Abstract: Described herein is a hierarchical learning-based method, called HierPINN-EM, to solve the Korhonen equations for multi segment interconnects for fast EM failure analysis. HierPINN-EM split the physics laws into two levels and solve the PDE equations step by step. The lower level employs supervised learning to train a DNN model which takes parameterized neurons as inputs and serves as a universal parameterized EM stress solver for single segment wires. The upper level employs physics-informed loss function to train a separate DNN model at the boundaries of all wire segments to enforce the stress and atom flux continuities at internal junctions in interconnects.