Patent ID: 8631372
Filing Date: 2014-01-14
Classification: G06F

Abstract:
1. A computer implemented method comprising: accessing a three-dimensional integrated circuit (3D-IC) model stored in a tangible, non-transitory machine readable medium, the model comprising a plurality of elements representing a 3D-IC design to be fabricated and to be operated under a condition; generating a temperature map in a computer processor based on the 3D-IC model, the temperature map including temperatures at a plurality of points of the 3D-IC based on the 3D-IC operating under the condition; identifying an electromigration (EM) rating factor at each of the plurality of points based on the 3D-IC; and outputting data representing a temperature-dependent electromigration (EM) current constraint at each of the plurality of points of the 3D-IC based on the electromigration (EM) rating factors, wherein the EM rating factor at each of the plurality of points is calculated based on an EM performance capability of a point at a temperature relative to the EM capability at a reference temperature, the EM performance capability of a point at a temperature being calculated based on the temperature and a current density of the point; and the temperature-dependent EM current constraint at one of the points of the 3D-IC is obtained based on the corresponding electromigration rating factor and an electromigration constraint at a reference temperature.