DC25_PAPER_Track13_ReducedOrderGeometricMacroModel_McMorrow_Final.pdf

1、 Information Classification:General Reduced Order Geometric Macro Model of PCB Fiberglass Spatial Variation for Skew and Impedance Prediction Scott McMorrow,Samtec Inc Scott.McM,401-864-3647 Sandeep Sankararaman,Samtec Inc S Information Classification:General Abstract A method for modeling PCB fiber

2、glass threads,incorporating a geometric approximation of their shape and an electrical model of the material parameters,will be presented.This model is derived from the electromagnetic analysis of fiberglass filament epoxy-glass mixtures used in conventional PCBs.It can then be integrated into the d

3、ielectric objects placed in a 3D FEM solver.Author(s)Biography Scott McMorrow is a Strategic Technologist for Samtec Inc.As a consultant for years too numerous to mention,Scott has helped many companies develop high performance products,while training signal integrity and electromagnetics engineers.

4、Today he works for“the man,”where he continues being a problem solver,a change agent and“betting his job everyday”.Sandeep Sankararaman serves as Principal Engineer at Samtec Inc.With nearly two decades of experience,Sandeep specializes in signal and power integrity for integrated circuit packages,p

5、rinted circuit boards,PCB connectors,and connectors for cable assemblies.Information Classification:General Section 1-Introduction 1mm in a Dk of 4.8(pure glass)equals 7.3ps,while 1mm in Dk=3(pure resin)is 5.7ps.Escaping large switch packages requires several millimeters of trace,with limited space

6、in the breakout region for traces.Understanding skew accumulation through PCB composites is necessary due to shrinking UI times.Modeling every fiber and metal feature in detail is theoretically possible but computationally expensive.We must find simpler methods,as Einstein suggested.With that goal,l