A Shielded-Block Preconditioner for Reduced-Domain Layered-Medium Integral-Equation Methods

A shielded-block preconditioner is adopted to reduce the iteration count of layered-medium integral-equation (LMIE) solvers that include dense metallization layers in the Green's functions. Similar to other sparse block preconditioners, the preconditioner is suitable for integration with parallel LMIE solvers to facilitate the analysis of full-size package models. The performance of the preconditioner is demonstrated by analyzing a via array extracted from a full-size package model.