Model Extraction Using PowerSI/3D-EM

1. 1
Model Extraction Using PowerSI/3D-EM
Jian Guan
Software Engineer
Cadence Sigrity R&D US
4/17/2018

2. 2
Outline
1. PowerSI Model Extraction
2. 3D-EM Model Extraction

3. 3
PowerSI Model Extraction
1. What is .spd file (geometry, material, etc.)
2. Create/Modify layout structures
3. Set up excitation ports
4. Set up simulation frequencies
5. Start simulation
6. Post processing

4. 4
0.1 mm
PowerSI Model Extraction
Example: one trace
Simulation frequencies: 10 MHz – 2 GHz
Impedance: around 50 Ohm
(mm)

5. 5
3D-EM Model Extraction
1. What is .spd file (geometry, material, solver options,
etc.)
2. Create/Modify layout structures
3. Set up excitation ports
4. Set up simulation frequencies
5. Set up solver options
6. Post processing

6. 6
3D-EM Model Extraction
Example 1: one trace
Simulation frequencies: 10 MHz – 2 GHz
0.1 mm
(mm)

7. 7
3D-EM Model Extraction
Example 2: Layer transition
Simulation frequencies: 100 MHz – 10 GHz
5 layers in total:
2 metal layers
3 medium layers
1
2
3
4
5
2 nets:
1 GND
1 signal net
Pad Stack:
Define how vertically
connected

8. 8
Trace width: 5.25 mil
• Create layers -- Signal/Plane/Medium layer
• Create nets -- Signal/Power/GND nets
• Create structures such as shape/trace/via/wirebond/pad/lead,
and assign each structure with a net property.
• For a via, a padstack needs to be created and assigned.

9. 9
Summary
1. Understand the layout
2. Create .spd file (complicated layouts provided by layout engineers)
• Create layers (Edit/Stack Up)-Signal/Plane/Medium layer
• Create nets (Setup/Net Manager)-Signal/Power/GND nets
• Create structures such as shape/trace/via/wirebond/pad/lead,
and assign each structure with a net property.
• For a via, a padstack needs to be created and assigned.
3. Set up excitation ports
4. Set up simulation frequencies
5. Set up solver options
6. Post processing

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