CST STUDIO SUITE EM Plug-In for Cadence/CST integrated workflow

Transcription

1 CST STUDIO SUITE EM Plug-In for Cadence/CST integrated workflow May 2011 Martin Biehl, Cadence

2 Outline Introduction EM modeling challenges Release compatibility Cadence/CST integrated workflows EM Expert Mode EDA Expert Mode Use of models in Cadence SI/SiP-RF

3 Introduction

4 EDA goes 3D Bond wires Multiple PCBs BGAs connectors Multilayer PCBs Non-ideal rp o Increasing of clock frequencies and constant decreasing of edge rates o Shifting market demands: higher performance, higher functionality, wireless, power efficiency, smaller form factor o Low voltage levels in high-speed PCBs

5 EM modeling challenges Layout Data Conversion: 3D data objects (e.g. wires, bumps, balls) Nets and Reference Net Selection S-Parameter management (back annotation) 3D EM Solver choice and simulation settings

6 EM expert vs. EDA expert

7 EM expert Import EDA layout and work in EM tool (CST STUDIO SUITE )

8 EDA expert Remain in EDA tool, but take advantage of 3D full wave simulation

9 Work-Flows Two workflows have been introduced: EM expert EDA expert CST EM approach allows EM expert to utilize 3D EM simulation for SI/PI analysis of complex PCBs/packages CST/Cadence integrated workflow allows EDA expert to take advantage of 3D EM simulation with minimum knowledge

10 Release Compatibility CST Release 2011 Cadence SPB Release 16.3/16.5

11 Cadence/CST integrated workflow (EM Expert)

12 EDA Interface 3D PCB Import Stack-up Editor Component and parts import Customize selection Automatic Port Definition or manual Ports definition in 2D layout viewer Fully automatic cleaning and healing procedure Automatic mesh settings for hexahedral and tetrahedral mesh

13 Export Full Design Extra files are necessary

14 Cadence 3D PCB Import Choose the EDA template. The project templates customize the default settings for particular types of applications. The PCB will be scaled automatically to the unit defined by the template.

15 Cadence 3D PCB Import File Import EDA

16 CST Layout Database The import dialog shows information about the imported design.

17 Stack-Up Editor Check and change the material properties and thickness of the layers. A solder mask can be added.

18 Parts Editor Allows to specify parameters for supported components (R, L and C)

19 PCB Import Dialog: PCB/Preview

20 Customized Selection The PCB import functionality of CST MICROWAVE STUDIO is highly configurable. The whole design as well as only certain parts can be imported. Full Design Net of Interest Area of Interest

21 Import Complete Design To import the complete design just click OK in the import dialog.

22 PCB Import can be re-opened for edits PCB Import settings can be edited Different settings or nets selection can be applied

23 Import Area

24 Import Selected Nets (ideal for SI analysis) The selected nets are highlighted in the design view. First select the nets to be imported. The distance included in the import can be specified.

25 Import Selected Nets Most useful for SI to restrict to selected nets and power / ground

26 Automatic Port Definition: Single-ended

27 Automatic Port Definition: Preview Blue arrows represent the ports

28 Automatic Port Definition: 3D View Red arrows represent the ports Ports are listed in Navigation Tree Port Labels represent Pin Names

29 CST MWS: Mesh Settings Default values, very accurate and slow simulation time Higher values, accurate and fast simulation time

30 CST MWS: define post-processing Important for back annotation

31 CST MWS: Simulation Settings CST Acceleration as well as GPU hardware may be required

32 CST MWS: 1D Results Thanks to GPU technology, CST MWS simulation time can be dramatically reduced.

33 Cadence/CST integrated workflow (EDA Expert)

34 EDA expert Remain in EDA tool, but take advanatge of 3D full wave simulation

35 CST STUDIO SUITE Cadence interface Research project to develop a CST EM Plug-in for the Cadence flow This work was supported by the German Federal Ministry of Education and Research through the DIONYSYS project (Grant No. 01M3084G) in the frame of the IKT 2020 Program. Needs EM simulation Does not want to deal with EM tools

36 Cadence Workflow Integration

37 Cadence Workflow Integration Nets and Reference Net Selection 3D EM Solver choice and simulation settings Interactive and batching modes supported S-Parameter management (automatic Touchstone file generation)

38 CST Link: 3D Simulation Parameters Select Nets to investigate Define Reference Nets for Port definition (VSS)

39 CST Link: Solver Settings open interactively: - allows to make changes before solver starts run in batch mode: - automatically starts solver and finally saves S-Param result file

40 CST Link: Solver Settings

41 CST MWS: 1D Results Thanks to GPU technology, CST MWS simulation time can be dramatically reduced.

42 Use of S-parameter model in Cadence SI/RF flows

43 Digital SiP Signal Integrity using CST o/p - s-param conversion to dml

44 Digital SiP Signal Integrity using CST o/p - Run SI 3D with CST s-param model

45 AMS-SiP parasitic aware simulation - Import s-param model into SiP library

46 AMS-SiP parasitic aware simulation - Import s-param model into SiP library

47 AMS-SiP parasitic aware simulation - Assign s-param model into SiP schematic

48 AMS-SiP parasitic aware simulation - Assign s-param model into SiP schematic

49