01R

Abstract:
A reliability testing method for a dielectric thin film, comprising the steps of:testing a plurality of dielectric thin films by performing an exponential current ramp test (ECR) with a delay time to obtain an exponential relationship between a current ramp charge-to-breakdown distribution and a cumulative distribution failure percentage (CFD), of each dielectric thin film;obtaining a value of the charge-to-breakdown distribution q.sub.BD,ECR at a specified percentage of cumulative distribution failure (CFD);calculating a factor A.sub.ECR by an equation Q.sub.BD,ECR =A.sub.ECR (t.sub.d).sup.n, wherein n is a pre-characterized constant;calculating a factor m by n=m/(m+1);obtaining a factor A.sub.CCS by substituting m into an equation: ##EQU6##wherein .xi. is a pre-characterized constant, and r.sub.0 is a factor determined by an increment of the current ramp; andcalculating a value of a charge-to-breakdown Q.sub.BD,CCS by substituting the value of A.sub.CCS into an equation Q.sub.BD, CCS =A.sub.CCS (J.sub.SPEC).sup.-m by providing a specified current density J.sub.SPEC.