Import Stackup

This example shows how to import stackup file.

Import the required packages

import json
from pathlib import Path
import tempfile

from IPython.display import display
import pandas as pd
from pyaedt.downloads import download_file

from pyedb import Edb

AEDT_VERSION = "2024.1"
NG_MODE = False

Download the example PCB data.

temp_folder = tempfile.TemporaryDirectory(suffix=".ansys")
file_edb = download_file(source="edb/ANSYS-HSD_V1.aedb", destination=temp_folder.name)

Load example layout.

edbapp = Edb(file_edb, edbversion=AEDT_VERSION)

PyAEDT INFO: Logger is initialized in EDB.
PyAEDT INFO: legacy v0.23.0
PyAEDT INFO: Python version 3.10.11 (tags/v3.10.11:7d4cc5a, Apr  5 2023, 00:38:17) [MSC v.1929 64 bit (AMD64)]
PyAEDT INFO: Database ANSYS-HSD_V1.aedb Opened in 2024.1
PyAEDT INFO: Cell main Opened
PyAEDT INFO: Builder was initialized.
PyAEDT INFO: EDB initialized.

Review original stackup definition

Get original stackup definition in a dictionary. Alternatively, stackup definition can be exported in a json file by edbapp.configuration.export()

data_cfg = edbapp.configuration.get_data_from_db(stackup=True)

PyAEDT INFO: Getting data from layout database.

df = pd.DataFrame(data=data_cfg["stackup"]["layers"])
display(df)

	name	type	material	fill_material	thickness
0	1_Top	signal	copper	Solder Resist	0.000035
1	DE1	dielectric	Megtron4		0.000100
2	Inner1(GND1)	signal	copper	Megtron4_2	0.000017
3	DE2	dielectric	Megtron4_2		0.000088
4	Inner2(PWR1)	signal	copper	Megtron4_2	0.000017
5	DE3	dielectric	Megtron4		0.000100
6	Inner3(Sig1)	signal	copper	Megtron4_3	0.000017
7	Megtron4-1mm	dielectric	Megtron4_3		0.001000
8	Inner4(Sig2)	signal	copper	Megtron4_3	0.000017
9	DE5	dielectric	Megtron4		0.000100
10	Inner5(PWR2)	signal	copper	Megtron4_2	0.000017
11	DE6	dielectric	Megtron4_2		0.000088
12	Inner6(GND2)	signal	copper	Megtron4_2	0.000017
13	DE7	dielectric	Megtron4		0.000100
14	16_Bottom	signal	copper	Solder Resist	0.000035
15	Measures	measure	NaN	NaN	NaN
16	SIwave Regions	siwavehfsssolverregions	NaN	NaN	NaN
17	Top Overlay	silkscreen	NaN	NaN	NaN
18	Top Solder	soldermask	NaN	NaN	NaN
19	Bottom Solder	soldermask	NaN	NaN	NaN
20	Bottom Overlay	silkscreen	NaN	NaN	NaN
21	Outline	outline	NaN	NaN	NaN
22	Rats	airlines	NaN	NaN	NaN
23	Errors	errors	NaN	NaN	NaN
24	Symbols	symbol	NaN	NaN	NaN
25	Postprocessing	postprocessing	NaN	NaN	NaN

Modify stackup

Modify top layer thickness

data_cfg["stackup"]["layers"][0]["thickness"] = 0.00005

Add a solder mask layer

data_cfg["stackup"]["layers"].insert(
    0, {"name": "soler_mask", "type": "dielectric", "material": "Megtron4", "fill_material": "", "thickness": 0.00002}
)

Review modified stackup

df = pd.DataFrame(data=data_cfg["stackup"]["layers"])
display(df.head(3))

	name	type	material	fill_material	thickness
0	soler_mask	dielectric	Megtron4		0.00002
1	1_Top	signal	copper	Solder Resist	0.00005
2	DE1	dielectric	Megtron4		0.00010

Write stackup definition into a json file

file_cfg = Path(temp_folder.name) / "edb_configuration.json"
with open(file_cfg, "w") as f:
    json.dump(data_cfg, f, indent=4, ensure_ascii=False)

Load stackup from json configuration file

edbapp.configuration.load(file_cfg, apply_file=True)

<pyedb.configuration.cfg_data.CfgData at 0x28f8ac11b80>

Plot stackup

edbapp.stackup.plot()

C:\actions-runner\_work\pyedb\pyedb\.venv\lib\site-packages\pyedb\dotnet\edb_core\stackup.py:2862: UserWarning: FigureCanvasAgg is non-interactive, and thus cannot be shown
  plt.show()

<module 'matplotlib.pyplot' from 'C:\\actions-runner\\_work\\pyedb\\pyedb\\.venv\\lib\\site-packages\\matplotlib\\pyplot.py'>

Check top layer thickness

edbapp.stackup["1_Top"].thickness

5e-05

Cleanup

edbapp.close()

True